Articles (2020)

Sunscreen for Hiking and Backpacking: Efficacy, Ingredient Safety, and Best Practices

Dan Hu reviews current research regarding the safety and efficacy of sunscreen for hiking and backpacking, including ingredient efficacy, safety, and best practices for outdoor adventuring.

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Discussing the Garmin inReach Mini 2 with Garmin Senior Product Manager Chip Noble

In this video interview, Ryan Jordan and Chip Noble (Senior Product Manager at Garmin) discuss the new features of the Garmin inReach Mini 2, including its improved battery life.

Introduction

Garmin released the inReach Mini 2 Satellite Communicator this week. This video presents my interview about the new inReach Mini 2 with Garmin’s Chip Noble, the Senior Product Manager responsible for the Outdoor Traditional and inReach device product lines.

Chip and I discuss several new features of the Garmin inReach Mini 2, including:

  • improved battery life
  • the new user interface
  • changes in how TracBack works
  • the new electronic compass
  • integration with Garmin Explore.

The Interview

 

In the following sections, I will discuss the primary differences between the 1st generation Garmin inReach Mini and the inReach Mini 2 and how important they are to me. The commentary that follows is my own and is not influenced by my conversation with Chip or Garmin. Instead, it relies on my extensive experience with radio and satellite communications devices during my expeditions and 34 years of outdoor guiding experience. In addition, I have spent hundreds of hours of study and testing into how the Garmin inReach works, which led to the development of our How to Use the Garmin inReach Mini Masterclass.

Commentary: Significant Updates

Here are what I perceive to be the significant new features of the Garmin inReach Mini 2:

New Core Processor

The processor upgrade is the most significant change from the 1st generation Garmin inReach Mini and the inReach Mini 2. The practical impact for the user is that the device will run more powerful (feature-rich) software, run it faster, and save battery life.

Improved Battery Life

Expect at least three times more battery life than the 1st generation inReach Mini (for similar tracking settings, messaging, and navigation use. It is important to note that the improved battery life is primarily the result of a silicon upgrade (the processor chip). Therefore, you will see improved battery life across the board and not just while tracking.

Garmin Explore Integration

The Garmin inReach Mini 2 satellite communicator says goodbye to Garmin Earthmate and joins the Garmin Explore software family. Earthmate, the legacy inReach software, never entirely made it to the modern age of UI/UX design. In contrast, Explore is more capable, powerful, and easier to use for trip planning, navigation, and analysis on mobile and desktop devices. Both pieces of software are addressed in our inReach Masterclass.

Always-On TracBack

In our How to Use the Garmin inReach Mini Masterclass, I recommended turning the TracBack feature off to save battery life. However, this is a valuable feature for beginners or off-trail travelers exploring dense vegetation. Hikers who like to wander (hunting comes to mind) in timber may appreciate it. I have used TracBack when camped in forested areas when I have had to hang my bear bag (or find an eco-friendly spot to poop) at night, far away from camp. TracBack allows me to quickly find my way back to my tent without wandering.

On the Garmin inReach Mini 2, TracBack is always on and running in the background. The new battery optimization of the inReach Mini 2 will be a welcome safety feature for some users. Knowing that they will not have to remember to start the TracBack program when they begin their trip will come as welcome relief.

Commentary: Minor Updates

The inReach Mini 2 also received some minor updates worth noting:

  1. Electronic (digital) compass. A true digital compass that does not require motion to orient direction (unlike older GPS-based compasses).
  2. Higher screen resolution. The Garmin inReach Mini 2 has a screen resolution of 176 x 176 pixels, up from 128 x 128 pixels on the 1st generation inReach Mini.
  3. Improved user interface and user experience (UI/UX). More straightforward device navigation, more akin to outdoor watches from Garmin like the Instinct and Fenix product lines.
  4. USB-C for charging and data transfer. The 1st generation inReach Mini uses a micro-USB port, and the new inReach Mini 2 uses a USB-C port. The port upgrade will primarily impact charging in the field. The hiker may need to pack a new cable type (i.e., USB-C) or may already use USB-C rechargeable devices. I am looking forward to when I no longer need to carry multiple USB cable types for my battery charger. garmin inreach mini 2 showing navigation, tracback, and digital compass screens

The Garmin inReach Mini 2 satellite communicator gets a user interface (UI) facelift familiar to Garmin Instinct and Fenix outdoor watch users. Photo: Garmin.

Other Issues of Note

In addition, there are some other changes that most users will not perceive to impact their user experience, including:

  • Satellite networks: The ability to communicate with a wider variety of worldwide satellite networks may speed up your location fix time in complex geography for North American users. However, access to Galileo, QZSS, or Beidou satellite networks will primarily impact users outside of the Americas. In addition, reliable GLONASS support will not likely be introduced with any satellite communicator that uses the Iridium network for communications because of the known susceptibility to interference between the GLONASS L1 band and the Iridium frequency. This interference has been known for more than a decade [source].
  • Use as a standalone device: Most users will pair their Garmin inReach Mini 2 with a smartphone to maximize efficiency and ease of use, especially when typing messages. However, updates in the UI/UX, the addition of a digital compass, and the ability to see tracks on the device may tempt more hikers to use the device unpaired.

FAQs

I already own the Garmin inReach Mini (1st Generation). Should I upgrade to the Garmin inReach Mini 2?

Every hiker has to answer this question for themself. For me, the ability to use a device on a long trip without recharging is an improvement. In addition, the upgrade from Earthmate to Explore makes for a more enjoyable pre-trip and post-trip experience on my desktop. Explore is also more user-friendly to use than Earthmate on a mobile device. The other features do not play into my decision to upgrade. I use a digital compass primarily on my watch. I use the TracBack feature sparingly (e.g., perhaps one or two times during a 10-day expedition). More satellite support is not a significant need for me because most of my hiking is in the mountains of the North American west. Improved battery life and Explore integration are enough to justify the upgrade for me.

Will the 1st generation inReach Mini get a firmware update that will make it compatible with Garmin Explore?

While the 1st generation inReach Mini will still be supported by Garmin with firmware updates as needed, forward compatibility with Garmin Explore will not be possible. The 1st generation inReach Mini uses a different Bluetooth protocol that is not compatible with the Explore app. In theory, it’s possible, but because the Mini 1 has so little unallocated memory, it doesn’t have enough memory margin to support the new protocol.

I do not yet own a satellite communicator. Is the Garmin inReach Mini 2 the best entry point?

I will not say that it is the best because “best” will always depend on users’ needs. However, the inReach Mini 2 is undoubtedly the most powerful and capable standalone satellite communicator available. That is a critical designation because it gives me duplicity of function in case of a smartphone failure. Plus, the opportunity to leave the smartphone at home is always welcome. That said, there are other capable satellite communicators on the market, and you will find our current recommendations in the Gear Shop.

Should I buy a 1st Generation Garmin inReach Mini?

With the introduction of the Garmin inReach Mini 2, the 1st generation inReach Mini’s will start flooding the used gear market. They will (likely) be closed out by retailers at sale prices. At a price of less than $200, the 1st generation inReach Mini would be a very good deal. However, suppose you are interested in pre-trip planning or post-trip analysis or want the most positive user experience possible with desktop and mobile apps. In that case, Garmin Explore (Mini 2) is more capable and user-friendly than Garmin Earthmate (Mini 1st generation). In addition, Earthmate is now a legacy package. It will receive minimal maintenance and support from Garmin, having reached the end of its development cycle. Look for continuous development and improvement of Explore.

Zoleo or Garmin inReach Mini 2?

I would only recommend the Zoleo if you need seamless message threading across satellite, WiFi, and cellular networks. I would recommend the inReach Mini 2 if you want a smaller, lighter package more capable as a standalone device. In addition, the inReach may be a better option if you want to integrate your satellite communicator into a Garmin ecosystem that includes Instinct or Fenix watches and Explore software. Other differences between the two communicators are otherwise relatively insignificant.

Learn More

Where to Buy

DISCLOSURE (Updated April 9, 2024)

  • Backpacking Light does not accept compensation or donated/discounted products in exchange for product mentions or placements in editorial coverage. Some (but not all) of the links in this review may be affiliate links. If you click on one of these links and visit one of our affiliate partners (usually a retailer site), and subsequently place an order with that retailer, we receive a commission on your entire order, which varies between 3% and 15% of the purchase price. Affiliate commissions represent less than 15% of Backpacking Light's gross revenue. More than 70% of our revenue comes from Membership Fees. So if you'd really like to support our work, don't buy gear you don't need - support our consumer advocacy work and become a Member instead. Learn more about affiliate commissions, influencer marketing, and our consumer advocacy work by reading our article Stop wasting money on gear.

By the Numbers: Compression Resistance of PrimaLoft Gold vs. Climashield Apex (Part 4)

PrimaLoft Gold outperforms Climashield Apex as the more resilient (durable) insulation, capable of retaining more of its original warmth and loft in response to repeated compression.

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Episode 55 | Managing Perspiration in Layering Systems: Wicking, Evaporation, and Ventilation

Ryan and Andrew discuss strategies and gear for managing perspiration in layering systems, including the processes of wicking, evaporation, and ventilation.

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Summary

In this SKILLS SHORT, Andrew and Ryan discuss strategies and gear for managing perspiration in layering systems, including the processes of wicking, evaporation, and ventilation.

Outline

  • Why is layering important?
  • What is wicking and is it good or bad?
  • Do I want my baselayer to wick in the winter?
  • Why is ventilation important in a rain jacket?
  • How can I manage effort and sweat production while backpacking?
  • Is wool warm when wet?
  • What is a good layering system for managing perspiration?

Resources

How to Subscribe

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Credits

Executive Producer - Backpacking Light; Show Director and Host - Ryan Jordan; Producer - Chase Jordan; Theme music: Look for Me in the Mountains written by Chris Cunningham and Ryan Jordan, performed by Chris Cunningham (acoustic guitar, lead and harmony vocals, harmonica), Chad Langford (upright bass), and Tom Murphy (mandolin), produced by Basecamp Studios in Bozeman, Montana.

Feedback / Tips / Questions

podcast@backpackinglight.com

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Disclosure

Sponsorship Policy: Backpacking Light does not accept compensation or donated/discounted products in exchange for product mentions or placements in editorial coverage, including any podcast episode content not excplicitly identified as sponsored content. Some (but not all) of the links in these show notes may be affiliate links. Learn more about affiliate commissions, influencer marketing, and our consumer advocacy work by reading our article Stop wasting money on gear.

Episode 54 | Foot Injuries, Training, and Rehabilitation for Hikers with John Zombro

Physical therapist and athletic performance coach John Zombro chats with Ryan and Andrew about foot injuries, training strategies, and rehabilitation in the context of hiking and long-distance backpacking.

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In this episode of the backpacking Light Podcast, we interview physical therapist and athletic performance coach John Zombro about foot health, footwear, injuries, rehabilitation, training, and more.

Also in this episode: shoes we are looking at in 2022, updates on the Backpacking Light Member Q and A series, and our favorite things we’ve published lately!

Outline

  • What’s new with the Backpacking Light crew?
  • Why is Training for the Uphill Athlete a book worth reading?
  • How can WHOOP straps help you track your diet?
  • Who is John Zombro?
  • What is plantar fasciitis?
  • What’s the difference between supination and pronation?
  • How can minimalist footwear help with plantar fasciitis?
  • What’s the minimum effective dose of foot training to allow for minimalist footwear?
  • Is there an advantage to weight training barefoot?
  • How to fix plantar fasciitis?
  • What is metatarsal strain?
  • Is there any way to train metatarsal soft tissue?
  • How much protein should athletes eat per day?
  • Why is eating well on trail important?
  • How can I fix a metatarsal strain?
  • What is a sprained ankle?
  • When should I ice an injury?
  • What are the mechanics of an ankle sprain?
  • Should I wear an ankle brace or knee brace?
  • Do over-ankle shoes protect the ankle?
  • How can lateral training improve hiking strength?
  • What is a stress fracture?
  • What are the most common locations for stress fractures?
  • How does ground reaction force affect hiking injuries?
  • Should I wear thick shoes while backpacking?
  • How can I train for posterior chain health?
  • What can I do to keep my feet strong?
  • What shoes are we looking into at Backpacking Light this year?
  • What’s a good zero-drop winter boot?
  • When is a good time to wear sandals while backpacking?
  • What’s new at Backpacking Light?

Resources

How to Subscribe

Apple Podcasts | Spotify | RSS

More Episodes

Backpacking Light Podcast Index

Credits

Executive Producer - Backpacking Light; Show Director and Host - Ryan Jordan; Producer - Chase Jordan; Theme music: Look for Me in the Mountains written by Chris Cunningham and Ryan Jordan, performed by Chris Cunningham (acoustic guitar, lead and harmony vocals, harmonica), Chad Langford (upright bass), and Tom Murphy (mandolin), produced by Basecamp Studios in Bozeman, Montana.

Feedback / Tips / Questions

podcast@backpackinglight.com

More Backpacking Light

Sign up for the Newsletter. Become a Backpacking Light Member.

Disclosure

Sponsorship Policy: Backpacking Light does not accept compensation or donated/discounted products in exchange for product mentions or placements in editorial coverage, including any podcast episode content not excplicitly identified as sponsored content. Some (but not all) of the links in these show notes may be affiliate links. Learn more about affiliate commissions, influencer marketing, and our consumer advocacy work by reading our article Stop wasting money on gear.

Walking the Great Rift Valley

Heat, army ants, and stupendous views await Jeff de Graffenried as he treks through South Luangwa National Park, Zambia.

When Lari Merritt, operator of Mutinondo Wilderness, asked me to join her and three friends on a 78-mile backpacking trip across the Great Rift Valley (GRV) in Zambia, how could I say no?

The timing was perfect at winter’s end with cool nights and pleasant days. The route started from the remote, 25K acre Mutinondo conservation area on the Machinga Escarpment and descended nearly 3,281 feet to the Luangwa River Valley and across South Luangwa National Park (SLNP).

The Landscape

Western Zambia’s Luangwa Valley is an ancient landscape formed by violent geologic events that ripped the earth apart to form a great chasm. The GRV is a series of faults and tears that extend from the Red Sea across East and Southern Africa forming some of the most dramatic landscapes and unique ecosystems on the continent.

Mutinondo is located on the edge of the GRV’s northwestern escarpment, the Muchinga Mountains. This extraordinary landscape is formed by exposed ancient granite “whalebacks” or inselbergs that continue northeast towards the Tanzanian border, spanning approximately 540 miles.

An expansive view of forest with mountains in the background
A view across the 10,000 ha wilderness area. Photo: Lari Merrett

The Mulungushi River forms the northwestern boundary of the SLNP and is fed by rivers from the Muchingas. As these streams slow, they deposit massive amounts of sediment across a valley floor filled with flat-topped acacia trees, elephants, big cats, and herds of antelope.

A granite plateau, rolling hills, old river banks, and oxbow lakes bounded by Miombo and Mopane woodlands, thick grasslands, and lush riverine forests form unique, world-renowned ecosystems.

My Gear

For this six-day trip, I carried my gear in a Hyperlite Mountain Gear Windrider 2400 pack. My 6 lbs of food weight included Mountain House dehydrated meals, muesli, trail mix, power bars, instant coffee, and tea bags. The total non-food weight was almost 11 lbs., including a 1 lb. utility K-bar 7 inch open blade knife that I attached to my pack for easy access and phone, camera, 20,000 mah power-bank and batteries. A pair of zip-off long pants, one long-sleeve shirt and Outdoor Research sleeves for sun and tsetse fly protection, two quick dry short-sleeve shirts, two pair of Darn Tough socks and liners, calf-high OR gaiters, and Oboz trail runners were my clothes. The gaiters kept the grass and grit out of my shoes, protected my legs, and reduced shoelace snags. Plus, they came in handy to sit on during lunch breaks and to place under my Thermarest Neoair Xlite sleeping pad to reduce the chance of puncture from nasty thorns. The total weight carried and worn was just under 21 lbs.

various ultralight backpacking gear spread out over the ground
My pack, cooking system, clothes bag, seat pad, shoes, etc.

The Trip

This was freedom – a true escape from the routine of everyday life. My senses opened to what was happening around me and my mind had time and space to notice the details – signs, sounds, and creatures – that are easily missed. Focusing on the flora, fauna, and the sights and sounds of the animals, I started to better understand what makes these complex ecosystems so special and to experience the Zambian wilderness in a natural way – to feel it and be part of it.

The Start (Days One and Two)

After obligatory beginning-of-the-adventure group photos, we set off. Following well-established trails, the rangers led us through the granite whalebacks and, within an hour, we were at the eastern Mutinondo boundary. There, we abandoned the known and stepped single file into the bush.

A group of people stand looking at the camera. (L to R) Jeff de Graffenried, Lari Merrett, Sabio Chanda. Wellis Chilekwa, Donald Lwaile, Sam Kango, Rokaya Ginwalla, Sally Bell Cross and Lucy Pieterse.
(L to R) Jeff de Graffenried, Lari Merrett, Sabio Chanda. Wellis Chilekwa, Donald Lwaile, Sam Kango, Rokaya Ginwalla, Sally Bell Cross and Lucy Pieterse.

Navigating through the waist-high grass and shrubs, we were slowly swallowed by the Central Zambezi Miombo Forest. Along the escarpment, rock-capped overhangs provided 180-degree views of endless uninterrupted forests that provoked silent contemplation of the earth’s beauty and vastness.

Though we caught only fleeting glimpses of a klipspringer and a few roan antelope, there were abundant signs bushbuck, bushpig, warthog, and porcupines. Relentless poaching has made the animals skittish and they quickly disappear.

At around 12.5 miles in, we dropped our packs next to a series of rapids and pools on the Wateshi River, soaked our feet, had a drink of cool water, and set up our first camp.

rapids cutting through a narrow gorge
The Watishi rapids at our first camp site.

After checking for crocodiles, we quickly bathed in the river. We admired our first sunset as we sat by the crackling fire, sipping tea and reflecting on the day’s adventures. With a full belly, I crawled into my sleeping bag and fell asleep listening to soothing sounds of the rapids, mesmerized by the vast night sky. This is malaria territory, so I tented a mosquito net to keep from getting that nasty illness. Again.

On day two, we set off before dawn after breaking camp and making coffee. Following the Wateshi downstream, we crossed at a shallow ford. We spotted the first evidence of illegal wildlife poaching at the top of the ridge on the other side. It was a wooden bushmeat drying rack made from trees cut nearby.

meat dries over a wooden rack suspended above a ditch filled with coals and ashes
A poachers drying rack: a fire dries buffalo and other illegally killed animal meat.

Again, we covered more than 12.5 miles before setting up our second camp inside a bend of an oxbow lake of the Mupamadzi River. Since it was dusk and prime time for hunting predators, we wasted no time settling in and adjusting our attitudes with tea and a meal. The crickets and fiery-necked nightjars sang us to sleep at night.

Midway (Days Three and Four)

Day three started with crossing the Mupamadzi River only a quarter-mile east from where we camped. Before crossing any river, it is imperative to check for elephants, African buffalo, and crocs, otherwise it could be your last day trekking.

a man wades across a river
Crossing the Mupamadzi River.

In the shallow, clear water on the other side and under the cover of tall grass, we took turns bathing in our own private spa! Afterward, we made breakfast and relaxed while our freshly washed clothes dried in the sun.

Clean, refreshed, and fed, we cheerfully turned south. But after several hours of steady walking in the intense sun, the cheer factor was decreasing, so we rested along a shady bank of a small, dry stream. There, we refilled bottles with filtered water from holes we dug in the sand.

two men on a riverbank. One is standing, the other is scooping water from a hole.
Sabio getting water from a hand dug hole in the stream bed.

Late that afternoon, we arrived at the Department of National Parks and Wildlife’s remote Bush Baby Ranger Camp and checked in with park authorities, then set up camp at a nearby stream.

Donning my headlamp, clearing a sleeping spot, and hanging my mosquito net, I picked my way through the brush to the small, narrow stream to bathe. Returning to camp clean, I ate and fell asleep under the stars, listening to the sounds of the evening and thinking of the day’s trek.

After an hour of deep sleep, I was awakened by a small sharp bite on my foot, then another on my leg, and another on my waist. Suddenly I was being bitten all over. I turned on my headlamp and jumped up. To my horror, army ants were everywhere! All my gear and sleeping area were being raided. I was covered in ants from head to toe and could even feel them crawling in my hair. Doing the “ant dance,” I jumped out from under the mosquito net and tore off my clothes. To hell with modesty, I had to get them off fast.

Seeing me dance around half-naked and yell in a staccato of shrieks and swears, the rangers came to my rescue. Working from experience, they quickly cleaned my gear and then spread campfire coals and ash around the campsite to prevent the ants from marching through the entire camp. Apparently, when foraging, army ants don’t like ash and won’t pass through it. As quickly as they arrived, the ants turned and marched on in a different direction. The rangers later told me that if I had not gotten up, the whole troop of ants would have covered me and tried to eat me alive like they do a caterpillar or anything else living that gets in their way. It took a long time for the sensation of ants crawling over my body to go away.

During the first half of Day 4, we walked 16 miles south toward the Luwi River, following a slight rise that divides it from a tributary. The midday break found us resting in the shade of large fig trees overlooking the river and enjoying the wild fruit with our lunch. From there we decided to take off our shoes and give our battered feet a revival, walking barefoot in the riverbed for the rest of the day, walled by angled and undulating orange sandstone.

hikers walking away from the camera barefoot in a shallow stream
Sometimes it is easier without shoes.
a group of hikers trek beneath a cliff face of red and white striped stone and mud
The river exposed the Karroo Supergroup, the most widespread stratigraphic unit in Southern Africa.

Camping that night near a three-way confluence on a narrow sugar-white sand bar, we had a front-row seat to the Southern Cross constellation and shooting stars, which diverted my thoughts from the lion, leopard, and elephant tracks that crisscrossed the river bottom around us.

a group of hikers lounge along a riverbank
Relaxing along the Luwi River’s bank.

The Home Stretch (Days Five and Six)

Late in the dry season, it gets hot and water becomes scarce, increasing chances of encountering wildlife around water sources. In the privacy and shade of the tall grass along the rivers, we stayed alert as we walked, preferring to avoid startling a resting animal. We didn’t want to be charged at close range (or any range).

At one point on day five, we emerged onto an exposed river bank to the surprise of a family of six elephants across the river. Within seconds, the elephants trumpeted, flared their ears, and rushed away to the protection of the forest. Even though we were more than 50 yards away and on the other side of a river, they weren’t waiting around to determine our intentions. Similarly, other animals (hartebeest, buffalo, impala, puku) noticed us and disappeared quickly. Humans are dangerous.

a herd of buffalo looking at the camera
African buffalo watching us closely as we pass.

We camped on a tree-lined high point with a good view across the braided river. A spectacular burnt-orange sunset silhouetted elephants crossing far upstream and impala casually munching away on the opposite bank. The deep roar of lions calling into the night reminded us that this is their territory and we are just visitors.

an orange sunset over a river and trees
Sunset over the Luwi River

The last day was arduous. It was hot (105 °F) in the Luangwa Valley and we had a long way to go. Shade was sparse so we walked fast. Each hour we took a break to rest and get out of the intense tropical sun. The gnats and tsetse flies were swarming so bad that I had to cover my head and face with my bandana to get a break, and leaned back on my pack to “rest my eyes.”

a person finding some shade under a tree and with a shirt over their head
Lari resting and trying to keep the insects away.

As we passed the 1,500-year-old Big Baobab tree, a well-known park landmark, we knew we were close to our destination. Baobab trees are respected throughout Africa for their many uses, age, shape, and nutritious fruit. The Vitamin C-loaded fruit fueled us forward.

four people stand under an ancient tree
(L to R) Sabio, Rokaya, Lari, and Jeff at the Big Baobob.

With two coolers of cold drinks waiting, our friend and long-time park guide, Jason Alphonse, was an oasis. Dropping our packs, we leaned against his Landcruiser and cooled down with a cold beverage before the last few miles. We were in the heart of the park and surrounded by abundant wildlife, including at least two prides of lions, leopards, wild dogs, hyena, elephants, buffalo, giraffe, zebra, and various antelope. We hurried thought the last few kilometers (1-2 mi.) to the Luangwa River and the SLNP main gate. A massive herd of buffalo, highlighted by zebra, impala, hippos, and elephants, bid us farewell.

four zebra in a field eating some grass
Zebra having a late afternoon munch.
a man holding the head of a buffalo in front of his own head
Wellis having some fun along the way.

This rare opportunity to walk across one of the best national parks in Africa tops my list of life highlights. Whether navigating our way through the Machinga Escarpment, pushing our way through elephant grass twice as high as a person, or digging for fresh water, I felt a sense of achievement that only comes from completing a long, hard trek.

The vast landscapes and roaring lions at sundown were fantastic, but the shared memories and friends I made during the trip way will stay with me forever.

Related Content

DISCLOSURE (Updated April 9, 2024)

  • Backpacking Light does not accept compensation or donated/discounted products in exchange for product mentions or placements in editorial coverage. Some (but not all) of the links in this review may be affiliate links. If you click on one of these links and visit one of our affiliate partners (usually a retailer site), and subsequently place an order with that retailer, we receive a commission on your entire order, which varies between 3% and 15% of the purchase price. Affiliate commissions represent less than 15% of Backpacking Light's gross revenue. More than 70% of our revenue comes from Membership Fees. So if you'd really like to support our work, don't buy gear you don't need - support our consumer advocacy work and become a Member instead. Learn more about affiliate commissions, influencer marketing, and our consumer advocacy work by reading our article Stop wasting money on gear.

Freeze-Drying Your Own Backpacking Meals: How to Eat Your Favorite Town Food on the Trail

In this freeze-drying installment, we discuss the history of freeze-drying and experiment with using a freeze dryer to prepare our favorite take-out town meal for enjoyment in the backcountry.

Introduction

People have been drying food for tens, perhaps hundreds of thousands of years. The reasons are straightforward and well-known – dried food is lighter and keeps longer.

Drying food to sustain us on long journeys is an ancient tradition. When you load your pack with dried food and hit the trail, you are just the latest link in a long chain of humans: nomads who are coming into the country, going down the road feeling bad, heading for that Big Rock Candy Mountain.

The earliest food drying technology – cutting food into small pieces and laying it out in the sun – costs almost nothing. It also works pretty well if you don’t mind entertaining the local fly population.

Simple dehydrators, consisting of racks, a fan, and a heating element (and a cover to keep the flies off) are a step up. They deserve a place in every hiker’s gear depot. You can and should use these effective tools to dry a wide variety of foods. I’ve written about why to dehydrate your own food and how to dehydrate food for backpacking previously.

sliced tomatoes laid out on a dehydration rack
Simple dehydrators are a good way to prepare backpacking food.

Heat-assisted dehydration has its limitations though. Many foods – meats, eggs, various sauces – simply don’t rehydrate well. Even for those that do, some loss of flavor and nutrition is unavoidable during the drying process.

That’s why nearly all of us have used freeze-dried meals at some point during our hiking careers. Freeze-dried foods rehydrate readily, preserve taste and nutrition, weigh little, and store well for very long periods. However, freeze-dried backpacking meals are also somewhat expensive and available only as ready-made products through retailers. The quality and variety of retail freeze-dried foods have improved dramatically in the last decade or two. But you are still stuck with the choices that others have made for you. These choices are aimed at pleasing a mass or niche market in order to make a profit, they are not choices aimed at pleasing you.

Backpacking Light owns a Harvest Right Home Freeze-Dryer unit. Ryan Jordan asked if I would be willing to use it and write a series of articles for Backpacking Light. (The fact that they were moving into a smaller space and no longer had a place for it may have had something to do with this assignment!)

a large grey machine, somewhat like a front loading washing machine, with racks and trays on the inside.
The Harvest Right Home Freeze Dryer

In this first installment, I’ll tell you a bit about the history and general principles of freeze-drying foods. Each article will finish with a recipe and review of something I’ve freeze-dried. I am definitely up for challenges and testing new ideas. So if you’ve got an idea for something you’d like to see tested, hit me up in the comments section and I will see what I can do and report back.

History of Freeze-drying

Drying food is the process of reducing its water content. The fundamental difference between freeze-drying and dehydration is that during freeze-drying, water is removed by sublimating ice in a vacuum, and during dehydration, water is removed by evaporation of liquid water via heat.

This process has a surprisingly ancient history. Inca peoples, who invented the potato, also invented a low-tech method of freeze-drying. Potatoes were left out on freezing nights; ice and water would be squeezed out of them during the day. After a few cycles, they had freeze-dried potatoes (a dish called chuño) that stored very well.

Modern technology only began to improve on this process in the 1890s with the use of vacuum pumps and mechanical refrigeration. However, freeze-drying remained a fairly obscure niche technology until the 1950s and 1960s, when it began to be applied to pharmaceuticals and food preservation. Military contracts to Rich-Moor and Mountain House gave these companies a start in using freeze-drying for food preservation. Soon they began marketing freeze-dried meals to a peculiar subset of civilians who thought that carrying a heavy pack all day and sleeping on the ground at night was good fun.

Fundamentals

Although the meals are much better now than in the 60s (trust me on this), the fundamentals of freeze-drying have not changed. The basics are:

  1. Food is deep-frozen, typically to -20 °F (-30 °C) or so.
  2. A high vacuum is applied, causing bulk water to sublimate (that is, evaporate directly from its solid form without melting).
  3. While still under vacuum, the food is gently heated, removing additional tightly-bound water.

Key Benefits of Freeze-Drying:

  • Because the food is dehydrated while frozen, it retains its form and volume, rather than collapsing as is the case with heat-assisted dehydration. Pores and interstitial spaces remain open, letting water back in during the rehydration process.
  • Evaporation/sublimation takes place at low temperatures, thus volatile compounds are retained, preserving aroma and flavors.
  • Oxygen is removed and the food is kept cold, thus oxidative damage is minimized, preserving color, flavor, and nutrition.

Those are the basics. I’ll expand on them a bit more in future articles.

Recipe: Sesame Tofu

This first recipe isn’t really a recipe. After I had done a couple of runs in the Harvest Right freeze-dryer with good results, it occurred to me to simply order some favorite take-out food and dry it.

Chez Thuy is a nearby Vietnamese diner that has been in business here (Boulder, Colorado) for over 30 years. Although my family members aren’t really tofu-eaters, we love the sesame tofu at Chez Thuy and always get it when ordering from them. I thought it would be pretty great to eat one of my favorite take-out dishes while hiking the PCT this summer.

The dish consists of broccoli stir-fried in sesame sauce, along with fried breaded tofu and crispy noodles. I cut the larger veggie and tofu chunks into half-inch pieces to facilitate drying and rehydration and popped the dish into the freeze-dryer. It looked like this going in:

asian food spread out on a tray, ready to slide into a freeze-dryer
Broccoli stir-fried in sesame sauce with fried breaded tofu and crispy noodles – one of my favorite dishes from a local restaurant.

And a month later like this, about to go down:

a pot with asian food in it and a green spoon sticking out of it.
My sesame tofu meal rehydrated on trail. My experiment of freeze-drying restaurant food was a huge success.

It did not disappoint, and this was a good thing. I was not in a good mental space to be handling disappointment. Hiking the NorCal – Oregon PCT this summer was mostly awful. There were far too many days of brutal heat, long water carries, and choking smoke. Being able to chow down on a first-class meal did not make everything all better, but it put a good end to a couple of really miserable days.

The flavors were there in all their glory. I held the crispy noodles back while rehydrating so that they retained their crunch. The biggest and most pleasant surprise was that the tofu was actually improved by the freeze-drying process – it was much less slimy, and the breading even retained its texture fairly well. This experiment was a total success, a 10 out of 10, and I will freeze-dry this again.

The possibilities here are nearly unlimited. Every long-distance hiker who gags down a pot of instant mashed potatoes begins to dream of town food. Freeze-drying take-out food lets you eat like a town stop glutton while you are still on the trail. That’s what I call winning.

In the next installment, I’ll go into more detail regarding the principles and practice of freeze-drying, and share the results of other culinary experiments. Talk to you then.

Learn More

Here’s a link to the Harvest Right Freeze Dryer model used in this series.


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