Now for the hard part-moving below 10 lbs for 6 days in Yellowstone, August 20

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You will probably need a warmer sleeping pad at 15-20F than just a NeoAir. I would bring the NeoAir regular instead of the large, and take the extra 5 oz in the form of a 1/4" or 3/8" Thinlight. The extra warmth will add more comfort than the bigger pad. Also, you could try blowing it up all the way for more insulation even if it's a little less comfortable.

Hat – Is a 1.1 oz hat warm enough for you in a quilt at 15F? My 200 weight polartec hat is closer to 2 oz and is what I would want in those temps.

Underwear – I would nix the extra pair and just sleep in your base layer bottoms. The pair you wore during the day will be dry by morning.

Emergency blanket – If you are worried about being cold, it adds a big safety margin. It would be very effective under your quilt both as a radiant barrier and a VBL. It would make the difference between being truly miserable and only somewhat uncomfortable if it was significantly colder than you expected one night.

Overall your list is great. And miles away from 22 lbs! You are in the realm of "fine tuning" now.

Andrew

+1 on Andrew's advice regarding the pad, base layer sleeping, and hat. I'm 6'1"+ and use a medium Neo with the Montbell pillow at the end and sleep well. When on my side (I toss&turn a lot) I can move the pillow on top of the pad and curl up slightly. Perfect comfort – your setup should be similar, so definitely skip the Large Neo unless the width is a necessity.

I carry one patch from the Neo repair kit "just in case". Don't wanna be without my Neo!

The Foster's setup is definitely lighter, but the TiTri sure is sweet. If lightness is THE goal, then buy the Foster's and make me a deal on the TiTri. :) However, if the rest of your kit makes you happy, then don't part with the TiTri's versatility. Not to mention the Evernew pot is great, too.

ULA's CDT is a great, lighter option to your pack, given your low base weight.

Hat: I now wear a Tilley AirFlo and like the wide brim. Prior to that I was happy w/my light Nike "baseball" style hat and my bandanna underneath (hanging out the back) to protect my neck & ears from the sun. Soaking the bandanna in a stream provides great cooling when it's hot.

Think cold & damp with wind (flavored with smoke from local wildfires) and chances of patchy sunlight. You will have rain and lots of water to slog through. Perfect neighborhood for the Douglas firs. If you are very lucky the weather could be mild & dry but don't bet on that lasting for more than half a day.
Take trail runners, gaiters and thin socks: they will dry out faster than boots.
Keep the emergency blanket.
Line your pack with a trash compactor bag.
Beanie/stocking cap? You'll need it at night and will most likely end up wearing it during the day.
Will be worthwhile to learn more about animal tracks and droppings because you will see lots of both.
Speaking of droppings: carry more than a few anti-diarrheal pills.
Take lots of pictures!

I live right near yellowstone, and I've spent a LOT of time there. And August is magical!

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Stuff sack for Sleeping bag — NIX —

Stuff sack-Clothing — NIX —

Bear bag — NIX — all the established campsites in YELLOWSTONE have bear hang bars. Just take string and a stuff sack for the food. Easy.

Underwear (carried) — NIX — No need, just wear on pair for the whole trip.

Rain Gear – Driducks rain suit – Take the jacket, NIX the pants. This is an awesome raincoat, but be careful, it tares easy!

Platypus 3L — NIX — THere is water EVERYWHERE in yellowstone, you'll NEVER need this much capacity.

Purification bottle – what is this????

Are you solo camping?, if so a 0.9 liter pot is too big for just one, get a smaller pot. Are you planning to cook with wood under the Caldera Ti Tri Sidewinder? Or use alcohol?

Headlamp – 3.2 oz is too much, a petzl e+lite is plenty.

Single-edge razor blade in paper sheath – You wrote this just to warm my heart!

Electrolyte/energy – Clif Shot Bloks (2 servings/pkg, 2 pkg/day) – this is part of your food, so no need to call it something separate.

Fire source / tinder – You have alcohol, so no need. — NIX —

Toilet paper — NIX —

Boots – 49 oz??? Good grief, those are TRADITIONAL hiking boots!! Get some nylon running shoes!!!

Water shoes — NIX — Just walk thru the water with your shoes (your new light shoes, DON"T take 49 oz footwear!!!) Ducks have wet feet all the time, and they do fine.

Emergency ZIP ties — NIX —

Emergency calories/electrolytes — No need for "emergency" food, just add this to the food collumn in the spreadsheet.

Emergency shelter – — NIX —

Emergency kit container – What is this?

Bandanna – you have a pack towel AND a bandana, WHY??? Take the lighter option, or cut your bandana down.

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ADD :
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A) BEAR SPRAY WITH A HOLSTER! Don't carry this on your back or inside your pack!

B) Waterproof the pack with a 2.2 oz hefty trash COMPACTOR bag. 1 is all you need.

Curtis wrote:
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"I'm not quite ready to leave my boots behind in favor of thin socks and trail runners that can dry out on the trail."

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Mike replies:
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What? Sure you are! This is the easiest thing imaginable. You won't be in the east coat. Almost all of Yellowstone is well above 9,000 feet and august is magically dry, with like 0% humidity. You'll be fie. Just walk right thru those beautiful (and often warm) creeks! Trust me. Really. Ditch your big boots.

The whole reason I enjoy hiking is because I do it WITHOUT BIG BOOTS!

Actually you've said that you enjoy hiking because you do it with a light pack. :P

He could also use lighter weight mids for shoes. That or he could do his own thing and as long as that's not bothering him have fun.

I echo most of Mike's feedback, especially insofar as footwear is concerned. Changing shoes back and forth is such a hassle.

With your shelter and sleeping bag I think the space blanket is pretty pointless. And from a cal/oz standpoint Gu is a pretty inefficient source for food. Just bring one more Snickers.

I'd want a more substantial puffy layer, with a hood.

The trails in the Bechler area are mostly very well maintained and trodden. Gaiters are definitely optional.

You could ditch the Sublite for a tarp.

If you go in early August, you might want a headnet. The skeeters were still out in Yellowstone that time last year.

If you're going to the Bechler, I'd highly recommend some fly fishing gear. Excellent fishing.

Thank you all for your time spent reviewing–this really helps!
Andrew:
I think I'm going to get a heavier hat just in case, the extra underwear is now gone, and the Reg NeoAir is in the bag.

Todd:
I hate having my arms on the ground, but as I think about it, I toss and turn and sleep on my side as well, so I never really use the full extent of the NeoAir regular. I wonder if I could even go smaller?

I forgot that the Keg doesn't do the multi-fuel. In the Teton's there weren't any fires allowed but that's not the case in Yellowstone. The 900ml pot is the smallest Sidewinder setup available that fits completely inside the pot–anything else and you need a caddy that adds unnecessary weight. I've wondered if they could make a Tyvek sleeve instead of the caddy.

I'll take a look at the CDT.

Mike C wrote:
>>Single-edge razor blade in paper sheath – You wrote this just to warm my heart!
You caught me! Actually it was your gear list I stole it from!

I love your ruthlessness with the gear lists. Brutal, but spot on the mark.

Regarding stuff sacks–I'm at 1.9 oz and my bag and clothing are dry, the rest I don't really care if it gets a bit wet, and I save .3 oz over a full-on trash compactor bag liner. Or is that flawed reasoning?

Just found the e+lite today–that is one of my next purchases.

The emergency kit container is the belt pack that contains all the crap I carry. It weighs too much and I'm hopeless when it comes to sewing what should be a really simple replacement…

Adding the bearspray back!

With the shoes, I just hate the thought of squishing around and blistering in soggy shoes. Ugh. Perhaps a topic in and of itself. Maybe I'll try it locally before committing fully this summer!

David:
Can you recommend a light headnet?
I'd love nothing more than to fish along the way and am certainly willing to release, but One of the things I've wrestled with is with alcohol stoves and titanium pots, how in the world can I cook fish?

Thank you all again for the recommendations!

I teach ultra-light hiking, and I have for over 6 years. When I get to the first wet stream crossing, I just walk into the water, and invite EVERY team-member to walk in with me. We all stand in the water, and I explain how this simplifies EVERYTHING.

No body changes shoes, and everyone has wet nylon lightweight hikers.

Then, at the next crossing, everyone excitedly walks into the water, they learn to enjoy it.

The ONLY people who get bad blisters are people in BIG BOOTS. From my experience (and I'm serious) hiking in wet shoes is a PREVENTION TOOL as blister prevention.

And if it's raining, your feet will be wet anyway.

DO NOT take boots, DO NOT take river crossing slippers! You will LOVE IT!

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Yes – Bear spray is no joke in yellowstone. Wear it in a holster at your hip.

I still dont't get what an "emergency kit container" is. Why can't you put your items in a ziploc baggie? (or, better yet, a USED ziploc baggie)

August has minimal bugs, don't worry. Take a head-net and you might use it at dusk. Maybe. It makes a nice stuff sack.

The full trash COMPACTOR bag makes everything VERY simple. It is much easier to get stuff in and out of your pack if nothing (except food and cook-gear) is in a stuff sack.

Curtis, most of the sites in the Bechler region allow wood burning, some do not. Worth checking against your plan.

The shoe issue is psychological. Having wet feet really isn't a big deal.

The BPL headnet is excellent, but it is often out of stock. Sea to Summit makes a headnet that looks like it'd do just fine. REI sells it.

You can always cut fish into chunks, poach them, and then flake the meat out onto your rice, tortilla, etc. Or roast them over your fire on a stick or in foil w/ olive oil. The bearanoid worry that this will bring about undue ursine attention. I do it anyway, and the Bechler has the smallest GRIZ population of any part of Yellowstone.

You'll need a YNP fishing license, and to read the particular rules about catch and release in different drainages in the park.