Winter layering suggestions

Where are you going? How cold will it be?

Above about 25 F or so I just hike with base layer plus jacket. Anything more I'll sweat. If it's really cold maybe add a fleece mid layer.

At camp I wear the same base layer and jacket and add an insulated layer. Synthetic if it's not so cold. Down if it's colder. Thicker down if really cold.

Insulation – synthetic or down – is a lot warmer for the weight than added layers

This is inconsistent with conventional idea of having layers, but that weighs a little more. Just one way to do it.

What conditions?

I would put my down jacket over my windshirt, but more for convenience than science. If you're cold in camp, put on everything— can't keep you warm sitting in your pack :)

Any rain gear on your list?

You can wear R1 as a base or mid layer. A base layer should fit to give full skin contact for best moisture transfer. Note that Patagonia has made tighter fitting tops like the R1 Flash as a super base layer and more sweater-like jackets, hoodies and vests to wear as mid layers. I'm more likely to wear R1 next to my skin if my base layer is wet or being laundered. There are lots of weights for Power Dry base layers. I try to tune in my base layer weight so I am comfortable with base layer and shell when active.

Vests can be handy for mid layer and puffies too. I have an R1vest that is handy and I use Micro Puff and Thermoball vests for layering too. They give good core insulation while reducing bulk and weight.

Soft shell pants rock for cold/wet weather. Can't stand the tops. I like Silver Ridge Zip offs for warmer weather, but they don't do much when it's cold. If I'm going to be out all day in wet weather, I just layer up light long johns and rain pants– that works great.

Don't forget to tune up gloves, cap, balaclava and socks. Those accessories make cold weather camping much more enjoyable.

Sorry I probably should have listed the conditions

Based on the time of year and area, I expect it to top out at 65F around lunch and drop down to 50F at night. Coldest it will get is probably 41 but I'd probably be asleep by then. Keeping in mind I'm in Australia so it never really gets that cold in most places.

I have rain gear which I didn't think of bringing, my Houdini has some DWR treatment but won't hold up to any real rain, so I'm just kind of crossing my fingers here. Will need to pick up some gloves too I guess, forgot about how cold my hands get!

I'm not sure about how the R1 fits either, but my MEC T3 fits pretty damn tight, when I pull it over a T-shirt I spend a good 5 minutes just trying to wriggle my sleeves back into place to get comfortable.

41 F, sounds like summer here : )

seems like you have more stuff than necesary for that temp, at least if you're trying to reduce weight

I agree with Jerry. Unless you run unusually cold, you could get rid of either the silkweight baselayer, or get rid of the MEC T3. Likely don't need them both while active, and with a down jacket wouldn't even need either purely for warmth reasons (though having a baselayer of some kind is good to protect the jacket from oils etc).

Overall the MEC shirt will be more versatile, with a greater temp comfort range.

Narikki, those conditions are not winter, just autumn- like. What you have is probably OK.

Don't forget a stocking cap for sleeping and heavier "sleep socks".
Light fleece gloves may also be nice in the early mornings.

Well, nearly Summer. Snoqualmie Pass is where the PCT crosses I-90, east of Seattle, elevation 3022'.

Forecast for the next ten days. Sound familiar?

The T3 shirt sounds awfully tight.

After looking at those temps, I think I'm probably OK haha. Can't imagine what Winter must be like for you guys on the trail.

And yeah the T3 is way too tight. I'm have a more athletic build so the arms and torso are especially tight, but if I go up to a Medium (currently S), it gets a bit lengthy for me. Short person problems.