Thanks for the reply. My Sorels are actually very comfortable for snowshoeing and don't really fit like typical pac boots, I can dial them in pretty well using the laces and Achilles strap and get almost no heel lift. The heel cup is a little bit wider than my heel and there's a little bit of slop in the ankle, but I may try some Super Feet insoles because they worked great in my Asolos. The ankle is what I'm most concerned with for the mountain(s) - I'll just be snowshoeing and maybe using spikes in places with more ice than snow, no technical climbing. My only concern is the possibility of a rolled ankle, I've hiked and snowshoed in these for years but not on mountains, not even the itty-bitty ones like in my list.