I really like mountains, and I love to trek in them too.
This summer I went to Italy, the dolomites and did the classic treks around Tre Cime, up to Flanes and around the lakes.
I brought my M10 and three lenses, 21mm/3.4, 28mm/2 and 75mm/2, a perfect combo in a Billingham Hadley Small, weighing around 3 kilos, fullframe with the best glass in the world.
I use a Visoflex viewfinder for the 21mm (almost) and sometimes for the other 2 lenses.
When you shoot in the wilderness, superwideangle can often be a little dull, because of the perspective being flatten out of the distances.
It's important to bring in som foreground like the rocks in image no. 1, and like the trees in image no. 2, both taken with my 21mm.
At Tre Cime, i tried to move in really close, to avoid the distance/perspective issue, but of course, then you cant frame the whole mountain in one shot.
Instead I made 3 overlapping pictures and stitched them in Lightroom afterwards, bringing a better balance between foreground and background.
What do you think?