I am going on a ten-day trip to Glacier National park and Yellowstone in early August and am on the hunt for sweat-wicking bottoms with elastic waistbands. I can handle high-waisted leggings but zipper flys and buttons are out especially in higher rises. I also have a preference for longer bottoms for sun-protection although this is not a hard requirement.

I tried REI but came out empty-handed. Is Athleta still where I should look next? Any other options I should check out?