I just spent 10 days in the Utah mountains. I got packed in by horse so could take a bit of extra gear. I alternated between Ascent and Mountain pants. In all but the warmest weather, I found I liked the Mountain pants and their wonderful built in knee pads just a bit better. They are a bit heavier, but still stretch with you as you climb. I have a set of Timberline, but they will come out for sheep hunts or Mountain Lion later this year. I believe the waterproof knee and butt will come in handy.