Yeah, everything is harder up there. I used to live there, and have some land (outside of the elk-hunting unit) at 10,000 feet. I've been backpacking countless times up to almost 12,000 feet, and climbed a few 14ers. You can't go as fast for as long as nearer to sea level. For part of the trip, we may hunt bear on my land about 20 miles away.
