More than a mile above sea level. Boiled foods take a tad longer to cook You get out of breath a little sooner when under exhertion. You exhale twice as much moisture as at sea level, which means you need to drink more water, or you may suffer heat exhaustion. You sunburn a little more easily, the atmosphere is thinner, and more sun rays come through. This is over a mile high.
Temperatures are generally lower, but when it does heat up it seems to do it very suddenly.
Shorter growing season. Gardening can be done, but requires some adaptation and persistence. Not just for hunting. This area is classed as Alpine Desert . It is by no means barren.