Just getting ready to move through the high country will get you in good shape! It is a bit of a challenge even for those of us who live 5,000 ft above sea level or more. The higher you go, the thinner the air, like about 50% here on the Front Range to about 70% at 9,000-10,000 ft! So less oxygen and harder to breathe efficiently. Doesn't affect younger folks as much if they are in good shape. We mature
folks tend to take it very easy when we go higher! Clint looks like he dropped about 50#! For this adventure!
Hawkdancer