Nathaniel, my weight and height are almost identical. I'm too am in good shape but I will soon be 60 years old so muscle is a bit harder to develop. Since I have a Colorado elk hunt planned for later this year (altitudes from 7,500 to 9,500 ft.), I too am interested in the responses you will get. Myself and a couple of guys I hunt with are planning a several backpacking hikes to a rocky, hilly area near by to help get in shape.