12 Miles 1:29:19 7:26 average per mile 6:45 am) Was actually warm. wore short sleeve & shorts Elevation Gain: 1,043 ft Elevation Loss: 1,049 ft Min Elevation: 9,896 ft Max Elevation: 10,631 ft HR average 134 Max HR 146 Did the entire Mineral Belt Trail loop. It's 11.6 miles I did a bit extra to get 12. First 5 miles was hard not only the altitude but it seemed to be slightly uphill. I had to stop a few times just to catch my breath. I wore my HR monitor since I was curious what it would be at 10,000 + ft. I was surprised how low it was. Even though my breathing was like I was doing a sprint my HR was very low.