http://cloudbaseimaging.blogspot.com/2012/09/wyoming-jackson.html

The peak above the top of the tram is 11,000 feet. The morning air
was completely still, which was completely uncharacteristic for the high
altitude setting. I humped my glider up the last couple hundred feet and rigged
on the west facing slope. It was going to be a good soaring day, but we had to
make it to Wind River Range before dark so I launched with the first light
cycle. Having only flown in Florida and one Colorado flight in early summer,
launching in the thin air was daunting. I found the steepest slope I could and
committed to run to the bottom of the mountain if I had to. In 5 steps I was
off, with no drama. I swooped my way down the mountain, while resisting the
temptation to buzz the tram car going up as I was going down.