The Grand Teton mountain range near Jackson, WY: in the fall of 2011, I took the aerial tram up to Rendezvous mountain. Once there at over 12,000 ft I walked around taking in the views. The following photo shows what it looks like when you can see the clouds juxtaposed to the mountains:
The walk down was 7 miles in length. There were not many people that day, and I didn’t have enough time, so I hopped on the tram for the return trip.