Go north from Jackson,WY, through the North Entrance to Grand Teton National Park it's on your left you can't miss it.
I took this with a Canon 70-200mm 2.8L IS and Fujichrome Velvia in a Canon EOS 1v. I also had a polarizer on the lens, using a Manfrotto/Bogen 3221WN tripod. I got lucky, and got two pictures of this sunset. The first picture I took of Mt. Moran, and the second picture was the last looking north of Mt. Moran about 15 minutes later. My girlfriend and I were running around the entire time getting the tripod and running back to the canoe for more film. I was metering off the water, and the light on the clouds just above the mountains, and trying to split the difference. These are how the slides scanned with a little bit of unsharp mask.