the sun sets on a valley in yellowstone national park.

20130531agrandteton sun sets valley yellowstone national cloulds cldouds clouds evening grand teton grizzly bears wolves bison elk tourists geysers animals unesco heritage ecosystem ecosystem temperate subalpine forest mountain ranges rocky range canyons volcanic rivers canyon yellowstone north america southwestern ancient volcano america wildlife species mammals gray wolf lynx bears buffalo black bear elk moose deer white-tailed goat pronghorn bighorn animal public lands wolves yellowstone coyote park#39aph39#s top canine predator animals fish wolf packs wyoming montana idaho endangered sunset