Beartooth Highway

The Beartooth Highway is an All-American Road on a section of U.S. Route 212 in Montana and Wyoming between Red Lodge and the Northeast entrance of Yellowstone National Park, passing over the Beartooth Pass in Wyoming at 10,947 feet above sea level. It has been called "the most beautiful drive in America," by late CBS correspondent Charles Kuralt. Because of heavy snowfall at the top, the pass is usually open each year only from mid May through mid October, weather conditions permitting.

Source: Wikipedia