U.S. Highway 212-- aka, the Beartooth Highway-- connects Red Lodge and Cooke City, Montana, and its nearly 11,000-foot peak can make it (pardon the pun) a bear to cross when the weather gets snowy. But this zigzagging route cuts through the Custer National Forest and Shoshone National Forest, offering some of the most eye-opening vistas on the planet. Perhaps the best part of Beartooth Highway is that when you're done riding its challenging roads, it will lead you right to the northeast gateway of Yellowstone National Park. But remember to
stay warm when you ride here: it can get seriously cold in these parts.