San Juan Skyway
Most of U.S. 550 in Colorado is two-lane mountainous highway. It is the only north-south U.S. Highway in Colorado which runs west of the Continental Divide. The route travels north through the San Juan Mountains. The Million Dollar Highway stretches for about 25 miles in western Colorado and follows the route of U.S. 550 between Silverton and Ouray, Colorado. It is part of the San Juan Skyway Scenic Byway.