Alpine Loop

The Alpine Loop strings together three of Colorado’s most notorious mining passes — Engineer, Cinnamon, and Imogene — in a 63-mile circuit that climbs above treeline into mining ghost town territory. Starting from any of three Victorian mining towns (Silverton, Ouray, or Lake City), the route crosses Engineer Pass at 12,800 feet, where the remains of mining operations still litter the alpine tundra. Imogene Pass pushes even higher at 13,114 feet, making it one of the highest vehicle-accessible passes in North America.

This is moderate to difficult 4WD driving that demands respect for altitude and weather. Stock high-clearance vehicles can handle most sections, but some optional spurs require true 4×4 capability. Weather changes fast above treeline — afternoon thunderstorms can turn dirt roads into slick nightmares. July through September offers the only reliable window when passes stay snow-free. No permits needed, but fuel up in town and carry emergency gear. The payoff is mining history frozen in time and views that justify every steep switchback.