31.1 and 26.2 mile loop in the San Juan Mountains of Colorado. The course follows the "Alpine Loop" jeep roads past the ghost mining towns of Howardsville, Eureka, Animas Forks and Gladstone. High point is California Pass at 12,930 feet!
Loop starting/finishing in Silverton for the marathon. Loop starting near Gladstone and finishing in Silverton for the 50k. Follows Alpine Loop mining road counter-clockwise linking historic mining ghost towns, Howardsville, Eureka, Animas Forks & Gladstone. High point is 12,930 ft atop California Pass. Low point is Silverton at 9,318ft. Total vertical gain is 3,800 for the marathon and 4,100 for the 50k.