Dirty Bismark (CO)

Boulder County, Colorado, United States

15.2 miles (24.5 km) · 1,004 ft elevation gain · Loop · trail · Route

Dirty Bismark (CO) is a 15.2-mile loop route in Boulder County, Colorado, United States, gaining 973 feet of elevation. The route follows a up-and-over elevation profile. The terrain breaks into 5 distinct sections including 1 significant climb. The longest climb covers 2.9 miles gaining 399 feet at an average 2.6% grade. Nearly the entire route is runnable at a steady effort. The route opens with mixed terrain and finishes with a descent.