The North Face Endurance Challenge DC

The North Face Endurance Challenge returns to Algonkian Regional Park, Great Falls Park and the Potomac Heritage Trail again in 2015. The course keeps runners on their toes with ever-changing terrain. Overall, the course consists of 50% single-track, 30% dirt or gravel double-track, 10% gravel carriage road and 10% paved road. Events include 5K, 10K, Half Marathon on Sunday and 50 Mile, 50K, Marathon and Marathon Relay on Saturday.