Sports
The North Face Endurance Challenge
The North Face® Endurance Challenge returns to Algonkian Regional Park, Great Falls Park and the Potomac Heritage Trail again in 2011. The course keeps runners on their toes with ever-changing terrain. Overall, it consists of 50% singletrack, 30% dirt or gravel doubletrack, 10% gravel carriage road and 10% paved road.
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