The National Capital 20 Miler serves as Washington, DC’s premier fall marathon tune-up event. Runners can tackle either a 20-mile or 5-mile distance on the flat and fast C&O Towpath. This out-and-back course is designed for efficiency, featuring regular water and nutrition support to keep you fueled. Participants receive race swag, and the event offers competitive prize money for top finishers in both distances. With a wide range of age group awards, this race provides a great opportunity for runners of all levels to test their fitness.



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Carderock Recreation Area
Potomac, MD 20854