Carderock Recreation Area, Potomac MD
Saturday, October 3rd, 2026
The National Capital 20 Miler is Washington, DC’s premier fall marathon tune-up race. Taking place on the C&O Towpath, the race offers runners a flat, fast out-and-back course with water and nutrition support at regular intervals. Runners may choose the 20 Miler or 5 Miler option. All runners receive race swag.
For more details about the race, please visit National Capital 20 Miler and Janet Braunstein 5 Miler.
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