Founders Half Marathon
Race Day Weather
Cool morning, steady conditions
Runners will face a temperature range from 35°F at the start to 47°F by the finish, with light winds at 6 mph from the W. Humidity will be moderate at 57%, making for comfortable running conditions. With a slight chance of light rain, hydration should be prioritized, but overall, runners can maintain their pace throughout.
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Race Info
The Founders Half Marathon is a 13.1-mile out-and-back race in Potomac, Maryland, organized by the DC Road Runners Club. The course runs along the C&O Canal Towpath from the Carderock Recreation Area, with two water stops at Lock 10 and Lock 6 passed twice each. It is race #2 of DCRRC's winter Snowball Series and was known as the Gar Williams Half Marathon before 2025, named for a past president of the club and of the Road Runners Club of America.
