Potomac River Run Marathon (Fall)
Carderock, MD, USA · October 17, 2026
Race Day Weather
52°at start
67° high
Light
Dry
Mild conditions, gradual warming
Runners will face a starting temperature of 52°F, rising to 66°F by the end. Winds will be light at 8 mph from the WNW, with occasional gusts up to 23 mph. Given the humidity at 60%, it’s advisable to start conservatively and adjust pacing as temperatures rise.
Race day forecast available in 30 days
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FAQ
When is the 2026 Potomac River Run Marathon (Fall)?
The 2026 Potomac River Run Marathon (Fall) will be held on Saturday October 17, 2026.
Is the Potomac River Run Marathon (Fall) a Boston Marathon Qualifier?
Yes, the Potomac River Run Marathon (Fall) is an official Boston Marathon qualifier.
What will the weather be like for the 2026 Potomac River Run Marathon (Fall)?
The forecast calls for a high of 70°F and a low of 52°F with a 7% chance of rain.
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