Potomac River Run Marathon

Washington, DC, USA · May 1, 2027
partly-cloudy-day57°·70° high·Light·Dry
9
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Race Day Weather

partly-cloudy-day
57°at start
72° high
Light
Dry

Cool conditions, moderate wind

Runners will face a temperature starting at 49°F and peaking at 60°F. Winds will be from the NW at 14 mph, providing a slight headwind throughout. With humidity at 53%, hydration should be maintained, but no rain is expected, allowing for a focus on pacing without weather concerns.

Race day forecast available in 223 days
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Distance: 26.2mi
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Race Info

The Potomac River Run Marathon and Half Marathon start and finish at Fletcher's Cove on the C&O Canal Towpath in Washington, D.C. The out-and-back course follows the Potomac River past a series of historic canal locks and is USATF certified as a Boston Marathon qualifier. The race is organized by the Safety and Health Foundation, a nonprofit that directs proceeds to charity projects including schools and a health clinic in Africa. It is one of three marathon and half marathon events the foundation holds each year as part of its Grand Prix series.

Area Map

Course Map

FAQ

When is the 2027 Potomac River Run Marathon?

The 2027 Potomac River Run Marathon will be held on Saturday May 1, 2027.

Is the Potomac River Run Marathon a Boston Marathon Qualifier?

Yes, the Potomac River Run Marathon is an official Boston Marathon qualifier.

What will the weather be like for the 2027 Potomac River Run Marathon?

The forecast calls for a high of 72°F and a low of 55°F with a 10% chance of rain.

Historical Weather

Based on 7 years of data
Avg Temp
68°F
L:58° H:68°
RunScore
7
Conditions
Rain Freq
29%
2 of 7 yrs
Wind9mph
Dew50°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScoreResults
2026
partly-cloudy-day
47°/59°-
8
2025
partly-cloudy-day
69°/80°-
8
2024
rain
53°/54°Light
7
2023
partly-cloudy-day
55°/72°-
9
2022
cloudy
56°/66°-
9
2021
partly-cloudy-day
60°/81°-
8
2019
rain
64°/66°Light
6