Potomac River Run Marathon (Fall)

Washington, DC, USA · October 17, 2026
partly-cloudy-day53°·66° high·Light·Dry
9
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Race Day Weather

partly-cloudy-day
53°at start
66° high
Light
Dry

Comfortable temps, warming through the race

Mild 53°F temps at gun time mean comfortable early miles without overheating risk. Temperatures rising to 66°F through the course will gradually increase perceived effort in the second half. Light winds shouldn't be a major factor for pacing.

Race day forecast available in 19 days
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Distance: 26.2mi
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Race Info

The Potomac River Run Marathon (Fall) is a marathon and half marathon held each October in Washington, DC, organized by the Safety And Health Foundation. Both distances start and finish at Fletcher's Cove on the C&O Canal Towpath, running out and back along the flat, unpaved canal path toward Carderock, Maryland, with the half marathon turning around near Towpath mile 9.65. The race is USATF-certified and serves as a Boston Marathon qualifier, and it is run in memory of Dean Shulman and Wendy Martinez. It is capped at 350 entrants and is the third leg of the Safety And Health Foundation's annual Grand Prix series.

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 is the time limit for the Potomac River Run Marathon (Fall)?

The time limit for the Potomac River Run Marathon (Fall) is 6 hours.

What will the weather be like for the 2026 Potomac River Run Marathon (Fall)?

The forecast calls for a high of 69°F and a low of 53°F with a 8% chance of rain.

Historical Weather

Based on 7 years of data
Avg Temp
68°F
L:52° H:68°
RunScore
8
Conditions
Rain Freq
29%
2 of 7 yrs
Wind9mph
Dew48°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScoreResults
2025
partly-cloudy-day
51°/72°-
8
2024
clear-day
43°/72°-
8
2023
partly-cloudy-day
58°/66°Light
7
2022
cloudy
58°/61°Light
6
2021
partly-cloudy-day
56°/76°-
8
2020
partly-cloudy-day
50°/66°-
9
2019
partly-cloudy-day
49°/65°-
9