Potomac River Run Marathon (Fall)

Carderock, MD, USA · October 17, 2026
partly-cloudy-day52°·66° high·Light·Dry
9
Weather
Course
FAQ
History

Race Day Weather

partly-cloudy-day
52°at start
67° high
Light
Dry

Mild start, warming trend ahead

Runners will face a temperature rise from 52°F to 66°F, with humidity at 60% and a dew point of 46°F. Winds will be light at 8 mph from the WNW, with gusts up to 23 mph. It's advisable to pace conservatively early on to adjust for the warming conditions.

Race day forecast available in 130 days
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Race Info

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Course Map

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FAQ

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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 9% chance of rain.

Historical Weather

Based on 2 years of data
Avg Temp
73°F
L:47° H:73°
RunScore
8
Conditions
Rain Freq
0%
0 of 2 yrs
Wind6mph
Dew42°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScoreResults

2025 Potomac River Run Marathon (Fall)

Partly cloudy throughout the day.

2025
partly-cloudy-day
51°/74°-
8

2024 Potomac River Run Marathon (Fall)

Clear conditions throughout the day.

2024
clear-day
43°/73°-
8

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Free guidesMarathon Fueling Guide·Carb Loading Guide·Race Morning Guide·Race Day Gear Guide·Pacing Strategy Guide·Mental Strategy Guide

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