Potomac River Run Marathon (Fall)

Carderock, MD, USA · October 17, 2026
partly-cloudy-day54°·66° high·Breezy·Dry
9
Weather
Course
FAQ
History

Race Day Weather

partly-cloudy-day
54°at start
66° high
Breezy
Dry

Cool start, warm finish

Runners will face temperatures starting at 50°F and peaking at 66°F. Winds will be a mild 10 mph from the SW, with gusts up to 29 mph. With humidity at 59% and a dew point of 45°F, conditions are favorable, allowing runners to maintain their pace without significant adjustments.

Race day forecast available in 150 days
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Race Info

Website
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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 66°F and a low of 50°F with a 0% 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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