Potomac River Run Marathon (Fall)

Washington, DC, USA · October 17, 2026
partly-cloudy-day51°·53° high·Windy·Dry
9
Register

Race Day Weather

partly-cloudy-day
51°at start
54° high
Windy
Dry
Your goal
0:00:00

Cool temps, breezy conditions

Runners will face temperatures starting at 51°F and peaking at 54°F, with a humidity of 62% and a dew point of 39°F. Wind will be a factor, with a consistent mix of headwind, tailwind, and crosswind throughout the race, reaching up to 18 mph. To optimize performance, runners should maintain a conservative pace in the early laps and stay hydrated, especially given the potential for cooler conditions at the start.

partly-cloudy-night8
partly-cloudy-night9
partly-cloudy-day9
partly-cloudy-day9
partly-cloudy-day9
partly-cloudy-day8
partly-cloudy-day8
partly-cloudy-day8
partly-cloudy-day9
partly-cloudy-day9
partly-cloudy-day9

Pace Calculator

26.2mi
0:00:00
HH:MM:SS
Pace
—

Enter a finish time to see what race day does to it.

Common Goals:

Get forecast alerts for Potomac River Run Marathon (Fall)

We'll text or email you when the forecast shifts — so you can adjust gear, pacing, and strategy. Max one per day.

Race Plan

Get your personalized Potomac River Run Marathon (Fall) race plan

A mile-by-mile breakdown of where your time goes, weather-adjusted splits, fueling timeline with aid stations, packing checklist, carb tracker, spectator guide, all built around your goal and race-day conditions.

Race Pace
Weather Splits
Nutrition
Gear & Packing
T-Minus
Carb Tracker
Spectator Guide
Race Band

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.

Race weekend

Saturday, October 17
8:00 AMMarathon (26.2 mi)
Half Marathon (13.1 mi)

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 61°F and a low of 45°F with a 53% chance of rain.

Historical Weather

Based on 7 years of data
Avg Temp
59°F
L:53° H:65°
RunScore
7
Conditions
Rain Freq
29%
2 of 7 yrs
Wind8mph
Dew49°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScoreResults
2025
partly-cloudy-day
53°/66°-
8
2024
clear-day
45°/67°-
8
2023
partly-cloudy-day
58°/66°Light
5
2022
cloudy
58°/60°Light
7
2021
partly-cloudy-day
56°/72°-
6
2020
partly-cloudy-day
50°/64°-
8
2019
partly-cloudy-day
49°/62°-
9