Snohomish River Run Marathon

Snohomish, WA, USA · October 11, 2026

41°·54° high·Light·Rain possible

Weather

Race Day Weather

41°at start

56° high

Light

Rain possible

Cool start, mild finish

Runners will face a temperature rising from 41°F to a comfortable 56°F. With a light headwind throughout, maintaining a steady pace is crucial. The humidity at 74% may feel uncomfortable, prompting runners to hydrate frequently. A slight chance of light rain may occur, so gear choices should consider potential wet conditions.

Race day forecast available in 41 days

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Distance: 26.2mi

Target Finish Time

0:00:00

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Race Info

The Snohomish River Run Marathon offers a flat, fast course along the scenic Snohomish River, ideal for runners aiming for personal bests. Starting and finishing in downtown Snohomish, participants enjoy picturesque views of the river and surrounding landscapes. The event fosters a welcoming atmosphere, with all participants receiving a race shirt and finisher medal, and marathon finishers also receiving a finisher crewneck.

Website

Course Map

FAQ

When is the 2026 Snohomish River Run Marathon?

The 2026 Snohomish River Run Marathon will be held on Sunday October 11, 2026.

Is the Snohomish River Run Marathon a Boston Marathon Qualifier?

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

What will the weather be like for the 2026 Snohomish River Run Marathon?

The forecast calls for a high of 60°F and a low of 43°F with a 23% chance of rain.

Historical Weather

Based on 14 years of data

Avg Temp

59°F

L:49° H:60°

RunScore

Conditions

Rain Freq

36%

5 of 14 yrs

Wind5mph

Dew46°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

Year	Low / High	Rain	Dew Point
2025 Snohomish River Run Marathon Partly cloudy throughout the day with a chance of rain throughout the day. 2025	48°/51°	Light	45°
2024 Snohomish River Run Marathon Clear conditions throughout the day. 2024	52°/72°	-	50°
2023 Snohomish River Run Marathon Partly cloudy throughout the day with rain. 2023	57°/65°	-	50°
2022 Snohomish River Run Marathon Clear conditions throughout the day. 2022	59°/84°	-	39°
2021 Snohomish River Run Marathon Partly cloudy throughout the day with late afternoon rain. 2021	52°/55°	-	49°
2020 Snohomish River Run Marathon Cloudy skies throughout the day with a chance of rain throughout the day. 2020	50°/57°	Light	52°
2019 Snohomish River Run Marathon Partly cloudy throughout the day with early morning rain. 2019	49°/55°	-	47°
2018 Snohomish River Run Marathon Clear conditions throughout the day. 2018	40°/62°	-	35°
2017 Snohomish River Run Marathon Clear conditions throughout the day. 2017	42°/58°	-	43°
2016 Snohomish River Run Marathon Partly cloudy throughout the day with rain. 2016	48°/54°	-	45°
2015 Snohomish River Run Marathon Partly cloudy throughout the day with early morning rain. 2015	51°/63°	-	47°
2014 Snohomish River Run Marathon Partly cloudy throughout the day with rain. 2014	48°/52°	Light	45°
2013 Snohomish River Run Marathon Partly cloudy throughout the day with rain in the morning and afternoon. 2013	46°/52°	Light	45°
2012 Snohomish River Run Marathon Partly cloudy throughout the day with rain. 2012	51°/57°	Light	49°