Snohomish River Run Marathon
A flat, fast fall course follows the winding Snohomish River through quiet farmland and evergreens, starting and finishing in downtown Snohomish.
Every link above goes to the race, its timing provider, or an official registration partner. Last checked July 24, 2026.
Quick facts
- Flat course along the Snohomish River with farmland and evergreen views.
- Start and finish at 1st Street and Avenue D in historic downtown Snohomish.
- Marathon field starts ahead of the half marathon, 10K, and 5K waves.
- Cool, often damp October conditions suit steady pacing.
2026 Snohomish River Run Marathon registration
Registration for the 2026 Snohomish River Run Marathon runs through the official registration page at runsignup.com.
About the Snohomish River Run Marathon
For Pacific Northwest runners who want a flat October marathon without big-city logistics, the Snohomish River Run keeps things compact. The race is based in the historic downtown of Snohomish and pairs river-valley scenery with a full menu of shorter distances on the same morning.
Course
The marathon follows the Snohomish River through open farmland with evergreen ridgelines in view, starting and finishing at 1st Street and Avenue D in the old downtown. The profile is flat and the roads are quiet, which makes the race friendlier to steady pacing than most fall options in the region.
Race-day weather
Mid-October in western Washington usually brings cool, damp mornings in the 40s and low 50s. Drizzle and gray skies are more likely than wind or heat, and many runners find the conditions close to ideal once they warm up.
Past Snohomish River Run Marathon dates and results
| Year | Date | Status | Results |
|---|---|---|---|
| 2026 | Sunday, October 11, 2026 | Upcoming | — |
Snohomish River Run Marathon FAQ
When is the Snohomish River Run Marathon?
The 2026 Snohomish River Run Marathon is on Sunday, October 11, 2026.
How do I register for the Snohomish River Run Marathon?
Register for the Snohomish River Run Marathon through the official registration link: marathonscout.com/go/snohomish-river-run-marathon/register. It opens the race registration page at runsignup.com.
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