Snohomish River Run Marathon
Race Day Weather
Cool conditions, slight rain risk
Runners will face temperatures starting at 45°F and rising to 52°F, with humidity at 81%. Light rain is possible, so a throwaway layer may be useful before the race. With light winds from the SSE, runners should maintain a steady pace and stay hydrated throughout, adjusting for the cooler early laps as they warm up.
Pace Calculator
Enter a finish time to see what race day does to it.
Get forecast alerts for Snohomish River Run Marathon
We'll text or email you when the forecast shifts — so you can adjust gear, pacing, and strategy. Max one per day.
Get your personalized Snohomish River Run Marathon 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 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.
