Snohomish River Run Marathon
Snohomish, United States of America · Sunday 11 October 2026
The marathon event named Snohomish River Run Marathon is an annual road race held in Snohomish, Washington, typically in the autumn. The event features a course that starts and finishes in downtown Snohomish, with participants running alongside the Snohomish River. The course is primarily on pavement and follows an out-and-back design, offering runners a mostly flat route with some rolling hills.
Difficulty Calculator
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:m
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Adjusted Time
3:53:12
Time difference: -6.8 minutes compared to a flat, road, temperate course.
Course Details
Elevation Gain99m
Elevation High27m
Elevation Low2m
Weather Forecast
High11°C
Low7°C
Chance of Rain49%
How hard is Snohomish River Run Marathon?
Easyharder than 11% of marathons
Flattest / easiestHardest
On our difficulty model, Snohomish River Run Marathon plays about 1 minute faster than an average road marathon for a 3:30 runner. It ranks #1025 hardest of 1150 marathons we analyse, and #484 of 575 in United States of America. Use the calculator above to see the exact adjusted time for your own goal pace.
What will you run at Snohomish River Run Marathon?
Estimated finish times on this course versus the same effort on an average road marathon, based on its elevation, surface, and expected race-day temperature.
| Average-course time | On Snohomish River Run Marathon | Difference |
|---|---|---|
| 3:00:00 | 2:53:59 | −06:01 |
| 3:30:00 | 3:23:37 | −06:23 |
| 4:00:00 | 3:53:12 | −06:48 |
| 4:30:00 | 4:22:45 | −07:15 |
| 5:00:00 | 4:52:16 | −07:44 |
| 5:30:00 | 5:21:45 | −08:15 |
| 6:00:00 | 5:51:11 | −08:49 |
Use the calculator above for your exact goal time. Want a prediction from your own training? Try the marathon time predictor.
Snohomish River Run Marathon 2026 Course Analysis
Snohomish River Run Marathon is a full marathon held in Snohomish, United States of America. It is scheduled for Sunday 11 October 2026. The course is run on road surface with 99m of total climbing, with its high point near 27m above sea level. For registration and full race details, visit the official Snohomish River Run Marathon website.
Elevation Profile
This is a very flat course, with only 99m of total climbing and little change in altitude throughout. Flat profiles let you hold an even pace from start to finish, which makes this a fast, PB-friendly race.
Expected Race Day Weather
Based on historical weather data for October, the expected race day conditions are as follows. Near-ideal running temperatures are expected, ranging from 7°C to 11°C. This temperature range is widely considered optimal for marathon performance, allowing efficient heat dissipation without cold-related issues. There is a moderate chance of rain (49%). Runners may want to prepare for wet conditions but shouldn't expect persistent rainfall.
Surface Type: Road
Snohomish River Run Marathon is run on road surfaces, which provide the fastest and most predictable conditions for racing. Road courses allow for consistent pacing and are typically the best choice for a personal best.
Looking for an easier marathon or a tougher challenge? You can also compare Snohomish River Run Marathon against other marathons to find the right race for your goals.
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