Green River Marathon
Race Day Weather
Cool start, gradual warming
Runners will face a temperature increase from 57°F at the start to 70°F by the finish. Winds will be out of the WSW at 9 mph, with gusts up to 25 mph, creating a challenging headwind. With humidity at 57%, runners should consider pacing conservatively in the initial miles to accommodate the rising temperatures.
The Green River Marathon, a volunteer-run event in Kent, WA, offers a flat and fast course with picturesque views. Runners enjoy a scenic journey along the Green River Trail, culminating in a finish with views of Seattle, Puget Sound, and the Olympic Mountains. This community-focused race emphasizes a low-key, friendly atmosphere, and historically operates with no entry fee, instead relying on donations to support Northwest Harvest. Source
FAQ
When is the 2026 Green River Marathon?
Is the Green River Marathon a Boston Marathon Qualifier?
What is the time limit for the Green River Marathon?
Historical Weather
Temperature History
Range of temperatures during race hours for each year.
Detailed History
| Year | Conditions | Low / High | Rain | Dew Point | Score |
|---|---|---|---|---|---|
2025 | | 62°/77° | - | 53° | |
2024 |  | 55°/62° | - | 47° | |
2023 |  | 55°/70° | - | 44° | |
2022 | | 58°/68° | - | 51° | |
2021 | | 55°/64° | - | 46° | |
2020 | | 54°/61° | - | 46° | |
2017 | | 57°/63° | - | 46° | |
2016 | | 67°/80° | - | 55° | |
2015 | | 64°/80° | - | 52° | |
2014 | | 57°/70° | - | 51° | |
2013 | | 56°/69° | - | 46° | |
2012 | | 54°/65° | Light | 49° | |
2011 | | 56°/74° | - | 50° | |
2010 | | 54°/66° | Light | 46° | |
2009 | | 57°/61° | - | 53° | |
2008 | | 49°/56° | - | 44° | |
2007 | | 62°/77° | - | 48° | |
2006 | | 57°/68° | - | 48° |