Green River Marathon, Relay, Half Marathon and 50K
The Green River Marathon offers a flat, fast course with a focus on community spirit.
Race Date
Jun 6, 2026
Location
Kent, WA
Quick facts
- Date
- Saturday, June 6, 2026
- Location
- Kent, Washington
- Distance
- Half marathon (13.1 mi) + 50K, 26.2M
- Course
- Loop Course
- Terrain
- Road
- USATF certified
- Not listed
- Finishers on record
- 150
Highlights
Good For
Atmosphere
Course
The Experience
The Green River Marathon, first run in 2002 and now in its 30th year, offers a straightforward racing experience. This event is designed for runners seeking a flat and fast course, making it a potential candidate for personal bests.
The race takes place in Kent, Washington, with typical race-day temperatures averaging between 51–69°F. While the provided data indicates a shrinking field trend and a low repeat-runner loyalty, the event's longevity suggests a dedicated core of participants. The marathon also offers 50K and half marathon distances, catering to a range of running abilities.
Race-provided description
2026 Green River Marathon, Relay, Half Marathon and 50K June 06, 2026 Green River Marathon Updated (05/23/26) Green River Marathon Link For 2026 Green River Marathon Link For 2025 **************************************** **************************************** Green River Marathon Link For 2024 Future races I will put on: https://greenrivermarathon.com/RACES.html I hope to see many of you Saturday (06/06/26) for our 30th Annual Running of this Marathon, Relay and Half Marathon. Thank you. Steve Barrick **************************************** **************************************** **************************************** **************************************** **************************************** **************************************** **************************************** ****
Course Info
Course Type
Loop Course
Terrain
road
Difficulty
Ultra-Flat
Net Drop/km
0 m (Flat)
Separation
0.0%
Also Offers
Quality Score
7 years running
~31 finishers a year
small race — neutral
0% returning runners
6 photos
runners from 1 state
winner 1:32:09
typical high 69°F
Race Day Weather
5-year historical avgStart (Low)
51°
Afternoon (High)
69°
Pleasant conditions — light layers at start, comfortable by finish
0.1"
Precipitation
10 mph
Wind
69%
Humidity
Historical Finish Times
How 150 finishers actually crossed the line across 7 years.
Most recent
2021
Total finishers
150
Median time
2:13:57
Latest turnout
31
States
2
Turnout by year
2010–2021
Hover the histogram to inspect specific finish times.
Race Photos
Frequently asked
When is the Green River Marathon, Relay, Half Marathon and 50K?
The Green River Marathon, Relay, Half Marathon and 50K is held on Saturday, June 6, 2026.
Where does the Green River Marathon, Relay, Half Marathon and 50K take place?
It takes place in Kent, Washington.
What distances does the Green River Marathon, Relay, Half Marathon and 50K offer?
The half marathon (13.1 miles), plus 50K, 26.2M.
Is the Green River Marathon, Relay, Half Marathon and 50K course flat and good for a PR?
The Green River Marathon, Relay, Half Marathon and 50K is a ultra-flat, loop course course.
How many people run the Green River Marathon, Relay, Half Marathon and 50K?
HalfRuns has finish records for 150 runners who have completed the Green River Marathon, Relay, Half Marathon and 50K.
HalfRuns editorial — independent, no paid placement.
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