The 2026 Green River Run With the Horses 10K has concluded.

Green River Run With the Horses 10K

Race complete
Green River, WY, USA · August 15, 2026·
partly-cloudy-day55°·58° high·Breezy·Dry
9
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Race Day Weather

clear-day
55°at start
77° high
Breezy
Dry
Your goal
0:00:00

Comfortable temps, big temp swing, moderate wind

Mild 55°F temps at gun time mean comfortable early miles without overheating risk. Temps will climb significantly to 77°F by later miles, so expect fading conditions as the race progresses. Moderate winds around 13mph may affect pacing on open sections of the course.

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Race Info

The Run With the Horses 10K starts in front of the pavilion on Expedition Island in Green River, Wyoming, at 6,100 feet. It follows city streets and the paved Greenbelt Trail along the Green River for the first two miles, then turns onto the county-graded dirt Wild Horse Loop Tour Road and climbs 1st Springs Canyon toward White Mountain. Runners turn around at the halfway point on the high plains desert and retrace the course back to Expedition Island, on the Saturday of River Festival weekend.

Race weekend

Saturday, August 15
7:00 AMMarathon (26.2 mi)7:00 AMHalf Marathon (13.1 mi)
7:00 AM10K (6.2 mi)
7:00 AM5K (3.1 mi)
Area Map

Course Map

FAQ

When is the 2026 Green River Run With the Horses 10K?

The 2026 Green River Run With the Horses 10K will be held on Saturday August 15, 2026.

What will the weather be like for the 2026 Green River Run With the Horses 10K?

The forecast calls for a high of 79°F and a low of 55°F with a 0% chance of rain. Check our detailed hourly forecast above for the best 10K race plan.

Historical Weather

Based on 22 years of data
Avg Temp
55°F
L:54° H:57°
RunScore
9
Conditions
Rain Freq
0%
0 of 22 yrs
Wind4mph
Dew36°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScoreResults
2026
partly-cloudy-day
55°/58°-
9
2025
clear-day
53°/58°-
8
2024
clear-day
55°/60°-
9
2023
clear-day
59°/60°-
8
2022
clear-day
54°/55°-
8
2021
clear-day
48°/51°-
10
2020
clear-day
52°/58°-
10
2019
clear-day
51°/55°-
10
2018
clear-day
52°/53°-
9
2017
clear-day
58°/61°-
10
2016
clear-day
38°/44°-
10
2015
partly-cloudy-day
63°/65°-
7
2014
clear-day
58°/62°-
9
2013
clear-day
64°/67°-
9
2012
clear-day
54°/59°-
10
2010
clear-day
59°/63°-
8
2009
clear-day
59°/62°-
10
2008
partly-cloudy-day
54°/54°-
10
2007
clear-day
51°/54°-
10
2006
clear-day
48°/51°-
10
2005
clear-day
53°/56°-
10
2004
clear-day
41°/46°-
10