Green River Run With the Horses

Green River, WY, USAAugust 15, 2026

Race Day Weather

clear-day
56°
81° high
Breezy
Dry

Warming up, steady breeze

Runners will face a temperature rise from 56°F at the start to 81°F by the finish. A steady wind from the SW at 13 mph may provide some relief, but gusts could reach 31 mph. With humidity at a comfortable 35%, it's advisable to pace conservatively early and stay hydrated throughout the race.

Race day forecast available in 137 days
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Pace Calculator

Distance: 26.2mi
0:00:00
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Weather Adj.
Common Goals:

The Run with the Horses Marathon in Green River, Wyoming, offers a challenging and scenic course that begins at Expedition Island, situated at an elevation of 6,100 feet. Runners traverse city streets and the Greenbelt Trail before ascending 1st Springs Canyon and crossing the top of White Mountain, with elevations ranging from 7,300 to 7,500 feet. This out-and-back route provides breathtaking high plains desert vistas and opportunities to encounter wild horses and other wildlife. Held annually during the River Festival, the event features a vibrant atmosphere with a Cajun shrimp boil, craft vendors, live music, and fireworks. Aid stations are available every two miles, and the race accommodates all levels with a seven-hour time limit. Finishers receive unique horse-themed medals, and age group winners are awarded trophies made from local minerals. Source

Area Map

Course Map

FAQ

When is the 2026 Green River Run With the Horses?

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

Historical Weather

Based on 21 years of data
Avg Temp
78°F
L:54° H:79°
RunScore
7
Conditions
Rain Freq
10%
2 of 21 yrs
Wind12mph
Dew31°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScore
2025
clear-day
53°/81°-
8
2024
clear-day
55°/83°-
8
2023
clear-day
59°/81°-
8
2022
clear-day
54°/71°-
8
2021
clear-day
48°/70°-
8
2020
clear-day
52°/83°-
8
2019
clear-day
51°/78°-
8
2018
clear-day
52°/76°-
8
2017
clear-day
58°/82°-
8
2016
clear-day
38°/72°-
8
2015
partly-cloudy-day
63°/83°-
8
2014
clear-day
58°/84°-
7
2013
clear-day
64°/87°-
8
2012
clear-day
54°/80°-
8
2010
clear-day
59°/84°-
8
2009
clear-day
59°/90°-
8
2008
partly-cloudy-day
54°/84°-
8
2007
clear-day
51°/83°-
8
2006
clear-day
48°/58°Light
7
2005
clear-day
53°/77°-
8
2004
clear-day
41°/67°Light
8