Green River Run With the Horses

Green River, WY, USAAugust 15, 2026

Race Day Weather

clear-day
56°
81° high
Breezy
Dry

Warm afternoon, moderate wind

Runners will face temperatures rising from 56°F to a peak of 81°F, with a maximum wind speed of 13 mph from the SW. Humidity will remain low at 35%, ensuring a dry race. To optimize performance, runners should start conservatively and hydrate frequently as the heat increases later in the race.

Race day forecast available in 117 days
clear-night9
clear-night9
clear-day9
clear-day9
clear-day9
clear-day8
clear-day8
clear-day7
clear-day7
partly-cloudy-day7
partly-cloudy-day7

Pace Calculator

Distance: 26.2mi
0:00:00
HH:MM:SS
Pace
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.

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

The forecast calls for a high of 81°F and a low of 56°F with a 0% chance of rain.

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