The 2026 Green River Run With the Horses has concluded.

Green River Run With the Horses

Race complete
Green River, WY, USA · August 15, 2026
clear-day55°·69° high·Breezy·Dry
7
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Race Day Weather

clear-day
55°at start
79° high
Breezy
Dry
Your goal
0:00:00

Mild start, warm finish

Runners will face a temperature trend starting at 56°F and rising to 75°F. Wind will be light at 9 mph from the W, providing a slight headwind throughout. With humidity at 51% and a dew point of 45°F, hydration will be important, especially as temperatures climb. Runners should consider pacing adjustments as they transition into the warmer conditions.

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Pace Calculator

Distance: 26.2mi
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Race Info

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.

Race weekend

Saturday, August 15
7:00 AMMarathon (26.2 mi)
Half Marathon (13.1 mi)
10K (6.2 mi)
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 is the time limit for the Green River Run With the Horses?

The time limit for the Green River Run With the Horses is 7 hours.

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

The forecast calls for a high of 79°F and a low of 55°F with a 0% chance of rain.

Historical Weather

Based on 22 years of data
Avg Temp
61°F
L:54° H:70°
RunScore
8
Conditions
Rain Freq
5%
1 of 22 yrs
Wind5mph
Dew37°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScoreResults
2026
partly-cloudy-day
55°/69°-
7
2025
clear-day
53°/71°-
7
2024
clear-day
55°/79°-
7
2023
clear-day
59°/74°-
6
2022
clear-day
54°/62°-
7
2021
clear-day
48°/57°-
10
2020
clear-day
52°/73°-
8
2019
clear-day
51°/74°-
8
2018
clear-day
52°/67°-
7
2017
clear-day
58°/75°-
8
2016
clear-day
38°/57°-
10
2015
partly-cloudy-day
63°/75°-
6
2014
clear-day
58°/76°-
7
2013
clear-day
64°/80°-
7
2012
clear-day
54°/73°-
8
2010
clear-day
59°/80°-
6
2009
clear-day
59°/78°-
8
2008
partly-cloudy-day
54°/68°-
9
2007
clear-day
51°/71°-
9
2006
clear-day
48°/55°Light
10
2005
clear-day
53°/69°-
9
2004
clear-day
41°/58°-
10