Saturday, August 21, 2021 • Green River, WY • Course Map
Unless you’re a native of the high country of southwestern Wyoming — and well-accustomed to the high altitudes here — this is likely to be one of the most challenging road race events you’ll ever run, as it takes runners on an out-and-back route that runs high into the mountains overlooking this small city in Wyoming’s southwestern corner.
The elevation for the marathon starting line is about 6,100 feet above sea level and the course reaches is highest altitude at about 7,500 feet. All three races start together in Green River’s Island Park, making this event very much a challenge for runners of all abilities.
The course takes runners along what is known as the Wild Horse Loop, where wild mustang horses can often be spotted along the maintained dirt roads that are used for the course, which takes runners participating in the half-marathon from the starting point on Route 53 (just outside Point Butte) along the mountain ridge, passing White Mountain and The Towers mountain on the way southward to the finish in the town of Green River.
The field of participants for the event is usually small — in most years, about 100 to 150 runners (sometimes more, sometimes less) cross the finish line in all races combined — but what this race lacks in big, energetic crowds it more than makes up for in the awe-inspiring scenery along the course.
In addition to the wild horses, you’ll see plenty of wide open spaces with mountains in the background, majestic butte rock formations pointing toward the sky, and run across bridges as you make your way into Green River for the finish.
While the last mile or so of the race is run across paved surfaces, most of the rest of the race is run on dirt roads in the nearby mountains, so plan accordingly with footwear.
All photos courtesy Run With the Horses Marathon/Green River Chamber of Commerce
Race Weather & Climate
Located in the southwest corner of the state, about 270 miles west of Cheyenne and roughly 170 miles northeast of Salt Lake City, Utah, Green River typically sees some of its warmest and driest weather of the year in August, which has brought record temperatures here as low as 26°F (in 1992) and as high as 100°F (in 1979).
On race day (Aug. 21), the average low is 46ºF and the average high is 84ºF.
- 2019 Run with the Horses Half Marathon Results
- 2018 Run with the Horses Half Marathon Results
- 2017 Run with the Horses Half Marathon Results
- 2016 Run with the Horses Half Marathon Results
- 2015 Run with the Horses Half Marathon Results
- 2014 Run with the Horses Half Marathon Results
- $65 and up for the half marathon
- $95 and up for the full marathon
- $20 – $40 for the 10K
To reserve your spot in the 2021 running of Green River’s Run with the Horses Marathon, Half Marathon or 10K race, register online at RunnerCard.com here.
Official Race Website
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