Race Day Weather
Comfortable temps, big temp swing, moderate wind
Mild 56°F temps at gun time mean comfortable early miles without overheating risk. Temps will climb significantly to 81°F by later miles, so expect fading conditions as the race progresses. Moderate winds around 14 mph may affect pacing on open sections of the course.
Pace Calculator
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
Historical Weather
Temperature History
Range of temperatures during race hours for each year.
Detailed History
| Year | Conditions | Low / High | Rain | Dew Point | Score |
|---|---|---|---|---|---|
2025 | 53°/81° | - | 46° | ||
2024 | 55°/83° | - | 35° | ||
2023 | 59°/81° | - | 47° | ||
2022 | 54°/71° | - | 50° | ||
2021 | 48°/70° | - | 42° | ||
2020 | 52°/83° | - | 27° | ||
2019 | 51°/78° | - | 32° | ||
2018 | 52°/76° | - | 46° | ||
2017 | 58°/82° | - | 26° | ||
2016 | 38°/72° | - | 36° | ||
2015 | 63°/83° | - | 47° | ||
2014 | 58°/84° | - | 34° | ||
2013 | 64°/87° | - | 25° | ||
2012 | 54°/80° | - | 28° | ||
2010 | 59°/84° | - | 34° | ||
2009 | 59°/90° | - | 27° | ||
2008 | 54°/84° | - | 24° | ||
2007 | 51°/83° | - | 25° | ||
2006 | 48°/58° | Light | 47° | ||
2005 | 53°/77° | - | 25° | ||
2004 | 41°/67° | Light | 31° |