Casper, Wyoming, United States
The Casper Marathon draws approximately 89 finishers each June on a scenic road in Casper, United States. Wyoming's fast-growing Casper Marathon is a USATF-certified Boston qualifier in the heart of the state. The course follows Casper river trails, prairie roads, and wide-open Wyoming vistas. Gentle undulations are the only breaks on an otherwise flat profile.
Casper Marathon is a certified 42.195 km (26.2 mile) marathon — the standard World Athletics marathon distance.
The next Casper Marathon is scheduled for Sunday, 6 June 2027 with a 7:00 am start. The certified course covers 42.195 km (26.2 miles) with 100 m of climbing on a mostly flat with gentle undulations layout.
The Casper Marathon is a largely flat scenic road course suited to steady pacing. Starts and finishes in Casper on a North Platte River valley loop. The course follows Casper river trails, prairie roads, and wide-open Wyoming vistas. Mostly flat with gentle undulations.
The Casper Marathon course is mostly flat with gentle undulations over 42.195 km (26.2 miles). Runners cover 100 metres of climbing and 95 metres of descent, with a net climb of 5 metres from start to finish.
Casper Marathon is typically held in June. Registration opens through https://runwyoming.com/ and may use a lottery or tiered entry when demand exceeds capacity.
Last updated 18 July 2026. Edition dates and course details are reviewed regularly.
Other races closest to Casper.
The Med Bow Rail Marathon draws approximately 45 finishers each May on a scenic trail road in Laramie, United States. Laramie's Med Bow Rail Marathon uses a rail-trail corridor through southeastern Wyoming's high country. The course follows the Medicine Bow Rail Trail through high-plains and mountain-foothill scenery. Rolling terrain with moderate climbs shapes the middle miles.
Next race: Sunday, 2 May 2027
The Run Crazy Horse Marathon draws approximately 135 finishers each October on a scenic road in Hill City, United States. The Black Hills marathon near Crazy Horse Memorial draws runners to Hill City each October. The course tours Black Hills roads with granite peaks, forest corridors, and Crazy Horse Memorial vistas. Expect significant climbs on this hilly course.
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The Deadwood-Mickelson Trail Marathon draws approximately 238 finishers each June on a scenic trail road in Deadwood, United States. South Dakota's largest running event by participation finishes in the historic landmark town of Deadwood. The course follows the crushed-limestone Mickelson Trail through Black Hills forests, creeks, and mining-country scenery. Expect significant climbs on this hilly course.
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The Leading Ladies Marathon draws approximately 125 finishers each June on a scenic road in Spearfish, United States. Spearfish's Leading Ladies Marathon is a popular June Black Hills race with a rolling scenic course. The course follows Spearfish Canyon connectors and northern Black Hills scenic roads. Rolling terrain with moderate climbs shapes the middle miles.
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The Colorado Marathon draws approximately 1,800 finishers each May on a canyon point-to-point road in Fort Collins, United States. It delivers a scenic mountain-canyon descent without the extreme grade of some western downhill marathons. The course follows the Cache la Poudre River, red-rock canyon walls, and the approach into northern Colorado neighborhoods. The route is net downhill overall.
Next race: Sunday, 2 May 2027
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