Next race
Sunday, 6 June 2027
7:00 am start
Distance
42.195 km / 26.2 mi
Scenic road
Elevation
Rolling · 100 m gain
100 m climbing
Race profile
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.
Approximately 89 finishers
Course & terrain
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 rolling 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.
Rolling · 100 m gain — approx. 1,558 m above sea level
↑ 100 m · ↓ 95 m · net +5 m
Registration
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.
Getting there
Casper-Natrona County International Airport (CPR)
13 km / 8 mi
Common questions
Official resources
Last updated 11 October 2026. Edition dates and course details are reviewed regularly.
Close to this race
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 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.
Next race: Sunday, 6 June 2027
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.
Next race: Sunday, 6 June 2027
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
The Run with the Horses Marathon draws approximately 57 finishers each August on a scenic road in Green River, United States. Green River's Run with the Horses Marathon serves southwestern Wyoming on a rolling high-desert course. The course tours Green River neighborhoods and high-desert plateau roads. Rolling terrain with moderate climbs shapes the middle miles.
Next race: Sunday, 1 August 2027
The Boulderthon Marathon draws approximately 1,500 finishers each September on an urban and foothills road in Boulder, United States. Its branding and local support turned it into a fast-growing Rocky Mountain marathon almost immediately. The course passes Pearl Street, CU Boulder, and open roads beneath the Flatirons with broad Front Range views. Rolling terrain with moderate climbs shapes the middle miles.
Next race: Sunday, 26 September 2027
Planning guides
Practical guides to help you plan, train for, and run this race.
Which US marathons produce Boston qualifiers in practice — course data, typical BQ rates, and how to match a race to your qualifying window.
What flat, rolling, and hilly really mean — and how to read elevation gain, net change, and altitude on a marathon course.
How major marathons allocate places — open entry, lotteries, charity bibs, tour operators, and what to check before you commit to a trip.
