Wyoming · Marathon · Half
Casper Marathon
Casper Marathon is a marathon and half marathon event held in Casper, Wyoming. Its next confirmed date is Monday, June 7, 2027. About 600 runners take part across all distances.
- Race day
- June 7, 2027
- Location
- Casper, WY
- Field size
- ~600 runners
Race details
- Date
- Monday, June 7, 2027
- Location
- Casper, Wyoming
- Distances
- Marathon, Half
- Field size
- About 600 runners
- Course
- Rolling hills
- Registration
- runsignup.com
- Official website
- caspermarathon.com
Registration, course & weather
- Course profile
- Point-to-point course; Road surface; 548 ft gain, 743 ft loss (estimated from third-party elevation data); Boston qualifier
- Typical race-day weather
- about 63°F at the start, 55% humidity, 6 mph wind (based on the 2026 race day, measured near the city center rather than the exact start line; Open-Meteo historical archive (gridded reanalysis), checked October 8, 2026)
About the Casper Marathon
Wyoming's longest-running and best-known marathon, held each June in Casper with chip-timed marathon, half, 10K and relay options starting at the Wyo Sports Ranch. A certified Boston qualifier drawing runners from across the region.
Rankings and notes
- Rankings and awards
- USATF-certified; Boston Marathon qualifier; longest-running marathon in Wyoming (23rd edition in 2026); 2024 RRCA Wyoming State Championship
- Notes
- Regional favorite [next_date estimated]
More marathons in Wyoming
Coming up next, by confirmed date.
More races in Casper
More upcoming races in Wyoming
Keep exploring
- All races in Wyoming
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- 10Ks in Wyoming 13 upcoming races
- Half Marathons in Wyoming 14 upcoming races
- Marathons in Wyoming 6 upcoming races
- Half Marathons in the United States 1,668 upcoming races
- Marathons in the United States 594 upcoming races
- Summer Marathons
- June Marathons
- June races in Wyoming
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- Marathons in Colorado 13 upcoming races
- Marathons in Idaho 13 upcoming races
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Guides from the RaceRove blog
- 8 min read How to Choose Your First Marathon A practical checklist for choosing a first marathon based on course, weather, cutoff, travel, field size and support.
- 7 min read How to Find a 5K, 10K, Half Marathon or Marathon Near You A practical way to find running races near you: pick a distance, decide how far you'll travel, read the listing properly and confirm the details before you register.
- 9 min read How to Run a Race in All 50 States How to plan a 50-state running challenge: set your own rules, group states into trips, build a calendar around the seasons, budget for it and keep track of every finish.
- Blog All guides Planning advice for finding, choosing and travelling to races.
Casper Marathon: common questions
- When is the Casper Marathon?
- The next confirmed date is Monday, June 7, 2027.
- Where is the Casper Marathon held?
- In Casper, Wyoming.
- What distances does the Casper Marathon offer?
- Marathon and Half.
- How many people run the Casper Marathon?
- About 600 runners across all of its distances. That figure is an estimate of the field size, not an entry cap.
- How do I register for the Casper Marathon?
- Registration is handled by the organiser at runsignup.com. Entry fees, caps and deadlines are set there.
- What is the course like at the Casper Marathon?
- Point-to-point course; Road surface; 548 ft gain, 743 ft loss (estimated from third-party elevation data); Boston qualifier.
- What is race-day weather usually like at the Casper Marathon?
- about 63°F at the start, 55% humidity, 6 mph wind (based on the 2026 race day, measured near the city center rather than the exact start line; Open-Meteo historical archive (gridded reanalysis), checked October 8, 2026).
Plan this race in RaceRove
Save it to your plan, compare it with other races, check typical race-day weather and track your 50-state progress in the interactive app.