Casper Marathon
Wyoming's Casper Marathon offers a fast, flat course with a strong community feel.
Race Date
Jun 7, 2026
Location
Casper, WY
Quick facts
- Date
- Sunday, June 7, 2026
- Location
- Casper, Wyoming
- Distance
- Half marathon (13.1 mi) + 26.2M, 10K run | 26.2M relay
- Course
- Loop Course
- Terrain
- Road
- USATF certified
- Not listed
- Finishers on record
- 2,469
Highlights
Good For
Atmosphere
Course
The Experience
The Casper Marathon, first run in 2005 and now in its 19th edition, is a testament to Wyoming's running community. This race is known for its remarkably flat and fast certified course, making it an attractive option for those chasing personal bests or seeking a Boston Marathon qualifying time. The event typically sees around 111 finishers, drawing participants from across the state and beyond.
Runners can expect a steady pace on paved roads, with minimal elevation changes throughout the marathon and half marathon distances. The race is held in early June, with typical race-day temperatures ranging from the low 50s to high 70s, though wind can be a factor. The event fosters a welcoming atmosphere, with a dedicated group of repeat runners — about 18% return each year — highlighting its local appeal and solid organization.
While the field size is modest, the Casper Marathon provides a well-organized race experience. It's a great opportunity to experience a genuine community-focused event in the heart of Wyoming, offering a straightforward and efficient race day for all participants.
Race-provided description
Menu About Race Info Race Results Courses Volunteer Travel and Lodging Contact Register to Run Register to Run JUNE 7, 2026 jQuery(function() { // Set the date we're counting down to var countDownDate = new Date("June 07, 2026 00:00:00").getTime(); var countdown1 = document.getElementById("num1"); // get tag element var countdown2 = document.getElementById("num2"); // get tag element var countdown3 = document.getElementById("num3"); // get tag element var countdown4 = document.getElementById("num4"); // get tag element // Update the count down every 1 second var x = setInterval(function() { // Get today's date and time var now = new Date().getTime(); // Find the distance between now and the countdown date var distance = countDownDate - now; // Time calculations for days, hours, minutes, an
Course Info
Course Type
Loop Course
Terrain
road
Surface
Paved
Difficulty
Ultra-Flat
Net Drop/km
0 m (Flat)
Separation
0.0%
Also Offers
Quality Score
Solid Pick5719 years running
~113 finishers a year
shrinking
18% returning runners
2 timing sources
runners from 1 state
winner 1:26:02
typical high 79°F
Race Day Weather
5-year historical avgStart (Low)
53°
Afternoon (High)
79°
Warm — hydration strategy is key, start conservatively
0.1"
Precipitation
16 mph
Wind
50%
Humidity
Historical Finish Times
How 2,469 finishers actually crossed the line across 19 years.
Most recent
2025
Total finishers
2,469
Median time
2:22:16
Latest turnout
111
States
36
Turnout by year
2016–2025
Hover the histogram to inspect specific finish times.
Frequently asked
When is the Casper Marathon?
The Casper Marathon is held on Sunday, June 7, 2026.
Where does the Casper Marathon take place?
It takes place in Casper, Wyoming.
What distances does the Casper Marathon offer?
The half marathon (13.1 miles), plus 26.2M, 10K run | 26.2M relay.
Is the Casper Marathon course flat and good for a PR?
The Casper Marathon is a ultra-flat, loop course course.
How many people run the Casper Marathon?
HalfRuns has finish records for 2,469 runners who have completed the Casper Marathon.
HalfRuns editorial — independent, no paid placement.
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