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Wyoming's longest-running marathon — 23 years and still going strong. The Casper Marathon isn't just the longest-running marathon in Wyoming — it's one of the most characterful small-town races in the Mountain West. At 5,150 feet above sea level, the start sits high enough to notice. Casper Mountain (8,130 ft) dominates the southern horizon as you run. The North Platte River winds its way through the high desert. Sagebrush lines the flats. The sky is enormous. This is Wyoming — and running through it on the first Sunday of June is nothing like running anywhere else in America.
🏔️ Wyo Sports Ranch · Casper Mountain (8130 ft) · North Platte River · High Plains · Sagebrush · Big Sky Country · Natrona County · Casper · Wyoming · USA · 5,150 ft / 1,570m elevation
Casper, Wyoming — 23 years of running in the Heart of the West
On Sunday June 7, 2026, the Casper Marathon returns for its 23rd edition — the longest-running marathon in Wyoming. For the first time, the race launches from a new home: the Wyo Sports Ranch, a new start/finish location that the organisation is excited to debut. Five events span the morning: the Full Marathon (26.2 miles, Boston Qualifier), the Half Marathon (13.1 miles), the Marathon Relay, the Half Marathon Relay and the 10K (whose proceeds go to local Casper non-profits). The course is mostly flat, mostly out-and-back, with views of Casper Mountain and the North Platte River throughout. All events are professionally timed with RFID-chipped bibs via Laurelt. After-party and awards ceremony at The Ranch at 3:00pm. This is a non-profit event, RRCA member, organised with the spirit of giving back to the Casper community.
23rdEdition — Wyoming's longest marathon
5150 ftElevation — high altitude running
PR 93.8Course score — fast & flat
🍺Packet pickup at brewery · free beer
The five events
Sunday June 7, 2026 · Wyo Sports Ranch 🏅 Full Marathon 26.2 miles 42.195 km · USATF Certified · Boston Qualifier
Mostly flat, mostly out-and-back course through Casper and the North Platte River corridor. USATF-certified. PR Score 93.77 — one of the highest-rated flat marathon courses in Wyoming. Views of Casper Mountain (8,130 ft) throughout. Mostly road/pavement.
Boston Qualifier USATF Certified
Sunday June 7, 2026 · Wyo Sports Ranch ⚡ Half Marathon 13.1 miles 21.097 km · Flat · North Platte River views
The half marathon course shares the same flat, fast character as the full marathon. Perfect for a Wyoming half PR — the elevation provides enough of a challenge without derailing a good time. RFID chip timed. Community atmosphere.
RFID Chip Timed North Platte River
Sunday June 7, 2026 · Wyo Sports Ranch 🌿 10K 6.2 miles Proceeds to Casper non-profits · RFID timed
The 10K carries a unique purpose: proceeds from entry fees are donated to local non-profit organisations within the Casper community. RFID chip timed. Open to all paces. The perfect entry point to running in Wyoming's high-altitude, big-sky environment.
Proceeds → Casper non-profits RFID Timed
Marathon Relay + Half Marathon Relay 👥 Relays 26.2 mi / 13.1 mi Team event · All levels · RFID timed
Both the full marathon and half marathon are available as relay formats. A great way to tackle the Casper course with friends or colleagues — share the miles, share the medal, and share a beer at the after-party. RFID chip timed for all relay legs.
RFID Timed Team event
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The course — flat, fast and wide-open Wyoming. New in 2026: Wyo Sports Ranch start/finish. The Casper Marathon course is described as mostly flat, mostly out-and-back, on road and pavement — ideal conditions for a personal best. The North Platte River provides a constant companion for much of the route. The views of Casper Mountain (8,130 ft) to the south are omnipresent. This is running in high-altitude semi-arid terrain: expect crisp morning air, clear skies, and the kind of open horizon that only exists in the American West. Race day weather averages: mean 60°F (15°C), high 75°F (23°C), low 44°F (6°C). A shuttle is offered between the finish area and the start for those who need it.
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Packet pickup at the brewery — and a free beer with it (21+). The Casper Marathon is a race that understands celebration. Packet pickup is held at a local Casper brewery, where registered runners (21+) receive a free beer before race day. Then, after you cross the finish line, the party continues at The Ranch (Wyo Sports Ranch) at 3:00pm — with live music, well-stocked food and more beers. The medals and swag are described by runners as excellent. This is the Casper Marathon's identity: competitive on the road, festive off it. A small-town jewel.
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Boston Qualifier + USATF-certified — serious credentials, small-town heart. The Casper Marathon is an official Boston Athletic Association qualifying event — times run here count toward Boston Marathon registration. The course is USATF-certified, meaning distances are officially measured and verified. PR Score of 93.77 puts it among the fastest marathon courses in the Mountain West for its altitude profile. The Casper Marathon is also an RRCA (Road Runners Club of America) member event.
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The 10K gives back. In keeping with the event's non-profit spirit, financial proceeds from the 10K entry fees are donated to local non-profit organisations within the Casper, Wyoming community. Running the 10K at Casper isn't just a race — it's a contribution to the town that hosts it.
« Small-Town Jewel! From start to finish, it's clear that the race operators love a festive atmosphere. Packet pickup was held at a local brewery, and 21+ runners get a free beer there — in addition to beers at the post-race party. The party is well-stocked with excellent food and there's live music. The swag is excellent. A shuttle is offered from the finish area to the start. The race begins at the Wyoming Center, which is indoors, so you have that going for you, which is nice. » — FindMyMarathon.com community review, Casper Marathon
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Start & Finish (new in 2026): Wyo Sports Ranch, Casper, Wyoming (Natrona County). Organiser: Visit Casper Marathon · runwyoming.itsyourrace.com (non-profit, RRCA member). Timing: Laurelt · results.laurelt.com/vcm · RFID chip bibs for all distances. Events: Full Marathon (26.2mi, Boston Qualifier) · Half Marathon (13.1mi) · Marathon Relay · Half Marathon Relay · 10K (proceeds to local non-profits). Course: Mostly flat · Mostly out-and-back · Road/pavement · USATF-certified · Views Casper Mountain + North Platte River. Altitude: 5,150 ft / 1,570m. PR Score: 93.77. Weather June 7: Mean 60°F (15°C) · High 75°F (23°C) · Low 44°F (6°C). Packet pickup: Local brewery (free beer for 21+). After-party: 3:00pm at The Ranch · Live music · Food · Beer. 2025 finishers: 110 (Marathon). Access Casper WY: Casper/Natrona County International Airport (CPR) · I-25 · 300 miles north of Denver · 260 miles east of Jackson Hole.
Running shoes & gear — i-Run
Running shoes for the Casper Marathon — flat and fast road course at 5,150 feet elevation in Wyoming's high plains, from the 10K to the 26.2-mile Boston Qualifier. i-Run, running specialist. Worldwide shipping.
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