Intermediate ultramarathons in Oklahoma, United States

Night race on runnable jeep roads and technical terrain at Twin Mountains Offroad Park, with frequent loops and hot, humid conditions.

Scenic nighttime route along Tulsa’s RiverParks asphalt trails, illuminated Arkansas River crossings, urban landmarks, and riverside views

Unmarked urban marathon course with map navigation, scenic city landmarks, mostly flat to gently rolling terrain, and convenience store aid stops

Varied single track and jeep paths through old growth woods, lakes, and rolling hills on a 1,000-acre private ranch, with gravel, dirt, sand, and roots

Rugged gravel and prairie course through Cookson Hills’ oak-hickory forests and valleys, with fall foliage and Illinois River views in the J.T. Nickel Preserve

Forested, rolling hills across 12,500 acres with smooth trails, rocky and rooted sections, and scenic park landscapes

Scenic single-track loops through Lake Thunderbird State Park with multiple endurance distances and runnable terrain near Oklahoma City

Dirt and gravel roads, leaf-covered four-wheel drive paths, 4,500 feet of elevation gain, multiple water crossings, remote Cookson Hills landscape

Scenic Lake Vian looped course with paved and dirt trails, wooded sections, hilltop lake views, steady elevation changes, and frequent aid stations

Scenic, challenging 50+ mile trail route through historic Osage Hills State Park