Winter ultramarathons in Oklahoma, United States

Rugged, technical 50K route through the unexpectedly mountainous terrain of the Ouachita Mountains with significant elevation changes

50K on Tulsa’s paved Riverparks Trail system: fast, mostly flat riverside running with one notable hill appearing twice.

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

Rugged Twin Mountains loop featuring rocky climbs, creek crossings, steep powerline ascents, runnable jeep roads, and sections of historic stagecoach trail

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

Rolling 2-mile loops through Will Rogers State Park with solo and relay options, 12 or 24 hour format, scenic views and frequent aid station support.