50mi February ultramarathons in United States

50-mile loop around Skull Mesa via Trail 4, Chalk Canyon and Seven Springs, with Sonoran Desert singletrack, creekside stretches and rugged canyons

Scenic 50-mile route at Fort Ord National Monument featuring single-track trails, rocky climbs, military history, and panoramic coastal views

Deep snow, dramatic winter conditions, historic drawbridge crossing, and scenic towpath from Wide Water’s Marina in Lockport, NY

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

Valentine's weekend ultramarathon featuring 100 Mile and Metric Century options, scenic trails, 36-hour cutoff, and Friday evening start for the Century

50 miles of diverse terrain amid natural park scenery, cup-free and aid-station-free, emphasizing self-sufficiency and environmental stewardship

10-mile desert loop with steep climbs and descents, packed dirt and rocky terrain, elevations from 1903 to 2333 feet, expansive mountain and desert views

Memorial Park singletrack and Bayou Wilds loops with flowing dirt, roots, some sand, minimal pavement, and very few road crossings.

Certified 1.2-mile loop with gentle elevation, 95% hard surface, scenic lake and bridge crossings, and generous time limits in Henderson, Nevada

Technical 100 and 50-mile routes over Lookout Mountain, challenging trails and panoramic scenery finishing at Ross’s Landing alongside a whiskey festival

Point-to-point ultramarathon along Florida’s Space and Treasure Coasts, with ocean views, historic sites, and passage through beach towns

South Mountain Reservation trails in Maplewood, with a roughly 10-mile wooded loop format for 50K and 50-mile distances.

Looped equestrian trails on rolling Central Texas hills, with dirt, sand and rock underfoot and roughly 720 feet of gain per 10-mile loop.

Self-supported 50-mile single-loop trail route with 5,000 feet of climbing, no course markings, and full navigation responsibility.

Remote Arizona Strip loop on ATV trails through rocky canyons and Joshua tree country, with steep climbs, rugged footing, and wide-open views

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

.66-mile loop with varied terrain and elevation, untimed winter event focused on movement and community, amenities along the course

Rugged jeep trails and singletrack winding through red rock country near Moab, with vistas of the La Sal Mountains and Canyonlands National Park