100K Winter ultramarathons in United States (East)

Flat rail trail with gentle inclines, sub-1500 feet elevation gain, downtown Farmville start, High Bridge crossings, generous 100k cutoff

Looped single-track trails with roots, rocks, rolling hills, short technical stretches, and fire road sections through northern Virginia

50k and 100k winter ultras on a relatively flat rail trail, with gentle inclines, low elevation gain, and two crossings of High Bridge

Rugged, relentless terrain across every trail, summiting both peaks with dramatic lake views on Crowders Mountain’s toughest ultra distances

Rugged 66.6-mile Blue Ridge mountain trails, Glenwood Horse Trail start, overnight run through winter conditions

Scenic 100k point-to-point route from Horseshoe Lake, featuring trail and road sections through state parks, lakes, and picturesque New Jersey towns

Flat, fast 5-mile loop in Oak Mountain State Park; runnable trail format with frequent support access for 50K to 100-mile distances.

Multi-day ultramarathon series including a 200-mile, 100-mile, and 100 km race, with staggered starts and challenging distance courses.

6.5-mile loop in Vermont's Green Mountains with 1200 feet of elevation gain, expansive views, and variable winter conditions

Aid-supported overnight 50k through secretive routes, immediately followed by the Algonquin 50k for a combined 100k+ challenge

Remote trails in Kisatchie National Forest featuring rolling pine hills, sandy ridgelines, rocky and muddy terrain, creek crossings, and long climbs

Rocky singletrack out-and-backs on the Lake Ouachita Vista Trail, with rolling hills, exposed ridgelines, technical footing and lake views

Rocky, rolling hills and ridge lines overlooking Lake Ouachita, with demanding single-track through Ouachita National Forest on an IMBA Epic Trail