February ultramarathons in United States

Diverse terrain loop in Lake Anna State Park, winter conditions, forest and lakeside scenery

Challenging winter loops on Grandeur Peak with 2,600 feet of elevation gain per 5.8-mile circuit in the Wasatch Mountains

Trail loops in challenging winter conditions supporting air quality nonprofits and environmental education

Winter endurance loop on Grandeur Peak in the Wasatch Mountains, featuring challenging snowy conditions and views along the Wasatch Front.

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

360 miles circling Hawaii’s Big Island, shifting sand, lava fields, jungle gulches, 114,000 feet of elevation change, eight climate zones, summit ascents

Five-loop course around a tranquil lake, gently rolling pine-needle trails, non-technical surface with occasional roots, 100 mile and 100km distances

Scenic trails from Hacienda Entrance through Sierra Azul, summit finishes on Bald Mountain and Mt. Umunhum, diverse terrain and challenging climbs

Scenic, flat 50k route through Chesapeake and Pocomoke forests on Maryland's Eastern Shore, 95% trails with single-track and wide paths

Winter 50k on repeated loops around Devil’s Bathtub through glacial eskers, with fading daylight, lengthening shadows, and a cozy lodge each lap

Steep summit climb from Upper Parking Lot, technical descents, and multiple laps on a rugged mountain loop amid challenging elevation changes.

Winter ultrarunning on multiple scenic loops through varied terrain, dramatic Pike's Peak vistas, and Colorado Front Range landscapes in Cheyenne Mountain State

Fast, scenic rail-trail ultra on a 15.5-mile out-and-back through Fort Richardson State Park, with paved trail and soft fine gravel footing.

Shaded woodland loops on packed sand and pine needles, gentle elevation, single- and double-track trails with convenient pavilion start and finish

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

Steep initial ascent to Stone Mountain summit followed by a demanding 8-mile loop, repeated four times for the 50k distance

Rocky, root-laden single-track trails and creek crossings through Uwharrie National Forest, with handmade pottery awards and local community tradition

Arizona Trail ultra through the Madrean Sky Islands, with wide-open high desert views stretching toward Mexico.

Winter loops or out-and-back segments on horse, snowmobile, or Ice Age and Scuppernong trails, with flexible routing based on trail and weather conditions

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