February ultramarathons in United States (East Coast)

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

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

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.

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

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

Shaded 4.3-mile singletrack loop in Little Bennett Regional Park, with 5- and 9-hour timed formats and on-course aid station in Clarksburg, MD

Two-loop 50K in Anne Springs Close Greenway: technical singletrack, gravel and dirt trail, creek crossings, mud, and a rugged old-school feel.

Remote South Florida trails through wetlands, wet prairies, cypress domes and pine flatwoods in the protected DuPuis Management Area.

Looped course on a 2-mile smooth, gently rolling single track trail with central aid station support

Scenic 5K lakeside loop along Lower Lake with tranquil water views, peaceful natural backdrop, and a relaxed, low-key atmosphere

24-hour USATF-sanctioned run on a shaded Mt Pleasant track, rubberized surface, optimal race temperatures, selection based on ultra-distance credentials

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

Three distinct five-mile color-coded loops through wooded trails with all starts and finishes at Powissett Lodge

Multiple 5K trail loops at First Landing State Park from sunrise to sunset, solo or team relay format

Demanding 110-mile course over mixed terrain, manual timing for 83.5 miles followed by a chip-timed marathon finish; significant endurance challenge.

Multi-day ultra event at Clay County Regional Sports Complex with ample self-crewing space, flat venue terrain, and festive community atmosphere