February ultramarathons in United States (Southeast)

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

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

Single-track trails through 6,000 acres at Guntersville State Park, featuring bluff overlooks, mountain and lake scenery, and multiple spectator access points.

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

Single-track 50k route through Jefferson Memorial Forest, challenging elevation, seasonal trail conditions, and Louisville skyline views

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

Fast and flat USATF-certified rails-to-trail course on Five Mile Creek Greenway, connecting Fultondale, Gardendale, and Brookside north of Birmingham

Flat, gravel route along the historic Eureka Trail through woodlands and rural landscapes, ending near Englewood

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

Out-and-back 50k along the White River with 14.5 miles of trail, a mile of pavement, and two water crossings near the 2-mile and 30-mile marks.