February ultramarathons in United States (South)

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

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

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.

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

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

Dirt and gravel roads, leaf-covered four-wheel drive paths, 4,500 feet of elevation gain, multiple water crossings, remote Cookson Hills landscape

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

Timed 6- or 12-hour format on a 5K lap loop, with hourly cutoffs and progressive elimination

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