October ultramarathons in United States (South)

Night trail loops under the brightest full moon, marked courses of 3.3 or 4.17 miles, 8-hour lap challenge and 12-hour Last Runner Standing format

Rugged Pisgah singletrack featuring iconic trails like Black Mountain, Turkey Pen Gap, Laurel Mountain, and Pilot Rock

10-mile loop on Blue Wing, Koasati, and Whoa Mule trails with flat, muddy paths, tree roots, and views of Lake Bistineau and cypress forests

Three-loop 50K on North Georgia singletrack, with 5,000 ft of climbing, rocky ascents, technical stretches, stream crossings and waterfalls.

24-hour USATF sanctioned run on a rubberized track in Mt. Pleasant, featuring shaded lanes, day and night laps, and a lively, social race atmosphere

Rocky ascents and descents along shaded and open trails with lake views at Dana Peak Park; single-loop courses with minimal trail repetition.

6.5-mile figure-eight loop through Prince William Forest Park, with singletrack, fire road, rolling terrain, and about 650 feet of climb per loop.

Scenic Ouachita Mountains route featuring forest roads, rugged jeep trails, and 12,000 feet of elevation across runnable, deceptively tough hills

Multiple-loop 50K course through Coopers Rock woodlands, with 687 feet elevation gain per 10K segment and a sustained Category 4 climb

Extensive USNWC trails, single-track climbs, and riverside paths; 50k or 50-mile options with looped courses and technical terrain; Pump House Biergarten start/

Rugged 10K singletrack loop in Coopers Rock State Park, 687 feet elevation gain per lap, wooded terrain, Category 4 climb, festive start/finish area

Historic Bartram Trail route from downtown Franklin into the mountains, with steep climbing, 8,500+ feet of gain, and a scenic Wayah Bald section.

Hilly jeep road loops on 1North Adventure Trails, hourly 3.5-mile circuits, night running emphasis, flexible pacing, festive atmosphere, pancake breakfast

Flat, one-mile crushed gravel loop with gentle grass shoulder, soft and rock-free terrain, welcoming park setting, seamless lap tracking

Looped 1-mile course through scenic Damascus parkland, festival atmosphere with live music, food trucks, and adjacent campsites

50K on the Croom Hiking Trail through longleaf pine forest, scrub oak hills, creek bottoms, and cypress ponds in central Florida

Flat 5K out-and-back loops on the tree-lined Cecil Field Recreational Trail, with Tent City access and a fixed-hourly-start 50K format

Birthplace of the Backyard Ultra featuring the iconic 4.1667-mile loop, historic venue for world record performances and legendary endurance showdowns

Urban team run between Jacksonville Wawa stores, item collection and community support with relaxed, non-competitive routes

Multi-day mountain stage race around Spruce Knob, with 50k and 50-mile options, rugged Appalachian trails, big elevation, and remote high-country terrain.