50K October ultramarathons in United States (South)

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

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

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.

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

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.

Canopied, rolling terrain and lakeside views within the Birch Creek Unit, starting and finishing at a grassy lakeside setting

Non-technical single-track dirt trails around Lake Yahou, with rocks, roots, mountain views, and well-placed aid stations

50K loop with technical single track, creek crossings, and steep climbs in the North Georgia mountains; stretches along Benton MacKaye Trail and autumn scenery

Out-and-back gravel trails with moderate elevation changes, unpredictable weather, and a welcoming course design

Rugged mixed-terrain loop around Waterloo Lake, with dirt, rocks, roots, water views, and a cave along the course.

Trail loops around Couchville Lake and Bryant Grove, varied terrain on Jones Mill, rolling and flat sections, wildlife in a scenic state park setting

Varied single track and jeep paths through old growth woods, lakes, and rolling hills on a 1,000-acre private ranch, with gravel, dirt, sand, and roots

Scenic trail loops at High Hope Ranch and Eco-Retreat, combining 3.3- and 7-mile sections for a 10.3-mile lap with moderate difficulty and spaced aid stations.

Scenic Hill Country ranch terrain on well-marked 10.5-mile loops with spaced aid stations, challenging 100K and 50K distances, camping available

One-mile loop course carrying a 20-pound kettlebell, with decreasing time limits and elimination after each lap; custom kettlebell trophies for top finishers