Relay ultramarathons in United States (South)

Repeated 10K pine-forest circuit at Rocky Hill Ranch, with singletrack, rolling hills, intermittent shade, and long-format options from 50K to 200K.

Six-hour endurance format at Greenbury Point, with Chesapeake Bay waterfront views and an exposed coastal setting.

Looped cross-country and single track trails with small hills at Mississippi College Choctaw Trails; intense heat and humidity expected

Flat 1.25-mile paved loop on a former military base with asphalt, concrete, a brief gravel section, and shady pine trees

Overnight looping relay and ultra at Kroger Field, with a paved course and a grassy, trail-like section for added variety.

Rolling, shaded 2.6-mile loop with cart paths, wooden bridges, waterfalls, and riverside views at Riverwest Nature Preserve; strict lap cutoffs in summer heat

Night trail loops on undulating 3.2-mile course at Cedar Ridge Preserve, featuring wooded terrain, varying elevation, and multi-hour endurance format

Scorching summer heat and technical ranch trails across 1,100 acres at historic 7IL ranch, including 100-mile and 100km ultramarathon relay distances

208-mile relay journey through Blue Ridge Mountains scenery, wild pony habitats, peaceful country roads, and iconic spots like the Blue Ridge Parkway

Six-loop, 62-mile single-track course on Meeks Mountain Trails with challenging mountain terrain in Hurricane, West Virginia

Point-to-point mountain ultra traversing technical singletrack, fire roads, and steep climbs between Pilot Mountain and Hanging Rock with over 7,500 feet of asc

Scenic 3-mile loop through fields and woods beside Cherokee Lake, featuring wide and single-track trails, wooden bridges, and cross country-style terrain

12-hour loop around Lake Hollingsworth on paved walkways, 2.84-mile laps, solo or relay, lakeside views, hot food, and a capped field

Short-loop .33-mile course around baseball park concourse, 24-hour format, open breaks, overnight atmosphere with movies and activities

Scenic rails-to-trails course along the New River with vibrant fall foliage, historic train trestles, gentle dirt and crushed gravel path, and minimal elevation

Overnight team relay covering 205 miles from Eureka Springs through the Ozark National Forest and five state parks, finishing at Prairie Grove Battlefield

Flat 2-mile loops on Trinity River trails, mostly pavement with optional grass, centered on close-up crowd energy at Martin House Brewery.

Loop-based timed ultra in Wisconsin’s Southern Kettle Moraine Forest, with solo or relay laps shaped by endurance, pacing, and strategy.

Three-loop 50K featuring rugged singletrack climbs, ridge traverses, gorge views, tranquil lake stretches, and 2,600 feet of elevation gain in Rocky Gap State