Intermediate ultramarathons in United States (Gulf Coast)

Eight out-and-back segments from a central hub, spanning Vero Beach and Sebastian, with tropical waters, jungles, rugged trails, and 22 bridge crossings

Night trail route through rugged hills and dry southern terrain under a vast starry sky at South Llano River State Park

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

Night-time ultramarathon on rugged hilly ranch trails in Gilmer, Texas, featuring dirt singletrack, creek crossings, varied elevation, and self-supported racing

Sugar sand dunes of coastal southeast Florida, mini-game style challenges, 24-hour and half marathon options, peak summer heat, varied difficulty levels

Boardwalk and forest trails through cypress and tupelo swamps, mixed hardwoods, and along the Tickfaw River in Tickfaw State Park

Smooth 1.64-mile paved loop with minimal elevation gain, limestone bluffs and oak hills, USATF-certified course under the Buck Moon in Pace Bend Park

54K route on the 12-mile DORBA trail at Cedar Hill State Park, moderate to challenging terrain through forests and grasslands by Joe Pool Lake

Night-long 100k loop through Talladega Forest on rolling dirt and gravel roads, starting at Frog Pond Overlook, with alternating course direction each year.

Extensive elevation gain, large rock domes, diverse single track, exposed and wooded sections, steep hills, and technical terrain

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

Challenging technical trails and scenic views across a vibrant 1400-acre venue on Labor Day weekend, featuring trail runs, mountain biking, and outdoor festival

Out-and-back ultramarathon along the Pinellas Trail from St. Petersburg to Tarpon Springs and Dunedin, covering over 46 miles of scenic Florida landscapes.

Flat, mostly grassy 2.5-mile loop with gentle hills at Escambia County Equestrian Center, minimal elevation change and easy crew access

Point-to-point route featuring 31 miles of single track on the Appalachian Chain, doubletrack and forestry roads, ending near Lake Howard

Mostly flat and fast out-and-back route on the NETT Trail, mixed terrain with bridge crossings, starting and finishing at Paris's Eiffel Tower.

Challenging, dirty and rocky single and wide track trails with 1400 feet of elevation gain per 15-mile loop at Flat Creek Crossing Ranch near Austin, Texas

Rocky trails and rugged hills in South Llano River State Park, dry southern climate, night race beneath a starlit sky

Challenging 100-mile urban route through vibrant Miami neighborhoods, historic districts, farmlands, and scenic spots; navigation-based, no aid stations

Challenging trail run through Palo Duro Canyon with steep elevation changes, vibrant rock formations, and varied surfaces of sand, clay, and sandstone.