50K 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

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

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

Flat sun-baked trails through Harns Marsh with soaring summer temperatures and challenging heat on Florida terrain

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

After-dark 50K on rooty dirt singletrack through Tyler State Park’s East Texas pines, with rolling hills, narrow wooded trails, and 900 ft gain per loop

Nighttime trail run across Guadalupe River State Park’s grasslands and woodlands, featuring star-lit paths and diverse natural scenery

Rugged, heat-defined 24-hour and 48-hour ultra with smart pacing, cooler nighttime hours, and a laid-back, communal atmosphere

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

Rugged dirt trails with rolling terrain through Land Heritage Institute, technical night running under the stars, single and wide track routes

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

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

Ten 5k laps in 24 hours on a repeat course, self-supported through Mississippi summer heat at RunStrong Training Center

Single track trails, ranch roads, field crossings, and water crossings on a 2800-acre working cattle ranch in the Texas Hill Country

Technical Camp Eagle trails, rugged terrain, scenic 1400-acre venue, multi-day trail sports festival with running, rucking, and mountain biking options

2.5-mile grass and dirt loop with gentle terrain and minimal elevation, set within 178 scenic acres at the USATF-sanctioned Escambia County Equestrian Center.

Flat, shaded urban paved trail with multiple out-and-back laps and open street crossings; low-key atmosphere, no crowds, generous time limit

Private ranch route with extremely steep hills, significant elevation changes, and closely spaced aid stations for early September heat

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