Summer ultramarathons in United States (East)

16.5-mile loops through Finger Lakes National Forest, single-track trails, grassy pastures, dirt and paved roads, 1292 feet elevation gain per loop

Scenic Kennesaw Mountain course passing historic sites, wooded trails, gravel, and asphalt, featuring sunrise and sunset views along an 8-mile out-and-back loop

60k course with 1,600 feet of elevation gain on the varied trails of Red Wing Recreation Area in Lagrangeville, NY

Ferry start on the Mississippi, 314 miles across highways, backroads, and summer heat from Missouri to Georgia, fully self-supported

Scenic 1.9-mile loop at Notchview with a 0.2-mile climb, rolling single and double track, open fields, and cross-country ski trails

Paved 1-mile loop with gentle elevation, direction changes, and a fully stocked aid station at the start/finish area

Looped nighttime miles on runnable single-track dirt trails through cedar and hardwood forests along the Duck River, glowing with reflective markers

Casual-paced ultrarun emphasizing camaraderie, pedestrian-friendly routes, and essential self-supported hydration, with unique aid stops along the course.

Steep switchbacks in lush forests, ski slopes with panoramic vistas, and expansive fields across a 5-mile loop with 810 feet of elevation change

Mostly flat 3.5-mile gravel loop on Back Cove Trail, circling a tidal estuary with scenic views and a short paved bridge crossing

Six-loop 50K on technical, rocky singletrack with roots, foot bridges, over 4,000 feet elevation gain, minimal doubletrack, and frequent aid access

Rugged, moderately difficult out-and-back laps on an unpaved rail trail with 1000 feet elevation change per lap and uneven terrain.

Rugged 100-kilometer course through the wild trails of the Alleghenies, rocky ridges, sparse aid stations, and punishing midsummer heat

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

Scenic Finger Lakes hills and valleys, swamplands to hilltops, steep descents, gully rim trails, finishing at the culturally significant Great Hill

Rolling grassy hills on a compact cross country loop with team relay format, dusk headlamps required, and awards for most laps completed

Historic Starrucca Viaduct start, four 25-mile out-and-back laps on a primarily flat stony rail trail with gradual elevation changes and trestle dips

Approximately 3.4-mile trail loop at Windsor Castle Park with 150 feet of elevation gain per lap, self-aided format, and a relaxed summer atmosphere

1.776-mile loop through historic Putnam Memorial State Park, featuring multiple timed race options in a landscape tied to Revolutionary War history