Ultramarathons in North America

Nighttime endurance laps on an illuminated dirt horse track at Harrison County Fairgrounds with continuous chip timing and flexible distance

Hilly 50KM double-loop trail race on runnable gravel and mixed tracks, seven major climbs per loop, river valley ascents, and rugged scenic terrain

Rocky out-and-back course through Bear Valley and Lake Spaulding, steep ascents on Signal Peak loop, challenging terrain with rugged segments

Mountain trail course with 5,000 feet of climbing over three ridges and panoramic views throughout the 50-mile route

Technical singletrack and rolling fire roads through shaded oak groves and exposed hillsides, with sweeping Bay Area views and a challenging elevation profile

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

Winding singletrack and grassy pasture loops by day, gravel road course at night on a historic Manitoba family farm

Varied trail course through lakesides, wetlands with beaver dams, steep inclines, creeks, and mud holes in the Limberlost Forest Reserve

High-elevation 50k traversing Grand Targhee's renowned trails and ridgelines, with sweeping mountain views

Scenic Sammamish River Trail out-and-back with steep early descent, bridge crossing, fields at 60 Acres Park, and multiple parkway turns

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

Technical single track climbs on Bells Mountain, stream crossings, waterfalls, and views of Mt. St. Helens along the Tarbell Trail to Moulton Falls Arch Bridge.

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

Scenic waterfront course from Magnolia to Lincoln Park, blending trails and urban routes with views of Elliott Bay, Myrtle Edwards Park, and city landmarks

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

High-altitude trails above 10,000 feet through alpine meadows, ghost towns, and mining relics, with sweeping views of the South Park Valley and Decalibron peaks

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

Relay race route from near the Canadian border to Whidbey Island, featuring scenic stretches through the Seattle region.

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