24hr ultramarathons in United States (West)

Rugged mountain trails in the Laramie Range with a 2,800-foot climb to Laramie Peak’s 10,200-foot summit and alpine views

Looped 1.3-mile course featuring trail, grass, and bike path segments in Montgomery Waller Community Park, near Imperial Beach and Chula Vista

Track-based ultra at Newport High School featuring 24-hour, 12-hour, and 50K distances, with 125 laps marking the 50K finish

Non-technical 2.6-mile gravel loop around Lake Padden with 150 feet of elevation gain, winding through classic Pacific Northwest forest scenery.

Relatively flat double-track route through farm fields, mountain vistas, and nighttime city lights in Three Forks, MT, with livestock along the course

1-mile loop on hard packed dirt, grass, gravel, and asphalt in Bush’s Pasture Park, gentle terrain with central aid station and accessible crew area

Last-person-standing format inspired by the original Backyard Ultra concept, testing endurance through successive timed laps

Flat, fast 1.68-mile gravel loop at Missoula County Big Sky Park, with minimal elevation change and wide-open mountain range views.

Nighttime loops on a 1.58-mile dirt and wood chip trail, with options for 50K or 24-hour distances, self-supported format, running or rucking

Flat 3.1-mile loop on gravel, dirt, grass, and paved surfaces at Kearin Family Farm, with central aid and easy crew access for ultradistance challenges.

Timed ultra on a 1-mile loop at Donald Farm, shifting from Warrior Expo crowds by day to a quiet overnight test of persistence.

Demanding hybrid format with required lifts, assigned 50K or 100K runs, and a final challenge under accumulated fatigue

Scenic, flat 1.05-mile loop with ultra-distance options and generous time limits, designed for fast times and all experience levels

Demanding 2-mile loop with 320 feet of elevation gain per lap on varied terrain, 24-hour and 12-hour ultramarathon options, open field event hub with full aid

Looped 0.85-mile paved bike path through scenic Auburn, with picturesque ponds, shaded stretches, and multiple distance options

10 km dirt singletrack loop on a private cattle ranch, moderate climbs and sweeping views, well-stocked aid stations, overnight camping and evening bonfires

1.5-mile loop at Gallatin Valley Regional Park with minimal elevation gain, fixed time format options of 24, 12, or 4 hours

Scenic 0.82-mile loop at 7,240 feet on the Palmer Divide, surrounded by mountain views; community-focused 24-hour ultrarunning event

One-mile hard-packed dirt loop with direction changes every four hours, frequent aid stations, and personal camp support throughout timed ultra options.