12hr 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

Scenic alpine 10K loop with 1,546 feet of vertical gain per lap, technical trails through aspen groves and meadows at Powderhorn Mountain

2km out-and-back laps on the Thumb Open Space trail, with 540 feet of climbing each lap and a sustained focus on vertical gain.

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

Scenic loop route on dirt fire trails with modest elevation gain and classic trail ambiance

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

Time-based ultrarun in Napa's Skyline Wilderness Park, 4.16-mile trail loop with 815 feet of gain per lap through rolling hills and historic landscapes

Overnight time-based event on Casper Mountain’s forested summit trails, featuring solo and relay options with flexible pacing and lap format.

Scenic 2-mile loop featuring flat beachside paths, demanding forested single-track climbs, Puget Sound views, and local wildlife sightings

Flat 500-meter USATF-certified crushed gravel loop at Nardini Manor, overnight hours on scenic, illuminated grounds

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

Scenic 5K loop through ancient forests and along Deep Lake, mix of wide trails and single track, about 100 feet elevation gain per loop

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