100mi
Terrain
Format
Course
Distance
1
Elevation
Difficulty
Cutoff
≥
:
Continent
Country
Year
Season
Month
UTMB Qualification
357 races
Jul 4-6, 2026 (Sat-Mon)
Bamburgh, North East, United Kingdom
Fully waymarked and supported 100-mile route with a relaxed 2.5 mph pace requirement
Jul 4, 2026 (Sat)
Atlanta, Georgia, United States
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
Jul 10-11, 2026 (Fri-Sat)
Fairplay, Colorado, United States
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
Jul 10-13, 2026 (Fri-Mon)
Adams, Massachusetts, United States
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
Rockford, Michigan, United States
Team relay journey covering 50, 100, or 200 miles on fully paved White Pine Trail, featuring woodlands, countryside, lakeside views, and historic rail route
Jul 10, 2026 (Fri)
Silverton, Colorado, United States
102.5-mile loop in Colorado's San Juan Mountains, 33,000 feet of climbing, 13 mountain passes, technical terrain, summit of Handies Peak at 14,048 feet
Jul 11, 2026 (Sat)
Wenatchee, Washington, United States
High desert landscape with intense heat, steep gulches, massive rock hoodoos, significant elevation changes, and dry, challenging terrain
Lanesboro, Pennsylvania, United States
Rugged, moderately difficult out-and-back laps on an unpaved rail trail with 1000 feet elevation change per lap and uneven terrain.
Crowsnest Pass, Alberta, Canada
Rugged 100-mile and 50-mile courses winding through Alberta’s Rocky Mountains, featuring over 6,600m of elevation and seven distinct stages
Kingman, Kansas, United States
100-mile road race featuring self-support requirements, minimal aid, and extreme endurance demands across a remote course with limited replenishment points
Jul 11-12, 2026 (Sat-Sun)
Vero Beach, Florida, United States
Eight out-and-back segments from a central hub, spanning Vero Beach and Sebastian, with tropical waters, jungles, rugged trails, and 22 bridge crossings
Llangynidr, Wales, United Kingdom
100-mile South Wales trail race featuring Black Mountains and Brecon Beacons scenery, challenging elevation, and two 50-mile route options.
Tulsa, Oklahoma, United States
Scenic nighttime route along Tulsa’s RiverParks asphalt trails, illuminated Arkansas River crossings, urban landmarks, and riverside views
Smithville, Texas, United States
Repeated 10K pine-forest circuit at Rocky Hill Ranch, with singletrack, rolling hills, intermittent shade, and long-format options from 50K to 200K.
Jul 17, 2026 (Fri)
Ouray, Colorado, United States
Steep, technical 100-mile route through Colorado’s rugged San Juan Mountains, renowned for extreme difficulty and a strict no-frills ethos
Jul 17-18, 2026 (Fri-Sat)
Salida, Colorado, United States
101-mile loop in Colorado’s Sawatch Range with 23,500 feet of climbing, high alpine passes, ghost towns, and sweeping ridges on the Continental Divide
Easton, Washington, United States
100-mile course with 23,000 feet of elevation gain, 32 miles on the Pacific Crest Trail, and a 2.3-mile section through Snoqualmie Tunnel
West Windsor, Vermont, United States
100-mile Vermont trail race with 17,000 feet of elevation gain, rolling hills, country roads, forested trails, and southern Green Mountains scenery
Chillicothe, Illinois, United States
Scenic Illinois River trails with 100 mile, 100k, and 50k options; roughly 23,500 feet of elevation gain and rustic woodland terrain at Camp Wokanda
Challenging looped course through wooded ridges and river valley along Illinois River Bluff Trail, with significant elevation gain and summer heat.
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