202720 Mar
Chilterns, England
Hundred Hills 50K
Two different 25 km loops through the Chilterns, starting and finishing at Stonor Park.
50 kmTrail · ContinuousExplore race
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From the first 50K to a week in the desert. Compare the details and find an adventure that feels like yours.
35 races to explore
Check dates are shown on each race page20272 Apr
Sahara Desert, Morocco
MDS Legendary
A desert event with approximately 250 km across six stages. Participants carry their own food and equipment.
Approx. 250 kmDesert · Stage raceExplore race
202710 Apr
Worthing to Eastbourne, England
South Downs Way 50
A marked 50-mile route joining the South Downs Way and continuing east to the finish in Eastbourne.
50 milesTrail · ContinuousExplore race
20271 May
Richmond to Oxford, England
Thames Path 100
A continuous route beside the Thames, from Richmond to Oxford, on a mixture of trails and paved paths.
100 milesTrail · ContinuousExplore race
202712 Jun
Winchester to Eastbourne, England
South Downs Way 100
A long journey along the South Downs Way, following the chalk ridge from near Winchester to Eastbourne.
100 milesTrail · ContinuousExplore race
202719 Jun
West Dean Gardens, England
Race to the King
Choose a route from West Dean Gardens, with coastal and South Downs loops among the options.
50 / 80 / 100 kmTrail · ContinuousExplore race
202710 Jul
The Ridgeway, England
Race to the Stones
Follow the Ridgeway towards Avebury, with 50 km options and 100 km offered continuously or over two days.
50 / 100 kmTrail · Continuous / Stage raceExplore race
NEXT EDITIONAwaited
Courmayeur to Chamonix, Alps
CCC · UTMB Mont-Blanc
An Alpine route from Courmayeur to Chamonix. The page we checked describes the completed 2026 edition.
2026 course reference. New dates not verified.108 km (2026 course)Mountain · ContinuousExplore race
202711 Sept
Putney to Henley, England
Thames Path Ultra Challenge
A supported towpath weekend from Putney towards Henley. You can self-fund a place or take a charity place with a fundraising target.
50 / 75 / 100 kmTrail · Continuous / Stage raceExplore race
202710 Jan
Edale to Kirk Yetholm, Pennine Way
Montane Winter Spine
A non-stop winter race along the Pennine Way, from Edale to Kirk Yetholm. The organiser says it is not a beginner event.
268 milesMountain · ContinuousExplore race
202726 Jun
Olympic Valley to Auburn, California
Western States 100
The famous lottery-entry 100-miler across the Sierra Nevada, from Olympic Valley to Auburn. Our full guide covers entry odds, cutoffs, crew rules and records.
Full race guide100.2 miles (161 km)Mountain · ContinuousExplore race
202713 Feb
Spring Valley to New River, Arizona
Black Canyon 100K
A fast, net-downhill desert 100K on the Black Canyon Trail and a Golden Ticket race for Western States. Our full guide covers entry, cutoffs and crew rules.
Full race guide100 km and 50 kmTrail · ContinuousExplore race
NEXT EDITION2027, date not announced
Frozen Head State Park, Tennessee
Barkley Marathons
Five unmarked loops in 60 hours, with books for checkpoints and a secret entry. Only 20 runners have ever finished. Our guide explains how it works.
Full race guideFive loops, officially 100 milesMountain · LoopExplore race
20274 Apr
Sahara Desert, southern Morocco
Marathon des Sables
The original self-sufficient desert stage race. Our full guide covers the cost, stages, food and water rules, mandatory kit and results.
Full race guideAbout 250 km in six stagesDesert · Stage raceExplore race
20279 Jul
Silverton, Colorado
Hardrock 100
A lottery-entry 100-mile loop over 13 high passes in Colorado's San Juan Mountains. Our full guide explains the lottery pools, service hours and course.
Full race guideAbout 102 miles (164 km)Mountain · ContinuousExplore race
202716 Oct
Bell Buckle, Tennessee
Big's Backyard Ultra
The original backyard ultra and its world championship: a loop every hour until one runner is left. Our guide covers the rules, qualifying and records.
Full race guide4.167 miles every hour, open-endedTrail · BackyardExplore race
20278 Oct
Moab, Utah
Moab 240
A single 241.8-mile loop through the canyons and mountains around Moab, with sleep stations and a January lottery. Our guide covers entry, cutoffs and what happened in 2026.
Full race guide241.8 miles (389 km)Desert · ContinuousExplore race
20272 May
Black Canyon City to Flagstaff, Arizona
Cocodona 250
A 253.5-mile point-to-point across Arizona, from the desert to Flagstaff, streamed live for five days. Our guide covers the lottery, sleep stations and records.
Full race guide253.5 miles (408 km)Mountain · ContinuousExplore race
NEXT EDITIONJune 2027, dates to be announced
Olympic Valley, California
Broken Arrow Skyrace
A June festival of steep skyraces at Palisades Tahoe, with a ladder, hand lines and snow. Our guide covers the races, registration and results.
Full race guide46K, 23K and shorter racesMountain · ContinuousExplore race
NEXT EDITIONWorld Series final in Germany, August 2027
Germany (venue kept secret)
Last Soul Ultra
A secret-venue backyard ultra in Germany, streamed live to millions. Our guide covers the format, the 2026 results and the 2027 World Series.
Full race guide6.706 km every hour, open-endedTrail · BackyardExplore race
202721 Jun
Stateline, Nevada (Lake Tahoe)
Tahoe 200
A single 200.4-mile loop around Lake Tahoe on the Tahoe Rim Trail, with sleep stations and a June lottery. Our guide covers entry, cutoffs and records.
Full race guide200.4 miles (322.5 km)Mountain · ContinuousExplore race
202713 Jun
Pietermaritzburg to Durban, South Africa
Comrades Marathon
The 100th Comrades in 2027: a road ultra of about 90 km from Pietermaritzburg to Durban. Our guide covers qualifying, cutoffs, medals and records.
Full race guideAbout 89 to 91 kmRoad · ContinuousExplore race
NEXT EDITIONLate summer 2027, dates to be announced
Chamonix, France
UTMB Mont-Blanc
The week of races around Mont Blanc and the UTMB World Series finals. Our guide compares the races and explains Running Stones, the lottery and kit.
Full race guide174 km UTMB, plus CCC, TDS, OCC and moreMountain · ContinuousExplore race
202719 Jul
Death Valley to Whitney Portal, California
Badwater 135
An invitation-only 135-mile road race from Death Valley to Mount Whitney in July heat. Our guide covers applying, crew rules, cutoffs and records.
Full race guide135 miles (217 km)Road · ContinuousExplore race
202724 Jul
Snowbird, Utah
Speedgoat 50K
A mountain 50K at Snowbird ski resort that crosses Hidden Peak at 11,000 feet twice. Open entry, UTMB World Series.
Full race guide50 km (32.5 mi on the aid chart)Mountain · ContinuousExplore race
202717 Sept
Steamboat Springs, Colorado
Run Rabbit Run 100
A Colorado mountain 100 with two divisions: Hares racing for a $350,000 purse and Tortoises with pacers and more time.
Full race guideAbout 101.5 miles (163 km)Mountain · ContinuousExplore race
202724 Sept
Logan to Garden City, Utah
Bear 100
A point-to-point mountain 100 from Logan to Bear Lake in the autumn colours. Lottery entry with a qualifier and trail-work requirement.
Full race guide100 miles (161 km)Mountain · ContinuousExplore race
202721 Aug
Leadville, Colorado
Leadville Trail 100
The Race Across the Sky: an out-and-back 100 from Leadville over Hope Pass twice. Lottery or guaranteed routes, no qualifier.
Full race guide99.7 miles (160 km)Mountain · ContinuousExplore race
202710 Sept
Kaysville to Midway, Utah
Wasatch 100
A point-to-point 100 along the Wasatch crest and the last race of the Grand Slam. Lottery entry plus 8 hours of trail work.
Full race guide100 miles (161 km)Mountain · ContinuousExplore race
202717 Jul
West Windsor, Vermont
Vermont 100
A 100-mile and 100K race on Green Mountain dirt roads and trails, shared with a horse ride. All proceeds go to Vermont Adaptive.
Full race guide100 miles or 100 kmTrail · ContinuousExplore race
202713 Aug
Mount St. Helens to Randle, Washington
Bigfoot 200
A point-to-point 200-miler from Mount St. Helens across the Cascades, with sleep stations and a 107-hour cutoff.
Full race guide200.1 miles (322 km)Mountain · ContinuousExplore race
NEXT EDITIONSeptember 2027, dates to be announced
Courmayeur, Aosta Valley, Italy
Tor des Géants
A non-stop loop of the Aosta Valley high routes with six life bases and 150 hours. Lottery entry with country quotas.
Full race guide330 km advertised (336.5 km in 2026)Mountain · ContinuousExplore race
NEXT EDITIONSeptember 2027, date to be announced
Athens to Sparta, Greece
Spartathlon
A non-stop road race from the Acropolis to Sparta on the route of Pheidippides, with a qualifier, a lottery and a cutoff at every checkpoint.
Full race guideAbout 246 km (153 miles)Road · ContinuousExplore race
202621 Nov
Boonsboro to Williamsport, Maryland
JFK 50 Mile
America's oldest ultra, on the Appalachian Trail, the C&O Canal towpath and country roads. Open entry that sells out.
Full race guide50.2 miles (81 km)Trail · ContinuousExplore race
202631 Oct
McDowell Mountain Regional Park, Arizona
Javelina Jundred
A costumed Halloween-weekend 100-mile and 100K on desert loops near Phoenix, and a Western States Golden Ticket race.
Full race guide100 miles or 100KDesert · Continuous / LoopExplore race
A small, curated directory of UK, European, US and desert events. Dates and routes can change; check the official participant information before entering.
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