Worldwide 2017 – 2018 Ultramarathon Calendar

Looking for a comprehensive guide to 2017 – 2018 ultramarathons organized around the world? You can browse our list of half marathons or filter down the selection to a specific location, month or type of race. You’ll find iconic 100 milers, shorter races to test yourself in the ultra world, road races, mountain races, races in deserts. The diversity of ultra races is really amazing.

We consider any race longer than 42.195km or 26.1mi to be an ultramarathon if it is run in a single stage. If you’re looking for races that have a specific fixed duration (ex : 24hr races), you can check the X-hour race calendar. If you like races run on several stages across several days, check our Multiday race calendar

If you’re looking for new 2013 – 2014 ultramarathons to compete in, this is the place to start searching. More than 1,800 ultramarathons are listed in over 75 countries around the world.

3,267 races

Coldwater Rumble

100 Mile Trail Run
January 21, 2017 Race day in 4 days
USA / Mountain Region / Arizona / Goodyear
Ultramarathon - 100 miles
Desert Trail Aravaipa Running

24H 2017

January 21, 2017 Race day in 4 days
Malaysia / Serdang
Ultramarathon - 24 hours

Go Short Go Long Go Very Long 5k, 10k, 25k, 50k, 50k 2-Person Relay

2-Person 50K Relay
January 21, 2017 Race day in 4 days
USA / West South Central / Oklahoma / Tulsa
Ultramarathon - 50 kilometers
Relay

Pullman Winter Ultra Series - January

50K
January 21, 2017 Race day in 4 days
USA / Pacific / Washington / Pullman
Ultramarathon - 50 kilometers

Miracle Match Marathon

50K
January 21, 2017 Race day in 4 days
USA / West South Central / Texas / Waco
Ultramarathon - 50 kilometers

Capitol Peak Mega-Fat Ass

50K
January 21, 2017 Race day in 4 days
USA / Pacific / Washington / Olympia
Ultramarathon - 50 kilometers
Trail

Southern Tour Ultra

50K
January 21, 2017 Race day in 4 days
USA / South Atlantic / North Carolina / Wilmington
Ultramarathon - 50 kilometers
Flat Trail

Southern Tour Ultra

50 Mile Relay
January 21, 2017 Race day in 4 days
USA / South Atlantic / North Carolina / Wilmington
Ultramarathon - 50 miles
Flat Trail Relay

Coldwater Rumble

52K
January 21, 2017 Race day in 4 days
USA / Mountain Region / Arizona / Goodyear
Ultramarathon - 52 kilometers
Desert Trail Aravaipa Running

Coldwater Rumble

52 Mile
January 21, 2017 Race day in 4 days
USA / Mountain Region / Arizona / Goodyear
Ultramarathon - 52 kilometers
Desert Trail Aravaipa Running

Antarctic Ice 100k

January 21, 2017 Race day in 4 days
Antartica / Patriot hills
Ultramarathon - 100 kilometers
Trail Snow

Ultra Trail d’Angkor

Bayon Trail Angkor 64 km
January 21, 2017 Race day in 4 days
Cambodia / Angkor
Ultramarathon - 64 kilometers
Package tour Trail

Crystal Springs Trail Run

Crystal Springs 50 Km Trail Run
January 21, 2017 Race day in 4 days
USA / Pacific / California / Woodside
Ultramarathon - 50 kilometers
Coastal Trail Runs Hilly Trail

Frozen Dead Guy 50km

January 21, 2017 Race day in 4 days
USA / Mountain Region / Colorado / Nederland
Ultramarathon - 50 kilometers
Trail Mountain Snow

Green Power Hike

Green Power Hike 50K
January 21, 2017 Race day in 4 days
Hong-Kong / Hong-Kong Trail
Ultramarathon - 50 kilometers
UTMB Qualifier Walk Trail Relay