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.

3,271 races

Athens International Ultramarathon Festival

1000K
February 02, 2017 The race has already taken place.
Greece / Athens
Ultramarathon - 1000 kilometers
Charity

Athens International Ultramarathon Festival

1000 miles
February 02, 2017 The race has already taken place.
Greece / Athens
Ultramarathon - 1000 miles
Charity

100 Bornes du Père Noël

December 16, 2016 The race has already taken place.
French Guiana / Kourou
Ultramarathon - 100 kilometers
Relay

100 Capital Classic

100 Capital Classic - 100 Mile
September 23, 2017 Race day in 4 months
South Africa / Pietermaritzburg
Ultramarathon - 100 miles

C.U.R.E Ultra's

100K
April 29, 2017 The race has already taken place.
USA / Mountain Region / Colorado / Chatfield State Park, Littleton
Ultramarathon - 100 kilometers
Trail

DoubleTop 100

100k
April 22, 2017 The race has already taken place.
USA / South Atlantic / Georgia / Ft Mountain State Park
Ultramarathon - 100 kilometers
Hilly Fun Trail Fast

Sun Mountain

100K
May 20, 2017 The race has already taken place.
USA / Pacific / Washington / Winthrop
Ultramarathon - 100 kilometers
Trail Rainshadow Running

Lovers Leap of Faith

100K
July 01, 2017 Race day in about 1 month
USA / Pacific / California / Strawberry
Ultramarathon - 100 kilometers

Angel Fire Endurance Run

100K
June 17, 2017 Race day in 19 days
USA / Mountain Region / New Mexico / Angel Fire
Ultramarathon - 100 kilometers
Trail Mountain

Mo' Bell

100K
August 05, 2017 Race day in 2 months
USA / East South Central / Tennessee / Burns
Ultramarathon - 100 kilometers

THEAGENIOS THASSOS ULTRA 100

100k
April 22, 2017 The race has already taken place.
Greece / THASSOS ISLAND
Ultramarathon - 100 kilometers

Pistol Ultra Run

100K
December 31, 2016 The race has already taken place.
USA / East South Central / Tennessee / Alcoa
Ultramarathon - 100 kilometers

Plain 100 Mile Endurance Run

100K
September 16, 2017 Race day in 4 months
USA / Pacific / Washington / Plain
Ultramarathon - 100 kilometers
Trail

100 Not Yo Momma's

100K
September 24, 2016 The race has already taken place.
USA / East North Central / Ohio / Great Seal State Park, Chillicothe
Ultramarathon - 100 kilometers

Canyons 50K Trail Run

100K
April 29, 2017 The race has already taken place.
USA / Pacific / California / Foresthill
Ultramarathon - 100 kilometers
Trail Western States Qualifier Mountain