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

Croom Trail

Croom Trail 50M Fools Run
April 04, 2015 The race has already taken place.
USA / South Atlantic / Florida / Brooksville
Ultramarathon - 50 miles
Trail

Croom Trail

Croom Trail 50K Fools Run
April 04, 2015 The race has already taken place.
USA / South Atlantic / Florida / Brooksville
Ultramarathon - 50 kilometers
Trail

Bloomington to West Lafayette (Indiana)

3 Person Team
April 11, 2015 The race has already taken place.
USA / East North Central / Indiana / Bloomington
Ultramarathon - 100 miles
Road Running Relay

Bloomington to West Lafayette (Indiana)

5 Person Team
April 11, 2015 The race has already taken place.
USA / East North Central / Indiana / Bloomington
Ultramarathon - 100 miles
Road Running Relay

Bloomington to West Lafayette (Indiana)

8 Person Team
April 11, 2015 The race has already taken place.
USA / East North Central / Indiana / Bloomington
Ultramarathon - 100 miles
Road Running Relay

Bloomington to West Lafayette (Indiana)

6 Person Team
April 11, 2015 The race has already taken place.
USA / East North Central / Indiana / Bloomington
Ultramarathon - 100 miles
Road Running Relay

Bloomington to West Lafayette (Indiana)

4 Person Team
April 11, 2015 The race has already taken place.
USA / East North Central / Indiana / Bloomington
Ultramarathon - 100 miles
Road Running Relay

Bloomington to West Lafayette (Indiana)

7 Person Team
April 11, 2015 The race has already taken place.
USA / East North Central / Indiana / Bloomington
Ultramarathon - 100 miles
Road Running Relay

Bloomington to West Lafayette (Indiana)

2 Person Team
April 11, 2015 The race has already taken place.
USA / East North Central / Indiana / Bloomington
Ultramarathon - 100 miles
Road Running Relay

Earth Day 50K / 15 Mile Trail Race

Earth Day 50K Trail Race
April 18, 2015 The race has already taken place.
USA / East North Central / Illinois / Crystal Lake
Ultramarathon - 50 kilometers
Trail Relay

Cheyenne Mtn. Trail Race

Cheyenne Mtn. Trail 50K Race
April 25, 2015 The race has already taken place.
USA / Mountain Region / Colorado / Cheyenne Mountain State Park
Ultramarathon - 50 kilometers
Trail Epic Endurance Events Fast

The Aoudad Trail Run

The Aoudad 50K
April 25, 2015 The race has already taken place.
USA / West South Central / Texas / Leakey
Ultramarathon - 50 kilometers
Hilly Trail

101 Peregrinos

May 02, 2015 The race has already taken place.
Spain / Castile and León / Ponferrada
Ultramarathon - 101 kilometers

Badwater Salton Sea

May 03, 2015 The race has already taken place.
USA / Pacific / California / Salton City
Ultramarathon - 81 miles
Desert Team Trail Mountain

Cimarron 50k Endurance Run

May 03, 2015 The race has already taken place.
USA / Mountain Region / Colorado / Cimarron
Ultramarathon - 50 kilometers
Road Running Ever Run Racing