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.

3,387 races

Krali Marko Trails

September 22, 2017 Race day in 3 days
Macedonia / Prilep
Ultramarathon
Trail Mountain

Krali Marko Trails

September 22, 2017 Race day in 3 days
Macedonia / Prilep
Ultramarathon
Trail Mountain UTMB Qualifier

Oxfam Trailwalker Australia - Perth

September 22, 2017 Race day in 3 days
Australia / Western Australia / Kalamunda
Ultramarathon
Walk Charity Team Trail Oxfam Trailwalker

Oxfam Trailwalker Australia - Perth

September 22, 2017 Race day in 3 days
Australia / Western Australia / Kalamunda
Ultramarathon
Walk Charity Team Trail Oxfam Trailwalker

Ragnar Relay Adirondacks

September 22, 2017 Race day in 3 days
USA / Mid-Atlantic / New York / Saratoga Springs
Ultramarathon
Ragnar Relay Series Relay

Ragnar Relay Washington D.C.

September 22, 2017 Race day in 3 days
USA / South Atlantic / Maryland / Cumberland
Ultramarathon
Ragnar Relay Series Relay

Ragnar Trail Northwoods-WI

September 22, 2017 Race day in 3 days
USA / East North Central / Wisconsin / Wausau
Ultramarathon
Trail

Ragnar Trail Northwoods-WI, Presented by Salomon

September 22, 2017 Race day in 3 days
USA / East North Central / Wisconsin / Wausau
Ultramarathon
Trail

Reebok Ragnar Adirondacks

September 22, 2017 Race day in 3 days
USA / Mid-Atlantic / New York / Saratoga Springs
Ultramarathon

Reebok Ragnar Washington D.C

September 22, 2017 Race day in 3 days
USA / South Atlantic / Maryland / Cumberland
Ultramarathon

100 Capital Classic

September 23, 2017 Race day in 4 days
South Africa / Pietermaritzburg
Ultramarathon

Berkeley Trail Adventure

September 23, 2017 Race day in 4 days
USA / Pacific / California / Tilden Regional Park, Berkeley
Ultramarathon
Inside Trail Racing
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