100 mile ultra marathons

100 mile ultra marathons

Ultra runs that clock in at over 150K are some of the biggest endurance challenges on Earth!

24 100 mile ultra runs

The longest of the ultra distances, 100 mile ultra marathons are a big challenge for any runner. But distance isn't always the key challenge with long ultra runs - the total ascent gives a much better indication of how hard it will be. Select your location to find 100 mile ultra runs in your area or scroll down to browse events coming up.

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100 mile ultra runs near you

Select your location for 100 mile ultra marathons in your area.