Upcoming Ultramarathons

Endurance Grid lists 168 ultramarathons across the US, from September 2026 to November 2027 across 34 states.

Find Ultramarathon races near you

168
Races
34
States

What an ultramarathon is

An ultramarathon is any running race longer than 26.2 miles. The most common distances are the 50K, 50-mile, 100K, and 100-mile — alongside timed events, where you cover as much ground as you can in a fixed window like 6, 12, or 24 hours.

Many ultras run on trails, with aid stations stocked with food, water, and posted cutoff times. For most entrants the goal is to finish, not to race the clock, and hiking the climbs is a normal part of the day.

50K
31 miles

Best starting point. The shortest ultra — your marathon base carries over.

Browse 50Ks
50 Mile / 100K
80–100 km

The middle distances. A long day where fueling and pacing decide everything.

100 Mile
161 km

The classic ultra milestone — often run overnight, with crew and pacers.

Browse 100 Milers

Explore Ultramarathon

By distance

50K50 Mile100K100 MileUltra

By state

ArkansasCaliforniaColoradoConnecticutFloridaIndianaKentuckyMarylandMichiganMinnesotaMissouriNew JerseyNew YorkNorth CarolinaOhioPennsylvaniaSouth CarolinaTexasUtahVirginiaWisconsin

By month

September 2026October 2026November 2026December 2026January 2027February 2027March 2027April 2027May 2027June 2027July 2027August 2027

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Frequently Asked Questions

How many ultramarathons are there in the US?
Endurance Grid's Race Calendar lists 168 upcoming ultramarathons across 34 states.
Which states have the most ultramarathons?
The states with the most ultramarathons on Endurance Grid's Race Calendar are Colorado, South Carolina, Florida, Connecticut, California, and North Carolina.
What are the ultramarathon distances?
Ultramarathon races are held at 1 Mile, 10 Mile, 100 Mile, 100K, 10K, 15K, 1K, 4 Mile, and more distances.
What is an ultramarathon?
An ultramarathon (ultra) is any foot race longer than the 26.2-mile marathon distance, such as a 50K, 50-mile, 100K, or 100-mile race. To learn more about what an ultramarathon is, check out Endurance Grid's sports guide.
What are aid stations, cutoffs, and pacers?
Aid stations are checkpoints along the course stocked with water, food, and supplies. Cutoff times are deadlines to reach certain points or to finish. At longer distances, many races allow pacers (runners who accompany you) and crew (a support team who meet you at aid stations).