Upcoming 100 Milers

Endurance Grid lists twenty-seven 100 milers across the US, from November 2026 to October 2027 across 18 states.

27
Races
18
States

What a 100 Mile is

A 100-mile race is a running race where athletes run 100 miles long (160.9 kilometers) for time.

100 milers are busiest in November and December, with the most in North Carolina, Missouri, Arkansas, and California.

Frequently Asked Questions

How many 100 Mile ultramarathons are there in the US?
Endurance Grid's Race Calendar lists 27 upcoming 100 Mile ultramarathons across 18 states.
How far is a 100 Mile ultramarathon?
A 100-mile race is a running race where athletes run 100 miles long (160.9 kilometers) for time.
Which states have the most 100 Mile ultramarathons?
The states with the most 100 Mile ultramarathons on Endurance Grid's Race Calendar are North Carolina, Missouri, Arkansas, California, Connecticut, and Kentucky.