Upcoming 100 Milers

Endurance Grid lists twenty-eight 100 milers across the US, from October 2026 to August 2027 across 19 states.

28
Races
19
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 October and November, with the most in North Carolina, Indiana, Michigan, and Missouri.

Frequently Asked Questions

How many 100 Mile ultramarathons are there in the US?
Endurance Grid's Race Calendar lists 28 upcoming 100 Mile ultramarathons across 19 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, Indiana, Michigan, Missouri, Arkansas, and Kentucky.