Upcoming Trail Running 100 Milers

Endurance Grid lists twenty-two trail running 100 milers across the US, from September 2026 to September 2027 across 13 states.

22
Races
13
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.

Trail running 100 milers are busiest in October and December, with the most in Texas, New Jersey, North Carolina, and Pennsylvania.

Frequently Asked Questions

How many 100 Mile trail running races are there in the US?
Endurance Grid's Race Calendar lists 22 upcoming 100 Mile trail running races across 13 states.
How far is a 100 Mile trail running?
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 trail running races?
The states with the most 100 Mile trail running races on Endurance Grid's Race Calendar are Texas, New Jersey, North Carolina, Pennsylvania, South Carolina, and Ohio.