Upcoming 50Ks

Endurance Grid lists sixty-eight 50Ks across the US, from August 2026 to July 2027 across 25 states.

68
Races
25
States

The distance

What a 50K is

A 50K is a running race where athletes run 31.1 miles long (50 kilometers) for time.

50Ks are busiest in October and September, with the most in Colorado, South Carolina, Texas, and Pennsylvania.

Frequently Asked Questions (FAQs)

How many 50K ultramarathons are there in the US?+
Endurance Grid's Race Calendar lists 68 upcoming 50K ultramarathons across 25 states.
How far is a 50K ultramarathon?+
A 50K is a running race where athletes run 31.1 miles long (50 kilometers) for time.
Which states have the most 50K ultramarathons?+
The states with the most 50K ultramarathons on Endurance Grid's Race Calendar are Colorado, South Carolina, Texas, Pennsylvania, California, and Kentucky.