Upcoming Ultramarathons in California

Endurance Grid lists 8 ultramarathons in California, from January to October 2027 across 8 cities.

8
Races
8
Cities

Ultramarathon Races in California

The ultramarathon race calendar in California is busiest in April, January, and February, with races most often in Corona, Escondido, and San Diego.

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.

Frequently Asked Questions

How many ultramarathons are in California?
Endurance Grid's Race Calendar lists 8 upcoming ultramarathons in California across 8 cities, from January to October 2027.
What ultramarathon distances are offered in California?
Ultramarathons in California include 1 Mile, 10 Mile, 100 Mile, 10K, 15K, 50 Mile, 50K, 5K, and more distances.
When is ultramarathon season in California?
Ultramarathon season in California runs spring through fall. Of the upcoming ultramarathons on Endurance Grid's Race Calendar, the most are in April and January.
Which California cities have ultramarathons?
Ultramarathons in California are held in Avalon, Buellton, Corona, Escondido, Glendora, Lake Forest, Reedley, and San Diego.

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