Marathons in California

Name: O’Neill Park Trail Races
Start: 2025-05-17
End: 2025-05-17

Browse Marathon races in California, including upcoming races and races up to one year past their event date. Sort by highest rating or number of reviews to elevate the most popular races.

For each Marathon race, you’ll find key details, finisher ratings and reviews, photos, videos, related articles, race-day weather data and a link to register.

Loading results Resetting search …

Marathons in California

Showing Marathons in California

Browse by Race Distance

Browse By City