Ultramarathons in California
California has 5 upcoming ultramarathons scheduled for 2026: JP's Backyard Ultra/Hike, The Final Edition in Napa on September 26, Ridge Creek Run Club 12 Hour Ultra in Dinuba on October 10, Island View Endurance Run in Goleta on October 24, Dalton Canyon Ultra in Glendora on February 6, and Badwater Presents 40/40 NOW: Creating Balance in an Ultra World in Death Valley on May 13.
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Ultra
Badwater Presents 40/40 NOW: Creating Balance in an Ultra World
May 13, 2027
Death Valley, CA
Frequently asked questions
What is an ultramarathon?▾
An ultramarathon is any race longer than the standard marathon distance of 26.2 miles. Common ultra distances are 50K (31 miles), 50 miles, 100K (62 miles), and 100 miles. Most ultras take place on trails.
What are the most famous ultramarathons in the US?▾
Western States 100 is the most prestigious, followed by Leadville Trail 100, Hardrock 100, and UTMB Canyons. The JFK 50 Mile is the oldest US ultra, running since 1963. Find all of these on RACE.
How do I train for my first ultra?▾
Most runners build up to their first 50K after completing a marathon. Training typically spans 16-24 weeks with weekly mileage of 40-60 miles, including back-to-back long runs on weekends to simulate race-day fatigue.
Do I need trail experience for an ultramarathon?▾
While many ultras are on trails, some are on roads or mixed terrain. For trail ultras, practice running on uneven surfaces and hills. A 50K on a relatively flat trail is a great first ultra for road runners making the transition.