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Ultra Marathons found in California in Spring

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Ultra Marathons in California in Spring 2026

Find A Race is the US's favourite event listings site. Check out our list of Spring 2026 Ultra Marathons in California below.

Race Calendar: Ultra Marathons found in Spring

πŸš€Boosted

Orange County Multi-Sport Festival

Mission Viejo, California
Sun 26 Apr 26
$50.60 - $272.00
πŸš€Boosted

Lake Sonoma 100K, 50K, TS Half Marathon

Geyserville, California
Sat 11 Apr 26
$117.60 - $295.00
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L.A. CHINATOWN FIRECRACKER 5K/10K/KIDDIE/PAW'ER DOG RUN/WALK & BIKE RIDE

Los Angeles, California
Sat 28 Feb 26 - Sun 01 Mar 26
$13.00 - $81.00

Redwood (Spring) Trail Run

Oakland, California
Sat 21 Mar 26
Free - $85.80

VALENCIA Trail Race

Valencia, California
Sat 21 Mar 26
$91.10 - $154.70

Silver Moon Race: Kings River

Reedley, California
Sat 04 Apr 26 - Sun 05 Apr 26
$85.80 - $234.20

Bedrock Valley Trail Runs

Hemet, California
Sat 11 Apr 26 - Sun 12 Apr 26
$16.90 - $122.90

Lake Sonoma 100K, 50K, TS Half Marathon

Geyserville, California
Sat 11 Apr 26
$117.60 - $295.00

SPASM Lake Chabot Trail Run

Castro Valley, California
Sat 11 Apr 26
Free - $85.80

Badwater Salton Sea, presented by Mount to Coast

Borrego Springs, California
Sat 18 Apr 26 - Sun 19 Apr 26
$394.75

Mountains 2 Beach Marathon and Half

Ventura, California
Sat 18 Apr 26 - Sun 19 Apr 26
$22.19 - $212.99

Horseshoe Lake Trail Run

La Honda, California
Sat 18 Apr 26
Free - $85.80

Orange County Multi-Sport Festival

Mission Viejo, California
Sun 26 Apr 26
$50.60 - $272.00

Finish The Ride and Finish The Run Griffith Park

Los Angeles, California
Sat 02 May 26 - Sun 03 May 26
$11.60 - $85.80

2026 Cal Tri Ventura - 5.3.26

Ventura, California
Sun 03 May 26
$31.59 - $526.00

Grizzly Peak Trail Run

Berkeley, California
Sat 09 May 26
Free - $85.80

Cinderella Trail Run

Oakland, California
Sat 30 May 26
Free - $85.80
5.0

MS Run the US Ultra Relay

Santa Monica, California
Mon 23 Mar 26
Free

Ride 4A Reason 2026

Oakland, California
Sat 25 Apr 26
$50.00 - $100.00

Miwok 100K

Stinson Beach, California
Sat 02 May 26
$310.00 - $460.00
Showing 1-18 of 18 results