California · Ultra

Ultra Races in California

Every upcoming Ultra in California, all 24 of them, sorted by date. Dates, entry fees, finish-time stats from past results, and start-line maps.

24 upcoming Ultra races · 18 with finish-time stats

5K 60310K 380Half Marathon 276Marathon 25
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By the numbers

The Biggest and Longest-Running

The California races that stand out on the numbers: the biggest field, and the longest unbroken run of editions.

Largest field226 finishersBadwater 267 VRin the Ultra

Ultra Races by City

Oakland 2Woodside 2Castro Valley 2Sausilto 1Clayton 1Auburn 1San Francisco 1Hill Valley 1Irvine 1Friant 1San Jose 1Death Valley 1Avalon 1Escondido 1Sausalito 1Los Angeles 1Pacifica 1Ventura 1Reedley 1Los Gatos 1Fish Camp 1

Soonest Ultra Races in California

24 total
Sat, Aug 1, 2026Rodeo Valley Trail Run Sausilto, CA31 Miles18.6 MilesHalf Marathon4.8 MilesPricing TBADetails Sat, Aug 15, 2026Redwood (Summer) Trail Run Oakland, CA5 MilesHalf Marathon30KMarathonFrom $60Details Sat, Aug 29, 2026SPASM Crystal Springs Trail Run Woodside, CA10KHalf Marathon22 MilesMarathonFrom $60Details Sun, Sep 6, 2026Diablo Trail Run Clayton, CA4 Miles10 MilesHalf MarathonMarathonFrom $50Details Fri, Sep 18, 2026Mile Madness Endurance Run Auburn, CA10 Miles50K50 Miles100 MilesFrom $75Details Sat, Oct 10, 2026Ruth Anderson Memorial Endurance Run San Francisco, CA50K50 Miles4.5 MilesFreeDetails Wed, Oct 21, 2026Hill Valley 88 Miler ™ Hill Valley, CA88 Miles1 Mile0.5 Miles0.25 MilesFrom $88Details Sat, Nov 7, 2026Lake Chabot Trail Run Castro Valley, CA4.8 MilesHalf Marathon30KMarathonFrom $25Details Sat, Nov 7, 20262026 Kaiser Permanente Get Fit Festival Irvine, CA36 Miles5KFrom $35Details Sat, Dec 5, 2026San Joaquin River Trail 10k/25k/50k Friant, CA50K25KFrom $50Details Thu, Dec 31, 2026New Year's One Day San Jose, CA100 Miles50 Miles30 Miles3 MilesFrom $90Details Fri, Jan 1, 2027Badwater 267 VR Death Valley, CA267 MilesFrom $93Details

How we calculate these stats: RunSesh calculates these figures from the most recent published results of past editions, sourced from RunSignup. We show aggregates only: field size, winning and median times, and the cutoff. We never publish individual finisher tables. Last updated Jul 27, 2026.

Common Questions About Running an Ultra in California

Which California cities have the most Ultra races?

Oakland (2), Woodside (2), Castro Valley (2), Sausilto (1) lead the state for Ultra races. Those give you the most dates to choose from if your schedule is tight.

When are most Ultra races held in California?

January is the busiest month for Ultra races in California, with 4 of the 24, followed by April with 4. If you are flexible on the date, that is the quickest way to narrow things down.

How much do California Ultra races cost?

Entry fees for Ultra races here run from free to about $165, depending on the event and how early you register.

How early should I register for an Ultra in California?

16 of the 24 Ultra races in California already have a price increase scheduled, so entry gets more expensive the longer you leave it. Race pricing almost always steps up as the date approaches, and signing up early is usually the cheapest option.

Are there trail Ultra races in California?

Yes, 15 races around California get you off the pavement: 14 are trail races, and 1 mixes road and trail. Surfaces are not always published, so it is worth checking a specific race before you register.