Trail Running Calendar California 2026-2027

Trail marathon, half marathon and 5 mile at Andrew Molera State Park in Big Sur with Old Coast Road climbs, marked aid stations, and a 300 runner limit.

A community ultramarathon and hike at Skyline Wilderness Park in Napa, CA, featuring a 3.3-mile loop repeated up to ten times in an hourly format to raise funds for the Pheo Para Alliance.

Double Peak Challenge in San Marcos on September 26, 2026 offers 10K, 5K and a free Kids Trot plus a race expo and awards.

The Great Trail Race is a point to point event between Truckee and Tahoe City, California, on Saturday, September 26, 2026. Participants may choose gravel bike, mountain bike, or trail run and select either an Elite or Classic course.

A trail event at Vandenberg Space Force Base on September 26, 2026 offering 10 km and 20 km distances. Non-base participants must show a REAL ID for base entry and all finishers receive a medal and a drink ticket.

Trail running in shaded redwood forest at Sanborn County Park on September 27 2026, with 10K, half marathon and 50K options; steep singletrack, shuttle parking, chip timing and specific mandatory gear for the 50K.

A themed run in Long Beach on September 27 with Half Marathon, 10K, 5K, a family mile and kids dash, ocean views, chip timing and a pizza themed finish line festival.

Trail race in Auburn on September 27, 2026 featuring a half marathon plus 12K and 5K with much of the half on the Western States Trail.

Yuba Gold is a self guided *50K* point to point in Nevada City, CA held October 1 to 31, 2026. Runners complete the original South Yuba Campground to Bear Valley course, submit an activity link for ranking, and receive a finisher award.

Back On The Ranch Trail Run in Los Olivos CA runs October 2 to 4, 2026 and offers timed trail formats from three hours to 48 hours. The event is organized by AllWeDoIsRun, a promoter of California Central Coast trail events.

A permitted loop footrace around a 760,000 year old caldera in Mammoth Lakes featuring alpine lakes, Mono Lake tufa towers, mountain summits and prize money for top finishers.

Experience a weekend of multisport racing at McNear’s Beach Park featuring an Olympic triathlon, a trail half marathon, and a combined challenge for participants seeking dual events in San Rafael.

Trail runs near Bear Valley and Lake Spaulding with a 50K and a 24 mile option. The 50K includes a summit loop with about 5,700 ft of gain, rocky sections on Signal Peak OHV Road, cupless aid stations, and finisher medals.

A 100 mile endurance run through the San Gabriel backcountry, held since 1986; the 2026 edition uses an out and back course from Loma Alta Park.

Cuyamaca 100k is a 100 kilometer trail race in San Diego on Oct 3, 2026, crossing oak woodlands, meadows, pine forest and chaparral. The 2026 event is a Western States 2027 qualifier and supports outdoor education and public lands causes.

9.1 miles to the Mt San Antonio summit with 3,926 ft vertical gain on steep, exposed mountain trails; course capped at 500 entrants in Angeles National Forest.

Experience a trail half marathon on San Bruno Mountain featuring 2,400 feet of elevation gain and stunning views. Enjoy a scenic route with 93 percent trail coverage followed by a post race meal and finishers medal.

Run by the Sea at Wilder Ranch State Park on October 4, 2026 offers a Half Marathon, 12K and 4K run/walk along mostly flat packed dirt trails with coastal bluff and Monterey Bay views. Organized by the Santa Cruz Track Club; proceeds benefi..

Kokanee Trail Runs on October 4, 2026 in South Lake Tahoe features a 1/2 Marathon, 10K, 5K and a half mile Tadpole Trot with scenic lake and mountain courses, aid stations, sustainable event shirts, and local charity support.

A 5K on shaded eucalyptus horse trails at Ernie Howlett Park in Palos Verdes Peninsula on October 4, 2026. In person and virtual options are available, plus a fundraising route that waives the fee with at least $100 raised for Strides in Re..