California
California Trail Running Calendar 2026-2027
Explore the best trail runs in California for 2026-2027! Our updated list features 370 exciting trail runs across the region. Find your next trail run in California below and join the trail community at these great events!
December 2026
A memorial 5K on Baker Beach honoring a longtime DSE member, featuring a mixed surface course with a wooden bridge and parking at the upper lot.
A community fundraiser at Joaquin Miller Park featuring a 5K trail run and a 1 mile kids fun run on 12/06/2026.
Trail run and hike at Elfin Forest Reserve with chip timed 5K and 10K, a post race festival, and a limited field of participants.
A Krampus themed Last Person Standing race in Yucaipa, CA where runners repeat a 4.167 mile loop each hour until only one remains.
A 4.5 mile out and back fun run and walk in Granite Bay that includes a Santa suit, raffles, and support for local community partners.
Trail races at Crystal Cove State Park on December 12, 2026 include 15k, 6k and a 1k kids run with a $2,000 prize for the 15k.
Trail races at Sanborn Regional Park on December 12, 2026: 5K, 10K and half marathon through redwoods with chip timing and finisher medals.
Trail races at Daley Ranch near Escondido offering 10 mile, 10K and 5K on 100% dirt single track and service roads with hill climbing and scenic views from Stanley Peak.
Scenic island race at Angel Island with a half marathon and a 10K, limited field, ferry access required, and medals for all half finishers.
Trail event in Cool CA offering 50K and Half Marathon with live tracking, course maps, timed cutoffs, and finisher medals.
Timed 6 and 12 hour trail events on a 2.5K loop near Mt. Woodson in Ramona with one aid station per lap and a field limit of 50 SURF members.
Night trail races of 5K and 10K at Marvin Braude Mulholland Gateway Park in Tarzana, CA, with marked fire road courses and required headlamps.
A charity 5K run and 2.5K walk at Griffith Park supporting local agencies that serve people experiencing homelessness and food insecurity.
Holiday-themed run at Griffith Park offering 5K, 10K, 15K and a half marathon on a shared hard-packed dirt horse trail with medals and aid station.
Trail races in Woodside, CA on December 19, 2026 offering 10K, Half, 35K and 50K on redwood single-track with aid stations and chip timing.
December 19, 2026 trail races at Magnolia Ranch Trail Head near Pilot Hill CA offering distances from 5K to 50K on dirt single track with rolling hills and scenic views.
Trail running at Sycamore Canyon with marathon, half marathon, 10K and hill climb options, notable elevation gains, required self-sufficiency, and costume prizes.
Trail races at Lake Chabot in Castro Valley on New Year's Eve and New Year's Day with 5K, 13K, half marathon, 10K and a remote option.
January 2027
Trail focused 5K, 10K, half marathon and virtual option at Lake Chabot on January 1, 2027 with varied surfaces and rolling hills.
New Year 5K and 10K run and walk starting at Chicago Park School in Grass Valley, with proceeds supporting local community organizations.