California
California Trail Running Calendar 2026-2027
Explore the best trail runs in California for 2026-2027! Our updated list features 387 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
Trail races in Malibu offering 30K, 50K and 50 Mile courses on coastal singletrack and fire road with significant climbing and ocean views.
High Desert Ultra in Ridgecrest, California on December 5, 2026 features 50K, 30K and a new 10K through the Goldbug mining area set in high desert scenery.
Trail races of 30K, half marathon and 10K at China Camp State Park near San Rafael, with chip timing, cupless aid stations, and bay and Mt. Tam views.
A volunteer organized fun run and walk on Del Mar beach offering 3K and 5K routes while supporting veterans and regional land conservation.
An in-person half marathon on Runyon Canyon trails in Los Angeles on Saturday, December 5, 2026, with tickets listed at 0.00 USD.
An urban 50K and 50 mile fat ass run from Twin Peaks in San Francisco, with volunteer aid stations and a four hour forty five minute cutoff at mile 25.
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.
Holiday themed event at West Creek Park offering 5k 10k 15k and a half marathon on December 6 2026 with marked looped courses and aid stations each loop.
Youth focused event in Oakland with a 1 mile kids fun run and a 5K trail run at Joaquin Miller Park, with limited parking and packet pickup before the race.
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 Last Person Standing race in Yucaipa, CA on December 11, 2026 where runners complete hourly 4.167 mile loops until one competitor remains.
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 through Sanborn County Park redwoods on December 12, 2026 offering 5K, 10K and half marathon options with chip timing and finisher medals.
Trail races at Daley Ranch in Escondido with 10 mile, 10K and 5K dirt courses, notable climb to Stanley Peak and a 300-runner field limit.
Trail race at Magnolia Ranch, Pilot Hill CA on December 12, 2026 offering 5K to 50K on dirt single track with rolling hills, three aid stations, and pink ribbon course markings.
Scenic loop race around Angel Island with a Half Marathon (two loops) and a single loop 10K, limited to 400 participants and includes ferry fare.
Trail event in Cool, CA on December 12, 2026 offering 50K and half marathon courses with aid stations, live tracking, maps, and finisher medals.
Timed 6 hour and 12 hour loop trail run near Mt. Woodson in Ramona with a roughly 1.5 mile singletrack lap, significant climbing, and one aid station per lap.
A multi-distance trail event at Griffith Park on December 19, 2026 offering 5k, 10k, 15k and a half marathon with aid station, medals, photos and group discounts.
Trail running in Woodside, CA with 10K, half, 35K and 50K courses through redwoods and varied single track terrain.