Trail Running Calendar California 2025-2026

Tackle Sycamore Canyon's rugged singletrack at the Dirty December Trail Run on Dec 21, 2025, with marathon, half, 10K and a repeating hill climb loop. Expect big climbs, festive costumes, a tech shirt and finisher awards.

Ring out the year with Almost New Year's Eve at scenic Lake Chabot in Castro Valley on 12/27/25. Trail routes for runners, walkers and hikers include 5K, 10K and half marathon distances with free post race photos.

Start the year on scenic Lake Chabot trails with Brazen New Year's Day, offering half marathon, 10K, 5K and virtual options with timed results and free photos. Celebrate challenging trail miles and earn a commemorative medal.

Kick off the New Year on the trails at Auburn Resolution Run in Overlook Park on January 1, 2026. Choose 5k, 10k, 10 mile or run virtually and bring home a 2026 finisher medal.

Ring in 2026 with the Happy New Year Run at West Creek Park in Valencia, CA. Choose from 5k, 10k, 15k or half marathon on scenic looped trails, enjoy finisher medals, free photos and a festive start to your year.

Enjoy Bay Area views and varied singletrack at Hacienda Hills Trail Run Winter near San Jose on Jan 3, 2026. Choose from nine distances up to 50K, enjoy marked courses, aid stations and a finisher medal.

Run the Lost Coast 55K in Whitethorn California on January 3 2026, a scenic backcountry route of gravel and quiet pavement with sweeping coastal views. Rough surfaces and about 6,500 feet of climbing make for a rewarding remote challenge.

Challenge yourself on scenic single track and dirt roads around Lake Hodges at the Race of the Gods, a January trail classic near Escondido. Options from short fun runs to epic ultramarathons make this a must for trail lovers.

Ring in the New Year with a scenic trail run at Whittier Narrows Recreation Area on January 4, 2026. Choose 5k, 10k, 15k or a half marathon and enjoy finisher medals, free photos, aid stations and a festive post race vibe.

Tackle rugged trails at the San Diego 50 & Trail Runs, with distances from a 50 mile challenge to youth and stroller friendly routes. Expect scenic San Pasqual Valley terrain, well stocked aid stations, finisher swag and wooden medals.

Enjoy scenic shore side trail runs at Granite Beach with two distances to choose from and stunning Folsom Lake views. Finish with a locally brewed IPA for 21 and over, a custom IPA Trail Run glass and a hearty post race meal.

Tackle scenic Western States trails at the No Hands Trail Run in Auburn, California on January 10, 2026, with four distances from an uphill 8K to a rugged 50K. Expect technical singletrack, No Hands Bridge views, and hearty aid stations.

Join Hope in Every Step 5K in Modesto, California on January 10, 2026 for a scenic run and walk along the Tuolumne River Parkway trails. Enjoy community vibes, teal race shirts, and friendly competition with awards for top finishers.

Run through towering redwoods and fern filled trails at Huddart Park with distances from 8K to 50K plus a free kids run. Well stocked aid stations and scenic single track make this a perfect challenge for trail lovers.

Run through redwood lined trails at Huddart Park in the Crystal Springs Trail Run, with distances from 8K to 50K plus a free kids sprint. Enjoy scenic single track, frequent aid stations and a commemorative finisher medal.

Run scenic dirt trails and ranch roads at La Cuesta Ranch near San Luis Obispo, with start and finish at a historic barn. Choose 10K, 20K or 30K looped distances and enjoy stocked aid stations, a custom tee and finisher award.

Run scenic single track along Folsom Lake under oak trees with gently rolling hills and a creek crossing. Distances from 1 mile to 50K, race day registration on site, and every finisher earns a commemorative medal.

Run a scenic trail 10K or 5K along the shores of Folsom Lake at Granite Beach on January 24, 2026. Well marked and supported, the course features aid stations and beautiful lake views to motivate runners of every level.

Run the scenic, technical trails of Montara Mountain at the Pacifica Foothills Trail Run in San Pedro Valley Park, with 30K, half marathon and 10K options for all abilities. Full aid stations and sweeping coastal views make this a must for..

Join the 22nd annual Calico Trail Run on Sunday January 25 2026, choose 30K or 50K through the historic Calico Ghost Town and Mojave Desert mountains near Yermo California. USATF sanctioned trails promise epic scenery and a true desert chal..