Trail Running Calendar California 2025-2026

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.

Celebrate New Year’s Day with scenic loop races at Lake Chabot, from half marathon to 10K, 5K and remote options on rolling trail terrain. Enjoy free race photos and earn a New Year Mega Medal if you also ran Brazen New Year’s Eve.

Kick off the new year on the trails at Overlook Park in Auburn, CA with the Auburn Resolution Run. Choose 5K, 10K, 10 mile or virtual and earn a 2026 finisher medal for completing the course.

Ring in 2026 with a scenic trail run at West Creek Park in Valencia. Choose from 5k to half marathon on marked out and back loops with aid stations and festive finisher medals.

Run scenic trails through Hacienda Hills at Almaden Quicksilver Park with distances for every level, from kids runs to ultramarathons. Take in Bay Area views, use on course aid and day of race registration, and earn a commemorative finisher..

Tackle the Lost Coast 55K in Whitethorn, California on January 3, 2026. This scenic but demanding 55K packs roughly 6,500 feet of climbing across backcountry gravel roads and quiet pavement, offering sweeping coastal views and a remote trai..

Tackle the Del Dios Trail Race "The Race of the Gods" at Lake Hodges in Escondido on Jan 4, 2026. Choose from 5K to 50K on scenic dirt roads and single track with up to 1000 feet of climbing in this championship qualifier.

Start 2026 strong with Ring in the New Year at Whittier Narrows Recreation Area. Choose from 5k to half marathon on scenic park trails and earn a custom finisher medal, goodie bag and free event photos.

Run scenic San Pasqual trails on Jan 10, 2026 with distances from a youth 1 mile to a 50 mile ultra. Finishers get a tri blend shirt, handcrafted wooden medal, free race photos and awards for top finishers.

Run scenic shoreline single track at Granite Beach with 12K and 5K options, then toast your effort with a custom IPA glass and locally brewed beer for participants 21 and over. Enjoy post race food and age group awards in a lively community..

Take on rugged singletrack and big climbs at the No Hands Trail Run in Auburn CA on Jan 10, 2026, with distances from 8K to 50K to suit every trail runner. Enjoy friendly aid stations, cupless racing and a custom pint glass for 50K finisher..

Join Hope in Every Step 5K in Modesto for a family friendly run or walk along the scenic Tuolumne River Parkway. Gear up with a teal event shirt, compete for awards, and help support local youth through Sole Support.

Run the scenic El Dorado Trail from Placerville to Folsom in the Double Double Double 50K, a mostly runnable, gently downhill ultramarathon on Jan 10, 2026. Low key support and post run Double Double treats make this a relaxed, fun challeng..

Run or walk at Sycamore Island on Sunday, January 11, 2026 with 5k and 10k options over scenic single track and dirt roads. Support local river conservation while earning a custom finisher medal and event shirt.

Run through redwood forests at Huddart Park with distances from a short 8K to a challenging 50K, plus a free kids dash. Expect scenic single track routes, friendly aid stations and a welcoming trail community.

Run through redwood and fern groves at Huddart Park at the Crystal Springs Trail Run on Sunday, January 18, 2026, with distances from a fun 8K and kids dash to challenging marathon and 50K ultras. Aid stations, custom medals and race suppor..

Run scenic trails near San Luis Obispo at La Cuesta Ranch with timed 10K, 20K and 30K loop options from the historic barn. Stocked aid stations, a custom shirt and finisher award add polish to this rugged Poly Canyon course.

Run the Sweetwater Trail at Folsom Lake on Jan 24 with distances from kids run to 50K on mostly single track through oak woods and rolling hills. All finishers get a commemorative medal and aid stations support longer routes.

Hit the scenic shoreline trails of Folsom Lake on January 24, 2026 with the Gumby 5K and 10K at Granite Beach. Enjoy well marked single track, finisher medals and Gumby themed shirts available for preorder.

Explore twisty single track and coastal views along Montara Mountain at the Pacifica Foothills Trail Run in San Pedro Valley Park on January 24, 2026. Pick a 10K, half marathon, or rugged 30K and soak up lively aid stations and friendly tra..