Trail Running Calendar California 2025-2026

Take the plunge or lace up for a 5K trail or 1 Mile fun run at the Greater Sacramento Polar Plunge & Runs to support Special Olympics Northern California. Join the fun, earn a commemorative medal, and cheer on athletes.

Run scenic trails and rolling hills at the Tesoro Viejo Spring Classic, with half marathon, 10k, 5k and virtual options. Enjoy live music, local food, a medallion and festival fun while supporting local land and wildlife conservation.

Tackle scenic trails at China Camp State Park in March 2026 with in person or virtual 5K, 10K, and a challenging half marathon. All entrants receive a beer sampler stein, event shirt, and handcrafted woodallion.

Run desert trails in Anza Borrego from Stagecoach Trails RV Resort on March 14, 2026 with 50K, marathon, and half marathon options. Aid stations, volunteers, and on site camping make this scenic course an ideal spring trail getaway.

Experience rugged mountain trails and sweeping views at Tierra Redonda Mountain Trail Run and Camp in Bradley California on November 15 2025. Choose from epic 48 hour and 24 hour challenges or 20 km 10 km and 5 km distances.

Take on a scenic 50K along the Western States Trail near Foresthill, California on March 14, 2026. This out and back course mixes rugged singletrack with friendly aid stations and a 9 hour 30 minute cutoff for a big day on trail.

Catalina Island Marathon, 10K and 5K on March 14, 2026 offers scenic island trail running through the Catalina Island Conservancy with ocean views and rolling hills. Marathon, shorter distances and a kids run welcome a range of abilities.

Challenge yourself on classic Marin trails with towering redwoods, coastal ridges and sweeping bay views starting at Rodeo Beach. Choose a 50 mile or 50K route over technical single track and fire roads for a true Bay Area ultrarunning expe..

Run scenic singletrack through Las Virgenes Canyon in Calabasas with 22k and 10k options featuring hills, switchbacks and creek crossings. This March event is Race 2 of the SoCalTrail Trail 1/2 Series and includes shirts, finisher medals an..

Experience rugged mountain trails and sweeping views at Tierra Redonda Mountain Trail Run and Camp in Bradley California on November 15 2025. Choose from epic 48 hour and 24 hour challenges or 20 km 10 km and 5 km distances.

Pirate's Cove at Lake Cuyamaca on March 20, 2026 is a scenic timed endurance run and hike with 24 hour, 12 hour and 6 hour options. Camp at Chamber's Park Campground for race HQ and remember to bring a reusable cup for this cupless event.

Three days of scenic trail running in Marin County with routes summiting Loma Alta and Big Rock Ridge and sweeping Bay Area views. Choose from 28K, 50K or a point to point 100K for a well supported race weekend.

Rattlesnake Dick offers scenic, challenging trail routes in Cool, CA with 50K, 25K and 10K options starting and finishing at the Cool Staging Area. Professional timing and live tracking keep you connected, and finishers under 10 hours earn..

Run scenic single track trails and ridgelines above Valencia, Santa Clarita on March 21, 2026 with 10K, half marathon, 50K and virtual options. Expect big climbs, aid stations, a finisher medal and sustainable cupless support.

Scenic single track trails, hills and streams in Bothe Napa Valley State Park near Saint Helena host marathon, half and 10K races on March 21, 2026. Limited to 300 runners, the event offers T shirts and medals for the marathon and half.

Run through towering redwoods in Oakland's Redwood Regional Park with distances from a kids 50 yard dash to a challenging 50K. Enjoy ribbon marked singletrack, stocked aid stations, custom finisher medals, and awards for top finishers.

Run the Lag Bon 10K on March 22 in Fairfax on a scenic, technical Lagunitas trail with roots, rocks and muddy sections. This small charity race supports World Water Day with proceeds to safe water programs and runners get a shirt and medal.

Run Coast to Crest on March 28, 2026 in Del Mar, a scenic 5K and 10K on hard packed lagoon trails with open views. Mostly flat out and back courses end with a downhill finish and serve as the final Sunshine Series qualifier.

Run the Western Pacific at Quarry Lakes, Fremont on March 28, 2026. Choose a half marathon, 10K or 5K on mostly flat, scenic Alameda Creek and Western Pacific Trail, with virtual entries and free race photos.

Tackle the historic Western States trail at American River Overlook Park near Auburn and Cool, CA with 5K, 10K, Half Marathon or 35K options. Expect technical single track, big climbs, generous aid and custom finisher medals.