Trail Running Calendar California 2026-2027

The Romancing the Island Half Marathon will take place in Belvedere Tiburon on Saturday 11 April 2026. You can run between 10 and 21 kilometers.

Springtime trail races at Lake Sonoma include a Western States qualifying 100K, a 50K with a bridge crossing, and a women only Trail Sisters half, all centered at the Lake Sonoma Visitor Center with aid stations and camping options.

Trail runs and gravel rides at Diamond Valley Lake Marina in Hemet CA on April 11–12, 2026, with multiple distances for adults and kids, a stroller-only 5k, cupless aid stations, and finisher shirts and medals for marked run events.

Oriflamme 50K in Julian, California on April 11, 2026 is an out and back trail race that descends into desert terrain then returns via a long climb, with fully stocked aid stations and a 150 runner limit.

Challenge yourself on scenic Lake Chabot trails April 11, 2026 in Castro Valley with distances from 8K to 50K plus a free kids dash. Looped, well marked courses offer big climbs, frequent aid stations and finisher medals for all.

A women focused 10K in Auburn on April 11, 2026 featuring scenic trail loops, finisher shirts, age group awards and a raffle with four winners earning a trip to a women only running camp in Spain.

A multi-distance trail event in Pilot Hill, California on April 11, 2026, organized by Troy’s California Trail Runs, with courses on stony dirt paths across hilly terrain and lake views, offering distances from 5K to 50K.

A four-distance trail event in Calistoga that follows single track and fire road into the Mount St. Helena area. Routes include technical sections, long aid stretches, drop bag service at Highway 29, and finisher medals and shirts.

Hit scenic trails at Ruth McKenzie Preserve in Clovis on April 12, 2026, with a challenging half that climbs Table Mountain plus 10k, 5k and kids races. Expect rugged single track, aid stations, finishers medals and a festive post race spre..

Yaya's Run in Ventura invites runners to a scenic beach path race at Surfers Point with 5k, 10k, 15k and half marathon options. Join this memorial event for a morning of ocean views, supportive aid stations and finisher medals.

Badwater Salton Sea is an epic 81 mile team ultra from the Salton Sea to Palomar Mountain, gaining over 9,000 feet across desert roads and single track. Teams of two or three run together through extreme heat and wildly variable conditions.

Run scenic singletrack by Folsom Lake at Outlands Endurance Race in Pilot Hill CA April 18 2026 with 25K, 50K and 50M out and back courses. Includes a hat, wood awards, a post race meal and Sierra Ultra Trifecta credit for 50K and 50M.

Trail races at The Lakes Community Center in Lake Hughes on April 18, 2026, offering distances from 30K to 100 miles; the 100K and 100M are Western States qualifiers and the 50M awards AC100 Sterling Silver tickets to top finishers.

Run a scenic 5K on trails and roads through Ramona Wine Country with mud, hills and a choice of one or two loops, then stick around for a fun Beer Mile and wine tasting. Live music, pizza and proceeds supporting veterans add to the festival..

Trail races in April 2026 at Del Valle Regional Park offering Half Marathon, 10K and 5K distances with electronic chip timing. Finisher medals and t shirts are provided and walkers and hikers are welcome.

Take on rugged single track and sandy climbs at the Annual NATRO@NOLI Indian School Trail Races in San Jacinto, CA. Marathon, Half, 5k and Kids 3k distances, limited spots, with proceeds supporting Noli Indian School.

A 50K trail run along Northern California's Mendocino Coast, featuring river crossings, redwood forest sections and waterfalls. The course finishes on the Mendocino Village bluffs with views over the Pacific Ocean.

Point Mugu Trail Run in Malibu features a 13.3 mile half and a 6.9 mile 10k with ocean view switchbacks and a steep Fireline climb. The event includes a finisher medal, free course photos and post race food and a beer garden.

Horseshoe Lake Trail Run features 5 mile to 50K options plus a free kids dash on scenic Skyline Ridge with Pacific views. Marked trails, stocked aid stations, and finisher medals make it a rewarding day for trail runners.

Join the 3rd Annual Porterville 5K and 10K Trail Run on April 18, 2026 at Porterville Military Academy for dirt path out and back courses, kids races and a virtual option. Enjoy shirts, medals, chip timing and support the local EAA chapter.