Trail Running Calendar California 2026-2027

The Sludge Trudge 5K is a paved run/walk at North Natomas Regional Park. It's a sanctioned event with professional timing and awards for top finishers. The event is hosted for a specific community group and their guests.

Experience the scenic beauty of the Santa Monica Mountains at the 41st annual Great Race. Choose from multiple distances including a panoramic half marathon, 10K, and 5K, followed by a large post-race celebration in Chumash Park.

Run with the Burros is a pack burro race and trail run near Inyokern, CA held the second Saturday of April, offering 5, 10, 18, and 26.2 mile courses and raising funds for volunteer donkey charities.

Experience a scenic trail run around Angel Island with panoramic views of the Golden Gate Bridge and San Francisco. This event features a hilly loop course for both Half Marathon and 10K distances with ferry transport included.

Experience California wine country at this premier trail festival featuring a Western States Qualifier 100K, a scenic 50K, and a women-only half marathon around the beautiful shoreline of Lake Sonoma.

A two day trail and gravel event at Diamond Valley Lake near Hemet offering distances from a 1 mile kids run to a 26.2 mile trail marathon, plus stroller, youth and multi lap gravel rides around the lake.

A 50K out and back trail run near Julian, California, that drops into Oriflamme Canyon, traverses Box Canyon and Blair Valley, and returns via a long climb. The course follows the Pacific Crest Trail and has a nine hour time limit.

Trail races at Lake Chabot Regional Park in Castro Valley range from a 50 yard kids dash to a 50K ultradistance. The routes circle the reservoir and surrounding hills and distances were measured with a Rolatape surveyor's wheel.

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.

Explore the rolling hills of Cronan Ranch at the Magnolia Magic River Trail Run. This event offers a range of distances on dirt and rock trails, from a 5K to a 50K ultra. All participants receive a medal and access to aid stations along the..

A community trail run at Ernest Debs Park organized by True Heart Fitness. The loop follows several named trails, passes Debs Lake, and includes steep sections; participants are responsible for their own safety.

A mountain trail event in Calistoga offering 10K to 50K courses that mix fire road and technical single-track, with multiple aid stations, on-mountain logistics, and UTMB Index status for several distances.

Experience the beauty of the Ruth McKenzie Table Mountain Preserve in Clovis. Run through grasslands and oak woodlands with distances available for all levels including a half marathon and kids races.

Join this community focused event at Ventura Beach featuring multiple distances from 5k to a half marathon. Enjoy a relaxed run along beach path loops with finisher medals, photos, and snacks included for all participants.

Step back in time for a totally tubular run in Huntington Beach. This 80s themed event features a 5K, 10K, and Half Marathon on a flat, scenic oceanfront course. After the race, enjoy a costume contest, a beach party with a live DJ, and an..

Experience a scenic trail run along the San Francisco coast with views of the Golden Gate and Pacific Ocean. This five kilometer event awards ribbons to all finishers and top category performers.

The Run4Kids Ultra Running Party features a wide range of distances and timed events, from a half marathon to a 24-hour ultra. The event raises funds for youth running programs. It takes place in Corona, California.

Experience an 81 mile team ultra run from the desert floor to Palomar Mountain. Run together in teams of two or three through extreme elevation changes and diverse California terrain within a 28 hour limit.

On April 18, 2026 Outlands offers 25K, 50K and 50 mile trail courses near Pilot Hill, CA along Folsom Lake with runnable singletrack, steady climbs and stocked aid stations.

Experience a historic trail event in Lake Hughes featuring distances from 30k to 100 miles. Conquer the terrain and earn a Western States 100 qualifying time on the scenic 100k or 100 mile courses.