Trail Running calendar near Green Valley Lake 2026-2027

An evening trail event in Griffith Park with 10 mile relays for teams of 2 or 4, a 5K solo race, a 1 mile kid run, and a free agent leg, on scenic, well marked courses with chip timing and on-course aid.

A Spartan obstacle weekend at Lake Elsinore Raceway features Sprint 5K, Super 10K, kids races, and multi-hour Hurricane Heat events on rugged, open terrain near a large natural freshwater lake.

A 3.1 mile trail event at Ascot Hills Park in Los Angeles with chip timing and views of Dodger Stadium and the Hollywood sign. Proceeds support the Wilson High School Fire and Police Magnet Cadet Program and Ascot Hills Park.

Trail ultras on Mt. Wilson in the Angeles National Forest offering 25K and 50K distances, technical single track, marked aid stations, panoramic views, and enforced cutoffs.

A trail event in San Marcos with a 10K, a not-timed 5K Fun Run, and a Kids Trail Trot that climbs to Double Peak summit; finishers receive wooden medals and shirts for the adult distances.

A themed run in Long Beach on September 27 with Half Marathon, 10K, 5K, a family mile and kids dash, ocean views, chip timing and a pizza themed finish line festival.

An annual 100 mile trail race through the San Gabriel back country in the Angeles National Forest, held since 1986. The 2026 edition uses a revised course with start and finish in Altadena and is a Western States and UTMB qualifying race.

A 9.1 mile mountain trail race at Mt Baldy on October 3, 2026, featuring 3,926 feet of vertical gain. Multiple divisions offer gear and cash prizes, timing with a disposable chip, and the event is capped at 700 entries.

A two day trail festival in Big Bear Lake, California featuring five distances and varied terrain around the lake. The 2026 event is the UTMB World Series Americas Major and serves as a dual qualifier for UTMB Finals and Western States.

Trail races of 50 Mile, 50K and 30K through Cleveland National Forest near Silverado CA on remote forest roads with significant climbing, staffed aid stations, drop bag support, and specific crew and pacer rules.

Ruff Run California on 10/17/2026 in Phelan, CA presents a 20 acre obstacle course for people and their dogs with over 20 obstacles, 4K and 1K options, and an after party with music, games and vendors.

A multi-format running event on the Cahuilla Indian Reservation in Anza, California, offering fixed-time races, a 100-mile option, a half marathon and a Tribal Member 5k while fundraising for youth and family programs.

A trail race at Vasquez Rocks Natural Area Park on October 17, 2026 offering Half Marathon+, 15K, 10K and 5K looped courses over rocky single track, a 500 foot tunnel on the Pacific Crest Trail, multiple aid stations, and finisher swag.

Trail races at Hahamongna Watershed Park on October 18, 2026 offering half marathon, 10K and 5K distances. The half marathon is presented as the organizer's flagship trail event and is reported to sell out quickly.

A 200 mile multi-day endurance run around San Diego County held October 23–26 in Escondido, California. The race has an 82 hour limit, requires a crew, and is limited to 24 experienced ultrarunners.

A trail race weekend at Los Coyotes Reservation featuring Single Loop, 6H Ultra and 24H Ultra options across desert and alpine trails. Ragnar Village provides camping, bonfires, food trucks and evening activities.

A team trail relay at Los Coyotes Reservation on October 23 and 24, 2026 featuring desert and mountain single track, a 112.8 mile course shared across teams, and on site camping plus glamping at Ragnar Village.

A trail running event at Caspers Wilderness Park on October 24, 2026, offering 10k, half marathon, 35k, marathon and 50k courses. Courses are described as marked and supported, with an athlete guide and past results available.

Trail running at Wildwood Canyon State Park on a 3.7 mile loop with about 600 ft vertical per loop; an eight-hour loop option and a 6K share the same course, with aid stations, vendors, a morning bluegrass band, and an after-party in Yucaip..

A multi-distance ultramarathon at Lake Perris featuring looped courses, significant elevation, on-course aid stations, group camping, pacer rules, and cash prizes for 100- and 200-mile podiums. The 200-mile race is noted as especially deman..