Trail Running calendar near Pasadena 2026-2027

A one mile uphill race at Snow Summit in Big Bear Lake with a 1,000 foot climb starting near 7,000 feet elevation. The event raises funds for Big Bear High School cross-country through the BBHS Bear Backers 501(c)(3).

A 5k trail run at Red Rock Wilderness near Silverado, CA featuring fire roads and single track, 300 feet of climbing, one aid station, a cupless policy, and no pets allowed.

A free, one-day community trail running festival in Los Angeles on August 29, 2026 with a group run in 5K and 10K options, an expo with vendors and race directors, food, and a raffle showcasing local running resources.

The 61st Mt Baldy Run to the Top on September 7, 2026 is a fundraising mountain trail race in the Angeles National Forest covering about 7 miles with 4,000 feet of ascent to the 10,064 foot summit, with proceeds aiding local services.

Tough Mudder Big Bear on September 12, 2026 features 5K and 10K obstacle courses at Bear Mountain in Big Bear Lake, CA, with finisher medals, shirts, headbands and spectator and group options.

A Stadion 5 km obstacle race with 20 obstacles at Angel Stadium of Anaheim on September 12, 2026, plus a kids race and spectator options; the Stadion shows an average duration of about 1 hour 32 minutes and a 4.8 rating from 40 testimonials..

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 Topanga trail event with a sunset 10k featuring about 1,360 ft of vertical and a non-timed 4.5 mile Hiker's Delight. The event offers aid stations, a 21 plus beer garden, plant-based tacos, sports massage and awards.

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.

Trail races of 50K, 30K and 15K around Corriganville Park in Simi Valley with sandstone outcrops, oak savannahs, water sources and mountain and ocean views. A portion of proceeds supports the Challenged Athletes Foundation.

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 loop-based endurance event on Malibu's Chumash Trail with a 3-mile loop and about 1,250 ft gain per loop. It offers two divisions including X HEAVY with escalating weight and uses the motto "Every loop heavier. Every loop harder. Only one..

A 5K at Ernie Howlett Park on the Palos Verdes Peninsula with a shaded horse-trail course, in-person and virtual options, and a fundraising entry where raising $100 covers registration and benefits Strides in Recovery.

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.