Altadena
Trail Running Calendar near Altadena 2026-2027
Explore the top trail runs near Altadena for 2026-2027! We've gathered 48 exciting trail runs in the area. Check out our detailed list below to find your next local trail run.
October 2026
A 100-mile endurance run through the San Gabriel backcountry with an updated out-and-back course from Loma Alta Park, official training runs, and pre-race logistics the day before.
Cirque Series at Mt Baldy on 10/03/2026 is an inaugural trail race featuring a 9.1 miles course with 3,926 ft of vertical gain and separate competitive divisions.
Halloween-themed running at West Creek Park in Valencia with 5k, 10k, 15k and half marathon loop courses, aid stations, and custom finisher medals.
A stair-climbing event in Central Park, Santa Clarita on October 10, 2026 to raise awareness for rare diseases; registration fee $20 and donations accepted.
Trail running at Vasquez Rocks Natural Park in Aqua Dulce, CA with 13.9 mile, 15K, 10K and 5K race options on October 17, 2026.
A Halloween costume 5K at Lake Palmdale on October 17, 2026 with medals for finishers, cash prizes for the top three, and post-run music and vendors.
A 5K fundraising event in Los Angeles for Dyslexia Awareness Month with in-person and virtual options; proceeds support educational programs and resources.
A brand new Halloween morning trail 5K at Pelona Vista in Palmdale that climbs the local big hill, with a costume friendly club atmosphere and $25 registration.
November 2026
Night trail races of 5K and 10K at Marvin Braude Mulholland Gateway Park in Tarzana, with required headlamps, marked courses, aid stations, and on-course medical support.
Sandy Sprint California is a charity 5K run/walk at Griffith Park on November 8, 2026, hosted by the Sandy Rollman Ovarian Cancer Foundation to raise funds for research.
Charity run in Griffith Park on 11/14/2026 with pet and human divisions; proceeds support Run for Paws, which helps dogs in need.
Trailsgiving at Elysian Park on November 14, 2026 offers 5k, 10k, 15k and half marathon trail routes on hard-packed dirt with marked out and back loops.
Multiple distance races including 5K, 10K, 15K and a half marathon at Whittier Narrows Recreation Area on November 15, 2026, with aid stations and finisher medals.
Trail running event in Griffith Park on November 21, 2026 offering distances from 10K to 50K on singletrack and fire road.
A Thanksgiving Day community run in Santa Clarita offering a 5K cross country course through Central Park and a 1K for children. The event benefits the Santa Clarita Track Club and awards medals to the first 600 competitors.