Trail Running calendar near Simi Valley 2026-2027

A multi-distance trail event in Los Padres National Forest near Ojai, CA, on May 1 to 3, 2026, offering distances up to 100 miles with large elevation gains and a 150-entry limit; qualifying requirements apply for the longer races.

A multi-format trail running event at East Walker Ranch Open Space on May 2-3, 2026, offering fixed distances, 6/12/24-hour categories, relay teams, on-site camping, cupless aid stations, and themed finisher medals.

A family-friendly, non-competitive 5K trail run/walk and 1 mile walk at Elysian Park in Los Angeles on May 2, 2026. Proceeds support CurePSP’s work on PSP, CBD and MSA; post-event food, lawn games and music are planned.

A 10K trail run and hike on May 3, 2026, covering 6.2 miles with 1,686 feet of elevation gain. The Brand Park course climbs to 2,536 feet and offers wide views of the Los Angeles Basin and the San Gabriel Mountains.

Trail loop courses at Crystal Cove State Park feature ocean views and hill climbs; proceeds support the John Wayne Cancer Foundation and fundraising runs the week of April 20 to 26, 2026.

Singletrack Stampede on May 9, 2026 in Calabasas CA offers 10k and 22k trail races through varied canyon terrain, included race photography and breakfast, and a $500 course record bonus for the 22k.

An 80s inspired martial arts themed race day in Canoga Park on May 16, 2026 offering 5K, 10K and a 13.1 mile half plus a virtual option with medal shipping.

A mountain trail race in Sierra Madre on May 23, 2026 featuring an 8.6 mile out-and-back course from Kersting Court to Orchard Camp, a Kids Fun Run, and community-led trail repair efforts supported by the Fletcher Trail Maintenance Fund.

Páli Peak Trail Run takes place May 23, 2026 in Bakersfield, California and offers in-person and virtual 5K, 10K and 21K options. Race day includes packet pickup, pre-race announcements, awards and closing announcements.

A one-day event at Hahamongna Watershed Park on May 24, 2026, offering a 50K team relay, a 50K solo ultramarathon, and a 10K Fun Run for solo participants.

Looped trail races at West Creek Park in Valencia offering 5k, 10k, 15k and a half marathon with aid stations each loop. Registration includes a finisher medal, goodie bag, free photos, and results posted within 24 hours.

A 5k trail run at Black Star Canyon in Silverado, California, with mixed fire road and single track, 390 ft elevation gain, one aid station, a cupless policy, and pre-run access restricted to authorized days.

Pacifico Ultra is a fully supported trail race on Pacifico Mountain in the Angeles National Forest, offering a 50k with 5,621 ft of vertical and several half-marathon formats, aid stations, finisher medals and a finish festival with food an..

An annual 5K and 10K run and walk in Rolling Hills Estates on May 30, 2026, using the city bridle trails around Ernie Howlett Park. Overall and age division winners receive plaques and medals.

Free, social group run by Aravaipa at El Moro and Laguna Coast Wilderness Park in Newport Coast on May 30, 2026. The route is about 5.5 miles with roughly 500 feet of ascent, some rocky sections, and post-run snacks and a raffle.

Trail races at Point Mugu State Park in Malibu, CA on June 6, 2026, offering distances from a half marathon up to 100K; registration closes June 1 at 11:59 PM PT.

The City of Fullerton’s inaugural Fullerton Fit 5K Trail Run takes place June 6, 2026 on a dirt course near Brea Dam, accompanied by a Health & Wellness Fair with vendors, demonstrations, and food trucks.

A trail marathon relay and 8K in Griffith Park on June 7, 2026, featuring a true loop course with varied terrain, team relays or solo 8K, three aid stations, chip timing, race shirts and medals, music, food trucks and cash awards.

A four race series of open 5 km races at Panorama Vista Preserve in Bakersfield, with Youth, High School and Adult divisions, two waves, a 45 minute time limit, and series scoring that counts each runner's best three races.

A multi-distance trail running event at Griffith Park on June 13, 2026, offering 5k, 10k, 15k and a half marathon on hard-packed horse trails with an aid station, finisher medals, free photos, and posted results.