Simi Valley
Trail Running Calendar near Simi Valley 2026-2027
Explore the top trail runs near Simi Valley for 2026-2027! We've gathered 26 exciting trail runs in the area. Check out our detailed list below to find your next local trail run.
August 2026
Free weekly 5 km community event at Upper Las Virgenes Canyon Open Space Reserve in Woodland Hills, organised by volunteers; bring a scannable barcode for a recorded time.
Course preview at Rancho Simi Park in Simi Valley with marked looped routes, aid stations each loop, and options from 5k to half marathon.
September 2026
A one-day cross country meet in Santa Clarita on September 5, 2026 featuring a 4K open race for runners 19 and older with a $15 entry fee.
A trail 10k and a non-timed 4.5 mile Hiker's Delight in Red Rock Canyon with steep fireroad climbs, singletrack, aid stations, shuttle-only access and festival amenities.
Trail running event in Simi Valley with 50K, 30K and 15K routes through Rocky Peak, Las Lljas and Tapo Canyon and multiple aid stations.
October 2026
An obstacle course mud event in Castaic with a chip timed 4 mile and a 1 mile kids fun run, plus on site showers and changing tents.
Halloween themed 5k, 10k, 15k and half marathon at West Creek Park in Valencia on October 4 with looped courses, aid stations, medals and race day registration.
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 races in Cheeseboro Canyon offering 50k, Half Marathon and 10k courses across varied singletrack, fire roads and scenic climbs with aid stations and post-race festival amenities.
November 2026
The 30th Patagonia Salmon Run in Ventura on November 15, 2026 is a 3.14-mile event supporting Santa Barbara Channelkeeper with a zero-waste focus and limited online registration.
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.
December 2026
Holiday-themed Jingle Bell races in Valencia on December 6 offering 5k, 10k, 15k and a half marathon on marked looped trails with aid stations and finisher medals.
Five trail distances at Paramount Ranch on December 19, 2026, run on singletrack and fire road with mapped elevation profiles.
January 2027
A 68 mile trail race across the Santa Monica Mountains with about 13,600 feet of elevation gain, offering solo and relay entries and a field capped at 200 runners.
February 2027
Trail running at Will Rogers State Historic Park in Pacific Palisades with distances from 10K to 100 mile and 6 12 and 24 hour timed options.
A family friendly run and walk in Valencia CA featuring 1K, 5K and 10K options plus virtual races. The USATF certified course runs along the South Fork River Trail and proceeds support Students Off And Running with an expo and festive activities.