Trail Running Calendar California 2025-2026

The Wildwood Canyon Trail Run takes place in Wildwood Canyon State Park, Yucaipa, California, featuring a scenic 3.6-mile loop course with nearly 600 feet of vertical gain per loop. Participants have 8 hours to complete as many loops as possible, showcasing the park's rugged canyons, meadows, and oa..

The Griffith Park Trail Marathon is a scenic trail running event held in Los Angeles, California, within the iconic Griffith Park. The race features multiple distances including a marathon, 50K, 30K, half marathon, and 10K, all showcasing a mix of beautiful single-track trails and double-track fire..

The Rio Del Lago 100 Mile Endurance Run is a premier ultramarathon held annually in the scenic Sierra Nevada Foothills near Folsom, California, about 40 minutes east of Sacramento. The challenging 100-mile course features approximately 13,874 feet of elevation gain and loss, traversing diverse terra..

The Roosters Backyard Ultra will take place in San Diego on Saturday 1 November 2025.

The Kaweah Lake Bottom Trail Run is a scenic trail race held in Three Rivers, California, just six miles from Sequoia National Park's entrance. Scheduled for November 1, 2025, the event features 5K and 10K out-and-back courses combining paved and dirt trails along the lake bottom near slick rock for..

The ZombieRunner Halloween is a festive running event held at Hellyer County Park in San Jose, California. Scheduled for November 1, 2025, it offers a variety of race distances including 5K, 10K, Half Marathon, Marathon, and age-specific 5K and 10K races, plus a free 50-yard Kid's Run for children s..

The Santa Clarita Trail Race is an epic trail running event held in the golden hills of Santa Clarita, California, specifically at East Walker Ranch in Placerita Canyon. Scheduled for November 1, 2025, it offers multiple race distances including 5K, 10K, Half Marathon, and a challenging 28K. The cou..

The Mount Laguna Trail Marathon, held in Mount Laguna, California, is a well-organized Southern California trail race featuring a challenging single-loop course of technical single-track trails. The marathon covers rolling terrain with a total elevation gain of 3,358 feet. The first half of the cour..

The Oakland Tech 5km Fundraiser Race and 1 Mile Fun Run/Walk takes place at Joaquin Miller Park Meadow in Oakland, California. This event features a 5K trail run and a 1-mile fun run/walk, offering participants scenic views with towering trees and a course that is both enjoyable for casual runners a..

The NorCal Backyard Ultra, held at Beals Point in Granite Bay, CA, is a challenging endurance running event featuring a 4.2-mile loop course along scenic singletrack trails and lakefront views at Folsom Lake. The main event, Last Person Standing, requires runners to complete a loop every hour until..

The Tulare Santa Fe Trail-A-Thon 5k is an annual community running event held in Tulare, California, hosted by the Tulare Sunrise Rotary Club. The 23rd edition takes place at Live Oak Park, featuring a scenic 5-kilometer route that begins and ends at the park, providing ample space for participants..

The Lake Chabot Trail Run, held in Castro Valley, California, offers a variety of distances including 8K, Half Marathon, 30K, Marathon, 50K, and a free Kid's Run for children six and under. The course begins at the Lake Chabot Regional Park Marina and loops around the scenic Lake Chabot reservoir an..

The Mermaid Trail Run in Woodside, CA, is a scenic trail running event held at Huddart Park, featuring towering redwoods and lush forest trails. Scheduled for November 8, 2025, it offers multiple race distances including 3, 6, and 9 miles, a half marathon, and a unique 6-hour challenge where partici..

The Rancho Hills Trail Run - Fall is a challenging trail running event held at the Rancho Cañada del Oro Open Space Preserve in Morgan Hill, California. The race offers a variety of distances ranging from 5K to 50K, including 8-mile, 10-mile, half marathon, 30K, and trail marathon options. The cours..

The Mt. Tam Trail Run, held at Stinson Beach, California, offers challenging trail races of 10K, half marathon, 30K, and 50K distances. The course features steep climbs up Mount Tamalpais with stunning views, followed by scenic trails through the Headlands, finishing back at the beach.The event acco..

The Catalina Island Half-Marathon & 10K is a scenic trail running event held in Avalon, California. The half-marathon covers 13.1 miles, starting in Avalon and passing the historic Wrigley Mansion before entering Catalina Island’s rugged interior. Runners face challenging climbs leading to breathtak..

The Sri Chinmoy 6-Hour Race in San Diego is a timed endurance event held at Miramar Reservoir, featuring a scenic 5-mile asphalt loop around a serene urban lake. Participants run or walk clockwise on a mostly flat course with gentle hills, sharing the path with pedestrians and cyclists in separate l..

The Rancho Ramble Trail Run takes place at Santa Margarita Ranch in Central California, offering runners a scenic experience across rolling grassy hills, open cow pastures, and oak-lined arroyos. The course features deceptively steep and long hills with varied terrain that challenges footing and rhy..

The Wascally Wabbit Trail Race, held in Friant, California, takes place at the scenic Finegold Creek Preserve managed by the Sierra Foothill Conservancy. This trail event offers two distances: a 10k and a 7k run/walk, providing participants with a rewarding outdoor experience through protected natur..

The 4 Mile Hill Challenge is a scenic and challenging running event held at the Audubon Center at Debs Park in Los Angeles, CA. The course features rolling hills and all-trail terrain within a historic park, starting and finishing at the nature center. Open to all levels, the race includes hydration..