Trail Running Calendar California 2025-2026

Rio Del Lago 100 Mile Endurance Run is a premier ultramarathon held at Beal’s Point in the Folsom Lake State Recreation Area, about 40 minutes east of Sacramento. The event features a 100‑mile race and a 50K endurance run, both looping from Beal’s Point toward Auburn and back along the American Rive..

The 39th Golden Gate Park XC Open, held at Lindley Meadow (30th Ave & JFK Dr) in San Francisco's Golden Gate Park, is a 5k cross-country race over grass, dirt, and rolling hills. It features Masters Women 40+ and Masters Men 40+ along with Open Women and Open Men, and serves as the USATF Masters 5k..

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. Set in a historic area where gold was first discovered in 1842, the race offers stunning and diverse landscapes featuring challeng..

Almaden Hills Trail Run - Fall takes place in Almaden Quicksilver Park in San Jose, California. The event offers multiple distances: 50K, Trail Marathon, 30K, Half Marathon, 8 Mile, 10K, and 5K, appealing to a wide range of runners. The course combines 60% dirt roads and 40% single-track trails, and..

Wildwood Canyon Trail Run takes place in Wildwood Canyon State Park, Yucaipa, California. The event features an 8-hour loop course: a 3.6-mile loop with roughly 600 feet of vertical gain per lap, offering rugged canyons, meadows, and oak-studded terrain. Runners may complete as many loops as time al..

Griffith Park Trail Marathon, organized by KH Races, is held in Los Angeles’ Griffith Park, starting at the Merry-Go-Round Lot 1. The event offers multiple distances: 50K, Marathon, 30K, Half-Marathon, and 10K. The course is an out-and-back route weaving through the park’s trails, mixing single-trac..

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..

ZombieRunner Halloween is held at Hellyer County Park (Buena Vista Pavilion) in San Jose, CA, along the Coyote Creek trail. The event features distances of 5K, 10K, Half Marathon, and Marathon, plus youth options: 5K for under 12, 5K and 10K for ages 13-17, and a free Kid's Run (6 and younger, 50 yd..

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..

NorCal Backyard Ultra returns to Beals Point at Folsom Lake, near Granite Bay, CA, for its third edition. Two formats: Last Person Standing (4.2-mile loop, hourly until one remains) and Mini Last Person Standing (24 hours). The scenic course runs on rolling singletrack with lakefront views.No on-cou..

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 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 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..

Lake Chabot Trail Run is a multi-distance trail race held at Lake Chabot Regional Park – Marina in Castro Valley, CA. The event offers 8K, Half Marathon, 30K, Marathon, 50K, and a Kids Run, inviting runners of varied backgrounds. The course starts at the Marina and loops around the Lake Chabot reser..

Mt. Tam Trail Run, staged by Inside Trail Racing, starts in Stinson Beach, California, at Mt. Tamalpais State Park.Runners tackle four distances—50K, 30K, half marathon, and 10K—on technical dirt trails and non-technical fire roads with steep climbs and stunning coastal views. Elevation gain ranges..

Rock Cobbler RUN is an off-road trail event in Bakersfield, California, held at Rio Bravo Ranch. The full Cobbler covers about 26 miles (41.8 km) with roughly 4,500 feet of vertical gain; the shorter Pebbler is about half that distance. The vibe is a brutal, adventure‑driven challenge with a Bakersf..

Mermaid Trail Run – Woodside takes place at Huddart Park in Woodside, California. Runners can choose from multiple distances, including 3, 6, and 9 miles, a half marathon, a 6-hour challenge (individual or 2-person relay), as well as a kids’ Mermaid Dash and a virtual run. Participants run, hike or..

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

Situated at Miramar Reservoir in San Diego, the Sri Chinmoy 6-Hour Race challenges runners to a 5-mile loop around the lake. The mostly flat, clockwise course has four aid stations for fuel and encouragement. Gear storage is available near the main staging area at the dam on the lake’s west end; lap..