Trail Running Calendar California 2025-2026

Located in Big Bear Lake, California, HOKA Kodiak Ultra Marathons by UTMB offers a two-day festival vibe in a rustic mountain town near Los Angeles. The event features five races: 100M (160 km, 5200 m gain), 100K (100 km, 3050 m), 50K (50 km, 1500 m), 21K (20 km, 600 m), and 10K (10 km, 280 m). Cour..

Live Oak Odyssey is a fixed-time trail run held at O’Neill Regional Park in Trabuco Canyon, California. It offers 3- and 6-hour options on a 2.75-mile loop with about 500 feet of vertical gain per lap, challenging runners with a mix of ups and downs, single-track, and double-track sections. The wood..

Go Wild Marin offers a trail and wilderness navigation challenge in Corte Madera, California, with 2-hour and 4-hour options. Teams of 1 to 5 use a custom map to locate up to 24 checkpoints scattered along trails and wild areas of the Tiburon Peninsula. The event emphasizes exploration and navigatio..

Granite Head 2025, billed as Granite Bay’s Best Trail Run and part of Trails & Ales, is a two-distance trail race presented by Altra in Granite Bay, California. Runners can tackle a gnarly 6.6-mile short course or an epic 11.2-mile long course. Both start and finish at Granite Beach, with the course..

The Rock It in Chino Hills 5K & 10K is a trail running and hiking event held at Chino Hills State Park in Brea, California. Participants can choose between a 5K or 10K course that showcases the park's stunning and expansive trails, offering scenic views and a tranquil outdoor experience. The race in..

The Mt. Umunhum Trail Conquest-Fall is a trail running event held at Almaden Quicksilver County Park in San Jose, California. The race offers multiple distances including a 5K, 7 Mile, Half Marathon, 30K, Trail Marathon, and 50K.The longer courses venture into the scenic Sierra Azul Open Space Prese..

Set in Gonzales Canyon Open Space in Carmel Valley, San Diego, the Carmel Valley Trail Race offers trails through scenic open space with rugged climbs. The 12th annual event starts and finishes at Solana Ranch Park in Gonzales Canyon, featuring three distances: 15K, 10K, and 5K. The 15K and 10K rout..

Euchre Bar Massacre is an ultramarathon near Foresthill, California, offering 25- and 50-mile fatass-style routes along the North Fork of the American River. The rugged course ladders about 10,000 feet of climbing for the 25-mile option and roughly 20,000 feet for the 50-mile, with substantial bushw..

Ruth Anderson Memorial Endurance Run is an ultramarathon held in San Francisco, California, circling Lake Merced. Runners complete a multi-lap course on a 4.475-mile paved bike path, with aid stations at the start/finish and each loop. The event features distances associated with a 50M designation,..

Set on the Bizz Johnson Trail in Lassen National Forest, this USATF-certified event offers a fast, mostly downhill course from Mason Station near Westwood to Susanville. Distances include 50K and Marathon (each a point-to-point race with a 929-foot net downhill and a 1,300-foot descent in the final..

The event is a time-based trail run held at Skyline Wilderness Park in Napa, California. Runners compete to cover as much distance as possible within a chosen time limit. The event capacity is 400 participants across all options. 12 Hour 6 Hour 3 Hour The course is a loop of 4.16 miles with appr..

Champion Mine Trail Race is held in Nevada City, California, featuring two events: a half marathon (13.1 miles) and a 5K Fun & Fitness Run/Walk. The inaugural race from the Bear Yuba Land Trust and Sierra TrailBlazers uses a dynamic mix of pavement, gravel, and single-track trails, with rewarding cl..

Vampire Run - Unite for Bleeding Disorders is held in Roseville, CA, at Vernon Street Town Square in Downtown Roseville. It features a first-ever 5K on the Roseville trails, offered as a timed run with adult 5K and child 5K (under 14) and adult and child 1-mile options. The event fosters a festive,..

The John Lawson Tamalpa Challenge is a three-race cross-country event held at Miwok Meadows in China Camp State Park, San Rafael, California. Each 4.2-mile course follows rolling single-track trails with about a quarter-mile on asphalt, starting near the Miwok Meadows gate and finishing in the Miwok..

The SPACEROCK Trail Race takes place on October 18, 2025, at Vasquez Rocks Natural Area Park in Agua Dulce, California. The event offers multiple trail distances and is organized by New Global Adventures. Entry prices vary by distance and registration period; listed price range is $70 to $215. Race..

Set on the Cahuilla Indian Reservation in Anza, California, Cahuilla Rez Ultra is a Native‑organized fundraiser for the tribe’s Youth and Family Programming. Runners can choose from a 100‑mile option, 24, 12, and 6‑hour races, a half marathon, and a Tribal Member 5k. The course is a scenic 2‑mile lo..

The Diablo Summit Stomp takes place on October 18, 2025 in Walnut Creek, California (1700 Castle Rock Road). Distances offered are: 30K Half Marathon 10K 5K All distances are run on dirt trails in Castle Rock Park and Mount Diablo State Park. The 30K route reaches the summit of Mount Diablo. Walk..

California Gold Rush Trail Run - Fall, Oct 18, 2025, is set in Marshall Gold Discovery State Historic Park in Coloma, CA, about 40 miles from Sacramento. The event offers Kids Run (1 mile) plus 5K, 10K, 15K, and half-marathon distances, all within the historic site that sparked the gold rush of 1848..

The California Fall Classic at Lake Sonoma offers challenging 100K and 55K ultramarathon races set in the scenic wine country of Lake Sonoma, California. Known for its relentless courses featuring miles of single-track trails with stunning lake views, the event takes place in the fall, providing coo..

The Jackalope Lope is a trail running event held in Whiskeytown National Recreation Area near Redding, California, known for its challenging terrain and significant elevation gain. Participants can choose from three distances: an 8.5-mile run, a 20.5-mile race, or a new 50-kilometer course. The even..