Trail Running Calendar California 2025-2026

The Lost Trail Half Marathon and 5K take place at Granite Beach, Folsom Lake State Recreation Area, offering runners scenic lake views and vibrant wildflowers along well-marked courses. The half marathon covers 13.1 miles, while the 5K is 3.1 miles. The event features five aid stations strategically..

The Montara Mountain Trail Run takes place Saturday, February 21, 2026, at San Pedro Valley Park, 600 Oddstad Boulevard, Pacifica, CA 94044. The event offers multiple distances: 10K Half Marathon 20 mi Marathon 50K Kid's Run (6yo & younger) - 50yd dash (free) The course runs on Montara Mount..

FOURmidable is a challenging trail running event held in Auburn, California, set in the scenic Sierra Nevada foothills. The race offers multiple distances including a 50K, 35.5K, half marathon, and 13K, catering to a range of endurance levels. Participants experience rugged terrain and picturesque n..

The San Pasqual Valley Trail Race is the 9th annual running event in San Diego wine country. It takes place on February 21, 2026 at the San Pasqual staging lot, 18194 Bandy Canyon Rd, Escondido, CA. The course runs through vineyards and orange groves and offers scenic views along the valley. Three..

Sycamore Canyon is a trail running event held at the scenic Goodman Ranch Sycamore Canyon Preserve near Poway, California, just east of San Diego. The race offers multiple distance options including a 100K (solo or 4-person relay), 50K (solo or 4-person relay), and a half marathon. The course is a l..

The Salmon Falls 50K Endurance Run is a challenging trail race set in the scenic foothills of Sacramento, California. This ultra-distance event starts at the Magnolia Ranch Trail Head near Coloma and features a stunning course that traverses the Cronan Ranch area, ultimately finishing at Folsom Lake..

Zoom Angel Island is a trail running event on Angel Island, accessible via chartered ferries from Tiburon, California, offering spectacular views of Marin County and San Francisco. Distances include 5 miles, 10 miles, 15 miles, plus a Kids Run (free). The hilly course circles the island and climbs M..

Way Too Cool 50K, the iconic 36th annual ultramarathon held in Cool, California, offers a 50K trail race and an expanding 10-mile endurance option. Runners navigate rolling Northern California hills, creek crossings, and breathtaking scenery, making it a beloved tradition in the ultrarunning communi..

Old West Trail Runs takes place near Julian, California, with start/finish at Stagecoach Trails RV Resort. The event offers 50K, marathon, and half marathon options, with the 50K and marathon totaling about 2,500 feet of elevation gain and loss, and the half marathon around 670 feet. Runners navigat..

The Back On The Ranch Trail Run is scheduled for October 3 and 4, 2025 in Los Olivos, CA. The event offers multiple timed and multi-hour formats for participants over two days. Distances and formats: 3 hour 6 hour 12 hour 24 hour 48 hour A runner guide for the 2025 event and an organizer liabilit..

The Back On The Ranch Trail Run is scheduled for October 3 and 4, 2025 in Los Olivos, CA. The event offers multiple timed and multi-hour formats for participants over two days. Distances and formats: 3 hour 6 hour 12 hour 24 hour 48 hour A runner guide for the 2025 event and an organizer liabilit..

The Catalina Island Marathon, along with its 10K and 5K distances, takes place in Avalon, California on Catalina Island. The event features the full marathon (26.2 miles), a 10K (6.2 miles), and a 5K (3.1 miles), plus a Kids Run, drawing runners to the island’s scenic trails. It is the oldest trail..

The Marin Ultra Challenge is Inside Trail Racing’s premier Marin County long-distance trail race, offering 50-mile and 50K options. The route starts at Rodeo Beach and loops through the Marin Headlands, Mt. Tamalpais, and Muir Woods, delivering coastal and inland vistas, varied terrain from exposed..

The Ruck a Chuck 50K is a trail running event held in Foresthill, California, set in the scenic Sierra Nevada foothills. This 50-kilometer race features an out-and-back course starting at Drivers Flat and turning around at Dardanelles Creek. A key highlight is its route along sections of the histori..

Pirate's Cove 6/12/24 Hour Run/Hike is a multi-distance trail event at Lake Cuyamaca, California. The 6-, 12-, and 24-hour options offer a long-duration challenge for runners and hikers. The event is scheduled for Friday, March 20, 2026.Course specifics are posted on the official site (sdpiratescove..

VALENCIA Trail Race takes place in Valencia, California, offering three trail distances: 10K, Half Marathon, and 50K Ultra. Set amid Southern California’s hills, the course climbs to peaks, follows ridgelines, and traverses canyons with panoramic views of the Santa Clarita Valley. The route is 70% s..

Rattlesnake Dick is a trail ultramarathon presented by North Fork Clothing, held in Cool, California at the Cool Staging Area (7200 Saint Florian Court). The event offers three distances: 50K, 25K, and 10K, all with generous 10-hour cut-offs and back-of-the-pack friendly courses. Runners ascend and..

Redwood (Spring) Trail Run is held at the Chabot Space & Science Center in Oakland, California, featuring multiple distances from 5 miles up to 50K, plus a Half Marathon, Marathon, 30K, a 5K, and several youth events. The course winds through Redwood Regional Park, offering spectacular views along t..

2026 Napa Valley Trail Marathon, Half Marathon & 10K takes place at Bothe-Napa Valley State Park in Saint Helena, California. The event offers three trail distances: marathon, half marathon, and 10K. Runners tackle lush single-track with hills, streams, and rocky sections; the course is marked with..

Bad Ass Backyard Ultra (B.A.B.U.) takes place at Dry Creek Parkway in Rio Linda, Sacramento, California. The event uses the traditional backyard ultra format: a 4.16-mile loop with a new loop starting each hour; anyone not in the start corral at the hour is eliminated, and the winner completes the m..