Trail Running Calendar California 2026-2027

Event Overview The Pacific Crest Trail 50 is a 50 mile ultramarathon. The 2026 edition is scheduled for June 6th. It takes place in the Cleveland National Forest in east San Diego County, California. This is the event's 44th year. Course De..

A trail event in Humboldt Redwoods State Park on June 6, 2026 offering 30K and 10.5 mile courses that climb Grasshopper Peak and finish in a grove of old growth redwoods. Online registration closes June 3.

The inaugural Fullerton Fit 5K Trail Run offers a scenic dirt trail course through the Brea Dam area. The event also includes a Health & Wellness Fair with local vendors and food trucks. Registration includes a shirt, medal, and other race..

A community run and expo in San Francisco on June 6, 2026 featuring group runs of 3.2 miles and 4.5 miles, vendor booths, a pancake breakfast, and a raffle with prizes.

Experience a scenic 10km loop through the Auburn State Recreation Area featuring rolling hills and oak forests. This trail run offers a mix of creek crossings and canyon climbs overlooking the American River.

The Cool Summer Night Run will take place in Cool on Saturday 6 June 2026. You can run 10 kilometers.

An annual trail race on the north shore of Lake Natoma in Fair Oaks offering 5K and 10K courses through wetlands, oak bluffs, and historic gold-dredge terrain, with proceeds supporting a local scholarship.

A trail event at Almaden-Quicksilver County Park on June 7, 2025 offering distances from 5K to 50K, steep climbs, marked courses, aid stations, and toilet facilities. The 52 mile race is not held in 2025 and is planned to return in 2026.

Trail runs on Lake Natoma’s north shore in Fair Oaks CA with 5K and 10K courses plus a kids run for under 10s. Hosted by the Fair Oaks Recreation and Park District with proceeds supporting a local scholarship.

Experience a team relay or individual 8K through the scenic trails and fire roads of Los Angeles' Griffith Park featuring a festive tailgate atmosphere with DJs and food trucks.

Experience the 42nd annual Lake Chabot Trail Challenge featuring a scenic half marathon loop and a paved 5K run. Enjoy views of the San Francisco Bay and Mt Diablo while competing for medals on chip timed courses.

Experience an incredible journey around the largest alpine lake in North America. This 200 mile ultramarathon traverses single track trails and ridge lines through the spectacular Desolation Wilderness.

A multi-day trail weekend in Big Bear Lake on June 12–14, 2026 featuring a three-day TransRockies stage race plus single-day Holcomb Valley races from 5 to 33 miles, published elevation profiles, and specific entry and refund policies.

Experience a point to point 100 mile ultramarathon from UC Berkeley to Oakland. This trail race features 18,000 feet of elevation gain through redwood forests and scenic ridgelines with expansive California views.

Experience the scenic trails of Northern California with distances ranging from a 5K to 100K. Run through historic trails and varied terrain using a well-marked loop system with full aid station support.

A 100-mile endurance run near Cool, California composed of two marked loops repeated to reach 100 miles, with about 13,600 feet of elevation gain and live tracking. Finishers within 37 hours receive a Comstock Heritage silver buckle, shirt,..

Experience a scenic run through the historic 1960 Winter Olympics site at Palisades Tahoe. Choose between a half marathon, 8 miler, or 5K on flat paved trails following the beautiful Truckee River.

Event Overview The Summer Grand Prix is a series of four 5 km races held on Saturdays throughout the summer of 2026. All events take place at Panorama Vista Preserve in Bakersfield, California. Race Details The series consists of four indiv..

Experience a fixed-time event at Crissy Field with stunning views of the Golden Gate Bridge. Run or walk as many laps as you choose in three six or twelve hour blocks as an individual or part of a team.

Experience the scenic trails of Lagoon Valley Park at The Pena Passage. Choose from 30K, 10K, or 5K distances featuring rolling hills and oak groves in a natural setting.