Trail Running calendar near Rio Linda 2026-2027

A 6.45 miles trail race in Annadel State Park organized by the Empire Runners Club, held in early September with staggered age and gender starts, limited to 100 runners and awards for the top 13 finishers.

Experience the trails of China Camp State Park with a selection of distances including a 5K 10K and Half Marathon. Participants enjoy a post race festival with beer steins custom medals and local snacks.

A September 12, 2026 trail event in Berkeley featuring 10K, half, 35K and 50K courses through Tilden and Wildcat Canyon with chip timing, regular aid stations and a cupless aid policy.

Run through Bishop Ranch and San Ramon in this diverse racing event. Choose between a half marathon, 10k, 5k, or beer mile before enjoying unlimited tastings with your finisher medal.

Mile Madness is a looped trail endurance event in Auburn, California, held September 18-21, 2026. Timed events run from 3 to 72 hours with a 0.75 mile loop and options including a 100 mile race plus on-site aid and amenities.

Trail runs at Granite Beach on Folsom Lake with new 10 mile and 5K courses, aid stations, age group awards, a finisher beer glass and a postrace meal.

Trail running event in Las Trampas Wilderness offering Half Marathon, 10K and 5K; the half marathon is noted as non-flat and features trails and views.

Dick Collins Firetrails in Castro Valley on September 26, 2026 features a Bay Ridge 100k, a Firetrails 50 mile and the Golden Hills Marathon with UTMB Index status and organizer specified time limits.

A community ultramarathon and hike at Skyline Wilderness Park in Napa, CA, featuring a 3.3-mile loop repeated up to ten times in an hourly format to raise funds for the Pheo Para Alliance.

Trail race in Auburn on September 27, 2026 featuring a half marathon plus 12K and 5K with much of the half on the Western States Trail.

Yuba Gold is a self guided *50K* point to point in Nevada City, CA held October 1 to 31, 2026. Runners complete the original South Yuba Campground to Bear Valley course, submit an activity link for ranking, and receive a finisher award.

Experience a weekend of multisport racing at McNear’s Beach Park featuring an Olympic triathlon, a trail half marathon, and a combined challenge for participants seeking dual events in San Rafael.

Trail runs near Bear Valley and Lake Spaulding with a 50K and a 24 mile option. The 50K includes a summit loop with about 5,700 ft of gain, rocky sections on Signal Peak OHV Road, cupless aid stations, and finisher medals.

Kokanee Trail Runs on October 4, 2026 in South Lake Tahoe features a 1/2 Marathon, 10K, 5K and a half mile Tadpole Trot with scenic lake and mountain courses, aid stations, sustainable event shirts, and local charity support.

Trail races in Auburn, California along the American River Canyon rim with live music and free cider. Distances include a 50K, a half marathon and a 5 mile course with aid stations on the longer routes.

Granite Head Trails & Ales Trail Races feature 6.6-mile and 11.2-mile courses. Runners get a tech T-shirt and can enjoy post-race fajitas and a beer. The event is the final race in a local trail running series.

A 12.4 mile loop up to the Mount Diablo summit and back with about 4,000 feet of climbing and descending. The race starts and finishes at Mitchell Canyon and includes shuttle service, a post race raffle and a finisher item.

Trail races around the San Pablo and Briones Reservoirs in the East Bay offering 35K, half marathon, 10K and 5K on single track and fire roads. Aid stations, limited field size, parking at the visitors center, and volunteer support.

A fatass trail run in Foresthill, CA offering 25 mile and 50 mile courses along the North Fork of the American River. Entry is free and field size is limited to 50 runners, with off trail sections and significant elevation gain.

Trail races in Nevada City on October 11 2026 include a 13.1 miles half marathon, a 10K and a 5K with mixed terrain, aid stations and views along Deer Creek. Organized by Sierra TrailBlazers and Bear Yuba Land Trust.