Trail Running calendar near Folsom 2026-2027

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 in South Lake Tahoe on October 4, 2026 offers a half marathon, 10K, 5K and a noncompetitive half mile for children, scenic lake and mountain courses, 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 from Mitchell Canyon to Mount Diablo summit with about 4,000 feet of ascent and descent. Entry includes shuttle service, a post race raffle entry, a finisher item, and a five hour cutoff.

Trail races around San Pablo and Briones Reservoirs on October 10, 2026, with 5K, 10K, half marathon and 35K options. The course features single-track and fire roads, aid stations with varied supplies, and awards for finishers.

Fatass style trail races of roughly 25 and 50 miles near Foresthill, CA, featuring off-trail route finding, significant elevation gain, limited to 50 entrants, and a shared drop bag location passed twice.

Trail races in Nevada City on October 11, 2026 feature a half marathon, 10K and 5K across mixed terrain with views along the Tribute Trail and Deer Creek. The half marathon crosses a historic swinging bridge and includes multiple aid statio..

Insomnia is a night trail race in the Sierra Nevada foothills offering 35K, 14K and 5K options. Courses are marked with reflective ribbons and headlamps are required; the 35K has a 5 hour 30 minute overall cutoff.

Trail running in Cool, California with 5k, 10k and half marathon options on Sierra Foothills trails. Proceeds support Georgetown Divide Ready by 21 and a Camp Taylor scholarship; family packages, childcare, and a post-race breakfast are inc..

Run through the historic site of the 1848 gold discovery in California. This event features multiple trail distances from a 5K to a Half Marathon on scenic singletrack paths along the American River.

A trail running event at Mount Diablo in Walnut Creek on October 17, 2026 offering 30K, Half Marathon, 10K and 5K courses on hilly trails where mud and creek crossings are possible.

A 5k cross country race run in two loops around Willow Hill Reservoir next to Folsom High School, part of the Pacific Association USATF Cross Country Grand Prix, with a $75 bonus for breaking an age group record.

A themed charity run and community festival on October 18, 2026 in Downtown Roseville, CA, supporting the bleeding disorders community. The day includes a timed 5K, a one mile walk, festival food, carnival games, and a remembrance ceremony.

An endurance event at Beals Point, Granite Bay featuring hourly 4.16 mile laps until one runner remains, plus a 12 hour Mini Last Person Standing option. Aid is available at the start area and runners may set personal aid stations.

A backyard ultra at Beals Point in Granite Bay where runners run a 4.16 mile loop each hour until one remains. A 12 hour Mini format offers the same hourly lap with a fixed limit.

A remote, informal backcountry foot run at Oxbow Reservoir, CA offering three route options with substantial elevation gain and multiple water crossings. Registration closes Oct 22 at 11:59 PM PT.

Experience the autumn scenery of Jenkinson Lake at the Trail Run at Sly Park. This event offers distances from a 5K to a 50K ultra on shaded pine forest trails with rolling hills and lakeside views.

A trail event at Acorn Creek Trailhead near Pilot Hill, CA featuring a 10K single lap and a two-lap half marathon across singletrack, creek crossings, and overlooks. The race is limited to 175 runners and benefits the American River Conserv..

Trail marathon, half marathon, 10K and 5K at Bothe-Napa Valley State Park on October 24, 2026. The single track course features hills, streams and rocks, is marked with orange ribbon, has limited entry and specific cutoff times.