Trail Running calendar near Walnut Creek 2026-2027

Run scenic trails at Lake Chabot on June 7, 2026 in a chip timed half marathon or 5K with ridge top views of Mt Diablo and the Bay. Presented by Castro Valley Sports Foundation as a fundraiser with finisher medals.

Run the Bay Area 100 on June 13, 2026, a point to point 100 mile race from UC Berkeley to Skyline High in Oakland. Enjoy epic East Bay ridge and redwood scenery with about 18,000 ft of climbing and a 33 hour cutoff.

Enjoy coastal redwoods and river crossings in Santa Cruz at the San Lorenzo River Trail Run, with distances from 10K to 50K and a free kids run. Pre registered runners get shirts and all finishers earn custom medals.

Run a scenic loop from Lake Chabot Marina through East Bay Regional Parks with 50K and half marathon options. Enjoy staffed aid stations, race shirt, Skyline socks and a finisher medal on this well supported trail event.

Run among towering redwoods in Oakland with distances from 5 mile to 50K and a kids dash. Free parking, pre registered runners get a shirt and all finishers receive a medal; aid stations support the longer routes.

Run through towering redwoods on scenic single track trails at SPASM Crystal Springs Trail Run in Woodside, with distances from 8K to 50K and a kids dash. Stocked aid stations, finisher medals and shirts for early registrants.

Diablo Trail Run on Sunday, September 6, 2026 in Clayton CA offers distances from a flat 4 mile to a challenging 50K with sweeping Bay Area views. Marked courses, stocked aid stations and finisher medals welcome all levels.

Run the Gold Rush Growler Trail Runs on September 19, 2026 at Granite Beach for scenic shoreline and single track trails with 5K and 10 mile options. Finishers receive a commemorative beer glass and ages 21 and up can enjoy a local IPA at t..

Autumn trail festival at Lake Chabot Marina in Castro Valley offering 100k, 50 mile and marathon distances through classic East Bay parkland. Expect challenging terrain, a friendly community vibe, and generous finisher swag for all distance..

Run by the Sea returns Sunday, October 4, 2026 at Wilder Ranch State Park in Santa Cruz with 4K, 12K and a half marathon on scenic coastal trails. Now in its 101st year, this charity race supports local youth and trail groups.

Run the 39th Ruth Anderson Memorial Endurance Run on October 10, 2026 in San Francisco. Choose 100 km, 50 miles, or 50 km on a scenic paved loop around Lake Merced with chip timing and certified 50K and 50 mile courses.

Run through oak forests, granite boulders and fall foliage along scenic trails by Folsom Lake at Granite Head Trails and Ales. Pick 6.6 or 11.45 mile courses and celebrate with a finisher medal, tech shirt, beer and fajitas.

Experience the Sonoma Fall Classic in Healdsburg wine country where ultrarunning tradition meets festival fun. Choose marathon, Lake Sonoma 50 Mile, ultramarathon and relay options and celebrate trails, community and harvest.

Join ZombieRunner Halloween at Hellyer County Park in San Jose on Oct 31 for races from kids dashes to a USATF certified half and marathon. Scenic Coyote Creek trails, festive costumes, shirts and finisher medals make it a fun holiday run.

Celebrate the 25th Rio Del Lago with a rugged 100 mile loop around Folsom Lake or a spirited 50K on scenic single track and river trails. Expect big climbs, iconic views and well stocked aid stations.

Enjoy a scenic but hilly trail run at Huddart Park with distances from 3 mile to half marathon, plus a 6 hour challenge and youth dash. Stay for pancakes after the race and choose a virtual option for 5K, 10K or half marathon.