Trail Running calendar near Oakland 2025-2026

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.

Run Diablo State Park on September 6 for scenic single track and dirt road trails with distances from 4 miles to 50K, plus a kids dash. Big climbs, frequent aid stations and sweeping views make this a must for trail runners seeking a challe..

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..

Join the 39th Ruth Anderson Memorial Endurance Run in San Francisco on October 10, 2026. Run scenic loops around Lake Merced on a certified course with 50k and 50 mile options and aid stations for a memorable autumn ultramarathon.