Trail Running calendar near Duncans Mills 2025-2026

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 the Redwood Summer Trail Run in Oakland on August 15, 2026, with distances from a kids dash to a rugged 50K through scenic Redwood Regional Park. Pre registered runners get a tee and all finishers receive a custom medal.

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..

Run through ancient redwoods on a rugged 6 mile loop with log and stream crossings in Mendocino Woodlands Park. Choose 12 hour, 6 hour, half marathon or 10K formats and make a weekend of it with on site camping, yoga and meal passes.

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.