Redtail Ridge

Bad Bass at Lake Chabot Marina in Castro Valley on July 18, 2026 features a paved 5K, a mixed-surface 10K and a mostly fire-trail half marathon with marked routes and stocked aid stations.

Trail endurance races at Point Pinole Regional Shoreline offering 12 hour, 6 hour and 3 hour options for individuals or teams of two or three. The 3.37 mile loop runs mostly on dirt fire trails with shoreline views and eucalyptus groves.

Trail running at Calero County Park with multiple distances across single track and dirt paths, significant climbs, aid stations and free parking at the park.

A trail race in the Marin Headlands with 8K, half, 30K and 50K options along coastal single-track and fire roads, marked courses, cupless aid stations, and a 350 runner capacity.