Enjoy a fast and scenic tour of the East Bay's beloved regional parks at the Chabot/Redtail Ridge Trail Run, February 21, 2026. This classic Northern California event offers five distances, from a 50k to a 5k, on a beautiful network of trails around Lake Chabot featuring eucalyptus forests, grassy meadows, and stunning lake vistas. Known as one of the faster courses on the Inside Trail Racing calendar with less elevation and some paved sections, it's the perfect opportunity for seasoned runners to chase a PR or for newcomers to experience a well-supported and accessible trail race.
Organized with professional precision, the race features fully stocked aid stations with Skratch Labs hydration, high-quality tech shirts for early registrants, and a festive atmosphere with custom medals and pint glasses for 50k finishers. With a generous 8.5-hour cutoff for the 50k and a capacity of 500 runners across all distances, the event strikes a perfect balance between competitive energy and a welcoming community vibe. Secure your spot early for a quintessential Bay Area trail running experience.
Feb 21, 2026
Distance — 30K
Type — Running
08:30
$110.00
Feb 21, 2026
Distance — 50K
Type — Running
08:30
$135.00
Feb 21, 2026
Distance — 21.1K
Type — Running
08:45
$100.00
Feb 21, 2026
Distance — 10K
Type — Running
09:00
$85.00
Feb 21, 2026
Distance — 5K
Type — Running
09:15
$70.00
These values represent the 3-year monthly averages for February in Castro Valley.
Castro Valley is an unincorporated town in the inner East Bay in the Bay Area of California. It has a population of about 60,000 and is located north of Hayward and east of San Leandro and south of the Oakland hills. Since it is unincorporated, Castro Valley is governed by the County of Alameda, which has its county seat in Oakland.
Read more launchExplore other exciting events happening in this same region.
location_on Fremont, California, US
calendar_today Mar 15, 2026
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