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Chabot/Redtail Ridge Trail Run

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Castro Valley, California, United States

calendar_today 21 Feb, 2026

directions_run Running

sell $70.00 – $135.00

About the Event

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.

Races Offered

30K

Feb 21, 2026

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Distance — 30K

terrain

Type — Running

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08:30

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$110.00

50K

Feb 21, 2026

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Distance — 50K

terrain

Type — Running

timer

08:30

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$135.00

1/2 Marathon

Feb 21, 2026

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Distance — 21.1K

terrain

Type — Running

timer

08:45

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$100.00

10K

Feb 21, 2026

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Distance — 10K

terrain

Type — Running

timer

09:00

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$85.00

5K

Feb 21, 2026

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Distance — 5K

terrain

Type — Running

timer

09:15

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$70.00

Weather History

These values represent the 3-year monthly averages for February in Castro Valley.

thermostat Temperature

5.9° / 13.8°

wb_sunny Feels like

3.0° / 11.2°

light_mode Avg sunshine hours

7h 39m

water_drop Avg rainfall

5.8 mm

ac_unit Avg snowfall

—

air Avg wind speed

9.9 km/h (Light breeze)

opacity Sweat loss rate

Low

terrain Course conditions

Firm and slightly soft

sunny Max UV Index

Moderate (3.0)

humidity_mid Humidity

80.8%

wb_twilight Sunrise

07:56

nightlight Sunset

18:46

About Castro Valley

Learn more about the host city, 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.