Running: Half Marathon, 10K, 5K Trail Run
Castro Valley, California
January 1st, 2024 
17600 Lake Chabot Rd, Castro Valley, CA
The Brazen New Year's Day Half Marathon is a Running race in Castro Valley, California consisting of a Half Marathon and 10K and 5K Trail Run.
Where should you be? Pounding the trails of Lake Chabot, of course!
Join us at Lake Chabot in Castro Valley for the scenic and invigorating 5K, 10K or half marathon. All courses include rolling, but mostly very runnable hills. Because there is always a chance of rain before and (hopefully not) during the race, the courses chosen are generally wet weather friendly. This means the 5K will be entirely on paved trails around the lake. The 10K course is roughly 50% on paved trails and 50% on dirt trails. The half marathon is approximately 30% on paved trails 70% on dirt trails.
So whether you are an experienced trail
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