Brazen New Year's Eve

Castro Valley, United States • 27 Dec 2025

The Brazen New Year's Eve event, held at Lake Chabot in Castro Valley, California, offers runners and walkers the opportunity to participate in a half marathon, 10K, and 5K trail races. This festive race encourages participants to close out the year with a scenic run on beautiful trails, welcoming all levels from first-time trail runners to seasoned athletes. The event promotes a fun and supportive atmosphere, with options to extend the celebration by joining the New Year's Day race to earn a special Brazen New Year Mega-Medal. It also features a unique "Brazen New Year Marathon" challenge, combining two half marathons across the holiday period. Visit the organization's website for the most recent information.

Race information

13 mi
Half Marathon
10 km
10k
5 km
Visit the organization's website for the most recent information.
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