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.