Brazen New Year's Day

Castro Valley, United States • 1 Jan 2026

Brazen New Year's Day is an annual running event held at Lake Chabot in Castro Valley, California. It offers a scenic and challenging course with three distance options: a half marathon, 10K, and 5K. The race takes place on January 1st, providing a festive and invigorating way to start the new year.

Participants can also earn a special New Year Mega Medal by running both the Brazen New Year's Eve race and this event. The half marathon is part of the Brazen Ultra Half Series, known for its tough trails and significant elevation changes. The event is family-friendly and supported by volunteer photographers and sponsors. Visit the organization's website for the most recent information.

Race information

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