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 participants the choice of a half marathon, 10K, or 5K race, all set on scenic trails around the lake. The event is known for its invigorating course featuring challenging ascents and descents, making it part of the Brazen Ultra Half Series for half marathon runners seeking a tougher trail experience. The race fosters a family-friendly and festive atmosphere, encouraging runners to start the new year actively. Participants can also earn a special New Year Mega Medal by combining this race with the Brazen New Year's Eve event. 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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