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Brazen New Year's Eve Castro Valley, California, United States
Event description
Brazen New Year's Eve is a trail race at Lake Chabot Regional Park in Castro Valley on Thursday, December 31, 2026, with a half marathon, 10K and 5K. The half marathon is part of the Brazen Ultra Half Series. Runners who also run the Brazen New Year's Day race the next day earn the Brazen New Year Mega-Medal, and those who run both half marathons complete the "Brazen New Year Marathon".
Course maps
Foot race
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31 Dec 2026
13.2 mi
Distance
Run the Half Marathon
Thu 31 Dec 2026
·
58 days to go
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Event homepageEvent history
Race data contributors
Nick Knipe