Whether you're looking to squeeze in your first trail run or you're looking to log that 1,000th mile before the clock strikes midnight on 12/31/2026, this is your chance.

Note: This year we will have back-to-back events at Lake Chabot, Castro Valley with a 5K, 10K and half marathon!

New Year's Eve, Thursday, 12/31/2026

New Year's Day, Friday, 1/1/2027*

Make it a double and join us both days and earn the Brazen New Year Mega-Medal!

*Note: Each race is a unique event on its own and requires separate registration.

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Distances

5K

10K

Half marathon