In 175 days · Thu, Dec 31, 2026
Don't let race day sneak up
One email during race week. That's it.
Thursday, December 31st, 2026
17930 Lake Chabot Rd, Castro Valley CA
Half · 5K · 10K
About this race
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.
Train with a club
Run clubs near Castro Valley to train with before race day.
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