Brazen New Year's Eve
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.
Join fellow runners on January 1, 2027 for the Brazen New Year's Eve. It's a fantastic 5K, 10K, Half-Marathon, NYE REMOTE RUNNER featuring a flat and fast course in Castro Valley.
Pick your distance
Running
NYE 5K
The 5K is entirely on paved trails. The 5K and 10K will essentially be out and back courses, while the half marathon will basically be a loop. All courses include rolling hills that are mostly runnable.
NYE 10K
The 10K is about 50% paved trails and 50% dirt trails. The 5K and 10K will essentially be out and back courses, while the half marathon will basically be a loop. All courses include rolling hills that are mostly runnable.
NYE HALF MARATHON
The half marathon is approximately 30% paved trails and 70% dirt trails. The 5K and 10K will essentially be out and back courses, while the half marathon will basically be a loop. All courses include rolling hills that are mostly runnable. The half marathon will start at 8:30 am and the course will have a time limit of 4.5 hours. All half marathoners must reach the aid station at mile 10.7 by 11:45 am.
NYE REMOTE RUNNER
About Castro Valley
Brazen New Year's Eve takes place in Castro Valley, California, United States. The local timezone is America/Los_Angeles.
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🏃 Plan Your Next Race in Castro Valley
Find upcoming events by distance:
- Castro Valley 5K Races Best Castro Valley routes for beginners and speed work.
- 10K Run Events in Castro Valley The most popular local distance in California.
- Castro Valley Half Marathons Top-rated 21.1K courses in the Castro Valley area.
- Marathons in Castro Valley Scenic 42.2K routes and Castro Valley Boston qualifiers.
- Castro Valley Running Calendar 2026 See all upcoming race dates.
Race information has been sourced from the event's official website and other publicly available resources. For the most up-to-date details, please refer to the official website directly. If you notice any incorrect or missing information, don't hesitate to reach out to us by email.
