Brazen New Year's Eve

DEC
31
2026
Trail races at Lake Chabot in Castro Valley on December 31, 2026 include a half marathon, a 10K and a 5K. Hikers and walkers are welcome and runners can repeat the course on January 1 to earn the mega medal or combine both halves for a full marathon.
Thu 31 Dec 2026
Half Marathon 10 kilometers 5 kilometers

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Brazen New Year's Eve

Brazen New Year's Eve is a trail running event organized by Brazen Racing at Lake Chabot in Castro Valley, California, on December 31, 2026. The event includes multiple distance options and welcomes hikers and walkers on the course.

Distances offered:

  • Half marathon
  • 10K
  • 5K

The event page includes information about the course, bib pickup, shirts and awards, start times, directions, and volunteer opportunities. Free photos are provided by volunteer photographers, and race results are posted after the event. Sponsors are listed as contributors to the event.

Participants have the option to run a complementary event the next day to earn the Brazen New Year Mega Medal. It is also possible to complete two half marathons, one on December 31 and one on January 1, which the organizer refers to as the Brazen New Year Marathon.

The presentation on race material is factual and logistical. Registration and entry procedures, volunteer roles, and specific course details are provided by the organizer through the event information resources. Visit the organization's website for the most recent information.

Half Marathon
Half Marathon
10 km
10k
5 km
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