Brazen New Year’s Eve Half Marathon/10K/5K


Dec 31, 2021 at 7:30 AM

Brazen New Year’s Eve Half Marathon/10K/5K

17936 Lake Chabot Rd

Castro Valley CA, 94546


Entry Fee $40
(Lowest or Early Registration)

Entry Fee 2 $100
(Highest or Late Registration)

Prize Money: no


  • 10K
  • 13.1M
  • 5K

Type: Trail

Percent of the course on un-paved trails: 95%

First Year of the Event: 2011

Men's Record: Half: Anthony Cortes 1:15.57 (2016)

Women's Record: Half: Joanna Reyes 1:20.21 (2018)


Whether you are looking to squeeze in your first trail run or you’re looking to log that 1,000th mile before the clock strikes midnight on 12/31/2021, this is your chance!

And if that’s not enough New Year running for you, join us at Lake Chabot on New Year’s Day, do it again and earn the Brazen New Year Mega-Medal! Learn about the New Year’s Day race at our website.

For the more adventurous, you can run the “Brazen New Year Marathon” (= two half marathons, one on 12/31 and one on 1/1) and then brag to your friends: “It took me two years to finish that marathon!”


No photos available.


Past Event Dates

Held on Dec 31, 2021

Held on Dec 28, 2019

Held on Dec 30, 2018

Held on Dec 31, 2017

Held on Dec 31, 2016

Held on Dec 27, 2015

Held on Dec 28, 2014

Held on Dec 28, 2013