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

ATRA race member

20221223
2025-12-27

Dec 27, 2025 at 7:30 AM

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

17936 Lake Chabot Rd

Castro Valley CA, 94546

USA

Entry Fee $74
(Lowest or Early Registration)

Entry Fee 2 $114
(Highest or Late Registration)

Prize Money: no

Distance(s):

  • 10K
  • 13.1M
  • 5K

Type: Trail

Percent of the course on un-paved trails: 75%

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)

Description:

The 5K is entirely on paved trails. The 10K is about 50% paved trails and 50% dirt trails. 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.

Courses are subject to change due to weather, park requirements, etc.

 

For half marathon participants who wish to hike the course and take more than 4.5 hours, we will offer a “Hiker Division” start at 7:30 am. Those starting at 7:30 should carry water as the first and second aid stations might not be 100% up and running, depending on the hikers speed. Hiker starts will not be eligible to win the race or for age group awards, but will be listed as official finishers in the Hiker Division and will still receive finisher medals.

Photos

No photos available.

Map

Past Event Dates

Held on Dec 27, 2025

Held on Dec 28, 2024

Held on Dec 31, 2023

Held on Dec 31, 2023

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