Brazen New Year's Eve

DEC
31
2026
Trail races at Lake Chabot in Castro Valley on December 31, 2026 offering half marathon, 10K and 5K; hikers and walkers welcome.
Thu 31 Dec 2026
Half Marathon 10 kilometers 5 kilometers

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Brazen New Year's Eve at Lake Chabot

The event is a trail race held at Lake Chabot in Castro Valley, California on December 31, 2026. The course uses the park trails and is organized by Brazen Racing.

Distances offered:

  • Half marathon
  • 10K
  • 5K

Hikers and walkers are explicitly welcome to participate. Results are posted after the race for participants to view. Free race photos are provided by volunteer photographers.

There are volunteer roles for the event, and volunteers support tasks such as photography and on-course assistance. Sponsors noted for the event include GU, Bodyfit, and CallJazz; sponsor contributions are described as helping to reduce entry costs and support services for participants.

The event is linked to an adjacent New Year race the following day. Participants have the option to complete a second half marathon on January 1 to earn an event Mega-Medal or to record two half marathons as a marathon distance across the two days. The race page includes additional race information, course details, directions, and frequently asked questions. Visit the organization's website for the most recent information.

Events nearby

A fundraiser in Joaquin Miller Park featuring a 5 km trail race and a 1 mile fun run to support Oakland Tech PTSA and student programs.
Trail and running events around Lake Chabot reservoir in Castro Valley, with distances from a 50 yard kids dash up to a 50K.
Experience a flat and fast trail race through the scenic Quarry Lakes Regional Recreation Area in Fremont. Choose from a USATF certified half marathon, 10K, or 5K while enjoying views along the Alameda Creek Trail.
Nomadic Adventure Club's 11th annual 5K trail run at Arbolado Park in Walnut Creek with family activities and Mongolian food after the event.
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