USARunningTrail10K · 10 km / 6.2 mi5K · 5 km / 3.1 miHalf · 21.1 km / 13.1 mi

Brazen New Year’s Day

Castro Valley, California, Lake Chabot · USA

Next race day

Fri, 1 Jan 2027

3 distances · see start times below

About Brazen New Year’s Day

Brazen New Year’s Day is a running event in Castro Valley, California, Lake Chabot, United States. Recorded disciplines include 10K, 5K, half marathon. The listed surface is trail. The listed organiser is Brazen Racing. The next listed date is 1 January 2027. Check the organiser's information for entry and race-day arrangements.

Dates, starts & entry

Times are local to the race. Select the entry route for your distance.

Half · 21.1 km / 13.1 mi
Fri, 1 Jan 2027
Start time not yet confirmed
Date TBC
Check race website
2027 race date and distance confirmed from the organiser programme, checked 14 October 2026. Entry availability is not confirmed by this listing; check the organiser website. The TBC status refers to entry availability, not the published race date. Distances are advertised race categories; the organiser notes that Ultra Half Series trail courses can exceed the nominal half-marathon distance. Check the current course map before entering.
Edition source
10K · 10 km / 6.2 mi
Fri, 1 Jan 2027
Start time not yet confirmed
Date TBC
Check race website
2027 race date and distance confirmed from the organiser programme, checked 14 October 2026. Entry availability is not confirmed by this listing; check the organiser website. The TBC status refers to entry availability, not the published race date. Distances are advertised race categories; the organiser notes that Ultra Half Series trail courses can exceed the nominal half-marathon distance. Check the current course map before entering.
Edition source
5K · 5 km / 3.1 mi
Fri, 1 Jan 2027
Start time not yet confirmed
Date TBC
Check race website
2027 race date and distance confirmed from the organiser programme, checked 14 October 2026. Entry availability is not confirmed by this listing; check the organiser website. The TBC status refers to entry availability, not the published race date. Distances are advertised race categories; the organiser notes that Ultra Half Series trail courses can exceed the nominal half-marathon distance. Check the current course map before entering.
Edition source