Brazen New Year's Day Runs (5K, 10K, Half Marathon)

2027-01-01 — Castro Valley, CA. ﻿ A trail running event hosted by Brazen Racing to kick off the new year. Participants can choose between a 5K, 10K, or Half Marathon course winding through scenic dirt trails and paved paths around Lake Chabot. If you also complete their New Year's Eve race the day before, you get a special "New Year Mega-Medal."