Brazen New Year's Eve
Friday, January 1, 2027, first start 8:30 AM, in Castro Valley (17600 Lake Chabot Road). Distances: 5K, 10K, Half marathon. Entry from $68 to $100; the 5K goes from $68 to $73 after October 25.
- Date
- Friday, January 1, 2027
- Start time
- 8:30 AM (earliest wave)
- Location
- 17600 Lake Chabot Road, Castro Valley, CA 94546
- Area
- East Bay, SF Bay Area
- Distances
- 5K10KHalf marathon
- Course
- Trail (dirt or single-track on at least part of the course)
- Price
- $68 to $100 plus the platform's processing fee
- Next price increase
- Sunday, October 25, 2026: 5K $68 → $73
- Registration
- Open. Opened January 18, online signup closes Saturday, January 2, 2027
How to register
Registration is on RunSignup. Pick your distance, add any extras, and you'll get a confirmation email with your bib details. Sign up by October 25 to pay $68 instead of $73.
Register on RunSignup →Race website
Course and race notes
Whether you're looking to squeeze in your first trail run or you're looking to log that 1,000th mile before the clock strikes midnight on 12/31/2026, this is your chance. Note: This year we will have back-to-back events at Lake Chabot, Castro Valley with a 5K, 10K and half marathon!
From the race's own listing. Check the race website for the course map and parking.
Source: RunSignup public race API, refreshed 2026-10-17. Details can change; the registration page is the final word.