Bad Bass
Saturday, July 24, 2027, first start 7:30 AM, in Castro Valley (17600 Lake Chabot Road). Distances: 5K, 10K, Half marathon. Entry from $63 to $100.
- Date
- Saturday, July 24, 2027
- Start time
- 7:30 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
- $63 to $100 plus the platform's processing fee
- Next price increase
- None published
- Registration
- Open. Opened October 17, online signup closes Saturday, July 24, 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.
Course and race notes
Rising up from the depths of Lake Chabot, the Bad Bass (a strangely kilt-wearing, bagpipe-playing Scottish bass with teeth) shows itself once again on July 24th 2027! Why is he Scottish? What is he doing in Castro Valley? How can he play bagpipes with his fin? We have no idea how to answer those questions.
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.