About This Race
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 18th 2026! 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. Why is he so bad-to-the-fishbone? Maybe he just knows how awesome the trails of Lake Chabot really are!
Whatever the Bad Bass is doing here, we hope you'll join us at the beautiful Lake Chabot Marina in Castro Valley for the scenic Bad Bass 5K, 10K or Half Marathon!
Course & Race Day Details
Help Build Castro Valley's RaceMob Community
Your contributions help thousands of runners. Add what you know!
Write First Review
Share your experience
Add Runner Tips
Course strategy & advice
Share Discounts
Help runners save money
Create a Team
Coordinate your crew
Be the First! No content yet for this race.
Add photos, reviews, or tips to help other runners.
Race Photos
No Photos Yet
Be the first to share photos from this race!