ONLINE RACE REGISTRATION IS NOW CLOSED.  RACE DAY REGISTRATION WILL BE AVAILABLE, STARTING AT 7:00 AM

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 22nd 2017! 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!

Registration Fees

5K Closed

5K No shirt Closed

-$5.00

10K Closed

10K No shirt Closed

-$5.00

Half Marathon Closed

Half Marathon No shirt Closed

-$5.00

Remote Runner Closed

Remote Runner No shirt Closed

-$5.00

Event Schedule

  • July 22 7:30 AM PDT - Hiker start (for those walking the half marathon, planning to take longer than 3.5-4 hours)

  • July 22 8:30 AM PDT - Half Marathon

  • July 22 8:55 AM PDT - 10K

  • July 22 9:10 AM PDT - 5K

Contact Information

Event Location

Castro Valley, CA, United States

Click here to view map