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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 28th 2018! 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

    1. $46.00
      Aug 17 - Jun 3
    2. $51.00
      Jun 4 - Jul 1
    3. $56.00
      Jul 2 - Jul 27

5K No shirt Closed

-$5.00

    1. $41.00
      Aug 17 - Jun 3
    2. $46.00
      Jun 4 - Jul 1
    3. $51.00
      Jul 2 - Jul 27

10K Closed

    1. $55.00
      Aug 17 - Jun 3
    2. $60.00
      Jun 4 - Jul 1
    3. $65.00
      Jul 2 - Jul 27

10K No shirt Closed

-$5.00

    1. $50.00
      Aug 17 - Jun 3
    2. $55.00
      Jun 4 - Jul 1
    3. $60.00
      Jul 2 - Jul 27

Half Marathon Closed

    1. $71.00
      Aug 17 - Jun 3
    2. $76.00
      Jun 4 - Jul 2
    3. $81.00
      Jul 3 - Jul 27

Half Marathon No shirt Closed

-$5.00

    1. $66.00
      Aug 17 - Jun 3
    2. $71.00
      Jun 4 - Jul 2
    3. $76.00
      Jul 3 - Jul 27

Remote Runner Closed

    1. $40.00
      Aug 17 - Jul 1
    2. $45.00
      Jul 2 - Jul 27

Remote Runner No shirt Closed

-$5.00

    1. $35.00
      Aug 17 - Jul 1
    2. $40.00
      Jul 2 - Jul 27

Event Schedule

  • July 28 7:30 AM PDT - Hiker start (for those walking the half marathon, planning to take longer than 3.5-4 hours)

  • July 28 8:30 AM PDT - Half Marathon

  • July 28 8:55 AM PDT - 10K

  • July 28 9:10 AM PDT - 5K

Contact Information

Event Location

Castro Valley, CA, United States

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