Bad Bass

Saturday, July 18, 2026 • Castro Valley, CA
Registration Open Closing Soon
Register Now — From $100.00

When is Bad Bass?

Bad Bass takes place on Saturday, July 18, 2026 in Castro Valley, CA.

What distances does Bad Bass offer?

Bad Bass offers 4 events: 5K, 10K, Remote Runner, HALF MARATHON.

Event Distance Price
5K 3.35 mi $68.00 Register
10K 6.4 mi $77.00 Register
Remote Runner 13.1 mi $55.00 Register
HALF MARATHON 13.2 mi $95.00 Register

How much does Bad Bass cost?

Registration for Bad Bass starts at $100.00. Prices vary by event distance.

Where is Bad Bass held?

Bad Bass is held in Castro Valley, CA at 17600 Lake Chabot Road.

About Bad Bass

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!

Register Now — From $100.00

Swag & Giveaways

5K: Race Shirt
10K: Race Shirt
Remote Runner: Race Shirt
HALF MARATHON: Half Marathon Shirt
Register for Bad Bass
From $100.00 Closing Soon
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