ROCK THE LOCH!

CATCH A BAD BASS PERSONAL RECORD!

ULTRA HALF RUNNERS: THE PIPER IS CALLING!

The Bad Bass is Back!

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! 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!

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July 28, 2018 (THE CLOCH IS TICKING)

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RACE DETAILS

RACE INFO

Everything you need to know.

COURSE

Three emerald courses await you.

FAQ

Frequently asked questions.

RESULTS

Check out your race standing and finishing time here.

RACE PHOTOS

Provided for free by our volunteer photographers.

VOLUNTEER

Help your family and friends by volunteering!

JOIN US AT THE LOCH

Brazen Ultra Half Series Races

All half marathon runners are invited to participate in the Brazen Ultra Half Series.

The series consists of our toughest half marathons. Most measure at least a little (and sometime more than just a little) longer than 13.1 miles. What really makes them "ultra", however is the serious ascents and descents and variety of tough trails you have to run to finish them. While flat half marathons are always a challenge, these "ultra-half-marathons" take it to another level!

BAD BASS SPONSORS

Thank you to our race sponsors, through their contributions, our sponsors help keep entry costs down and expose our runners their outstanding products and services. Learn more about becoming a sponsor.

There is something about the ritual of the race, putting on the number, lining up, being timed, that brings out the best in us.
Grete Waitz