Bad Bass - Castro Valley
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Event Overview
The Bad Bass event is a trail running race held at Lake Chabot Marina in Castro Valley, California. The event uses a thematic character described as a "kilt-wearing, bagpipe-playing Scottish bass" as its mascot.
Distances
The event offers three trail race distances:
- Half Marathon
- 10K
- 5K
A "Remote Runner" virtual participation option is also available.
Event Date and Location
The event takes place on July 18, 2026. The start and finish area is at the Lake Chabot Marina.
Registration
Registration is tiered, with prices increasing as the event date approaches. The listed starting prices are $69.50 for the 5K, $79.11 for the 10K, and $100.46 for the Half Marathon. A separate, earlier "Hiker start" is offered for participants walking the half marathon who anticipate taking longer than 3.5 to 4 hours.
Additional Information
The event supports the East Bay Regional Parks Campership Program through fundraising. Visit the organization's website for the most recent information.
