Bad Bass Half Marathon, 10k & 5k
Castro Valley, California, United States
Jul, 2027 (TBD)
5k, 10k, Half-marathon
Race Information
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 -- even if he's a little late! 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 in at the beautiful Lake Chabot Marina in Castro Valley for the scenic Bad Bass 5K, 10K or Half Marathon!
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👍 Run Pick of the Month: Golden Gate Half Marathon
📍San Francisco - Sunday November 1, 2026
😄 Why We Like This Run
✅ The ultimate bucket-list experience
✅ Be part of an amazing community
✅ A distance for everyone
Join the 24th annual #RunTheBridge, a beloved San Francisco tradition that brings together runners of all levels for a world-class weekend. Whether you take on the 13.1-mile half marathon or the scenic 5K, you'll experience an incredible, high-energy atmosphere in the heart of the city.
The course offers a unique tour of San Francisco, blending urban charm with stunning waterfront paths. Most importantly, you’ll cross the iconic Golden Gate Bridge twice, treating you to uninterrupted, sweeping views of the skyline and the bay for an unforgettable journey across a world-famous landmark.
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Race Facts
Race Size: 100 - 500
Elevation: Fast and Flat
Course Type: Trail
Boston Qualifier: No
Kids Run: No
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