The Rock the Loch 5K/10K/Half Marathon
Castro Valley, California, United States
Jun 28, 2026 - Sunday
5k, 10k, Half-marathon
Race Information
Rock the Loch features a flat, fast, paved 5K, a hybrid 10K (50% trail/50% road), and a half marathon with a nice mix of hills, trails, paved paths, and amazing views. No matter what distance you tackle, you get an awesome race woodallion, a lifestyle tee, post-race snacks, beverages, and beer!
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Run Pick of the Month - Bay to Breakers
Get ready to be part of history! Bay to Breakers isn't just a 12K; it's the oldest consecutively run annual footrace in the world, held in May 2026.
A legendary staple of the City by the Bay since May 1912, this race has been interwoven into the very fabric of San Francisco, creating a wild, beautiful, and unforgettable celebration of life, community, and pure, unadulterated fun.
The classic 12K is amazing, but if you're looking for an extra push, you're covered with the Breakers Bonus 3K. Turn your run into an epic 15K challenge and make your Bay to Breakers experience even bigger, bolder, and wilder.
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Race Facts
Race Size: 100 - 500
Elevation: Some Hills
Course Type: Trail
Boston Qualifier: No
Kids Run: No
Where to Stay
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