The Rock The Loch Half Marathon
Castro Valley, United States • 27-30 Jun 2025
The Rock the Loch Half Marathon is a scenic trail running event held at Lake Chabot Regional Park in Castro Valley, California. Scheduled for late June 2025, it offers live and virtual participation options across three distances: 5K, 10K, and half marathon. The 5K is fully paved, ideal for beginners or fast runners, while the 10K combines paved and trail sections with a challenging climb. The half marathon features mostly trail terrain with nearly 1,700 feet of elevation change, suited for experienced trail runners. Participants enjoy aid stations with hydration and snacks, race swag including a custom shirt, handcrafted woodallion, and a beer sampler stein, plus post-race refreshments and a brewfest with music by DJ Cryptid. Visit the organization's website for the most recent information.