Cull Canyon Regional Recreation Area in Castro Valley is a popular swimming spot for everyone. The pool was constructed alongside a damn for an indoor experience, and this renovation has made the pools self-sufficient, even in summer drawbacks. Alongside the hot swimming spot, Castro Valley has many parks and trails to venture, such as the Alameda Creek Trail that follows the Alameda Creek, the Anthony Chabot camp that offers hiking, riding, and bicycle trails, Antioch and Oakley Regional Shore...