Cull Canyon Regional Recreation Area is a regional park located in Castro Valley, Alameda County, California. It is part of the East Bay Regional Park District system.Aquatic facilitiesCCRRA includes a fishing lake and a separate 1.5acre swim lagoon that resulted from damming San Lorenzo Creek. The swim area has a bathhouse, lawns, sandy beaches, and lots of shallow water for kids. EBRPD reports that "The lagoon won the 1966 Governor's Design Award for Exceptional Distinction for Recreational Development in the category of landscape." The recreation area is open for swimming seasonally. The swim area is fenced and has a lifeguard on duty when the area is open. No dogs are allowed inside this area.Reservoir sedimentation issueIn 2014, the San Jose Mercury-News, a local newspaper, reported that the Cull Creek Reservoir Dam would likely be drained soon because it had been judged as seismically unsafe. This hazard was caused by tons of sediment that had deposited since the dam was constructed in 1963.
