Sorry I havenít been around Ė damn real life got in the way.
It is Isthmus Cove, one of Two Harbors on Santa Catalina Island; obviously on a busy summer weekend. They use a double mooring system connected by a line (called a "spreader line " in the diagram but usually referred to as a "sand line") so the boats can be really packed in when itís busy. Catalina is the only place I have encountered this system.
All yours kwaltersmi.