Though not a park, the fish are fairly tame at Black Rock. This makes for a pleasant snorkel or dive. With the shallow depth, a long bottom time can be acheived, unfortunately the reef is not extensive. Sometimes this makes the dive seem short, but it is really about a 30 to 40 minute dive. It can be such a relaxing dive, time seems to pass quickly.
Night dives are especially nice here.
Entry and exit are easy, but finding a parking spot can be a real problem. There are lots of fish and the water is usually pretty clear. Often turtles can be seen on the cliff side of the rocks. Facilities are excellent at Black Rock. There are, rest rooms, restaurants, showers, equipment rentals , etc.