Calvert Cliffs State Park is a day-use park featuring a sandy beach, unique fossils, recycled tire playground, fishing, a freshwater and tidal marshland and 13 miles of hiking trails located in Calvert County. History The massive cliffs, from which Calvert Cliffs State Park was named, dominate the shoreline of the Chesapeake Bay for roughly 24 miles in Calvert County and were formed over 10 to 20 million years ago when all of Southern Maryland was covered by a warm, shallow sea. When the sea receded the cliffs were exposed and began eroding. Today these cliffs reveal the remains of prehistoric species Including sharks, whales, rays, and seabirds that were the size of small airplanes. Approximately 550 acres are open to hunting for upland game, turkey and deer. Upland game species include squirrels and rabbits. Turkey hunting is permitted only during the spring gobbler season. Deer hunting is permitted during seasons established by the Wildlife and Heritage Division. All hunters must register at the hunter parking area. For information about hunting, visit The Maryland DNR Guide to Hunting and Trapping. Hunters may enter / remain on park property outside of the regular posted hours provided that they are engaged in legitimate, authorized hunting activity.