There are about 30 known springs, including Tarpon Hole and Hunter Spring, that either issue from the bottom of Kings Bay or flow into the bay from side creeks. Their combined flow feeds Crystal River, which flows approximately 7 miles (11.3 km) northwest to the Gulf of Mexico. Surrounding land is coastal lowlands with brackish marsh and hardwood-palm hammock to the west and the City of Crystal River to the east. The whole system is tidally influenced, and Kings Bay is brackish.
All of Kings Bay and most of its springs are used for swimming, manatee observation, pleasure boating, and scuba diving. The west side of Kings Bay and some islands are part of the Crystal River National Wildlife Refuge. The city of Crystal River nearly adjoins the east side of Kings Bay.
The Kings Bay Springs Group is located in Kings Bay west of Crystal River. Coming into Crystal River from the north on US 19/98, King's Bay can be accessed via numerous boat landings north and south of the Bay.