Cape Sable, Florida

Cape Sable, Florida, is the southernmost point of the US mainland and mainland Florida. It is located in southwestern Florida, in Monroe County, and is part of the Everglades National Park. The cape is a peninsula issuing from the southeastern part of the Florida mainland, running west and curving around to the north, reaching Ponce de Leon Bay, at the mouth of the Shark River. It forms the southern and western margins of Whitewater Bay. There are three prominent points on the cape, East Cape, which is the actual southernmost point of the Florida and United States mainland and the location of Lake Ingraham, the southernmost lake in the United States of America, Middle Cape, also known as Palm Point, and Northwest Cape. The cape has many lakes and beaches. It is home to the mangrove diamondback terrapin (Malaclemys terrapin rhizophorarum) and the Florida gopher tortoise (Gopherus polyphemus). Before Hurricane Donna (1960) reduced their range, more than 3,000 of the now-endangered Cape Sable seaside sparrows (Ammodramus maritimus mirabilis) used the cape.

Nearly the full length of the cape facing Florida Bay and the Gulf of Mexico is a fine sand beach extending inland less than 100 yards. Behind the beach in the eastern and middle parts of the cape is a marl prairie, extending from Flamingo to approximately Northwest Point. Inland from the marl prairie, and over all of the northern part of the cape behind the beaches, is a complex of marshes and mangrove covered land. The largest lake on the cape is Lake Ingraham, which is long and narrow, running just behind the beach from near East Cape to past Middle Cape.

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