Guana Island

The Guana, Tolomato and Matanzas Rivers are part of the Florida Upper East Coast Drainage Basin and form a system of “bar bounded” estuarine lagoons westward of the coastal barrier islands of St. Johns County and north Flagler County. Both the St. Augustine and Matanzas Inlets provide tidal exchange with the Atlantic Ocean. The Atlantic Intracoastal Waterway is a maintained inland navigation route through the Matanzas and Tolomato Rivers. Canals dug when this waterway was originally constructed early in the last century link the Tolomato River to the St. Johns River northward, and the Matanzas River to the Halifax River southward.