The Saint Johns River, located in Florida, is one of the state's most significant water bodies. With a total length of 310 miles (and an impressive width of up to 3 miles in certain areas), the river continues to play a vital role in the lives of those living nearby. The river is also known by several names, including San Juan (the Spanish version of its name), the Saint John's River, and St. Johns River. Some locals may even refer to it as simply "The River." Whatever name you use, it's clear that the Saint Johns River is an integral part of Florida's natural landscape.