The St. Johns River Basin is one of the most unique in the country and the largest in the State. It is one of the few rivers in the world that runs opposite of the equator. 310 miles of marsh and flowing water, the St. Johns bubbles up from South Florida to converge with the tributaries of the Econlockhatchee in rural Seminole County. The upper or Southern portion of the basin gives way to a more formal river that flows North through the lower basin eventually exiting to the Atlantic Ocean in Jacksonville. It is one of the most important and abused systems in Florida.