Lake Washington stands as the largest lake in Brevard County, covering approximately 4,400 acres with an average depth around 10 feet. Located in Melbourne, this expansive body of water serves as a crucial component of the St. Johns River system, marking the first large lake in this important waterway. The lake's tannin-stained waters create ideal habitat for diverse fish populations, while its connection to the St. Johns River provides access to both lake and river fishing opportunities. The conservation area includes Lake Washington along with neighboring lakes Winder and Poinsett, forming part of the Upper St. Johns River Basin Project, a collaborative flood control and habitat revitalization effort between the St. Johns River Water Management District and the U.S. Army Corps of Engineers.