Mason Neck State Park is located in Fairfax County, Virginia. The park is on a peninsula formed by Pohick Bay on the north, Belmont Bay on the south and the Potomac River to the east. The park has an area of 1,814 acres and is home to bald eagles, great blue herons, ospreys, and many other types of wildlife. The park also contains white-tailed deer and many species of lichen. Mason Neck State Park is one of the best locations to view bald eagles in northern Virginia.