Mason Neck State Park: Beach and Bay Professional Review and Guide
"This short hike features the water and marshes of the Mason Neck area. Look for ducks, swans, and geese, especially in spring and fall. Mason Neck is a peninsula formed by Pohick Bay, Belmont Bay, and the Potomac River, and is home to many types of birds including herons, bald eagles, and swans.
It is adjacent to Mason Neck National Wildlife Refuge. The park has a series of trails, all very well marked. Several programs are offered throughout the year, including bald eagle–watching and birding walks, campfire talks, and animal tracking. The Environmental Education Center is surrounded by butterfly gardens, which create a spectacular show in summertime."