Elizabeth Hartwell Mason Neck National Wildlife Refuge is open year-round, including federal holidays, from 7AM - 5PM October 1- March 31 and 7AM-7PM from April 1 - September 30. Staff temporarily closes the refuge during managed deer hunts in November and December. Call the headquarters office or check this website for scheduled closures.
Help staff ensure that wildlife has a place to grow and survive for future generations by respecting refuge rules and obeying posted signs.
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In the early 1960’s a developer sought out land on Mason Neck to build a planned community and airport. Elizabeth van Laer Speer Hartwell, a local resident, who valued the pristine nature of the peninsula, organized an effort to stop this development. She recognized the potential of the Mason Neck peninsula as a safe haven for the endangered bald eagles along the Potomac River.