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Feedback on Compatibility Determination

We want your feedback! The U.S. Fish and Wildlife Service welcomes input on compatibility determinations for research and surveys on Occoquan Bay National Wildlife Refuge. Public comments on draft compatibility determination is open until May 28. Link to draft and press release can be found at this link or copy and paste url into browser: https://www.fws.gov/refuge/elizabeth-hartwell-mason-neck/library

Please send comments to potomacriverrefuges@fws.gov or mail to Potomac River National Wildlife Refuge Complex, 14050 Dawson Beach Road, Woodbridge, VA 22191. A physical copy will also be available to read at address listed above. 

Eighteen miles south of Washington D.C., on the banks of the Potomac River, lies a peninsula known as Mason Neck. Here, on February 1, 1969, the U.S. Fish and Wildlife Service created the first national wildlife refuge established specifically for the protection of our nation’s symbol, the bald eagle.
Trash Free Refuge

We are becoming a trash free refuge. Please pack it in and pack it out. We hope that by eliminating the trash cans there will be less liter. Please dispose of your trash at home or at another appropriate location. 

Visit Us

A view of the entrance sign for Elizabeth Hartwell Mason Neck NWR, and main road passing through fall foliage in the surrounding forest.
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There are activities year round at Elizabeth Hartwell Mason Neck National Wildlife Refuge, including wildlife viewing, photography and hunting. Learn more on our Visit Us page.

Location and Contact Information

      About Us

      A photo of a marsh landscape
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      Learn more about our mission, purpose and history on our About Us page.

      What We Do

      The Potomac River NWRC Biologist holds an American Black Duck.
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      Learn about our management practices, comprehensive conservation planning, research projects, and more on the What We Do page.

      Our Species

      A juvenile eastern ratsnake with a gray diamond pattern along its back. The small snake is curled up on bright green moss.
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      The diverse habitats of Elizabeth Hartwell Mason Neck National Wildlife Refuge host over 211 bird species, more than 200 plant species, 31 mammal species, and 40 species of reptiles and amphibians. Visit our Species page to learn more about the inhabitants of Mason Neck! 

      Get Involved

      A group of four admires the newly built overlook at Mason Neck National Wildlife Refuge.
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      Interested in getting involved with what we do at Elizabeth Hartwell Mason Neck National Wildlife Refuge? Visit the link below to learn more.

      Projects and Research

      A Great Blue Heron wading through the wetlands at Occoquan Bay NWR
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      Elizabeth Hartwell Mason Neck National Wildlife Refuge focuses management efforts on the protection of habitat and nesting sites for bald eagles, herons, and other avian species. Current practices are mostly passive, utilizing the natural processes within the hardwood forest to maintain desired habitat.