Park Information

Once known as Mount Ellison, this elegant fieldstone mansion showcases the mix of English and Dutch influences in the Hudson Valley's history. During the Revolutionary War, the property served as a bustling military headquarters for some of Washington's highest-ranking officers, including Generals Henry Knox, Nathanial Greene, and Horatio Gates. Rooms are carefully furnished in period style, including a slave quarters and several unique "hands on" rooms where guests may handle reproductions of original furnishings and clothing.  

Hiking trails allow guests to explore the woodlands and provide a dramatic vantage point for viewing the ruins of the Ellison family's 1741 gristmill and the stone King's Highway Bridge crossing the Silver Stream gorge. The Jane Colden Native Plant Sanctuary, also on the grounds, recalls America's first woman botanist through a collection of the plants she catalogued while living nearby.

Knox's Headquarters State Historic Site has been named as a significant stop on the Hudson River Valley National Heritage Area Revolutionary War trail. Knox’s Headquarters State Historic Site is open Memorial Day weekend to the Sunday of Labor Day, Wednesday – Saturday 10:00 AM to 5:00 PM & Sunday 1:00 to 5:00 PM. Tour, school and camp groups are welcome by advance reservation only. Dates, times, hours of operations and admission fees are subject to change. 



289 Forge Hill Rd.

Vails Gate, NY 12584


(845) 561-1765, ext. 22


Things to do and see

  • Living history

  • Public programs

  • Special theme tours

  • Hiking

  • Jane Colden Native Plant Sanctuary

  • X-Country skiing