General Washington twice chose Morristown due to its strategic location, including proximity to New York City, defensible terrain, important communication routes, access to critical resources, and a supportive community. The park encompasses ground occupied by the army during the vast 1779-80 encampment, and the site of the fortification from the 1777 encampment. The Ford Mansion, where Washington made his headquarters, is an important feature of the park and recalls civilian contributions to the winning of independence.
The national park consists of four non-contiguous units: Washington's Headquarters with the Ford Mansion and Headquarters Museum, the Fort Nonsense Unit, the Jockey Hollow Unit, and the New Jersey Brigade Area. The Jockey Hollow Unit includes the Wick house (headquarters of General Arthur St. Clair), five reconstructed soldier huts, and approximately 27 miles of walking trails.