Washington Crossing Open Air Theatre

The Open Air Theatre in Washington Crossing State Park in the Titusville section of Hopewell Township, Mercer County, New Jersey, is a permanent outdoor venue with a six-month summer seasonand has hosted a variety of performances, including musicals, plays, concerts, and dance recitals. The venue is available for use by submitting a special use application to the Park Office.

The theatre was built in 1935 as part of the New Deal's Works Progress Administration (WPA) programme. It was designed by architect Aymar Embury II, who also designed the Cape May Point State Park Lighthouse and the New Jersey State Capitol Annex.

From 2010–2017, the venue was leased by the Downtown Performing Arts Center (DPAC). The company have now moved indoors and rebranded as the Music Mountain Theatre. The company has no intentions of coming back, and the theatre has remained closed and abandoned since.