St. Mary's of the Mountain Church was an historic Roman Catholic church on New York State Route 23A in Hunter, Greene County, New York. The church was completed in 1839 and is a one-story, four by two bay, post and beam frame structure on a modern concrete foundation. It features a moderately pitched gable roof, narrow clapboard sheathing, two engaged corner towers, and a Romanesque style engaged entry / bell tower. Also on the property is the parish cemetery.
It was added to the National Register of Historic Places in 1999.
It was razed on 04/12/2017.