Mountaindale is a hamlet (and census-designated place)[1] in the town of Fallsburg in Sullivan County, New York, United States, situated at an altitude of 1,010 feet (310 m).

Helen Brown, principal of Mountaindale High School in 1931, told stories of children being sewn into their long underwear in October to be cut out in April, and one particularly poignant story of a young man who played on Mountaindale High School's basketball team who broke a leg going up for a rebound when her husband had taken them to New York City to scrimmage the Columbia freshmen.

[2] The hamlet is also famous for the "Yeshiva Zichron Mayir of Mountaindale", a school founded by Rabbi Yehuda Davis[3] in 1960 in Brooklyn, NY.

[4] Mountaindale came within hours of hosting Bach to Rock Festival a concert intended to rival Woodstock in both scope and size.

For the month of August in 1970 the hamlet played host to over 50,000 hippies until a court order halted the concert less than one day before it was to open.