Tripod Rock

• Tripod Rock is glacial erratic or "perched boulder" located in Kinnelon, New Jersey in the Pyramid Mountain Natural Historical Area. This famous multi-ton Precambrian gneiss boulder, located near the edge of a long ridge, is balanced on three smaller boulders. It is roughly 6 metres long, 3 metres wide, and 2.5 metres high. Its weight has been estimated as approximately 127 tonnes. There is a peculiar triangular crest running the length of its top.