Estling Lake is a lake in Denville Township, New Jersey with a small private summer community of approximately 60 houses and is owned by the Estling Lake Corporation. The lake is fed by Den Brook and drains over a dam into Indian Lake. New Jersey Transit's Montclair-Boonton Line runs along the north shore of the lake. The lake's residents participate in a variety of sporting events with other nearby lakes such as Parsippany, White Meadow, Rainbow, , Mountain, Indian, Intervalve, Telemark, Rock Ridge, Lake Valhalla, and Cedar known as the "Hub Lakes." An ice house existed on the lake until it was destroyed in the early twentieth century.