Moss Ledge is an Adirondack Great Camp designed by William L. Coulter in 1898 for Isabel Ballantine of New York City.

The camp was one of Coulter's first commissions after moving to Saranac Lake in hope of a cure for his tuberculosis.

The name is taken from a nearby rocky, moss-covered ledge that still is a notable feature of the shoreline.

The camp consists of a main lodge, guest house, dining hall, boat house, and, some distance from the rest, a tea house built on a promontory overlooking the lake.

The style is similar to nearby Camp Pinebrook, another Coulter design.