Fall is one of the best times of year here in the northeast. This is just one of the many large lakes in New York State. The great Sacandaga. The Great Sacandaga Lake (formerly the SacandagaReservoir) is a large lake situated in the Adirondack Park in northern New York in the United States. ... Great Sacandaga Lake is a reservoir. The original lake was greatly enlarged by a dam on theSacandaga River at the northeast end of the lake. http://www.visitsacandaga.com/history.htm here is a great site to visit and learn about the lake.