The peninsula that today contains Delta Lake State Park was created when the
Mohawk River was impounded in 1908 to form
Delta Lake, a
reservoir intended to supply water to the
New York State Barge Canal. The
New York State Canal Corporation leased approximately to the
New York State Office of Parks, Recreation and Historic Preservation for the creation of a state park in 1962. In 2005, it was announced that the Canal Corporation would officially transfer the park's land, along with an additional , to the NYSOPRHP, bringing the park's total area to . In 2023, a portion of the park was created into a large dumping station, as previously there was only one small one. == Facilities ==