A ski area operated in Oyster Bay, NY on the north side of Long Island in the late 1940's until at least 1959. This area was definitely small, with the longest slope being 800' long. Skiing was cheap however, with rates ranging from 1 dollar to 1.50. It was mainly open weekend and holidays, with night skiing during the week.
As the area had no snowmaking, it was open only rarely, whenever there was more than 2" of snow on the ground. I imagine that the slopes had to be very smooth to operate with such little snow cover. The area appears to be totally grown in and/or developed today according to Terraserver.
Category: Not approved ski