Thanks to Jed Diehl, we now know of this ski area that operated in a private manner in Concord, MA. Here's his description:
"Across Monument St. on Hutchins Farm a rope tow had been set up for family and friends by the owner of the property. The farm is still there and the hill open (cleared), but no tows remain."
The farm today serves organic vegetables and is located in a very "rural" part of Concord, MA.