The Petoskey Winter Sports Park is listed on a Consumers Power map of top ski areas in the northern lower peninsula dating from the 1960’s. They note that it had 3 slopes and a rope tow.
The park is still in operation. Run by the city of Petoskey Department of Parks and Recreation, it offers ice hockey, skating, skate rental, and sledding in addition to skiing and snowboarding. No lifts are mentioned by the city (you can see a rope tow in the 2nd picture in their gallery), but they have a warming hut with fireplace, concession stand, seating, drinking fountain and wireless. The local newspaper states that they have a surface lift and 100′ of vertical. Apparently, there is no charge to use the lift or slopes–cheapest lift ticket ever!