The City of Petoskey invites you to stay at our beautiful campground, Magnus Park, in the city along Lake Michigan Shoreline. It features 72 sites. Telephone 231-347-1027 Summer or 231-347-2500 Winter. Our knowledgeable and helpful staff members welcome you to the recently expanded 144-slip marina in Petoskey. Telephone 231-347-6691 Summer or 231-347-2500 Winter.