High Quality Content by WIKIPEDIA articles! White Pines Forest State Park, more commonly referred to as White Pines State Park, is an Illinois state park in Ogle County, Illinois. It is located near the communities of Polo, Mount Morris and Oregon. The 385-acre (1.6 km2) park contains the southernmost remaining stand of native white pine trees in the state of Illinois, and that area, 43 acres (170,000 m2), was designated an Illinois Nature Preserve in 2001.