Oriole Grove Forest Preserve in Lake County straddles the Lake Bluff - Lake Forest border following the Skokie River. The preserve does not have its own parking lot, so you must access it from either the Lake Bluff Openlands or Lake Forest Openlands parking lot. On our first visit, we entered through the Lake Bluff Openlands parking lot. We first wandered through the prairie before heading into the woodlands of the preserve.