Ravine Park is a community park located in Lake Bluff, Illinois. Measuring roughly 14 acres in area, it is dominated by a ravine formed by an ephemeral stream that flows after heavy rainfall and consists of a series of muddy ponds otherwise. The park's main attraction is a small system of nature trails. Ravine Park is one of the only officially protected ravineā¦Ravine Park is a community park located in Lake Bluff, Illinois. Measuring roughly 14 acres in area, it is dominated by a ravine formed by an ephemeral stream that flows after heavy rainfall and consists of a series of muddy ponds otherwise. The park's main attraction is a small system of nature trails. Ravine Park is one of the only officially protected ravines in all of Lake County, Illinois and offers a refuge for nature in the densely inhabited suburbs of Chicago.