Dodge No. 4 State Park is a 139-acre Michigan state park on the north shore of Cass Lake in northern Metro Detroit, with about a mile of shoreline on the 1,280-acre lake. It was established in 1922 when the Dodge Brothers Corporation donated the land to remain a public park in perpetuity. Originally named Dodge Brothers State Park No. 4, it holds a distinctive place in Michigan park history as the only remaining Dodge Brothers State Park still keeping its name. More than a century later, it continues to provide public lakeshore access through day-use amenities including swimming, picnicking, boating, fishing, and a fishing pier.