Saint Croix Bluffs Regional Park is a 579-acre park in Washington County, Minnesota. Located just outside Denmark Township on the Saint Croix River, the park is the southernmost public park on the Saint Croix National Scenic Riverway. St. Croix Bluffs Regional Park on St. Croix Trail opened in 1996 on a site purchased and developed in the 1940s by architect Thomas Ellerbe, later the Control Data Corporation employee park. It is one of seven regional parks in Washington County. The park has rolling prairies, wooded ravines, and scenic bluffs. It is managed by the Minnesota Department of Natural Resources.