Creve Coeur Lake Memorial Park (also called Creve Coeur County Park) is a 2,145-acre St. Louis County park located in Maryland Heights, Missouri, United States. The park is the largest in the St. Louis County Parks system and includes Creve Coeur Lake, an oxbow lake which is the largest natural lake in Missouri. The park has facilities for picnicking, tennis courts, multi-purpose athletic fields, and an archery course.