Harrisville State Park is a public recreation area on Lake Huron at Harrisville in northeastern Michigan, combining heavily forested land with a mile-long sandy beach. Established in 1920 as one of the first parks created after the Michigan State Parks Commission was formed, it grew from six acres to 107 acres. The Cedar Run Nature Trail, cut through the woods by 1945, remains a central feature. The park is especially important for birding, as large spring migrations of warblers and other songbirds pass through along the Lake Huron shore. It now offers camping, swimming, boating, trails, picnic areas, and other day-use and overnight facilities.