Park Hours Park Hours Weather Check Weather Coordinates 37.619815, -90.640029 Park HoursFor temporary closures related to weather, stewardship activities and maintenance, as well as temporary trail closures, click here to visit our Park and Site Status Map. Historic Site Grounds: Sunrise to sunset, year-round Visitor Center hours(Free tours are offered during these times.) April 16 through Nov. 30 10 a.m. to 4 p.m., daily Historic Site Office hoursApril 16 through Nov. 30 8 a.m. to 4:30 p.m., Monday through Friday