Click here for more information on boating in the park. Hours On-Season: 7 a.m. to 9 p.m.Off-Season: 7 a.m. to 6 p.m. Weather Check Weather Coordinates 38.435976, -90.817838 Park HoursFor temporary closures related to weather, stewardship activities and maintenance, visit our Park and Site Status Map. Park Grounds Summer Hours (On-Season) April through October 7 a.m. to 9 p.m., daily Winter Hours (Off-Season) November through March 7 a.m. to 6 p.m, daily Park gates open and close at these times. Boat Launch hoursOn-Season: 7 a.m. to 9 p.m. Off-Season: 7 a.m. to 6 p.m. Park Office hours April through October (on-season) 8 a.m. to noon, Tuesday through Saturday Closed Sunday and Monday November through March (off-season) Closed There will be times when the office is temporarily closed while staff are working on the grounds. The office telephone is monitored for messages during office hours.