Park Hours Park Hours Weather Check Weather Coordinates 40.184167, -92.643333 Park HoursFor temporary closures related to weather, stewardship activities and maintenance, visit our Park and Site Status Map. Day-Use Areas: April through October (On-Season) 7 a.m. to 10 p.m., daily November through March (Off-Season) 7 a.m. to sunset, daily The day-use area gates close at these times. Park Office hours April through October (On-Season) Usually available in park daily November through March (Off-Season) Usually available in park Monday through Friday The office telephone is monitored for messages between 9 a.m. and 3 p.m., daily, year-round. Please note there may be times when the office is closed while staff are working in the park. Beach hoursSeason: May 27-Sept. 5 10 a.m. to 7 p.m.