Facility Hours

Harry S Truman State Park

2025-2026 State Holidays

On the following days (actual or observed), staff will not be available and park buildings will be closed: Thanksgiving Day; Nov. 28, 2025; Christmas Eve; Christmas Day; New Year’s Eve; New Year’s Day; Martin Luther King Jr. Day; Lincoln’s Birthday; and Washington's Birthday.

Know Before You Go: Park and Site Status Map

For temporary closures related to weather, stewardship activities and maintenance, as well as temporary trail closures, please visit our Park and Site Status Map.

Park Grounds

Sunrise to sunset, daily, year-round

Campground Beach

Beach closed for the season

Day-Use Beach

Beach closed for the season

Park Office - Harry S Truman

April through October (On-Season)

10 a.m. to 2 p.m., daily

November through March (Off-season)

The park office is closed, but staff are usually available in the park daily. The office telephone is monitored for messages between 8 a.m. and 5 p.m., Monday through Friday.