Facility Hours

Mark Twain 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 10 p.m., year-round

Beach

Season: May 22 to Sept. 7
Sunrise to sunset

Park Office - Mark Twain

April through October (on-season)

  • 10 a.m. to 4 p.m., Tuesday through Saturday
  • Closed Sunday and Monday

November through March (off-season)

  • 10 a.m. to 4 p.m., Friday and Saturday
  • Closed Sunday through Thursday