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at Mastodon State Historic Site

To reserve this shelter, visit our reservation page, or contact the historic site to check for availability by calling 636-464-2976.

picnic shelter

Shelter Amenities
  • Eight picnic tables
  • One grill
  • Maximum occupancy: 80
  • Distance to creek: 300 yards
  • Distance to playground: 50 feet
  • Distance to restrooms: 150 yards

For more information about the historic site's picnic area, click here.

Park Hours


38.379444, -90.395000

Park Hours

For 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.

On the following days (actual or observed), staff will not be available and site buildings will be closed: Christmas Eve; Christmas Day; New Year’s Eve; New Year’s Day; Jan. 2, 2023; Martin Luther King Jr. Day; Lincoln’s Birthday; and Presidents Day. 

Historic Site Grounds

  • 8 a.m. to half-hour after sunset, daily, year-round

Museum hours

  • March 16 through Nov. 15
    Museum closed Monday and Tuesday
    9 a.m. to 4:30 p.m. Wednesday through Saturday
    Noon to 4:30 p.m. Sunday (closed Easter Sunday)
  • Nov. 16 through March 15
    Museum closed Monday through Wednesday
    11 a.m. to 4 p.m. Thursday through Saturday*
    Noon to 4 p.m. Sunday
    *Closed Thanksgiving, Christmas and New Year's days
Historic Site Office Hours
  • 9 a.m. to 4:30 p.m., Monday through Saturday
  • Noon to 4:30 p.m., Sunday (closed Easter Sunday)
  • Please note 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.