Mastodon State Historic Site

Park Information

Mastodon State Historic Site contains an important archaeological and paleontological site – the Kimmswick Bone Bed. Here, scientists discovered the first solid evidence of the coexistence of humans and the American mastodon in eastern North America.

Today, visitors can learn about this discovery and how the landscape of Missouri looked in pre historic time. The site features a museum with an interpretive video, displays of ancient artifacts and fossils, and an impressive mastodon skeleton replica. Programs explain more about the significance of the site.

For anyone wanting to stretch their legs, the site offers three trails, including one that leads to the site where the bones and artifacts were found. The park also offers picnic sites, a picnic shelter, a playground, a special-use area for organized youth groups, and a wildflower garden that attracts birds and butterflies.

Park Hours

Historic Site Grounds

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

Museum hours

  • March 16 through Nov. 14
    9 a.m. - 4:30 p.m. Monday-Saturday
    12 p.m. - 4:30 p.m. Sunday (closed Easter Day)
  • Nov. 15 through March 15
    11 a.m. - 4 p.m. Monday
    Closed Tuesday-Thursday
    11 a.m. - 4 p.m. Friday and Saturday
    12 p.m. - 4 p.m. Sunday
    Closed New Year's, Thanksgiving and Christmas days
Historic Site Office Hours
  • 9 a.m. to 4:30 p.m., Monday through Saturday
  • 12 p.m. to 4:30 p.m., 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.