Johnson's Shut-Ins Dolomite Glade


Missouri Evening Primrose
Designated as a natural area since
MO Department of Natural Resources
Johnson’s Shut-Ins State Park
Contact Phone

Points of Interest:

  • See a glade developed on dolomite, in contrast to the extensive igneous glades in the surrounding Johnson’s Shut-Ins State Park.
  • Enjoy a season long progression of glade wildflower blooms.

Natural Features Description:

This glade developed on dolomite of the Davis formation, a Cambrian period rock formed over 500 million years ago. Few dolomite glades such as this occur in the St. Francois Mountains region. It has a set of plant species including gum bumelia, Missouri evening primrose, rose verbena, calamint, and glade heliotrope that are not found on nearby igneous glades.

Access Info

This natural area is within Johnson’s Shut-Ins State Park. Access to this natural area is difficult. Inquire at the park office about a visit to this natural area. To reach the park office: from the intersection of Highway 21 and Highway N north of Pilot Knob (Iron Co.) go west nearly 13 miles to the park entrance on the left (south). Follow the signs to the park office.