Archaeology Day

at Washington State Park

9/5/2026 | WASHINGTON STATE PARK | DE SOTO, Mo.

Washington State Park is once again celebrating Missouri Archaeology Month with a day of public archaeology activities on the first Saturday of September. 

This event is cosponsored by Missouri State Parks and the Three Rivers Chapter of the Missouri Archaeological Society. All activities are free and open to the public; there is no need to register.

Event schedule:

Archaeology activities and demonstrations – 10 a.m. to 2 p.m. at Shelter #2

Stop by Shelter #2 in the Big River Day-Use Area to check out a variety of interactive activities and demonstrations. View interesting archaeological artifacts and see demonstrations of flint knapping.

Petroglyph tour – 2 p.m. at the petroglyph site Across From Shelter #1

Join park staff for a guided tour of the petroglyphs, the park's history carved in stone. Learn about the carvings, the culture and community that created them, and what they might mean. Enjoy a short stroll on a covered walkway with interpretive panels highlighting the cultural features.

Washington State Park Contact Information:

  • Address: 13041 State Highway 104, De Soto, Mo.
  • Phone number: 636-586-5768