St. Louis Region
Jefferson Barracks Park is both a park and a history stop
St. Louis County's Jefferson Barracks Park combines trails and recreation with museum buildings, exhibits, monuments, and other history features.
Jefferson Barracks Park is one of those St. Louis County places where a walk can turn into a history stop without leaving the park. The county park includes museum buildings with exhibits, monuments, walking trails, archery, disc golf, and The Pavilion at Lemay.
Treat it as both recreation space and county history space. A picnic shelter, trail walk, museum visit, or disc golf round can sit under the same park umbrella, but the question changes: reservation, rule, amenity, or program. Military-site and cemetery questions can belong to a different agency, so keep the county park piece separate.
The useful starting point is the park itself: Jefferson Barracks Park, The Pavilion at Lemay, and St. Louis County Parks. Those names keep a simple outing from turning into the wrong-office search.
References
Where this fits: this note belongs to St. Louis County. See every local note for the county on its page.