| Spooktacular | Meramec State Park | Camping | Oct 16, 2020 to Oct 17, 2020 |
| Cancelled: Campground Trick-or-Treating | Watkins Mill State Park | Camping | Oct 17, 2020 |
| Cancelled: Campground Trick-or-Treating | Watkins Woolen Mill State Historic Site | Camping | Oct 17, 2020 |
| Halloween Event for Registered Campers | St. Francois State Park | Camping | Oct 24, 2020 |
| Fall Fun Event | Wallace State Park | Camping | Oct 24, 2020 |
| Cancelled: Cuivre Halloween Spooktacular | Cuivre River State Park | Camping | Oct 24, 2020 |
| Wakonda State Park Spooktacular 2020 | Wakonda State Park | Camping | Oct 24, 2020 |
| Halloween Campground Events | Onondaga Cave State Park | Camping | Oct 24, 2020 |
| Public Halloween Event | St. Francois State Park | Camping | Oct 31, 2020 |
