| Oct 4 | Fall Festival | Bollinger Mill State Historic Site, Burfordville |
| Oct 4 | Fall Harvest Fest | Washington State Park, De Soto |
| Oct 11 | Fall Fun | Weston Bend State Park, Weston |
| Oct 17-18 | Pomme de Terror | Pomme de Terre State Park, Hermitage |
| Oct 18 | Halloween Happenings | Johnson's Shut-Ins State Park, Middle Brook |
| Oct 18 | Hallowfest | Knob Noster State Park, Knob Noster |
| Oct 18 | Haunting at the Mill | Montauk State Park, Salem |
| Oct 18 | Spooking up the Park | Annie and Abel Van Meter State Park, Miami |
| Oct 18 | Spooktacular | Meramec State Park, Sullivan |
| Oct 19 | Missouri Days: Fall Colors Bus Tours | Crowder State Park, Trenton |
| Oct 22-23 | 2025 Katy Trail Fall Colors Tours | Katy Trail State Park, Rocheport |
| Oct 24-25 | Frightfully Fun Fest | Onondaga Cave State Park, Leasburg |
| Oct 24 | Trick or Treat Night | Bollinger Mill State Historic Site, Burfordville |
| Oct 25 | Campground Decorating Contest and Trick-or-Treating | Knob Noster State Park, Knob Noster |
| Oct 25 | Fall Fun Event | Wallace State Park, Cameron |
| Oct 25 | Halloween Bash: It's Haunting in the Park | Sam A. Baker State Park, Patterson |
| Oct 25 | Halloween Event | Crowder State Park, Trenton |
| Oct 25 | Halloween in the Park | Echo Bluff State Park, Eminence |
| Oct 25 | Halloween Spooktacular | Arrow Rock State Historic Site, Arrow Rock |
| Oct 25 | Halloween Trail Runs | Crowder State Park, Trenton |
| Oct 25 | Canceled: Historical Haunts at the Homestead | Nathan and Olive Boone Homestead State Historic Site, Ash Grove |
| Oct 25 | Jack-o'-Lantern Jubilee | St. Joe State Park, Park Hills |
| Oct 25 | Monster Mash Halloween Event | Stockton State Park, Dadeville |
| Oct 25 | Wakonda Spooktacular 2025 | Wakonda State Park, La Grange |
| Oct 25 | Wicked Washington Halloween Celebration | Washington State Park, De Soto |
