| Location | Sighting Info | Description |
|---|---|---|
| William in Rocky Mountain National Park, CO | Recalls a sighting of Slender Man simply appearing behind and within the trees of the mountains, often just watching | A nine foot skinny man with no face, only white skin, in a suit |
| Maddie in Estes Park, CO | Describes going on a hike with her dog when it suddenly starting barking and freaking out after seeing a tall slim man behind a tree | A white, tall, faceless man in a black suit |
| Frank in Red Feather, CO | Talks about going camping with girlfriend when suddenly heard a branch snap. While going out to look, he reports seeing a tentacle grab a branch then snap back, connecting to a tall man behind a tree. | A tall, 9-10ft man who only has flat-white skin, with a black suit on and black tentacles coming from his back |