The incident happened last Sunday just before 5 p.m.
Authorities say the suspect approached the 9-year-old victim from behind, touched the girl and then ran away.
The suspect is described as a white male in his 30s or 40s, approximately 240 pounds, with black hair with some gray.
He was wearing a blue long-sleeve shirt, dark jeans and glasses (white metal wired).
Anyone with information in regards to this incident is asked to call Crime stoppers at 1-800-577-TIPS (8477).