She says the suspect pinned her down on an old mattress behind a dumpster and raped her, and when she screamed, no one came to help.
The victim and her mother spoke to Eyewitness News about the alleged attack.
"I screamed three times three loud times. The first time I screamed he'd put his hand over my mouth, he slapped me and told me to shut up," the victim said.
"I want make him pay for what he did to my daughter. I want the ultimate punishment, and he'd be lucky if the cops catch him before I do," said mother Tina Torres.
The victim says the suspect also threatened her with a gun, although she never saw it.
The suspect is described as a Hispanic man, between 18 and 20 years old, thin build and black hair. He was wearing a black baseball cap with L.A. on the front and a silver L.A. earring.
Montclair police are offering a $1,000 reward for information leading to his arrest. Anyone with information is urged to call (909) 621-4771.