A man grabbed her arm and tried to drag her to a secluded portion of the park, according to the /*Sheriff's*/ department.
The girl broke away and ran to her cousin, who was playing nearby, and park personnel called law enforcement.
The suspect is described as a white male in his 30s, about 5 feet, 10 inches tall with a medium build. He was wearing a white T-shirt, brown shorts and dark sunglasses.
He drove away in a silver compact car with a spoiler.
Anyone with information is encouraged to contact the Los Angeles County Sheriff's Parks Bureau at (800) 834-0064. Anonymous tips can be made by calling (800) 222-TIPS (8477).