The incident occurred shortly after 1 a.m. in the 9500 block of Carkeek Dr. S. Police said the girl was walking home from a nearby light rail station when she noticed a man was following her.
The man, whom she'd seen on the light rail platform, soon caught up with the girl, grabbed her by the jacket and tried to pull her to the ground. When the girl did not lose her balance or fall, the man attempted to push her down an embankment and tried to pull off her leggings, police said.
The girl fought back, punching the man while screaming. The man then fled the scene.
Officers searched the area by foot and by air, but could not find the man. He remains at large.
Police said they have obtained surveillance footage of the suspect captured by Sound Transit cameras.
The suspect is described as an East Indian man in his 30s who is about 5-foot-7 with a medium build and short black hair. He was last seen wearing a black Chicago White Sox hat, black leather jacket, white shirt, dark pants and dark shoes.
Anyone with information on the case is urged to call 911 immediately. Anonymous tips are welcome.