The 17-year-old girl was waiting to be picked up from Valencia High School on Monday near North Dickason Drive and Newhall Ranch Road, when she says the man grabbed her.
The suspect is described as 5 feet 10 inches tall, weighing 250 pounds with brown hair, brown eyes and acne scars.
Authorities say the girl was able to break free and hide behind a nearby building. The suspect took off in an early 1990s Toyota pick-up. The car was described as red with heavily tinted windows and the word "Toyota" written in white letters across the tailgate.
If you have any information that can help investigators, you're urged to call the Santa Clarita Sheriff's Department at (661) 799-5141.