Police say the 17-year-old driver was trying to put the Ford Explorer into gear around 1 a.m. Sunday when it began to roll backward. The girl tried to stop the SUV to no avail and jumped out before it picked up too much speed.
The vehicle rolled down a hill, through a fence and crashed into the pool at Cameron Estates in Washington.
The driver suffered minor bruises and no other injuries were reported.
A crane pulled the SUV from the pool later Sunday.