Court documents show the boy had received his license the day before the Oct. 5 crash in the city of Spokane Valley.
KREM reports the 16-year-old is recovering from injuries and hasn't been charged. The case is being investigated as vehicular homicide.
The teen was giving the two girls a ride from a birthday party on a Saturday night. Investigators believe he was driving 50 mph in a 25 mph zone when he lost control and hit a tree along a section of road known as the Ponderosa Jump.
The crash killed McKenzie Mott and Josie K. Freier, both University High School students.