The San Benito County Sheriff's Department said the girl was abducted from Hollister, north of Salinas, on Tuesday.
An Amber Alert was issued Tuesday night to search for 13-year-old Christina Ramirez.
The California Highway Patrol received reports of possible sightings at about 4:40 a.m. Wednesday n San Bernardino.
The CHP confirmed the girl and her suspected kidnapper, identified by authorities as her father 34-year-old Marcelino Ramirez, were found on the 215 Freeway, north of the 10 Freeway.
The Amber Alert was canceled after the two were found.
The girl and the suspect were taken to a CHP station in Sam Bernardino.