The truck was spotted Monday evening amid the search for three missing teens from Fontana. Three bodies were also found at the scene of the crash, but officials have not confirmed the identities of the bodies.
Authorities were searching for 19-year-old Daniel Gamboa, 18-year-old Kasey Vance and 17-year-old Samantha Ornelas, who were reported missing by their families.
Police said the teens told family members Saturday they were going to the Angeles National Forrest, possibly near Mount Wilson.
The teens were believed to be in a white 2008 Toyota Tundra pickup truck owned by Gamboa. Officials confirmed the truck found in the Angeles National Forest on Monday belonged to Gamboa.
The truck was found crashed over the side of Angeles Crest Highway at mile marker 40, approximately two miles from Mount Wilson Road.
Video from near the scene of the crash showed family members of the missing teenagers on their knees praying and crying in agony.
Authorities said some of the victims were ejected during the crash.