Authorities were tipped off to the remote area, located about 70 miles from Boise, after a horseback rider Wednesday reported seeing a man and a teenager matching the description of DiMaggio and Hannah.
DiMaggio's car was found covered in brush near Cascade, Idaho, on Friday, San Diego County Sheriff Bill Gore said.
The blue Nissan Versa was found without license plates, but authorities were able to determine that the vehicle belonged to DiMaggio through its identification number, Gore said.
While police believed DiMaggio might be armed with explosives and could potentially use them to rig his vehicle or hideout, the Boise Police bomb squad did not find any explosive devices inside or near the car during their initial search Friday afternoon, Ada County Sheriff's spokesman Patrick Orr said.
The Associated Press contributed to this report.