Gray’s vehicle was first spotted at a popular Markleeville-area parking spot for hikers in late March.
When it was still there on April 5, deputies found food in coolers and the keys still in the vehicle.
Rescue teams searched area hiking trails and along the East Fork Carson River.
Deputies say Gray’s disappearance is still being investigated with the help of the Washoe County Sheriff’s Office in Reno.
Friends say they don’t know why Gray was in the Sierra Nevada. She reportedly was en route to Texas.