According to other articles out here in Arizona, she left her car to climb a couple of ridges to try to get a cell phone signal. She was northeast of Globe on the Res.
There is nothing out there.
There is a road. She was on it. Roads tend to have vehicles on them on regular intervals. If you leave the car, at least walk the road. Roads lead places, like out of reservations and to cities and towns.
The point is she did everything wrong. She is lucky to have lived through the experience.