That girl is a sharp and tough cookie.
Unintended flight into IMC? Mechanical/instrument failure during IFR flight? It’s a miracle the girl survived.
That part of Washington is very rugged and remote. The crash must have happened within a few miles of Hwy 20, the only significant road in the area. If the girl had walked any other direction than she did, she would probably still be out there.
I;ve hiked through north central WA state. Real thick forest is an understatement and a first time amateur finding an opening trail there is indeed a miracle.