When I was a teenager, I would hike alone in the Cascade mountains. It was a bit safer back then, but I learned how risky it actually was after becoming stranded in the Mexican desert with a friend (car wouldn't start leaving the trail head). We were both fit and kept our wits about us. So, everything turned out fine - just hiked 30 miles out overnight when it was cool. Hopefully, this girl didn't get into a situation like that alone.