Not that this means anything, but the App. Trail is not far from here, Mt. Washington is 50 miles as the crow flies. A female hiker this past late spring vanished after speaking to he husband by cell phone. 2-3 wk. search party, reward, helicopters- nothing, never found.
Surrounding wilderness says it all, if someone from the area did something, she may never be found, it could be like searching for a needle in a haystack. Nothing found til coming snow is gone and a hiker stumbles across something. Hope that is not the case. After this weekend the next busy time is ski season.
Just surmising, feeling bad for her and the family. Hoping for a good outcome.