Looking at the miles everyone hiked and looking at her Twitter/Facebook pages this girl was struggling being Mormon and probably ran away. She either ran away and is hiding because this went to far or ran away and got hurt or kidnapped. Her Twitter she talks about drugs, smoking pot and mild swearing in acronyms. The pot talk she hides in phrases.
Her Facebook page she belongs to a Utah High School party page kids use to score drugs or find the nearest party.
Also interesting her friend came out today after she has been missing for awhile and says the picture everyone was trying to figure out where it was taken was actually her picture and not Annie's. Annie just posted it. So there is a lot of unknowns here. I bet the trucker who swears she tried to hitch to cali is right, it probably was her.