:welcome4:
Thanks for the welcome.
Also, I just wanted to add a response to some comments I've seen about it being unusual terrain for someone to train on for a race - I've hiked both Old Rag and White Oak Canyon Ceder Falls. From looking at the map, if she parked at the Lower White Oak Canyon parking lot (not the one off Skyline) which seems to be the conclusion from other posts here, then ran/hiked up the White Oak Canyon Trail she could cut over on fairly flat trails/fire roads to other trails that would be fantastic for running, White Oak Canyon to Old Rag Fire Road and back to the White Oak parking from the Berry Hollow Fire Road. It looks like she could have planned a pretty good trail running circuit and avoided the more treacherous hikes, specifically the difficult (rock scrambles) part of Old Rag that have previously been described here. Plus, I'm not in the greatest of shape and I was able to hike them - I'd imagine at her fitness level, she'd think nothing of running there. (here is the map again) https://www.nps.gov/shen/planyourvisit/upload/whiteoak_canyon_area.pdf
I didn't see when exactly they closed the trails to search for her, but with the beautiful weather this past weekend, if she were injured a short distance off any of the trails that are being searched, she would have likely been noticed by hikers since Old Rag and White Oak Canyon are very popular on nice weekends.
I think the police suspect that she went to SNP on her own but she was in the wrong place at the wrong time and some creeper snatched her off the trail.