So a repeat of my earlier timeline with updates - it may or may not be precisely accurate depending on news sources' accuracy:
Nov 19th - Met male hiker (plus another in foreground?) - no place mentioned in the post
Nov 21st - posted on instagram
Nov 22nd - spoke to Dan via Whats App and sent picture at Pico de Sauvegarde
Seen by witnesses in the afternoon going up the mountain (with no snow on the peak) as they came down and requesting fruit - Marti Vigo del Arco and friend
Nov 23rd - due to walk to Refuge Venasque?
Nov 25th - due to return home
Nov 28th - Dan reported on social media that she was missing and not heard from for 6 days
May not be accurate - please let me know of updates
IMO she embarked on a new trip on the 21st, from Benasque, Spain. I haven't invested the time to try to figure out where she was when she returned to her van on the 19th, likely elsewhere.
Her partner reports her plan was to walk to the Venasque refuge from the summit of Sauveguard ie an addition 3 hour hike after climbing up. But as we saw in her post on the 19th, her plans could change depending on how much time she had and how she felt. She wasn't actually due anywhere, she could just camp, instead.
So, given the lateness of the day, perhaps she had changed her plan and was going to find a place to camp on or at the bottom of Sauveguard.
There's a variety of trails and directions she could have gone after that, depending on what peaks she wanted to summit and what scenery she wanted to see.
I believe that she was supposed to end her hike on the 25th, but unfortunately the published info is confused, perhaps someone else can clarify. She was reported missing by the French Sar on their FB on the 25th, I linked this earlier.