No obvious trail, and I'm certain she wasn't hiking down the mountain and back up to the Port de Glere at 4PM.
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@otto, I agree with
@CoverMeCagney (CMC). I think DC and the press coverage (even today's) are using the two points on ED's intended route - Pic de Sauvegarde and Port de Glere - as two key milestones. IMO, this does not imply ED followed a direct line between them, because as you have affirmed, there doesn't seem to be a trail.
Given that, we could consider ED started a loop on 22/11
after she summited the pic de Sauvegarde (or even if she didn't go all the way up). The loop that
@Skiptolou suggested a little while back, IMO, confirmed for us this is a possible loop that fits ED's intended route. But ED could have taken it clockwise or counter clockwise.
1. Counter Clockwise: ED could have done as CMC suggests, above. From the pic de Sauvegarde summit and/or the port de Vanesque (if ED did not go all the way up the to the summit) ED could have aimed for the winter room of the refuge de Vanesque for the night of 22/11 (or to bivouac outside). From there she could head towards the Hospice de France and loop through the chemin de l'impératrice towards the Cabane de la port de glere. Then she could loop back to the Refuge de V.
2. Clockwise: Obviously it is what is described above in reverse. Please see the attached map. The question this could pose is whether ED would have stayed at the Refuge de Vanasque the night of 22/11 or if that late afternoon she hiked clockwise towards the Cabane de la port de glere, perhaps that depended on available light?
I have reattached
@Skiptolou's map, with added graphics on the loop to help explain what I am trying to say here...
As others have said about this scenario, if ED did this loop in either direction, she would have stayed the night of 23-24/11 somewhere - in a cabane / hospice / bivouac, etc. That alone leaves many possibilities wide open. And of course, what she did the afternoon / night of 21/11 (i.e. per my "two loop theory") may simply be irrelevant...
But this loop does fit the vague descriptions of ED's route that DC and the MSM refer too... and fits otto's sleuthing that focused us back on the port de la glere. That said, I suggest looking at this description of the pic de Sajust, which appears to be on the route between the Refuge de V and Port de Glere area, I think... Wow!
Pic de SAJUST
Food for thought!