Let's go back to the events that lead to the death of the Beast. After another victim, the marquis d'Apcher leads a hunt on June 18th 1767 in the evening. The next day around 10:30 a.m., at the sogne of Auvers, Jean Chastel kills the real Beast of Gévaudan. I've studied the hunt on this page, so I will study here the location of the death of the Beast...
Location: the sogne of Auvers and the forest of Tennezeyre.
If we still know today where is this mythical place, what most of the people don't know is what did the sogne look like by the time of the Beast. In fact if you wander around Auvers, you can see the totelity oif Mount MOuchet covered with woods and the sogne lost in the woods. But in the time of the Beast, the flank of the mount that is i the valley of the Desge river had only one forest (probably the one belonging to the marquis) and the woods of Tennazeyre were only covering a small part of the north side of the mount.
Above, a transposition of the forest as in the maps by Cassini on Google Earth. One can see how the landscape doesn't look the same (at least concerning woods). Because in the place of many of today's forests, there were fields, crops, small thickets... Though the map by Cassini specifi to that part of France was only drawn in 1777, there are few chances that the forest significantly changed in ten years, and considering the rigor of these cards, one can safely think that the forests were drawn with as much rigor as the rest of the elements on the map.
With the picture above you can see that the sogne, by that time, was not in the woods but on the border, at around 100 or 200 meters from the main woods.
It was a swampy part on the top side of the flank, above the forest. After many thoughts, keeping those elemnts in mind, I've tried to find on the net
pictures tht could fit.
I didn't, so I Photoshoped one I found close enough.
Though Cassini gives a clear shape to the forests he draws, I think it's wise to think that the woods of Tennezeyre ended like on the picture above: tall grass, scattered trees, spongy ground, coming up on one side to the summit of Mount Mouchet and coming down to the forest. On next picture, the sogne as it mught have been (the village in the back, though too close, could be Chanteloube or Auvers).