The fallen tree seen in episode 5 is actually located only a hundred or so yards away from where they shot Jacques Renault's cabin. In fact, the whole walk that Cooper, Truman, Hawk and Doc Hayward took that day, with the exception of the exterior shot of the Log Lady's cabin, was filmed right around the cabin, which is located deep in the woods of the Angeles National Forest.

The fallen log has since been moved a little and partially sawn apart. Below, a photo of the clean cut on the stump and a different angle of the rest of the tree.