So, looking at the map in the pbb thread...

Looks like it affects Jeff's Ledges starting just above the drop-in at the air strip, through the area at the bottom of 8 Point and Blacksheep (including the first obstacle of blacksheep), up to just before Green Mamba, and the access road to the east, and the crazy trails up the side of the mountain to the east. Then also the corner may cross Walter's Mule Road just above Green Mamba.

If Walter's Mule road is cut off there, I think that means we would have to go up the mountain at the air strip and come down the one where the entrance is by GM Extension entrance (Walk in the Park?) to get to Green Mamba and GM Extension?