Message posted by Joerg (Webmaster) on February 28, 2018 at 20:40:43 PST:
The road shows up on old topo maps. Possibly an old access road to a mine that is now being explored by off-duty Area 51 personnel. The dark object in the images (which I assume you are referring to) could be the entrance to the mine.
In Reply to: Re: Area 51 Road ends in strange place. posted by greatguess on February 28, 2018 at 20:12:33 PST: