Message posted by Dave Bethke on November 30, 2007 at 5:24:07 PST:
Looks like it has something to do with the ranching operations in the area. Appears to be a holding pen or corral. It's just north of Groom Lake Road, north of the northeast corner of Groom Lake and those mountains are the southern end of the Groom Range.
In Reply to: Re: Strange Marking at Area-51 behind Mountains (here is the link) posted by TimeWrap on November 29, 2007 at 18:48:32 PST: