ITs a Jeep testing ground. Jeeps arent much for duning, but love obsticle courses. I was out there memorial day watching them. Also saw some quads intentionaly going through them. Very Funny. They are pretty easy to avoid if you stick to the fence, but if it is night time, and you come over that dune, then I suppose they can surprise you.

 

Yeah, as you can see in the picture they are pretty deep trenches, we discovered them on our trip last year. i personaly thought they were fun to ride through, i think they were about midway back past the sand highway. looks like someone took three or four passes with a dozer, making huge paths in the hill, pretty visable and easy to see though, not too much threat on these ones at least, except to the unexperianced rider we brought with us then, lol as you can see in the pic

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