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Yes, this is a linear wall stretching for a number of miles. The area has numerous "stonewall" formations which center around the Spanish Peaks. Climbing the 13,626 ft. peak lets one see just how many walls there are. Geologist from around the world come to study these hogbacks.
The nearby town of "Stonewall" has a spectacular skeleton protruding from the ground (pic follows). Regular visits would probably be a good idea. It's a little over two hours away, and with so many sites to visit and shoot, I don't get there to often (bad gravel road as well).