Desert Dino?

A bunch of us were fishing yesterday at a local lake and while walking by a sandstone cliff I saw what looked like the fossil remains of something really big. it was over 7' long and was shaped exactly like a spinal column. I have no idea if it is just a freak natural rock formation or a real dino bone. IF it is a dino bone would anyone care? It may have just been uncovered by the recent rains. Any thoughts? The pictures are from my cell phone so not great but you can get the idea. Click on the picture to enlarge.