Unless I took a wrong turn, it's actually 132 K to Ojos Negros. The locals said, "todo durecho," or just go straight, but sometimes there's a fork in the road. No worries, upon closer inspection, it appears that the trail has adequate signage. Close to the top. Civilization! Never, ever have I been so happy to find pavement. I wouldn't recommend that anyone else solo this ride on a big GS. The road may not look bad in the pics, but it is very challenging, with frequent sand, huge washes, deep, deep, gullies, uphills, downhills, and lots of rocks.