I only find this road on the OSM maps. The names are confusing me too. But the section I am asking about is labeled "Hwy 23-Satevo". What you are describing sounds like it could be the road. Dajuice found it on Google Earth and says it looks like a fairly wide gravel road with a bridge (probably?) at the Batopilas River. From there it ties into the road which is labeled "Guachochi-Satevo". That road originates in Guachochi and shows it going to Batopilas. I guess the safe bet for me, is to stay on the road south from Creel all the way to Guachochi. Then north and west to Bato. But I am hearing that Guachochi doesn't offer a whole lot and the mystery road would sure seem to cut off some miles getting from Creel to Bato this way. Any advice and comments appreciated!!