Finding out roads are rarely used rough trails created by the early settlers, which were Native Americans, is part of the fun of Gravel Riding !.
In all seriousness, Google Maps has errors and the basic RWGPS map is based on Google. There are a bunch of alternative maps on RWGPS you can toggle that *might* show a different road condition and there’s always Satellite view to verify, which I would do if not familiar, especially dirt roads.
FWIW, I was using a RWGPS created route in eastern Long Island, so a reasonably densely settled area of the U.S. and discovered that where I was supposed to make a right turn, the road didn’t exist. I can state I never expected Google to have that kind of error in this area. Utah, OK. Attached is a screen shot of “Jerusalem Hollow Road”, it doesn’t exist, but a glance at satellite shows it’s dirt, but doesn’t have a connection at its SW end.
