Great detour off I-70 west bound if you have a high clearance vehicle
Black Dragon wash gets its name because of one of the petroglyphs, which oddly enough is a red dragon. The trail can be kind of hard to find but once you are in the canyon it is impossible to lose it. You follow the canyon for a bit and then you will see the petroglyphs on the north side beyond some wood fencing. I wouldn't drive anything with less clearance than a truck in here. Very scenic.