Traveling from west to east, it passes Deep Den before ultimately exiting the southeast of the Westerlands. From there, it passes back and forth along the border between the Reach and the Riverlands (the road itself does not mark the border). First it runs through the extreme north of the Reach, then it crosses the border into the Riverlands at the point where the Reach/Riverlands borderline intersects with the Blackwater River. After crossing into the Riverlands the road follows the north bank of the Blackwater all the way to King's Landing.