Marking the last part of the road as impassable as it is extremely overgrown and this realistically is where 99% of people are going to stop. You can make it to 9km without trouble in a 4runner/tacoma without pinstripping, stop at the small parking area here and walk the rest of the road.

Up to the lower Brandywine trail at 7.7 km the roadbed is loose and rough on most hills so AWD is likely needed. Beyond this the alders gradually close in, and water bars begin. The road becomes essentially blocked by alders around the 9km mark but is walkable to the end.