Passable when slightly wet, in fair condition, and under 20 km in one run. Every unsealed road on or near the route, judged against that.
Park road with some steep pinches, ending at a wheelchair-accessible boardwalk.
Short spur off Saltwater River Rd.
Fair, but a long detour off the A5 on a ferry day.
Gazetted C-road, graded gravel and sand, Parks-rated 2WD. Tour buses and delivery trucks use it, which keeps it graded. Rougher after heavy rain; one review called it one of the best unsealed roads they had driven.
Short park access road off the C302.
Steep and winding with sharp bends, and used by logging trucks. Keep left on blind corners.
Short spur near Pyengana.
Narrow, winding, corrugated in places, climbing to about 1,000 m. Subject to ice and occasionally closed. Fine for any car taken slowly.
Gravel, described as in very good condition for a sedan.
Forestry road, generally fair.
Gravel but in good condition and fine for 2WD. Watch for active logging.
Old mining access, generally fair.
Fine against your rule - well graded, under 20 km. It is the day it needed that you no longer have.
Steep unguarded switchbacks on loose surface, and snow is likely on Ben Lomond in early November.
Long remote gravel south off Gordon River Rd.
Long remote gravel from Arthur River to Corinna.
Rough forestry road.