Ignore the road outlines on the map after south sister lookout road

From st marys go up german town road until you get to the south sister lookout road

Go up south sister lookout road until you get to the long straight grey course gravel road

Go to the end of that and there will be a 4wd track to the left

Follow the 4wd track until you get to a T junction (the junction will be about 100m past a big bog hole)

Go left at the T junction and follow the track until you get to another small 4wd track to the left

Follow the small 4wd track and take the first right

Go along the track to the right all the way to the end and just before the end there should be pink ribbon and a small bike size track on the left

Go down the bike track until you get out onto a 4wd track

Go right and follow the 4wd track, then take the left when you get onto another 4wd track

Follow that and it will come out in cornwall

A normal car can get to the end of the grey course gravel road
A 4WD can get to the pink ribbon
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If you need more info or details msg me, photos available.