This 11.5km trail drops steeply into Sailors Gully along an old 4WD track. The trail then levels out along the scenic Collie River (which is well worth a look - and maybe a swim) before the single track climb back up the Mill Brook drainage.
A good level of fitness and lots of water is advised for this longer loop.
Tips: The trail is only sign-posted for the clockwise circuit. However it is possible to ride the trail in either direction and if you like downhills then riding it anti-clockwise; descending the steeper singletrack Millbrook Gully and climbing the more gentle doubletrack Sailors Gully is likely to be more fun.
Despite the supposed black diamond rating, there are few serious technical obstacles on this trail.
It is a bit remote, and has plenty of elevation - but that does not justify the rating in my opinion.
If it wasn't for the Collie River, I would not really see the point. That does make it worth-while, though.
Note: 4WD use the trail along the Collie River.
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