The road ends and a fire road begins. This becomes a very steep, muddy, rocky and rutted climb and is damn scary coming back. This fire road leads to heaps of other roads and trails, mainly fire roads, but the odd singletrack here and there. There are other gates further down Mt Crosby Rd, just keep a look out. Ride along any fire road in the area and you shouldn't have any trouble.
Surfaces are typically loose and rocky, and muddy if it's been raining.
This mud is bright red and stains clothing permanently, so I suggest only going when it's dry. You can easily spend all day here. I would recommend the latter. All these three entrances lead onto major fire trails. As most of the reviews have said there are heaps of tracks in there.