Getting there

Set your GPS to the Long Gully carpark.

Route/Trail notes

The walk starts off easy enough. Not far from the carpark you will be required to cross a knee high stream. Following this you will have a nice gradual walk along a well marked trail that will lull you into believing this is going to be a nice short easy day walk. Eventually you will hit the edge of the vertical cliffline and start following the contour to the saddle between the Castle and Mt Mooryan. This section is quite undulating with some fairly easy scrambling sections - it can be a bit tricky navigationally on the way back as there are a few tracks that branch off it, so stay vigilant. 

From the open terrain of the saddle you will get your first glimpses of the huge peaks. You will eventually arrive at a Y in the track - left is the long diversion around the cave, right is the shorter cave route. Highly recommend the cave route - it is rather tight and narrow but on a hot day it is a welcome break from the heat. The first moderate scrambling section is descending out of the cave where you will find a length of rope to assist you. From this point the scrambling will become more regular and more exposed. The first major roped scrambling section (which is also the hardest) will appear not long after the sign advising you that the ropes are not maintained by NSW National Parks. This section requires you to either heavily rely on the rope and pull yourself up the near vertical face, or divert around to the right and carefully cut across. 

The track from this point becomes a little hard to follow due to the frequent scrambling sections. None of it is particuarly difficult so long as you take your time and assess which way is the easiest, and carefully ensure you are following the correct route. Soon you will arrive at the final roped section (which is technically 3 roped sections back to back). The first 2 are pretty straight forward where you could fairly comfortably ascend and descend with only minor use of the rope. The final section is a bit tricky but not exposed. It involves climbing up between 2 walls then pulling yourself over a slight overhang with 2 fixed ropes. But fear not, because after you pass this final section you are less than 2 minutes from the summit where amazing 360 degree views await you! 

Permits/Costs

Free unless camping

Other References

https://www.alltrails.com/trail/australia/new-south-wales/castle-walking-track