Starting at Garden Castle Reserve office, walk towards the gum trees to the right of the office and towards Hermits Wood Campsite. From here, follow the path up with the Mlambonja River on your right.
You cross the Mlambonja River and climb up a short wooden ladder to the other side just before the 3km mark from the start.
After a few hundred metres you cross the river again and then head upwards on the steepest section of the hike to Pillar Cave, at most this is about 1km. Return via the same route.