This cache came about due to knee problems with half of shazcol so the grades are quite manageable. Expect to take 2->3 hours each way. Those walkers who go at greyhound pace through the bush could do it in less. During winter the falls can be partially frozen and the track rating of 3.5 would apply, less than 3.5 during summer.
Find your way to Mersey Forrest Road (C171) and turn left onto Dublin Plains Road then right onto Fisher Road till the road is blocked and the new carpark reached around 1.5KM from the Little Fisher River Bridge that now has a steel walkway spanning it. Walking about 5.7KM from the new carpark the original carpark and trailhead is reached bringing the total distance to the falls now to around 9.3KM one way.
Take the hint as GPS reception was poor. You are going to see the falls, not spend heaps of time looking for the cache. The walking track continues on to other adventures if you are a keen fisherman or walker but you can investigate those yourself.
You will be in the Walls of Jerusalem National Park so take your Parks Pass.
This is an exposed location, be prepared particularly in winter. Snow or poor weather can happen at any time of the year.
NOTE: The LIST Map reference and name search have Rinadena as the correct official name of the falls.
NOTE: No dogs are permitted in the World Heritage Area!