From the carpark on Maraetotara Road, you can get to the falls by heading down the wooden stairs and following the Maraetotara Historic Walk for about 10 minutes to the base of the waterfall. At the bottom end of the reserve is a heritage power station.
There is a great swimming hole at the base of the waterfall, so take a towel if you feel like a dip. Some people jump from the top of the falls, but it is dangerous and not recommended.