To get to Kalihi Ice Ponds you basically have to trespass on private property. Apparently they have stepped up security and a fence has been installed as well as a camera. A friend of mine stated that the camera followed them as they walked and warned them to get out, so perhaps it is not the best idea to come here anymore. If you really want to get here you can probably stream hop to reach the ponds, however, do so at your own risk. The ponds are often dirty after rains so although the stream may be flowing nicely, it's probably not within your best interests to swim here. As with all fresh water ponds and streams in the islands, there is a chance of leptospirosis so use your own judgment to determine whether it'll be safe to swim here or not.
Kalihi Ice Ponds
A little further upstream there are a few more waterfalls you can get to.