Kulani was the only person to sweat out the gulch trail with me. The trailhead is located just after The Polynesian Culture Center in Laie. It starts off with a gradual hill climb to a ridge that eventually descends slowly into Koloa Gulch. The slow descent reaches Koloa Stream. Initially, the stream was dry, and we were both pelted by hoards of mosquitoes. As we advanced deeper into the gulch the stream started to show signs of water.
We crossed Koloa Stream well over twenty five times, counting each and every crossing along the way. Counting was especially important on the way back just in case we happened to miss the junction to get back on the ridge. The constant weaving in and out of the stream truly tested our hiking judgement, yet it is very hard to get lost being that you are surrounded on both sides by mountain walls; however, there is a fork near the end of the stream. The right junction leads to where Kulani and I ended at; the left junction leads to another waterfall, but I've heard it isn't as great as the waterfalls we ended at.
Four miles and three-and-a-half hours later, the mountain walls closed in, and Kulani and I finally reached the waterfalls. A small eight-foot waterfall with a swimming pool sits below a beautiful 100-foot waterfall with another swimming pool. The water felt great after the long hike, and the pools were deep enough for Kulani to bomb some suicides. I suck at suicides.
If you're great at suicides, take this hike. It's long, but the reward is a lush 100-foot waterfall nestled deep in the middle of nowhere. The hike is not at all strenuous; however, the rocks in the stream are very slippery, and there are parts where huge boulders covered with moss must be climbed.
Here's the end of the hike. The rope on the left side of this waterfall helps to reach the larger waterfall above and to the right.