Hiking from Koloa Ridge to Kaipapa'u Ridge in Hau'ula, Oahu, Hawaii on July 17th, 2010. Many hikers take a side trail off of Koloa Ridge into Koloa Gulch to hike to the waterfall. Instead, we passed that junction and headed further up Koloa Ridge to eventually meet up with Kaipapa'u Ridge. The entire route gets confusing because of the many junctions that are met along the six mile loop. Because Kaipapa'u Ridge rarely ever gets hiker traffic, the trail would disappear and reappear without warning, so we had to do a little trailblazing along the way. It is definitely not recommended for beginner hikers. We got lost about three times. Go with someone who knows the route.