Kuli’ou’ou Valley Trail 3 Summary The Kuli’ou’ou Valley is a short, family friendly hike into one of the many valleys along Oahu’s Ko’olau Range. The trail is in great shape and ends at a small pool with a waterfall if there has been recent rain. Have you hiked the Kuli’ou’ou Valley Trail before? If so … Continue reading Best Hikes on Oahu: The Kuli’ou’ou Valley Trail