Kolowalu Trail 4 Summary Hiking up Mt. Olympus via the Kolowalu Trail is a great introduction into moderate level ridge hiking on Oahu.  This 4.7 mile roundtrip hike features an initially steep trail that ascends to a ridgeline that leads to the 2,486 foot Mt. Olympus.  This hike has plenty of mud, ropes, and elevation … Continue reading Best Hikes on Oahu: The Kolowalu Trail to Mt. Olympus