"Climbing up the Koolau The Pali Puka trail is a short distance, but the trail was much more exposed and challenging to negotiate than the length of path suggests. The trail is hidden beyond the parking lot at the Nuuanu Pali Lookout and follows along the ridge line of the Koolau mountains. The ridge of these mountains is quite thin in places, and their steep rock faces on the windward side of Oahu are not very inviting. A "puka" is the hawaiian word for "hole." Appropriately, at the end of this short hike, there is a hole in the ridge where satisfied hikers can enjoy the view over windward Oahu, or look back down the lush and green Nuuanu Valley toward Honolulu."