Haiku is the town on Oahu where the trail begins. This hike climbs the height of two of the World Trade Towers or 2400 ft. to the peak summit. Some vertical sections are quite spine tingling especially when wet and foggy. Thats why its a jungle area here, as its a very wet temperate area on the windward side catching all the Pacific ocean moisture.Going up is one thing but going down is even harder. Just like many mountain climbs most accidents are are the descent.