Mt Ka'ala (4025 feet) is the highest summit on the island of Oahu.  Start at Sea Level (0 ft) elevation at Pōkaʻī Beach (Pōkaʻī Bay Beach Park) run Waianae Valley Rd until you reach Mount Kaala Trail which will take you up to the summit of Mt. Kaala. The Mount Kaala Trail technically ends at the top when it runs into Mt. Kaala Rd, there is a sign on the fence that states end of the trail no trespassing past sign. So this is where the official turnaround for the fkt will be.