This 10 mile loop of paved road is a favorite for many of Oahu’s runners and cyclists. It delivers 1500 feet of elevation gain on the 5 mile climb up the mountain and a fun, twisting descent. The west side ascent up Tantalus Drive offers great views of Nu’uanu Valley and Pearl Harbor and the descent down the eastern Round Top Drive provides glimpses of Waikiki, Kahala and Diamond Head. One full loop takes approximately 90-120 minutes to complete.