After about five miles of climbing, Tantalus Drive becomes Round Top Drive, and the runner is rewarded with a pleasant coast back down to the bottom. Distance 10 mile loop. Some folks run this one twice or even three times for a great, long run. Shade is available almost all day due to the forestation. Water and restrooms are available at the Nature Center about 0.5 mile up the road from the pumping station.
Water is available on the run, but it is sometimes hard to locate.
If you don't know where the water is, carry your own. To Get There From Honolulu From H1 East, take the Punahou exit. At the light at the end of the exit turn left and proceed mauka on Punahou. Proceed through the first light, and turn left on Nehoa Street. Take your second right onto Makiki Street, and follow the fork left onto Makiki Heights Drive.