The Manoa Falls trail is directly behind Waikiki Beach and the University of Hawaii Manoa. The Arboretum is at the entrance to the Trail Head but was not open the weekend I was there (possibly a Sunday). Parking at the Pay Lot is $5 but includes "bug spray". You can park about 6-8 blocks back in residential - and walk. Hiking in valleys you'll find bugs - hiking ridges you won't. The difference is the amount of wind/breeze. This hike can be very wet and slippery with steep slopes. Be very careful with kids - and when it rains.

Manoa Falls is a spectacular site as it tumbles down a near vertical cliff for approximately 150-feet into a small pool. The hike to the falls is classified as "easy" and travels through a bamboo forest, rainforest, and base of the Ko'oaus Mountains. The trail is approximately a 1 ½ mile hike, but DO NOT swim or drink the water. The small pool at the bottom of the falls is filled with boulders and the bottom of the pool can not be visualized making it unsafe for swimming or diving. Swimming violators may be cited.