We did the loop hike to see Kahuna Falls (which is mostly obscured by vegetation) and the free-falling Akaka Falls, which plunges 442 feet. The trail is paved so nearly everyone can go (except wheelchairs).
"The Edge. There really is no honest way to explain it because the only people who know where it is are those who have gone over." - Hunter S. Thompson
average hiking speed 0.75 mph
WARNING! Hiking and outdoor related sports can be dangerous. Be responsible and prepare for the trip. Study the area you are entering and plan accordingly. Dress for the current and unexpected weather changes. Take plenty of water. Never go alone. Make an itinerary with your plan(s), route(s), destination(s) and expected return time. Give your itinerary to trusted family and/or friends.