This is a hike to do...great ocean, Waikiki and other city views. Easy hike. You can taxi or shuttle to park center, pay your dollar, short hike to the top and get a million dollar view!
First trip: we taxied. This trip I walked from lower side of Waikiki to park center and up...about an hour or so walk park and then up to crater. You get to pass along some gret catal views and beautiful homes. The long walk there, short hike and long walk back makes for a nice morning.
Morning is best to beat the heat and crowds.
1-2 hours taxi/shuttle
4 hours walk to-from city