Diamond Head took the place of the volcano’s original name of Laeahi, given to the crater by ancient Hawaiians. The name means “brow of the tuna” and signifies Diamond Head’s resemblance to just that. A visit to Diamond Head Hawaii does require some walking. The Diamond Head hike is along a volcanic trail ascending to a 761-foot peak beginning inside the historic landmark. It’s is an easy but steep hike that takes an hour to an hour and a half. The trail considered an easy to moderate ascent.