Olowalu Petroglyphs Professional Review and Guide
"These are some of the most accessible petroglyphs on Maui (not counting those on hotel grounds, some of which are reproductions). The petroglyphs are incised geometric designs and stylized human figures whose meanings are unknown. They are in fairly good condition, though there has been some vandalism. The Hike is short and mostly level, but can be hot and is best done early or on an overcast day.
Follow the dirt road mauka (toward the mountain) through weedy wasteland and cane fields. You will see a paved road swing off to your right (east), but stay on the main (dirt) road, ignoring any side trips. A small volcanic cone to the right (northeast), at the mouth of a valley, marks the spot. Scramble up the slope over chunks of broken concrete to a level spot and look to the left (north) to see the petroglyphs. The designs are similar to those all over the Hawaiian Islands, so they surely have some religious significance, but their meaning has been lost. They are not in the best condition, but very much worth seeing."