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). They 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 to see them is short and mostly level, but can be hot so it’s best done early or on an overcast day.
To reach the petroglyphs just follow the dirt road mauka, through weedy wasteland and canefields. You will see a paved road swing off to your right (east), but stay on the main (dirt) one, ignoring any side trips. A small volcanic cone to the right, at the mouth of the valley, marks the spot. Cross over an irrigation ditch and look for some iron railings on the hillside on your right, behind a tin shack. These lead up to what used to be a viewing platform."