Camp Maluhia BSA
Don't stop driving yet. You'll find the hike at the end of a paved road off the Kahekili Highway around 7 miles outside (North) of Wailuku. If you need a little more reassurance that you're at the right place, keep a lookout for the red "Camp Maluhia BSA" post.
As the road leaves the main highway, drive uphill through a series of sharp bends and take a left-hand fork, before reaching the parking lot and the trailhead.