A few miles before entering the town of Hana on the "Road to Hana", at about mile marker 31, the road finally becomes straight. At this point you can start looking for the signs to Waianapanapa State Park. Take a left turn at the sign just past mile marker 32. This has to be your most favorite spot on Maui. This beach park has the only real Black Sand Beach on Maui. You may hear some talk of other black sand beaches, but this is the only one that really qualifies.
Before you leave the parking area for the hike down to Waianapanapa Beach, check out an interesting and very short loop hike at the west end of the parking lot. It’s fascinating and definitely worth a gander. It will only take 20 minutes or so to do the whole loop. At the beach, the jagged lava formations, sea arches, black sand, and crystal-clear blue waters deliver unprecedented scenery not found anywhere on the island, and maybe in the entire Hawaiian Islands. There is a small cave to explore and if that’s not enough to satisfy your curiosity, you can take the coastal hike west of the beach.
The water at Waianapanapa Beach is not really recommended for swimming because ocean conditions can get rough. On the east end of this 122-acre park are facilities for probably the best camping on Maui. There are cabins from &60 to $90 per night. Cabins numbered 5 and 6 are the most private. Warning: they are a bit rustic but the surrounding area makes it all worthwhile. Hopefully, you’re not going to be in your cabin anyway. There is also an area for tents at $12 to $20 per night.