Ahupuaʻa ʻO Kahana State Park
A whole valley, reef to ridge, run as one state park.
Kahana keeps an old Hawaiian land division intact, with a living community still inside it. Walk the short Kapaʻeleʻele trail to a fishing shrine and a bay overlook, or just take the beach at the river mouth. No entrance fee. Camping books through Explore Outdoor Hawaiʻi.