Kauapea Beach, Secluded beach in Kīlauea, United States.

Kauapea Beach is a sand shore on Kauaʻi's north coast with golden grains stretching roughly 800 meters (half a mile). Steep cliffs and dense plant growth frame both sides, creating a secluded coastal setting.

Kauapea Beach lies between the Kīlauea Lighthouse and Kalihiwai Valley on Kauai's north shore, about half a mile northwest of Kilauea town. No public road reaches it, so access has always been on foot down the cliff trail. The beach is also called Secret Beach, and its lava-rock outcrops divide the sand into First, Second and Third Beach.

The beach's official name is Kauapea, while "Secret Beach" comes from its lack of any public road; access is by an unpaved, unmarked track off Kalihiwai Road. Black lava outcrops divide the sand into First, Second and Third Beach, names used locally. Nude sunbathing, long associated with the beach, has ended; Larson's Beach is now the only Kauai beach frequented by nudists.

Getting down to the shore involves a steep trail that takes about ten minutes, with no facilities or lifeguards present. Pack your own water and snacks since there are no shops or food services at the location.

The black lava outcrops crossing the sand divide Kauapea into three stretches, known as First, Second and Third Beach. About a quarter mile past the west end, a waterfall drops roughly 15 feet straight into the Pacific. Tidal lagoons form at the west end, working as a shallow pool for children.