Oloʻupena Falls, Towering waterfall in northeastern Molokai, United States

Oloʻupena Falls is a waterfall on the northeastern coast of Molokai where water drops from high volcanic cliffs directly into the Pacific Ocean. The cascade flows across multiple tiers of steep rock faces that descend between two valleys.

Oloʻupena Falls lies on the north coast of Molokaʻi, about 500 m west of Puʻukaʻōkū Falls, in dense vegetation between the Pelekunu and Wailau valleys. Its short seasonal stream spills over one of the world's tallest sea cliffs, cutting a groove in the rock face. The falls carry water only after rainfall; at maximum flow they reach about 12 m wide.

The name Oloʻupena refers to a fishing net, and the falls mark the seaward edge of Pelekunu and Wailau, valleys whose taro terraces and stream water were worked by Hawaiian farmers. The water is seasonal, appearing after rain, so the groove cut in the cliff face is often dry when seen from the sea.

Access is only possible by helicopter or boat tour, as no land routes reach this remote location. Visitors should be prepared for rough ocean conditions and variable visibility, especially during the rainy season.

At full flow the fall widens to about 12 m, but it is intermittent and carries water only after rainfall. Its short seasonal stream rises where the island's uplands receive 2,032 to 3,555 mm of rain a year. It lies 500 m west of Puʻukaʻōkū Falls, in dense vegetation.