Puʻu Kukui is a mountain peak in Hawaiʻi. It is the highest peak of Mauna Kahalawai (the West Maui Mountains). The 5,788-foot (1,764 m) summit rises above the Puʻu Kukui Watershed Management Area, an 8,661-acre (35.05 km2) private nature preserve maintained by the Maui Land & Pineapple Company. The peak was formed by a volcano whose caldera eroded into what is now the Iao Valley.