Violet Lake (), is a small high-elevation lake located at above sea level on Mauna Kahalawai (the West Maui Mountains), situated in the western part of the island of Maui. It is located in the boggy slopes near the ûEke Crater and Puûu Kukui, the highest peak of the West Maui Mountains. It is approximately in size.
The lake's English name derive from the reflected color of the lake's surface and also the Maui violet (Viola mauiensis) which grows on its banks. The Hawaiian language name Kiûowaiokihawahine means the "pond of Kihawahine".
The lake was important to the traditional Hawaiian religion. During ancient times, the lake and surrounding summit area was protected by kapu and regarded as the meeting place of heaven and earth. The lake was believed to be the home of the Hawaiian moûo (lizard) goddess Kihawahine, who was associated with the aliûi nui (high chiefs or kings) of Maui and an ûaumakua (family deity) of Queen Keà Âpà «olani, a descendant of the Maui royal line and the highest-ranking wife of King Kamehameha I, who established the Kingdom of Hawaii, and their son Kamehameha III. Kihawahine was also associated with the wetland and former royal complex at Mokuûula located in the watersheds below the lake in Lahaina.
The surrounding montane rainforest ecosystem on the slopes of Puûu Kukui Watershed Management Area (the second wettest spot in the Hawaiian Islands) is extremely diverse and home to many endemic species. The lake's own unique ecosystem has not been well studied. Species include the dwarfed ÃȈ Âhiûa lehua tree (Metrosideros polymorpha), the Maui violet (Viola mauiensis), a variety of Hawaiian lobelioids (Lobelia gloriamontis), the Hawaiian damsel flies (Megalagrion spp.), and others. It has been described as an "extremely rare gem" which have "residents and visiting scientists alike".