The largest watershed partnership in Hawai‘i, the Three Mountain Alliance (originally known as the ‘Ōla‘a Kīlauea Partnership) was formed in 2007 and covers 1,116,300 acres. With 10 partners, the overall goal of the Three Mountain Alliance is to sustain the multiple ecosystem benefits of the three mountains of Kīlauea, Mauna Loa, and Hualālai by responsibly managing its watershed areas, native habitats and species, historical, cultural, and socio-economic resources for all who benefit from the continued health of the three mountains.
The Three Mountain Alliance (TMA) encompasses 45% of Hawai‘i Island and includes the three youngest volcanoes, Hualālai, Mauna Loa, and Kīlauea. The TMA contains some of the largest expanses of intact native forest remaining in the Hawaiian Islands, approximately 50% of the State’s remaining native habitat.
TMA lands contain many different types of ecosystems: alpine, subalpine, montane (dry, mesic and wet), and lowland (dry, mesic and wet) ecosystems. The TMA is home to thousands of native species including rare and threatened or endangered species, many of which are endemic to the island.