Kaluanui Natural Area Reserve

Spanning 378 acres along Oʻahu’s windward slopes, Kaluanui was the first Natural Area Reserve established in the Koʻolau Mountains. The reserve encompasses Kaluanui Valley mauka of Kaliuwaʻa Falls (Sacred Falls) and stretches up over the crest, though it does not include the Sacred Falls trail below. Across its native lowland wet forests and wet cliffs, the terrain shelters 29 endangered or rare species, alongside stream waters that serve as prime habitat for all five of Hawaiʻi’s native freshwater fish species.