Mount Haleakalā, Maui County, Hawaii Mount Haleakalā is a shield volcano on the island of Maui, HI (USGS, n.d.). The summit of Mt. Haleakalā reaches 3,055m (10,023ft)(USGS, n.d.) and the mountain's climate ranges from alpine desert to tropical rainforest (NPS, 2015a). Hawaii’s climate is largely controlled by the Tradewinds that run east to west (Gotsch, 2014), making the eastern side of Mt. Haleakal ā the windward side. Notably, all soils on the island are andisols (UCDavis, n.d.; USGS, n.d.)—soils formed from volcanic rock and ash (MacDonald, 2003). The first location of interest, a ranger station in Haleakalā National Park, has an elevation of 2,122m (6,962ft)(NOAA, n.d.) and is located north of the summit, falling slightly towards the leeward side of the mountain. The dominant soil type in this area is Kaipoioi loam (UCDavis, n.d.), which has a deep, illuviated B horizon (MacDonald, 2003). Further, the A and B horizons are very dar...