Haleakalā, or the East Maui Volcano, is a massive, active shield volcano that forms more than 75% of the Hawaiian Island of Maui. The western 25% of the island is formed by another volcano, Mauna Kahalawai, also referred to as the West Maui Mountains.
Elevation: 10,023 ft (3,055 m)
Location: Maui, Hawaii, U.S.
Prominence: 10,023 ft (3,055 m)
Isolation: 76 mi (123 km)
Listing: Highest ocean islands 18th · World most prominent peak 85th · US most prominent peaks 10th · Ribu
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The most venerable and polished of the tour-and-activity sites. – BBC