National Natural Landmarks

I'ao Valley

I'ao Valley
I'ao Valley

I'ao Valley and the volcanic rocks on its enclosing slopes illustrate the major episode of volcanism that created the western portion of the island of Maui. Erosion of the volcanic rocks has resulted in an amphitheater shaped valley.

Location: Maui Island, HI ; Maui County, HI

Year designated: 1972

Acres: 47,382

Ownership: State, Private

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