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1928 Map of Mauna Loa

Name: 1928 Topographic Map of Mauna Loa
Creator: U.S. Geological Survey
Published: 1928
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1928

About this map

Mauna Loa dominates this 1920s topography, revealing the active volcanic landscape of the Hawaii National Park and surrounding districts before mid-century eruptions altered the terrain. The map meticulously documents recent volcanic activity, including the Lava Flow of 1926 and the Alika Lava Flow of 1919, which are etched across the western slopes of the North Kona District and Kau District. At the summit, the massive Mokuaweoweo Crater is detailed alongside high-altitude landmarks like Sulphur Cone and Pohaku Hanalei.

Historical transit routes through this challenging environment are captured via the Kona Trail and the Ainapo Trail, which provided essential access to the summit before modern road construction. To the southeast, the Kapapala Forest Reserve marks a transition into more vegetated zones, where features like Maunaanu Waterhole and the Noguchi Tunnels indicate early water management and ranching infrastructure in a region defined by its porous volcanic stone.