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1986 Map of Dot Island

Name: 1986 Topographic Map of Dot Island
Creator: U.S. Geological Survey
Published: 1986
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1986

About this map

Yellowstone Lake dominates this 1986 provisional survey, revealing the intricate shoreline of the West Thumb and the isolated landforms of Dot Island and Frank Island. The map documents a landscape defined by the water's edge, where specialized geological features like Sand Point and Rock Point mark the transition from the timbered uplands to the expansive lake surface.

Further inland, the drainage systems of Weasel Creek and Solution Creek feed into the larger hydrologic basin, while Delusion Lake sits tucked behind the main shore near Eagle Bay. This mid-1980s data, compiled by the U.S. Geological Survey from 1980 aerial photography, provides a precise record of the shoreline and elevation contours before later environmental shifts altered the backcountry topography of Yellowstone National Park.