"Yellowstone National Park and Part of Abutting Forest Reserve from Maps by the U.S. Geological Survey", U.S. Geological Survey (USGS)

This beautifully-colored topographical map was issued by the Park Superintendent after maps by the U.S. Geological Survey. It shows the entire park in great detail at a scale of four miles per inch. Legend identifies ranger stations, snowshoe cabins, existing roads, unused roads, trails and more. It locates the remote Shoshone, Lewis and Heart Lakes; names the Upper, Shoshone, Gibbon, and Heart Lake Geyser Basins, Mud Geysers, Mammoth Hot Springs and more. There is terrific detail of topography with contour intervals at 100 feet, watershed and numerous features.

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Condition: A

Issued folding on a bright sheet.