A historical image of visitors and bears in Yellowstone National Park.
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![A historical image of visitors and bears in Yellowstone National Park.](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/masonry/public/thumbnails/image/YNP_03019_0.jpg?itok=EBwybmVM)
A historical image of visitors and bears in Yellowstone National Park.
Grinnell Glacier from Footbridge 1920.
Grinnell Glacier from Footbridge 1920.
Blackfoot-Jackson 1914
Grinnell Glacier from Lake Josephine 1914.
Grinnell Glacier from Lake Josephine 1914.
Boulder Glacier - Terminus - 1913
Boulder Glacier - Terminus - 1913
Agassiz Glacier, GNP - 1913
Agassiz Glacier, GNP - 1913
Chaney Glacier - notch - 1911
Chaney Glacier - Terminus - 1911
Chaney Glacier - Terminus - 1911
Grinnell Glacier from trail 1911.
Grinnell Glacier from trail 1911.
Grinnell Glacier, GNP - 1911
Grinnell Glacier, GNP - 1911
Grinnell Glacier from trail 1910.
Grinnell Glacier from trail 1910.
Boulder Glacier - Chapman Peak - 1910
Boulder Glacier - Chapman Peak - 1910
Swiftcurrent Glacier 1910 (port)
Swiftcurrent Glacier 1910 (port)
Grant Glacier - 1902
Grinnell Glacier from trail 1900
Grinnell Glacier from trail 1900
Grinnell Glacier 1887
Grinnell Glacier from Footbridge 1887.
Grinnell Glacier from Footbridge 1887.