Yellowstone National Park, January 2019: Elk in Mammoth Hot Springs, Yellowstone National Park, January 31, 2019. Photo by Susan Pilaszewski-O'Neil. [#9770-0559] Click on image for next photo.

Elk in Mammoth Hot Springs, Yellowstone National Park, January 31, 2019.  Photo by Susan Pilaszewski-OŽNeil.  Click for next photo.

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All photos ©1998-2019 by Thomas O'Neil