Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock () or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Aerial view of the National Elk Refuge (left) and the town of Jackson, Wyoming (right) with inset map of study area including the National Elk Refuge and areas around the refuge of winter elk habitat.
Aerial view of the National Elk Refuge (left) and the town of Jackson, Wyoming (right) with inset map of study area including the National Elk Refuge and areas around the refuge of winter elk habitat.
Aerial view of the National Elk Refuge (left) and the town of Jackson, Wyoming (right) in 2007.
Aerial view of the National Elk Refuge (left) and the town of Jackson, Wyoming (right) in 2007.
Bison in Yellowstone National Park.
Boulder Glacier - 2005 color
Boulder Glacier - 2005 black and white
Chaney Glacier - Terminus - 2005 color
Chaney Glacier - notch - 2005 color
Agassiz Glacier, GNP - 2005 black and white
Agassiz Glacier, GNP - 2005 color
Agassiz Glacier - 2005 color
Agassiz Glacier, GNP - 2005 black and white
A protective snowshed at the confluence of two avalanche paths that start ~3,000' above the shed. This shed is located in southern Glacier National Park and protest part of the railway from avalanches. This is one of many avalanche paths impacting the railway.
A protective snowshed at the confluence of two avalanche paths that start ~3,000' above the shed. This shed is located in southern Glacier National Park and protest part of the railway from avalanches. This is one of many avalanche paths impacting the railway.
Avalanche debris of snow, soil, and piece of twisted metal deposited on U.S. Highway 2 near Glacier National Park. The avalanche flowed over and around the protective railway shed in the background.
Avalanche debris of snow, soil, and piece of twisted metal deposited on U.S. Highway 2 near Glacier National Park. The avalanche flowed over and around the protective railway shed in the background.
Two rocky mountain bighorn sheep resting on a steep slope in Dinosaur National Monument.
Two rocky mountain bighorn sheep resting on a steep slope in Dinosaur National Monument.
Boreal toad (Bufo boreas) mating ball, Bridger-Teton National Forest, Wyoming.
Boreal toad (Bufo boreas) mating ball, Bridger-Teton National Forest, Wyoming.
Grant Glacier - 1998
Aerial photograph of South Cascade Glacier, WA taken August 13th, 1958.
Aerial photograph of South Cascade Glacier, WA taken August 13th, 1958.
Agassiz Glacier, GNP - 1943
Grinnell Glacier 1938
Grinnell Glacier, GNP - 1938