Denali National Park, Alaska, 1989
New Mexico, 1988
Green River, Canyonlands National Park, Utah, 1993
Canyonlands National Park, Utah, 2004
Canyonlands National Park, Utah, 2004
Colorado River, Canyonlands National Park, Utah, 2004
Green River, Canyonlands National Park, Utah, 1993
Arches National Park, Utah, 1988
Olympic National Park, Washington, 1977
Glacier National Park, Montana, 1983
Bridger Wilderness, Wind River Range, Wyoming, 1994
Utah, 1996
Canyonlands National Park, Utah, 1993
Canyonlands National Park, Utah, 1990
Canyonlands National Park, Utah, 1993
Bridger Wilderness, Wind River Range, Wyoming, 1994
Alaska, 1989
Glacier National Park, Montana, 1983
Glacier National Park, Montana, 1983
Colorado, 1996
Monument Valley, Arizona, 1988
Denali National Park, Alaska, 1989
Mt. Ranier National Park, Washington, 1977
Mt. Ranier National Park, Washington, 1992
Ansel Adams Wilderness, California, 2001
Utah, 1996
Ansel Adams Wilderness, California, 2001
Olympic National Park, Washington, 1977
Canyonlands National Park, Utah, 1977
Monument Valley, Arizona, 1988
Gates of the Arctic National Park, Alaska, 1995
Gates of the Arctic National Park, Alaska, 1995
Gates of the Arctic National Park, Alaska, 1995
Gates of the Arctic National Park, Alaska, 1995
Gates of the Arctic National Park, Alaska, 1995
Gates of the Arctic National Park, Alaska, 1995
California, 1990
Colorado, 1990
Canyonlands National Park, Utah, 2004
Yosemite National Park, California, 1984
Grand Teton National Park, Wyoming, 1994
Grand Teton National Park, Wyoming, 1976
Mt. Ranier National Park, Washington, 1992
Utah, 2004
Arches National Park, Utah, 1988
Ansel Adams Wilderness, California, 2001
San Juan Mountains, Colorado, 1996
Yellowstone National Park, Wyoming, 1993
Utah, 1988