* The Book of the Woods
* Forest Giants: The Tallest Trees on Earth
* Walking the High Valley
* Washington Wildlands
* Wild and Scenic Washington
* Wonderland: An Alternative History of the National Parks
* The Battle of the Wilderness: The Sierra Club's Challenge of the Grand Canyon Dam Project
* Beneath the Surface: The Failure of the Glen Canyon Dam
* From Here to Eternity: Traveling the World to Find the Good in People and the Wonders of Nature
* Journey's End: Life and Death in the Mountains
* Life and Death on the Grand Canyon
* The Life and Times of an American Original
* The Lone Ranger and Tonto Fistfight in Heaven
* Looking Over the Edge
* The Mountains Above the Sky: A Naturalist's Ramblings
* On High Ground
* Our National Parks: America's Best Idea
* The Secret Forest
* The Story of the Wild West: A History in Three Parts
* This Amazing Land
* Wilderness in a Changing World
* Yellowstone
Articles
* "The Case Against Grand Canyon Dam" (Sierra Club Bulletin, 1964)
* "Wilderness: A Place for Man" (National Parks Magazine, 1966)
* "The High Cost of Water" (Audubon, 1967)
* "The Glen Canyon Dam: A Boondoggle" (The Nation, 1968)
* "The National Parks: A Call to Action" (The New York Times, 1969)
* "The Death of the Grand Canyon" (Life, 1970)
* "The Wilderness Act: A Promise Unfulfilled" (Sierra Club Bulletin, 1971)
* "The Fight for the National Parks" (National Geographic, 1972)
* "The Future of the National Parks" (Audubon, 1973)
* "The Importance of Wilderness" (The New York Times, 1974)
* "The Last Stand of the National Parks" (Sierra Club Bulletin, 1975)
* "The Politics of Conservation" (The Nation, 1976)
* "The Sierra Club: A History of the First Century" (Sierra Club Bulletin, 1977)
* "The Wild and Scenic Rivers Act: A Promise Fulfilled" (Sierra Club Bulletin, 1978)
* "The National Parks: A Legacy for the Future" (National Geographic, 1979)
* "The Last Great Wilderness: The Arctic National Wildlife Refuge" (Audubon, 1980)
* "The Battle of the Wilderness: The Sierra Club's Challenge of the Grand Canyon Dam Project" (Sierra Club Books, 1981)
* "The Glen Canyon Dam: A Tragic Mistake" (The Nation, 1982)
* "The Wilderness at Risk: The Reagan Administration's Attack on America's Wild Lands" (Sierra Club Bulletin, 1983)
* "The National Parks: A Call to Arms" (The New York Times, 1984)
* "The Legacy of John Muir: A Call to Action" (Sierra Club Bulletin, 1985)
* "The Future of the National Parks: A Blueprint for Action" (National Geographic, 1986)
* "The Last Stand of the Wilderness: The Arctic National Wildlife Refuge" (Audubon, 1987)
* "The Grand Canyon: A Celebration" (Sierra Club Bulletin, 1988)
* "The National Parks: A Call to Renewal" (The New York Times, 1989)
* "The Legacy of Stanley Wright Aultz: A Call to Action" (Sierra Club Bulletin, 1990)