坎贝尔·斯科特

Campbell Scott

饰：Reader

乔什·卢卡斯

Josh Lucas

饰：Reader

约翰·利思戈

John Lithgow

饰：Reader

德里克·雅各比

Derek Jacobi

饰：Reader

吉因·琼斯

Gene Jones

饰：Reader

萨姆·沃特森

Sam Waterston

饰：Reader

埃里·瓦拉赫

Eli Wallach

饰：Reader

Murphy Guyer

Murphy Guyer

饰：Reader

Carolyn McCormick

Carolyn McCormick

饰：Reader

Tim Clark

Tim Clark

饰：Reader

亚当·阿金

Adam Arkin

饰：Reader

埃米·马迪根

Amy Madigan

饰：Reader

Kevin Conway

Kevin Conway

饰：Reader

Lee Stetson

Lee Stetson

饰：Reader

彼德·考约特

Peter Coyote

饰：Himself - Narrator

Carl Pope

饰：Himself - Sierra Club

Terry Tempest Williams

饰：Herself - Writer

菲利普·博斯科

Philip Bosco

饰：Reader

汤姆·汉克斯

Tom Hanks

饰：Reader

Dayton Duncan

饰：Himself - Writer

Alfred Runte

饰：Self - Historian

Lee Whittlesey

饰：Self - Historian

Clay Jenkinson

Clay Jenkinson

饰：Self - Historian

Stewart L. Udall

饰：Self - Former Interior Secretary

Brad Washburn

饰：Self - Explorer

Tom Bodett

饰：Reader

卡尔·鲁伯利

Carl Lumbly

饰：Reader

John Trudell

饰：Reader

Albert McFadyen

饰：Reader

William Cronon

William Cronon

饰：Self - Historian

Shelton Johnson

饰：Self - Park Ranger

Paul Schullery

饰：Self - Writer

Gerard Baker

饰：Self - Park Superintendent

Kenneth Brower

饰：Self - Writer

John Hope Franklin

饰：Self - Historian

安迪·加西亚

Andy Garcia

饰：Reader

詹姆斯·凯森·李

James Kyson Lee

饰：Reader

武井乔治

George Takei

饰：Chiura Obata