He made a film record of his solitary life which was later re-edited and made into the documentary "Alone in the Wilderness". In 2011 a sequel was produced after enough footage for at least two more programs was discovered. "Alone in the Wilderness: Part 2" premiered on December 2, 2011. Proenneke's cabin was added to the National Register of Historic Places in 2007. In 1999, at age 83, Proenneke left his cabin and moved to Hemet, California, where he lived the remainder of his life with his brother Raymond "Jake" Proenneke. He died of a stroke on April 20, 2003, at the age of 86. He willed his cabin to the National Park Service, and it remains a popular visitor attraction in the still-remote Twin Lakes region of Lake Clark National Park. Sam Keith, who got to know Proenneke at the Kodiak Naval Station and went on numerous hunting and fishing trips with him, suggested that Proenneke's journals might be the basis for a good book. In 1973, Keith published the book "", based on Proenneke's journals and photography. Proenneke however alleged that Keith had "changed some things" to embellish the story. After years in print it was re-issued in a new format in 1999, winning that year's National Outdoor Book Award (NOBA). A hardcover "commemorative edition", celebrating the fortieth anniversary of the publication of "One Man's Wilderness", was published by Alaska Northwest Books in 2013. In 2003, some of the copyrighted text from the book and some of Proenneke's film were used with permission in the documentary "Alone in the Wilderness", which began appearing on U.S. Public Television. It follows Proenneke's life as he builds the cabin from the surrounding natural resources and includes his film footage and narration of wildlife, weather, and the natural scenery while he goes about his daily routine over the course of the winter months. In 2005, the National Park Service and the Alaska Natural History Association published "More Readings From One Man's Wilderness", another volume of Proenneke's journal entries. The book, edited by John Branson, a longtime Lake Clark National Park employee and friend of Proenneke, covers the years when the park was established. Proenneke had a very close relationship with the Park Service, assisting them in filming sensitive areas and notifying them if poachers were in the area. "The Early Years: The Journals of Richard L. Proenneke 1967–1973" was published by Alaska Geographic in 2010.