The collection is organized in accordance with the following series and subseries arrangement: 

Series I. Administrative Records, 1925-2001

     Subseries 1 - Minutes, 1928-1995

     Subseries 2 - Incorporation Records, 1953-2001

     Subseries 3 - Membership Records, 1947-1993

     Subseries 4 - Legal and Financial Records, 1928-1967

     Subseries 5 - Property Records, 1925-1999

Series II. Club Activities, ca. 1925-2002

     Subseries 1 - Club Outings, 1925-2002

     Subseries 2 - Winchester Lookout, 1983-1986

     Subseries 3 - Photographs, ca. 1925-1980's

     Subseries 4 - Newspapers and Clippings, ca. 1940-1972

     Subseries 5 - Film, 1948-1952

     Subseries 6 - Song Books, 1926, 1978-1979

     Subseries 7 - Club History Files, 1909-2004

     Subseries 8 - Printed Hiking Information, ca. 1927-1980

     Subseries 9 - Maps, ca. 1902-1974

Series III. Club Newsletters, 1928-2004

Series IV. Club Scrapbooks, 1925-1985

Series V. Mountaineering Periodicals, 1897-1983

Series VI. Mountaineering Publications, 1916-1986