- A -
- Mt. Adams -13,931' -
- September 5, 1984 - Chris Wetherill
- November 13, 1999 - Steve Bremner
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- Mt. Aetna -13,745'
- Late June, 1985 - Chris Wetherill
- November 24, 1998 - Gary Swing
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- Mt. Antero - 14,269' -
- August 17, 1970 - Gary Stearns
- July 15, 1983 - Chris Wetherill
- July 1, 1989 - Alan Silverstein
- August 22, 1991 - Mark Vanderbrook
- October 2, 1993- Bob Broeking - The White Spider
- September 10, 1995 - Brian Rachford's Home Page
- July 10, 1996 - Brian Schultz
- July 18-20, 1997 - Los Alamos Mountaineers Club
- August 15, 1998 - Tom Greene
- September 6, 1998 - Mike Kosel
- October 17, 1999 - Jim Mallory's Colorado Mountain Climbs
- May 7, 2000 - Steve Bremner
- June 4, 2000 - Los Alamos Mountaineers Club
- June 10, 2001 - Steve Bremner
- July 15, 2001 - John Maki
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- Apache Peak -
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- Apostle North - 13,860' -
- July 18, 1998 - Chris Wetherill
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- Apostle Middle
- July 18, 1998 - Chris Wetherill
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- Apostle South
- July 18, 1998 - Chris Wetherill
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- Arapahoe Pass
- August, 1996 - Steve Fry
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- Arapahoe Peak - North 13,503'
- June 23, 1986, Alan Silverstein - CMC
- August 2, 1998 - Camilla Bacher
- June 3, 2000 - Theron Welch
- August 26, 2000 - Morgan Brown
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- Arapahoe Peak - South 13,397' -
- June 23, 1986, Alan Silverstein - CMC
- August 2, 1998 - Camilla Bacher
- June 3, 2000 - Theron Welch
- August 26, 2000 - Morgan Brown
- July 7, 2001 - Jim Ippolito
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- Argentine Peak - 13,738'
- September 2, 2000 - Ryan Kowalski
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- Mt. Arkansas - 13,795'
- April 2, 1994- Bob Broeking (3 attempts, 4/2/94, 10/22/94, 12/18/94) - The White Spider
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- Arrow Peak - 13,803'
- August 1-9, 1998 - Los Alamos Mountaineers Club
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- Atlantic Peak - 13,841' -
- July 27, 1997 - Theron Welch
- July 2, 2000 - Ryan Kowalski
- October 21, 2000 - Ryan Kowalski
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- Mt. Audubon - 13,223' -
- Winter - Phil Geo
- August 2, 1987 - Alan Silverstein - CMC
- July 27, 1996 - Steve Fry
- July 27, 1996 - Steve Fry
- October 11, 1998 - Randall Smith
- July 31, 1999 - Brian Rachford's Home Page
- October 23, 1999 - Los Alamos Mountaineers Club
- Winter 2001 - Unknown