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Climbed from its toe in the Linda Glacier, or from the nerve below the Bowie Couloir. Not quite as difficult as the Upper Buttress.
Can be approached from either the upper Linda Glacier or from a subsidiary gully from Bowie Couloir. The upper buttress comprises good rock. Traverse a ridge with gendarmes to join Zurbriggen Ridge.
The full buttress is recommended as a route to the summit.
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(Upper Buttress) Dick Irwin, Hamish MacInnes, Peter Robinson, February 1956
(Lower Buttress) Kobi Bosshard, Fritz Schaumberg, January 1962
Patrick Conaghan, Ron Cox, February 1962
Bill McLeod, Peter Dickson, July 1991