The mountain was named by Julius von Haast to honour Vicomte d'Archiac (1802–1868), a French geologist and professor of palaeontology at the Paris Museum of Natural History.[6] The Māori name for this mountain is "Kāhuikaupeka" which means "assembly of river heads" as the mountain is the source for several rivers and streams.[5][7]
Climbing
Climbing routes on Mount D'Archiac:
East Ridge – First ascent 1910 by Jim Dennistoun, Laurence Earle, Jack Clarke[8]
North Ridge – Neville Johnson, H.J. Newberry, Ian Powell – (1934)[9]
Trident Glacier / West Ridge – W.H. Scott, P.F. Scully, A. Thompson, Betty Lorimer – (1935)[10]
FitzGerald Stream Route – Bob Unwin, Jack Stanton, Hallam Smith – (1940)[11]
South East Ridge – Jack Pattle, Trevor James, Bernie McClelland, Stan Conway, John Sampson – (1951)[12]
South West Ridge – Graeme Fyfe, Alf and Hunter Dowell, Peter Berry, Margaret Jeffereys – (1953)[13]
The Bandaid Route (South Face) – Bill McLeod, Peter Dickson – (1992)[14]
Desire (South Face) – Ben Ellis, Josh Mitchell, Jack Grinsted – (2018)[15]
Lust (South Face) – Sooji Clarkson, George Loomes – (2020)[16]
Climate
Based on the Köppen climate classification, Mount D'Archiac is located in a marine west coast (Cfb) climate zone, with a tundra climate at the summit.[17] Prevailing westerly winds blow moist air from the Tasman Sea onto the mountains, where the air is forced upward by the mountains (orographic lift), causing moisture to drop in the form of rain or snow. This climate supports the Dennistoun, Trident, FitzGerald, Separation, and South Forbes glaciers on this mountain's slopes. The months of December through February offer the most favourable weather for viewing or climbing this peak.[18]
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