burn on the Mar side of the summit, draining the eastern-slope above it and disappearing below the rocks before it reaches the floor of the valley. Gordon (1925) describes it as falling in a white spray to the Lairig from the northern spur of Ben Mac Dhui. "March has nothing to do with the month of the year, but refers to the old use of the word meaning boundary. The summit of the Lairig Ghru marks the boundary between Deeside (Aberdeenshire) and Strathspey (Inverness-shire). Watson (1975) gives the old name of Allt na Criche (the burn of the boundary), giving the local pronunciation as Creech." Summit Watson gives the summit height as about , and the Cairngorm Tourist Map (1975) gives a spot-height of 2,733 feet. Angus Sinclair Memorial Hut A bothy was built in 1957 by members of the Edinburgh University OTC as a memorial to Dr William Angus Sinclair FRSE, who died on Cairn Gorm on 21 December 1954. The refuge was located near the cross-roads where the tracks from Sron na Lairige and the Chalamain Gap cross the Lairig Ghru. Like many other man-made shelters in the mountains of Scotland that were very accessible from public roads, it was demolished and removed in about 1991. Chalamain Gap This boulder-strewn ravine is used as a route between the Lairig Ghru and Glen More. The name "Chalamain Gap" has been applied relatively recently to this ravine, since in Alexander (1928) the author does not name the gap, but describes it - writing: Watson does not name the ravine "Chalamain Gap" either, but refers to it as the location of the Sinclair Hut: More recently, Diack (2006) gives the name as Eag Coire na Comhdhalack {The Ravine of the Corrie of the Assembly}. Sources Cash, C. G. (July 1901), Cairngorm Club Journal, Number 17, Cairngorm Club, Aberdeen See also Places, place names, and structures on Mar Lodge Estate External links Mountain passes of Scotland Transport in Aberdeenshire Transport in Highland (council area) Badenoch and Strathspey Places and place names on Mar Lodge Estate Marr Cairngorms