Pass of Drumochter
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The Pass of Drumochter (Scottish Gaelic: Druim Uachdair) meaning simply 'high ridge' is the main mountain pass between the northern and southern central Scottish Highlands. The A9 road passes through here, as does the Highland Line, the railway between Inverness and the south of Scotland. The Sustrans National Cycle Route 7 between Glasgow and Inverness also runs through the pass.
The pass is the only gap in the main Grampian Watershed suitable for road traffic routes for almost 100 km, between Glencoe (west) and Cairnwell (east); the West Highland Railway is the only other crossing, at Corrour. The pass is a natural low point, where the headwaters of the Spey and Tay penetrate most deeply into the broad Gaick Plateau, with the River Garry flowing south, and the River Truim north. The gap has been shaped into a "U" convenient for a transport corridor by glacial action over successive ice ages, although Loch Ericht just to the west is a much larger glacial breach 
It is the high point on the A9, at 460 m (1508 ft), and in winter can be subject to severe weather conditions. There are routine winter patrols from November to March, and the road is occasionally closed with snow gates near Dalwhinnie and Dalnacardoch. The summit of the railway line is 452 m (1480 ft), making it the highest in the UK. It has been used by the RAF as a training route for low level flying, now less frequently.
It is isolated, and the nearest settlement of any size is the small village of Dalwhinnie, some 10 km (6 mi) to the north.
The summit of the pass marks the boundary between Perth and Kinross and the Highland Council area. A sign at this point says "Welcome to the Highlands/Fàilte don Ghàidhealtachd", although this is the boundary for the authority rather than for the Scottish Highlands which extend south to the geological Highland Boundary Fault at Dunkeld.
- Drummond, Peter; Stewart, Donald William (1991). Scottish Hill and Mountain Names: The Origin and Meaning of the Names of Scotland's Hills and Mountains. Scottish Mountaineering Trust. p. 89. ISBN 9780907521303.
- D. Linton, Watershed breaching by ice, Transactions of the Institute of British Geographers 1949, 15, 1-16
- Hall AM and Jarman D (2004): Quaternary landscape evolution – plateau dissection by glacial breaching. In The Quaternary of the Central Grampian Highlands - Field Guide (edited by S. Lukas, J. Merritt, W. Mitchell). Quaternary Research Association, London, 26-40.
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