It runs from Banavie Junction (New) on the Banavie Pier branch of the West Highland Railway to Mallaig.
The previous "Banavie Junction" closer to Fort William was renamed "Mallaig Junction" upon opening of the Mallaig Extension Railway.
The railway received Royal Assent on 31 July 1894.
It is famous for the concrete structures built along the line by Sir Robert McAlpine, the most notable of which is Glenfinnan Viaduct.
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