It has been described as a crackpot project to run a model train the length of the Great Glen Way by an army of madcap enthusiasts, geeks, and engineers in the best spirit of eccentric Britishness.

On leaving Corpach Double Lock the track followed the south bank of the Caledonian canal for about a mile to a ferry pontoon at Banavie.

Following the north shore of Loch Lochy through some winding and challenging terrain and forest the line finally reached some good ground before just prior to the River Arkaig.

Following nearly ten miles of good fast track the line crossed to the south bank at Laggan Locks over a truss bridge.

The line joined the path of the Invergarry and Fort Augustus Railway through the Loch Oich tunnel and along the shoreline to cross the Calendonian Canal at the Aberchalder Swing Bridge.

Five miles of fast straight track to Fort Augustus ensued including crossing the spectacular Aberchalder Spillway Viaduct.

The Inchnacardon Canyon trestle bridge lead to Inch Mountain which the train ascended by means of a counterbalance railway system.

Tracking the north west side of Loch Ness before rounding the Sron na Muic (snout of the pig) mountain the line descended down into Invermoriston.

The zig-zag on Invermoriston Mountain was overcome by railway winch systems before further running alongside Loch Ness before descending down into Drumnadrochit.

The original rack and pinion system used to ascend Creag Nay was discarded and the trains had to be assisted by means of temporary winches.

Ten further miles mostly along Loch Ness brought the line close to Mac Gruer's Pond where the City of Inverness first came into view.

A suggestion to extrude the track meant 32 tonnes of recycled PVC could be pushed through dies for 40,000 straights and curves which solved the problem economically and effectively and enabled the scheme to pass beyond the idea stage[5] The BLR overcame the obstacles of main line railway swing bridge followed by a road crossing at Banavie by construction and operation of a derrick and train ferry to assist over a water hiatus.

The construction team used Archimedes' principle and a long clear tube filled with fluid to establish a datum height across any two points on the site so a consistent gradient could be calculated.

The resulting structure was a 905 inches (23.0 m) reverse curved wooden swerving trestle bridge which proved even able to support a 65 kilograms (143 lb) man.

Silver Lady negotiated the Bridge successfully with careful driving by Andy though the lack of a parapet could have proved disastrous in the event of a derailment.

At the point the Great Glen Way rejoins the Caledonian Canal on the outskirts of Inverness there was 5 metres (16 ft) near vertical climb in a restricted space.

This was solved by a spiral loop solution matching Silver Lady's 2 ft minimum curve radius and restricting to an 8% maximum gradient.

Little John was the yellow class leader that substituted for Silver Lady while she was undergoing service or when steam support engineers were not available on the longer overnight catch-up runs.

Support staff, needed to keep the project going and the train operational, meant the total number of people involved, excluding local community volunteers, was approximately 171.

[17][18] Only one journey was ever made on The Biggest Little Railway in the World, and while the train experienced delays en-route the final arrival at Inverness Castle was approximately on time.