The Glenfinnan Viaduct is a curved, 21-arch concrete railway viaduct on the West Highland Line between Fort William and Mallaig, completed in 1901 by Robert McAlpine. It became world-famous as the bridge the Hogwarts Express crosses in the Harry Potter films, and each summer more than 600,000 visitors come to watch the 'Jacobite' steam train traverse it. The 2026 season started later than usual after West Coast Railways settled a central-door-locking (CDL) arrangement with the rail regulator, but the train is now running; the viaduct itself is free to walk to and view year-round. Time your visit to a scheduled crossing to see the steam train on the arches.
The sweeping curve of 21 semicircular arches following the valley — best seen whole from the hillside viewpoint behind the visitor centre
The Jacobite steam train crossing under a plume of white smoke (summer only, usually late morning, running slowly)
The panoramic viewpoint about 120 m up the hill, taking in both the viaduct and the Glenfinnan Monument
Loch Shiel and the Monument, marking where the 1745 Jacobite Rising was launched
The mass-concrete structure itself — one of the largest concrete engineering works of its era (completed 1901)
Good to know
SafetyNever climb onto the track or the viaduct. Trains approach quietly from either direction and cannot stop quickly; Network Rail has issued 'danger to life' warnings and British Transport Police enforce against trespass (text 61016). View only from the marked trail and viewpoints.
SeasonSteam-train runs are concentrated in the roughly June–October summer season, with no trains in winter. The viaduct is open all year, but Highland weather is changeable — bring waterproofs and sturdy footwear, and pack midge repellent in summer.
RulesThe Jacobite sells return tickets only and sells out well ahead in peak season; you must pre-book to ride, and fares, times and whether it is running should be checked for the latest information. If you only want to watch the train, no ticket is needed — just walk to the viewpoint.
MannersIn peak season both the National Trust car park (paid) and the nearby community car park fill by around 09:00; verge parking is illegal and cars are towed. Arrive early or use public transport (train/bus from Fort William), and share the popular photo spots with other visitors.
CautionBuy tickets only through West Coast Railways' official channels. Beware unofficial resale sites charging inflated prices, and offers that pass off the ordinary ScotRail service train as the steam train.
Practical info
The visitor hub is the National Trust for Scotland visitor centre, about 1.2 km (a 15–20 min walk) on an unpaved traffic-free path to the viaduct viewpoint. The nearest station is Glenfinnan on the West Highland Line, reachable by ScotRail service train from Fort William. Opening hours for the centre and café, parking fees (currently about £5/day, free for members) and the steam-train times and fares change, so check the latest before you go.
On-site reviews📍 Verified on-site
No reviews yet. If you are here, be the first to leave one.
