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Innocent Railway Tunnel, Edinburgh

Explore Scotland’s oldest railway tunnel, a historic horse-drawn coal route transformed into a vibrant urban walking and cycling path in Edinburgh.

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The Innocent Railway Tunnel in Edinburgh is Scotland’s earliest railway tunnel, built between 1827 and 1831 to transport coal from Midlothian pits into the city. Originally a horse-drawn tramway with a rope-hauled incline, the 566-yard tunnel is lined with Craigleith sandstone and now serves as a popular walking and cycling path, part of the UK’s National Cycle Route 1.

A brief summary to Innocent Railway Tunnel

  • Innocent Railway, Edinburgh, GB
  • Duration: 0.5 to 2 hours
  • Free
  • Environment icon Outdoor
  • Mobile reception: 4 out of 5

Local tips

  • Visit during daylight for safer navigation; bring a light if exploring after dark as tunnel lighting is intermittent.
  • Wear comfortable shoes suitable for cycling or walking on uneven surfaces inside the tunnel.
  • Look out for the colorful graffiti art along the tunnel walls, which adds a modern artistic touch.
  • Combine your visit with a stop at nearby Holyrood Distillery for a taste of local gin and whisky.
  • Be mindful of occasional event closures, such as marathons, which may restrict access temporarily.
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Getting There

  • Public Bus

    Take Lothian Buses routes 24 or 34 from Edinburgh city center to the St. Leonard's area; journey time is approximately 20-30 minutes. Buses run frequently throughout the day with fares around £1.80-£2.00 GBP. The tunnel entrance is a short walk from the nearest stop. Accessibility may vary depending on bus model.

  • Cycling

    Cycle from central Edinburgh via National Cycle Route 1, which includes dedicated paths and quiet roads. The ride typically takes 15-25 minutes depending on your pace. The route is mostly flat but includes the tunnel’s 1-in-30 incline. Suitable for most cyclists with basic fitness.

  • Taxi or Rideshare

    A taxi or rideshare from Edinburgh city center to the Innocent Railway Tunnel entrance takes about 10-15 minutes depending on traffic. Estimated fare ranges from £8 to £12 GBP. This option is convenient for those with limited mobility or traveling in groups.

  • Walking

    Walking from Edinburgh city center to the tunnel entrance takes approximately 45-60 minutes over mostly urban terrain with some gentle inclines. The path is accessible but includes street crossings and uneven pavements. Suitable for those comfortable with longer urban walks.

Innocent Railway Tunnel location weather suitability

  • Weather icon Any Weather
  • Weather icon Rain / Wet Weather
  • Weather icon Clear Skies
  • Weather icon Mild Temperatures

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Discover more about Innocent Railway Tunnel

Origins of Edinburgh's First Railway Tunnel

The Innocent Railway Tunnel was constructed between 1827 and 1831 as part of the Edinburgh and Dalkeith Railway, designed by the renowned engineer James Jardine. It was built to connect the coal mines of Midlothian with the city of Edinburgh, facilitating the transport of coal to urban markets and significantly reducing costs. The tunnel stretches 566 yards (518 meters) beneath volcanic rock formations near Holyrood Park, lined with durable Craigleith sandstone. Its construction was a major engineering feat of the early 19th century, costing £12,000, a substantial sum at the time.

The Horse-Drawn Era and the Origin of Its Name

Known affectionately as the "Innocent Railway," the line earned its nickname from its original horse-drawn operation. At a time when steam engines were viewed with suspicion for their speed and perceived dangers, this leisurely tramway was considered safer and more innocent. Despite the name, accidents did occur during its operation, including fatalities. The tunnel featured a steep 1-in-30 gradient, where loaded coal wagons were hauled uphill by a stationary steam engine using a rope system, while horses managed the flatter sections.

Transition to Steam and Industrial Significance

By 1847, steam locomotives replaced horse-drawn wagons, and the rope-haul system was retired. This upgrade allowed trains to run independently through the tunnel, linking Edinburgh to the Waverley Route and beyond. The tunnel and its railway became vital for coal transport and goods movement, supporting Edinburgh’s industrial growth. Passenger services also operated briefly, with a horse-drawn passenger tram introduced in 1832, making it one of Scotland’s earliest passenger railways.

Decline, Closure, and Revival as a Pathway

The railway’s coal depot at St. Leonard’s closed in 1968, leading to the tunnel’s disuse. However, in 1981, the tunnel was unofficially reopened for pedestrians and cyclists, and in 1994 it was fully restored and illuminated by Lothian Regional Council. Today, it forms part of National Cycle Route 1, a long-distance network spanning the UK, and is a cherished urban greenway connecting the city’s south side with Duddingston and Holyrood Park.

Experience and Surroundings Today

The tunnel is permanently lit and accessible 24 hours, offering a unique underground passage lined with graffiti art that adds contemporary character to this historic structure. Its tree-lined approach paths lead past Duddingston Loch, a bird sanctuary, and near the Holyrood Distillery, blending industrial heritage with natural beauty. The tunnel’s atmosphere combines tranquility with a sense of adventure, inviting walkers and cyclists to explore a hidden piece of Edinburgh’s past beneath the city streets.

Architectural and Cultural Legacy

As Scotland’s oldest railway tunnel, the Innocent Railway Tunnel represents a pioneering moment in railway engineering and urban transport history. Its enduring presence reflects the evolution from horse-drawn coal transport to steam-powered railways and now to sustainable urban mobility. The tunnel’s preservation as a public path honors its industrial heritage while providing a scenic and historic route for locals and visitors alike.

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