Overview
The Royal Canal is a 225-year-old engineering feat that originally linked Dublin’s River Liffey to the River Shannon. Today, its former towpath has been transformed into the Royal Canal Greenway, a 130 km (81 mi) off-road trail and Ireland’s longest greenway. Completely flat and surfaced, the route is shared by walkers, runners, and cyclists of all ages. It cuts through Dublin, Kildare, Meath, Westmeath, and Longford, connecting vibrant towns like Maynooth, Enfield, Mullingar, and the harbour village of Cloondara.
Along the way, you’ll cross 90 stone bridges, pass 33 working locks, navigate 17 historic harbours, and travel under four aqueducts, including the striking Blackwater Aqueduct. The trail is entirely free to use, making it one of the most accessible outdoor experiences in the country.
A Brief History
Construction began in May 1790 after engineers Thomas Williams and John Cooley mapped a route across north Leinster. Progress was slow, with the canal only reaching Kilcock in 1796 and finally the Shannon in 1817, costing a staggering £1,421,954. For decades, horse-drawn barges and passenger steamers like the Camden and Phelan carried freight and travellers, while the waterway also supplied Dublin’s north city with fresh water via the Blessington Street Basin (opened 1809).
The arrival of the Midland Great Western Railway in the 1840s quickly undermined the canal’s commercial viability. Passenger traffic vanished by the 1880s, and the waterway was officially closed in the 1960s, further restricted by a dam near Mullingar in 1961.
Revival began in the 1970s when the Royal Canal Amenity Group of volunteers started clearing weeds and repairing structures. By 1990, a 74 km stretch from Blanchardstown to Mullingar was navigable again. In 2010, Waterways Ireland reopened the full length to the Shannon, and a €12 million regeneration project converted the towpath into a modern, accessible greenway. The trail’s transformation earned the Excellence Award at the 11th European Greenways Awards.
Route Highlights & What to See
The greenway is easily broken into manageable sections, each with its own character. Most visitors tackle a portion of the route rather than the full 130 km in one go.
Maynooth to Enfield (≈ 20 km)
Starting from the Dublin end, the trail passes Maynooth University’s Gothic campus and the ruins of Maynooth Castle. Further west, you’ll find Kilcock Harbour and Jackson Bridge at Lock 14. This section is heavily used by commuters and families, with several cafés and pubs lining the route.
Enfield to Mullingar (≈ 42 km)
The landscape opens up into farmland and wetlands. Don’t miss the Enfield Fairy Trail, a whimsical stop for children, or the impressive Blackwater Aqueduct. A flight of locks (8–15) marks the railway crossing, where remnants of the old Midland Great Western line still run parallel to the water.
Mullingar to Longford (≈ 47 km)
This central stretch is rich in history and mythology. Visit Belvedere House & Gardens, famous for its “Jealous Wall” designed to block rival views. The route also passes the Hill of Uisneach, one of Ireland’s most ancient ceremonial sites, and the Corlea Trackway Visitor Centre, which showcases a remarkably preserved Iron-Age road dating to 148 BC. Mullingar Harbour serves as a major hub for the Mullingar Blueway, where you can hire kayaks or stand-up paddleboards.
Longford to Cloondara (≈ 15 km)
The final leg winds past Richmond Harbour, known for its colourful moored barges and the historic Richmond Inn. Cloondara marks the official western terminus and acts as a gateway to the wider Shannon Blueway network.
Cultural & Engineering Footnotes
- Hamilton Walk: In 1843, mathematician Sir William Rowan Hamilton discovered the quaternion formula while walking across Broom Bridge. A plaque marks the exact spot.
- The Haunted Lock: The 13th lock at Deey Bridge is locally reputed to be haunted, inspiring poems and even a band.
- Famine Heritage: The canal corridor forms part of the National Famine Way, commemorating the 1847 emigration of 1,490 Roscommon tenants who travelled by boat to Dublin.
Getting There & Practical Tips
Public Transport & Parking The Dublin Suburban Rail line runs from Dublin Connolly to Maynooth roughly every 30 minutes on weekdays, dropping you right at the southern trailhead. Bus Éireann services connect Enfield, Mullingar, and Longford, allowing you to park your car once and cycle or walk between towns. Free or low-cost car parks are available at all major trailheads, with dedicated cycle racks in larger towns.
Bike Hire & Equipment Local hire shops in Maynooth, Enfield, and Mullingar stock hybrid and e-bikes, which are ideal for the flat terrain. If you prefer to walk, the compacted grit-stone surface is fully accessible for wheelchairs and pushchairs. Dogs are welcome but must be kept on a short lead at all times.
Facilities & Safety Picnic spots, public toilets, and water refill points appear roughly every 5–10 km. Larger towns offer full amenities, including bike repair shops, B&Bs, and hotels. Always keep to the right on shared sections, obey lock gate signage, and stay alert for wildlife like otters, herons, and foxes that frequent the canal banks.
Navigation The trail is clearly signposted with distance markers and QR codes that link to downloadable GPX files for your phone or cycling computer. You can also pick up physical route maps at any visitor centre along the way.
Best Time to Visit
- Spring (April–June): Wildflowers line the banks, migratory birds return, and the trail is noticeably quieter than in peak summer.
- Summer (July–August): Expect higher footfall and warmer weather. Many towns host pop-up food stalls and music sessions along the towpath.
- Autumn (September–October): Cooler temperatures and changing foliage make this an excellent window for long rides and photography.
- Winter: The path remains open year-round. With limited daylight, it’s best suited for shorter walks or early morning runs when the waterway is at its most peaceful.
Food & Drink Along the Route
The greenway passes plenty of traditional pubs and cafés. In Enfield, The Bridge House and The Gregory Inn serve classic pub fare. Mullingar offers more contemporary options like Dominik’s Restaurant and Montgomery’s Whiskey Bar. Most towns have a café within walking distance of the trail, so packing a full picnic isn’t strictly necessary, though bringing water and a light snack is always wise for longer stretches.
Planning your route around a specific town like Maynooth or Mullingar makes logistics straightforward. You can easily combine a morning ride with a lunch break in one of the historic harbours, then catch a bus or train back to Dublin or your accommodation. Check Waterways Ireland’s website for current lock maintenance schedules before setting out, as temporary closures occasionally affect navigation.