Overview
The Dublin Mountains form the Dublin-side extension of the Wicklow Mountains, a granite-capped upland that shapes the south-eastern horizon of the capital. Though the broader range spills into neighbouring counties, the section within County Dublin carries its own local name: Sléibhte Bhaile Átha Cliath. Covering roughly 43 km of marked trails, mixed forest and open heath, the area functions as a natural playground just eight kilometres from the city centre.
The network is anchored by the Dublin Mountains Way (DMW), a 42.6 km long-distance route linking Shankill to Tallaght, but the mountains also hold a patchwork of shorter loops, historic roads and adventure parks. If you only have half a day, the Hellfire Club loop gives you the best view for the least effort; for a longer walk, the Fairy Castle cairn on Three Rock is the natural target. One thing to set expectations: much of this is working Coillte plantation, so you will pass through blocks of Sitka spruce and the occasional clear-felled hillside rather than untouched wilderness.
History & Heritage
Human activity in the mountains stretches back to the Neolithic period. Passage tombs sit on summits like Seefin and Seefingan, forming part of Ireland’s earliest ceremonial landscapes. By the 6th century, Saint Kevin had established the monastic settlement at Glendalough, just north of the Dublin foothills, cementing the wider region’s role in early Irish Christianity.
The rugged terrain later proved strategically valuable. During the Norman invasion of 1170, the high passes offered a route for Strongbow’s forces. Centuries later, the Gaelic O’Byrne and O’Toole clans used the same crags and valleys to wage guerrilla campaigns against English settlers. The 1798 Rebellion saw Irish rebels retreat into the hills, prompting the British administration to commission the Wicklow Military Road (1800–1809). Running from Rathfarnham through the Sally Gap and into the Dublin Mountains, the road remains a popular walking corridor today.
The Dublin Mountains Partnership (DMP) was set up in May 2008 to coordinate trail maintenance, wildlife protection and outdoor recreation, and it opened the Dublin Mountains Way on 31 October 2010. Its current Strategic Plan (2022–2026) focuses on sustainable access, path upgrades and community engagement.
Walking the Trails
Dublin Mountains Way
The DMW is the flagship route, graded Strenuous and waymarked with the standard yellow walking-man symbol. It divides into logical stages that can be tackled individually or strung together as a multi-day challenge.
Key stages and highlights include:
- Shankill to The Scalp (6 km one way, Moderate): Passes Rathmichael Wood and Carrickgollogan before reaching the limestone escarpment at Barnaslingan, with clear sightlines across Dublin Bay.
- The Scalp to Cruagh (Strenuous): The longest and most demanding section. Walkers climb through forest tracks to Three Rock Mountain and Fairy Castle, at 537 m the highest point on the whole route, where a cairn caps a passage tomb.
- Cruagh to Glenasmole (6 km, Moderate): Descends past the historic Bohernabreena Reservoirs (built in 1887) and follows the River Dodder.
- Glenasmole to Tallaght (6 km, Moderate): A gentle finish through the protected Glenasmole Valley, ending near Sean Walsh Memorial Park.
The route is free to walk, dog-friendly (on a lead), and fully waymarked. Some sections follow minor roads, so extra caution is advised at crossings.
Shorter Loops & Family Routes
Not every visit requires a full day. The DMP maintains several shorter circuits that are ideal for families or those with tighter schedules:
- Hellfire Club Loop (Montpelier Hill): A 4 km moderate walk to the ruined 18th-century hunting lodge, historically linked to early Freemason gatherings.
- Ticknock Fairy Castle Loop: Around 8 km through Japanese larch and Sitka spruce forest, climbing to the Fairy Castle cairn on Three Rock Mountain.
- Shankill to The Scalp: A straightforward 6 km one-way route from the village, perfect for a lunchtime hike with a reward at the viewpoint.
- Glenasmole & Tallaght Stage: An easy 6 km riverside walk through wetland and woodland, where you can spot swans, moorhens and otter tracks.
All routes use the same black-and-yellow waymarking system and are accessible via public transport.
Adventure & Outdoor Activities
Beyond walking, the mountains support a range of structured outdoor activities:
- Mountain Biking: Designated single-track routes wind through Ticknock, Tibradden and the Massy’s Estate forest.
- Glencullen Adventure Park (The Gap): A dedicated mountain-bike park above Glencullen with graded downhill trails; parking costs €2 a day.
- Orienteering: The DMP maintains several courses across the estate, regularly used by schools and local clubs.
Wildlife & Landscape
The land shifts from blanket bog and heath on the higher ground to mixed plantation and native woodland in the valleys. The forested zones are mostly Sitka spruce, Japanese larch and Scots pine, with pockets of native birch, while the open tops carry heather, bilberry and purple moor-grass that colour the ridges rust and purple in late summer. Deer descended from the old Powerscourt herd roam the higher forest, and it is worth keeping an eye out for red squirrels and mountain hare.
Getting There & Practical Tips
Access Points
- Shankill (East terminus): Take the DART to Shankill Station, then walk 15 minutes to Brady’s of Shankill, where the trailhead begins. The E1 bus also stops opposite the pub.
- Ticknock: Catch the Green Luas to Dundrum, then transfer to the 44b bus (weekday service) to Ballinteer. There is a car park off the R113 (occasionally closed for resurfacing, so check ahead).
- Tallaght (West terminus): The Red Luas to Tallafield puts you within walking distance of Sean Walsh Memorial Park.
- Ballyboden: The suburb of Ballyboden provides road access and a small car park for southern DMW sections.
Facilities & Safety
- Parking varies by trailhead: the Hell Fire Club car park is free, the Shankill DART station car park costs about €3 a day, the Glencullen Adventure Park charges €2, and Tallaght parking is fee-paying. The Carrickgollogan and Hell Fire Club car parks open 07:00–21:00 in summer and 07:00–17:00 in winter.
- Refreshments are limited on the hill itself; Johnnie Fox’s pub in Glencullen is the reliable stop for food and a pint.
- None of the sites are wheelchair accessible, owing to the natural gradients.
The DMW is managed by the Dublin Mountains Partnership. For route updates or trail closures, email info@dublinmountains.ie. Woodland tracks like Barnaslingan Wood may be rerouted after heavy rain, and winter conditions can make higher sections icy. Sturdy boots and a waterproof layer are strongly recommended. Dogs must remain on a lead across the entire network, and walkers are asked to follow Leave No Trace principles: take litter home, stay on marked paths and give livestock space.
Official overview maps are available as PDFs from the DMP website, and the OS Discovery Series Sheet 50 covers the area comprehensively. For those wanting to give back, the DMP runs a Volunteer Ranger programme for trail maintenance, litter picking and signage work.
Start your hike early from Shankill to beat the midday crowds, and keep an eye on the weather forecast before heading up to Three Rock or The Scalp, where wind speeds and visibility can change quickly.
