Hellfire Club – Dublin’s haunted ruin

Overview

At 383 metres on Montpelier Hill sits the roofless shell of an 18th-century hunting lodge, built partly from the stones of a Neolithic passage tomb its owner tore down – which is where a good deal of the devilry that gave the place its name is said to begin. Coillte manages it now as a free, open-air site: park at the marked car park, follow forest paths up, and the reward at the top is a barrel-vaulted stone ruin looking out over Dublin city centre, the River Liffey and Dublin Bay. It is one of the most rewarding short walks close to the city – a stiff climb, a real ruin and a view that takes in the whole capital.

History

Ancient roots and Georgian ambition

Long before the lodge appeared, the hilltop was a Neolithic burial site, a passage tomb topped with a cairn of stones. In the early 1720s William ‘Speaker’ Conolly, one of the wealthiest men in Ireland and Speaker of the Irish House of Commons, acquired the estate and had the cairn dismantled, using much of its stone to build his lodge and one ancient standing stone, tradition says, as the lintel over his fireplace. Local legend has it that this is what angered whatever slept on the hill.

The hunting lodge was completed around 1725, built with white-washed walls, granite steps and a slate roof. A storm soon tore the roof away, and Conolly rebuilt it with a barrel-vaulted stone ceiling – still the ruin’s most striking feature. Conolly died in 1729, and the building sat empty for several years until it found its most infamous tenants.

The infamous club

In 1735, the property was leased to a group of wealthy young aristocrats led by Richard Parsons, later the 1st Earl of Rosse. Known locally as the “wild young gentlemen,” they adopted the name Hellfire Club, drawing inspiration from similar English societies founded by Philip Wharton and Francis Dashwood. Their gatherings were reputedly centred on heavy drinking, gambling and theatrical mock religious ceremonies.

Local accounts from the period describe the club’s president dressing as the “King of Hell,” complete with horns, wings and cloven hooves. A vacant chair was supposedly kept for the Devil, and stories circulated of black cats leaping across banquet tables and terrified villagers fleeing the hill after witnessing midnight rituals. Strip away the folklore, though, and the only firmly recorded death tied to the club is a duel: Charles Cobbe, son of the Archbishop of Dublin, was killed here in July 1751. The lodge eventually burned down – records disagree on whether it was an accidental brandy-fuelled fire or deliberate arson by the members themselves – leaving only the stone vault and lower walls standing. Decades on, General Joseph Holt, a leader of the 1798 Rebellion, is said to have spent a night in the roofless ruin while on the run.

Modern legacy

Today the Hellfire Club survives as a cultural landmark rather than a place of scandal. More recently the Hellfire Club Archaeological Project – a joint effort by Abarta Heritage, South Dublin County Council, Coillte and the Dublin Mountains Partnership – has dug into the hill’s deeper past, confirming the Neolithic passage tomb that the lodge was raised on top of. The site has also featured in paranormal broadcasts, including FM104’s live investigation in 2010, and the stone structure stays remarkably intact, a solid link to the years when Dublin’s aristocracy treated these mountains as a private playground.

What to See & Do

• Explore the ruins – The accessible structure spans two levels. The lower chamber contains the original fireplace built from the dismantled Neolithic cairn, while the upper vault opens to a 360° panorama of the capital and surrounding mountains.
• Walk the forest trails – Coillte maintains two marked routes from the car park. The 5.5 km Forest Loop takes roughly 90 minutes; Coillte calls it moderate, but the Dublin Mountains Partnership rates it strenuous, so treat it as the harder option. The 4 km Montpelier Loop is the one most people want – about an hour, gentler, fine for families – and a small frog pond along the clockwise route is a nice surprise on the way up.
• Photography – Early morning light catches the stone vault in warm amber tones, while late afternoon creates strong silhouettes against the city skyline. The surrounding forest provides natural framing for landscape shots.
• Orienteering – Three permanent courses (Beginner, Intermediate, Advanced) are plotted through the estate. Participants can download course maps or use the Irish Orienteering Association app to navigate the terrain.
• Picnic with a view – Flat grassy areas near the car park and along the lower trail offer quiet spots to rest. There are no waste bins on the summit, so visitors should take their rubbish with them.

Practical Information

The Hellfire Club is freely accessible year-round. The car park operates on seasonal hours, and while the ruin itself is open 24 hours, visiting during daylight is strongly advised for safety and better visibility.

Getting there

• By car: The site is about a 30-minute drive south of Dublin city centre via the R115. Follow road signs for “Hellfire Club” – the entrance to the car park is clearly marked on the right.
• By public transport: On Saturdays the Local Link SD4 service now stops right at the Hell Fire Club/Massy’s Estate car park, which is far and away the easiest way up without a car. On other days there is no direct bus: the nearest stop is the 15/15B at Ballycullen Road (Stop 6282), leaving a short taxi ride or a brisk 15-minute uphill walk.
• Walking access: Multiple paths connect the car park to the ruin. The Montpelier Loop offers a steady, well-graded ascent. For a quicker route, a steep gravel track on the right side of the main trail reaches the summit in under ten minutes.

Visitor tips

• The ground is uneven and includes loose gravel and tree roots; sturdy walking shoes with good grip are essential.
• There are no toilets or bins on site, so bring out whatever you bring in. A mobile coffee van works the car park most weekends year-round, not just in summer.
• The car park can close at short notice when Met Éireann forecasts snow or ice, and during a Red wind warning you should stay out of the forest entirely – check before setting off in rough weather.
• Dogs are welcome but must be kept on a short lead, particularly near the ruin and along the main trail where other walkers and cyclists use the path.
• Night visits are technically possible once the car park closes, but the lack of lighting and steep terrain make them impractical for most visitors.

Nearby attractions

The Hellfire Club sits within the wider Dublin Mountains landscape, within easy reach of other walks. A short drive or bus south leads to Ballyboden, the usual starting point for the Dublin Mountains Way, and from there you can carry on to the lakeside trails at Bohernabreena Reservoir. If you want to link two hills in a day, pair the climb here with Massy’s Estate immediately below the car park – the two share the same forest and you can walk between them without moving the car.