Overview
The reason to come to Dartrey is the Dawson Mausoleum: a roofless miniature of the Pantheon, marooned on a wooded island in the middle of a lough. The forest sits a few kilometres south-east of Cootehill near Rockcorry, on the former demesne of the Dawson family, who later held the title Earl of Dartrey; Coillte now runs it as a commercial woodland. The landscape is a chain of loughs linked by the Dromore River, with crannógs and a scatter of Georgian and Victorian stonework through the trees. Recent work has upgraded the waymarked paths and added the Erica’s Fairy Forest play zone for children.
One thing to check before you set out: as of the most recent Coillte update, the forest is open but access is heavily restricted after storm damage. Look at the Coillte site for the current position before travelling, especially if you want the Temple Loop out to the mausoleum.
A Legacy of the Dawson Family
The area’s name traces back to the ancient Kingdom of Dartrey (or Dartraige), a sub-kingdom of the Airgíalla federation that once stretched across much of what is now Monaghan and Louth. By the early 18th century, the Dawson family had established Dawson Grove as their country seat. Thomas Dawson, later raised to the peerage, transformed the landscape into a grand estate, commissioning some of Britain’s finest young architects and sculptors. The house that crowned it, designed by the Scottish architect William Burn in the Jacobethan style, was completed in 1846.
The family’s fortunes waned in the 20th century. The contents of Dartrey House were sold in 1937, the land later passed into State forestry, and the mansion itself was demolished in the mid-20th century – sources differ between 1946 and 1950. Only the stables and fragments of the original farmyard remain today, quietly absorbed into the surrounding woodland.
Key Monuments & Historic Sites
The Dawson Mausoleum (Lady Anne Temple)
Perched on Black Island, a large landmass separating the Inner and Outer Loughs, stands one of Ireland’s most architecturally significant mausolea. Designed by the young James Wyatt around 1770, the roofless structure is a miniature replica of the Pantheon in Rome. It was commissioned by Thomas Dawson to commemorate his first wife, Lady Anne Fermor, who died aged 36. At its centre rests a dramatic marble group depicting a grieving father, their young son and an angel gathered around an urn.
The mausoleum holds no remains today, but the temple remains a poignant monument to loss. After decades of exposure and vandalism, the Dartrey Heritage Association and the Irish Georgian Society have led a careful, phased restoration of the dome, brickwork and interior. The island is reached via the historic Iron Bridge, which spans the water to the western shore.
St John’s Church
Overlooking the Inner Lough and Black Island lies the Church of St John the Evangelist, often called Dartrey Church. Originally built in the late 1720s or early 1730s, this neo-Gothic stone church was extensively remodelled throughout the 19th century, gaining pointed arches, lancet windows and buttressed corners. Unlike many estate churches that fell into ruin, St John’s remains an active Church of Ireland parish, continuing its role as a community focal point within the woodland.
The Dawson Monument & Famine Wall
Just outside the main forest gate along the R188 stands the Dawson Monument, a neo-Classical column erected around 1810. Also designed by James Wyatt, it serves as a roadside landmark marking the boundary of the former demesne. Approaching the estate from Cootehill, visitors will notice the Famine Wall, a low stone boundary that runs halfway along the road to Rockcorry. This quiet reminder of the Great Famine period underscores how the landscape witnessed both aristocratic ambition and the profound social upheavals of the 19th century.
Walking & Family Activities
Coillte maintains three waymarked loops, which between them cater for most abilities:
- Fairfield Loop – about 2 km, easy, green markers.
- Deer Park Loop – about 5 km, moderate, blue markers.
- Temple Loop – about 7 km, moderate, red markers, taking in the Dawson Mausoleum.
The paths wind through mature planting and along the river and loughs, and recent work has upgraded several of them. The Erica’s Fairy Forest play zone is the draw for children, with custom play equipment built to sit within the woodland. The loughs and riverbanks are good for birdwatching, and the monuments give the routes a series of waypoints. Bear the access restrictions above in mind, though – not every trail may be open.
Practical Information
- Access & Parking: Free parking at the forest car park. From Cootehill, follow the R188 past the Dawson Monument; the car park is about 1.5 km further on, on the right-hand side.
- Opening Hours: Open year-round, but access is currently restricted by storm damage – check the Coillte site before travelling.
- Admission: Free entry.
- Facilities: Basic picnic areas and seating are scattered along the main trails. There are no on-site cafes or retail facilities, so visitors are advised to bring their own refreshments.
- Getting There: Dartrey Forest sits just south-east of Cootehill, about 15 minutes’ drive from Cavan town and easily reached from the R188. The nearby village of Rockcorry has shops and other local amenities.
- Tips: Wear sturdy footwear, as some sections near the loughs and the causeway to Black Island can be uneven or damp after rain. The Iron Bridge and boardwalk areas are best navigated with care. For those interested in the broader heritage of the region, the estate sits within easy reach of other Monaghan landmarks, including the Cassandra Hand Folk & Famine Centre and Rockcorry Village and Castle Ruins.