Slieve Foye, Carlingford, Co Louth
Slieve Foye, Carlingford, Co Louth Courtesy Bernice Naughton

Slieve Foy and Cooley Mountains Overview

📍 Cooley Peninsula, Louth

🏛️ Attraction

Last updated: 28 April 2026

Overview

King John's Castle, Harbour & Mountain, Carlingford, Co Louth
King John's Castle, Harbour & Mountain, Carlingford, Co Louth © Tourism Ireland

Slieve Foy (Irish: Sliabh Feá – “mountain of the woods”) is the highest summit of the Cooley Mountains and County Louth, rising to 589 m. Its elongated ridge runs northwest‑southeast, punctuated by subsidiary tops such as The Foxes Rock, The Ravens Rock, The Eagles Rock and Barnavave. From the summit visitors can sweep their gaze north across Carlingford Lough, east to the Mourne Mountains, west over the Cooley hills and, on a clear day, spot the distant silhouette of the Isle of Man. The lower slopes are cloaked in the Coillte‑managed Slieve Foy Woods, a mixed‑species forest that provides easy access, picnic facilities and a network of sign‑posted walking routes.

History & Legend

The mountain is steeped in Irish mythology. Its profile is said to resemble a sleeping Finn McCool, the giant of the Táin Bó Cúailnge, who battled the winter spirit Ruscaire by hurling a massive stone that became the famous Cloughmore on Slieve Martin. A parallel tale credits the hero Fionn Mac Cumhaill with throwing the same boulder from Slieve Foy during a contest with a rival giant from the Mournes. The epic also records Queen Medb’s army cutting a pass through the range, now known as Barnavave (“Maeve’s Gap”).

In the mid‑20th century the forest on the mountain’s lower slopes was planted as part of a national re‑forestation programme, and today Coillte’s stewardship ensures a sustainable habitat for wildlife. In 2009 the area gained protection under the EU Habitats Directive as a “Designated Area of Protection for Flora, Fauna, Wild Animals and Little People”, a whimsical nod to the leprechaun hunts that have taken place on the slopes since 1989.

What to See & Do

Walking Trails

  • Táin Way – a national long‑distance route that threads through the Cooley Mountains; a 4 km section runs inside Slieve Foy Woods.
  • Colour‑coded loops radiating from the forest trail:
    LoopLengthMarker
    Commons Loop3 kmGreen
    Slieve Foy Loop8 km (≈9 km in Source 1)Blue
    Barnavave Loop12.5 kmRed
    Each loop is clearly sign‑posted, ranging from gentle woodland strolls to demanding hill‑top treks. The Slieve Foy Loop ascends from the Windy Gap, climbs about 270 m, and rewards walkers with uninterrupted panoramas of Carlingford Lough, the Mournes and, when visibility permits, the Isle of Man.
Hiking in the Cooley Mountains
Hiking, Cooley Mountains, Co Louth Courtesy Boyne Valley Trails Group

Guided Experiences

  • Mountain Ways Ireland offers a guided hike along the distinctive gabbro ridge, culminating at the summit and optionally descending via the “Devil’s Ladder”, a narrow scramble that adds a dash of excitement before returning to Carlingford for refreshments.

Geology, Flora & Fauna

The ridge is composed of ancient gabbro, a dark coarse‑grained igneous rock that supports rare lichens and alpine‑type plants. The protected status safeguards red‑listed species such as the Irish hare and peregrine falcon, which are occasionally sighted soaring above the summit. Red‑listed plants like the alpine saxifrage also thrive on the higher, exposed sections.

Scenic Drive & Picnic

The R173 coastal road, linking Carlingford to Omeath and on towards Newry, offers one of Ireland’s most picturesque drives with frequent pull‑outs for photo‑ops of sea, cliffs and distant peaks. Two free car parks at the forest entrance provide picnic tables and ample space for families.

Getting There

  • By Car: The main trailheads are accessed via the R173 from Carlingford. Parking is free at the forest entrance and at the Windy Gap car park (limited spaces). A short, well‑marked lane leads to the trailhead for the Slieve Foy Loop.
  • Public Transport: Bus Éireann route 161 runs between Dundalk and Carlingford, stopping within walking distance of the forest car park. From Carlingford village a local shuttle or taxi can take you to the trailhead.
  • Dog Friendly: Dogs are permitted on the forest trails and loops, provided they are kept under control and on a lead in the more exposed sections.

Nearby Attractions

While exploring Slieve Foy, consider adding these nearby highlights to your itinerary:

  • Carlingford Castle – the well‑preserved King John’s Castle overlooking Carlingford Lough.
  • Cooley Peninsula Scenic Route – a 30 km drive that showcases coastal villages, historic sites and dramatic sea‑cliffs.
  • Cooley Distillery – Ireland’s first legal whiskey distillery, offering tours and tastings.
  • Mellifont Abbey – the first Cistercian abbey in Ireland, a short drive inland from the peninsula.
  • An Táin Arts Centre – cultural hub in Carlingford with exhibitions and performances.

Practical Information

  • Access: Trailheads are reached via the R173 from Carlingford. Parking is available at the forest entrance (free) and at the Windy Gap car park (limited spaces).
  • Difficulty: The Slieve Foy Loop is strenuous (≈9 km, 2½ h) with a steep initial ascent and a short boggy section. The Barnavave Loop is longer and more demanding, suitable for experienced hikers.
  • Best time to visit: Late spring to early autumn offers the most reliable weather and the fullest display of wildflowers. Summer brings the greatest chance of clear views of the Isle of Man.
  • Safety: Weather can change rapidly on the ridge; sturdy footwear, waterproof clothing and a map or GPS are essential. The “Devil’s Ladder” scramble should only be attempted in dry conditions.
  • Facilities: Restrooms are available at the Carlingford village centre and at the forest car parks. Local cafés in Carlingford provide refreshments after a hike.

Slieve Foy and the surrounding Cooley Mountains combine dramatic geology, rich mythology and well‑maintained trails, making them a standout destination for anyone seeking the wild beauty of Ireland’s east coast.