Overview
Mullaghcarn (Irish Mullach Cairn, “peak of the cairns”) is the most southerly summit of the Sperrin range, standing at 542m (1,778ft). It sits on the edge of Gortin Glen Forest Park, roughly 8km north-east of Omagh and 5km south of the village of Gortin. The mountain’s steep, rocky summit is framed by conifer-planted slopes to the west and acid grassland on the higher ground. Heather blankets the northern slopes, while red grouse frequent the heathland, making the area a quiet haven for bird-watchers.
The summit provides a 360° outlook over the Sperrin Mountains, the rolling drumlin countryside of County Tyrone and, on clear days, distant views of the Antrim coast. Its position on the border of the Sperrin Area of Outstanding Natural Beauty means the landscape is protected, preserving both its wild character and cultural layers. A trig pillar and telecommunications masts sit at the top, marking the highest point of the Mullaghcarn Formation – a bedrock of psammite and semipellite that records the mountain’s ancient geological history.
History & Culture
Ancient cairns and O’Neill lordship
The name Mullach Cairn refers to cairns that once crowned the summit. While none survive today, the stony summit still hints at their former presence. The Sperrin area, including Mullaghcarn, was part of the O’Neill lordship from the 5th to the 16th century, before English rule took hold following the Flight of the Earls in 1607.
WWII firing range
During the Second World War, the mountain was repurposed as a firing range used by the Royal Ulster Constabulary and United States Army units stationed in Northern Ireland. American troops trained here for D-Day, practising with anti-tank weapons, mortars, machine-guns, and rifles. Remnants of the range are no longer visible, but the wartime legacy adds a quiet historic dimension to the natural setting.
Cairn Sunday
The last Sunday in July is designated Cairn Sunday. Historically, locals would climb Mullaghcarn on this day to mark the ancient cairns that once crowned the summit. After a period of decline, the tradition has recently been revived, with families and walkers gathering for a communal ascent and a picnic on the summit.
Darach the Guardian
Along the Glenpark Road route, walkers pass the striking “Darach the Guardian” – a large wooden figure that stands as a cultural landmark within the forest park. The sculpture, created by artist Thomas Dambo, adds a whimsical touch to the walk and is a popular photo spot.
Geology & Landscape
Mullaghcarn is designated an Area of Special Scientific Interest (ASSI) by the Department of Agriculture, Environment and Rural Affairs. The ASSI protects a mosaic of upland habitats – peatland, lakes, and oak-wood (notably Boorin Wood on the north-facing slope) – together with glacial landforms that record the last Ice Age.
The most significant earth-science feature is the Gortin proglacial delta complex, one of the largest and best examples of a proglacial delta assemblage in Northern Ireland. Formed between 17,000 and 13,000 years ago as melt-water from the retreating ice sheet filled the Owenkillew Valley, the delta left a legacy of gravel, sand, and clay deposits that are still visible today.
Hiking the Summit
Popular routes
Mullaghcarn offers several well-signposted approaches suitable for walkers with a reasonable level of fitness:
- Gortin Glen Forest Park via Mullaghcarn: 5.59 miles, approx. 2h 47min, 1,150ft elevation gain. Moderate difficulty.
- Mullaghcarn from Glenpark Road: 4.11 miles, approx. 2h 02min, 825ft elevation gain. Moderate difficulty. This route passes the “Darach the Guardian” sculpture.
- Darach the Guardian Sculpture loop from Tirmurty Hill: 4.84 miles, approx. 2h 30min, 1,125ft elevation gain. Moderate difficulty.
Service-road ascent
A paved service road leaves the B48 at grid reference H 494 830 and winds its way up the mountain for about 3km. It provides quicker, mostly vehicular access to the summit for those with limited time or mobility. Walkers may park at the end of the road and make a short final push to the trig pillar.
Alternative access points
- Oak Lough car park: Located on the east side of the B48. A marked track climbs north-west to the summit, offering a quieter alternative to the main forest-park car park.
- Lenagh townland: A minor road off the B48 provides a lay-by where a rougher path leads onto the ridge, favoured by local hill-walkers seeking a less trodden approach.
Mullaghcarn and Gortin Forest Walk
For a longer, varied experience, the 12.4km Mullaghcarn and Gortin Forest Walk combines woodland, open mountain, and a secondary summit (Slieveard). The trail gains 716m in elevation and typically takes 4–6 hours to complete. Starting from the car park at the end of Scenic Drive in Gortin Glen Forest Park, walkers ascend through dense coniferous stands before breaking out onto the open summit. The route continues southwest toward Slieveard, offering additional vistas before looping back through the forest. This “lollipop” route is marked with average signage and is suitable for older children comfortable with moderate hill walking.
Events
Mullaghcarn Giant Trail Race
The Mullaghcarn Giant is an annual mountain-running event organised by Carmen Runners, forming part of the IMRA Ulster Championships and the NIMRA League.
- 2026 Edition: 25 July 2026, starting at 12:00pm from the Gortin Glens car park.
- Course: 12km with 500m of ascent, including boggy sections. Trail shoes are strongly recommended.
- Requirements: Participants must carry Level B mandatory kit (waterproof jacket, hat/buff, gloves, whistle, charged mobile phone, emergency blanket). GPS devices are not permitted.
WalkNI Award
In the 2023 WalkNI Awards, the Mullaghcarn Trail to the Giant was voted the best trail in the Fermanagh and Omagh area, receiving the overall “Premiere New Trail” accolade for its blend of forested walks, open mountain scenery, and the striking summit viewpoint.
Wildlife & Landscape
On the ascent, walkers will encounter acid grassland, patches of heather, and managed conifer plantations on the western slopes. The red grouse is a regular sight on the heath, while varied plant communities support meadow pipits, buzzards, and a modest array of butterflies and dragonflies around the small upland lakes. Boorin Wood on the north-facing slope provides vital oak-wood habitat within the ASSI.
Practical Information
- Getting there: The most convenient access point is the Gortin Glen Forest Park car park, reachable via the B48 or B46 from Omagh. The car park is free. Alternative parking is available near Oak Lough and at the Lenagh lay-by.
- Visitor centre: The Gortin Glen Forest Park visitor centre, located beside the main car park, offers toilets and a small café during the summer months (generally May–September). No admission fee is required for the walks.
- Navigation: GPS coordinates for the summit are 54.67431, -7.20942. Interactive maps and GPX files are available on Komoot and the 10Adventures route guide.
- Seasonality & Safety: Routes are open year-round. Weather can change quickly, so waterproof clothing and sturdy footwear are advised. The terrain is steep in places, with rocky sections near the summit. Stay on defined paths to protect fragile heathland and avoid disturbing sensitive ASSI habitats.
- Dog-friendly: Dogs are welcome on all routes provided they are kept on a leash.
- Nearby attractions: Combine Mullaghcarn with other Sperrin highlights such as the waterfalls within Gortin Glen Forest Park, Oak Lough, the historic town of Gortin, or neighbouring summits Bessy Bell and Dart Mountain.
For a walk that blends forest shade with open mountain air, Mullaghcarn delivers a compact hike with big rewards, particularly on clear days when the trig pillar offers sweeping views across the Sperrins.