Overview
Mullaghcarn (Irish Mullach Cairn, “peak of the cairns”) is the most southerly summit of the Sperrin range, standing at 542 m (1,778 ft). It sits on the edge of Gortin Glen Forest Park in the Fermanagh and Omagh District Council area, roughly 8 km north‑east of Omagh and 5 km 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 the red grouse frequents the heathland, making the area a modest 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 (AONB) means the landscape is protected, preserving both its wild character and its cultural layers.
A trig pillar and a handful of 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 and early modern history
The name Mullach Cairn refers to cairns that once crowned the summit; none survive today, but 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 after the Flight of the Earls in 1607 (Britannica).
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 otherwise natural setting.
Cairn Sunday tradition
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 sculpture
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, commissioned in recent years, 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 the 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 (DAERA).
Hiking the Summit
Popular routes (Komoot)
| Route | Distance | Estimated Time | Elevation Gain | Difficulty |
|---|---|---|---|---|
| Gortin Glen Forest Park via Mullaghcarn – Sperrins | 5.59 mi | 2 h 47 min | 1,150 ft | Moderate |
| Mullaghcarn from Glenpark Road | 4.11 mi | 2 h 02 min | 825 ft | Moderate |
| Gravel Path to Mullaghcarn – Darach the Guardian Sculpture loop from Tirmurty Hill | 4.84 mi | 2 h 30 min | 1,125 ft | Moderate |
All three routes are well‑signposted, suitable for walkers with a reasonable level of fitness, and lead to the same summit viewpoint. The Glenpark Road route passes the striking “Darach the Guardian” sculpture, a large wooden figure that adds a cultural touch to the walk.
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 3 km. It provides a quicker, mostly vehicular access to the summit for those with limited time or mobility; the road is also used by maintenance crews for the telecom masts. 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 (grid reference H 494 842). From here 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. This route is favoured by local hill‑walkers seeking a less trodden approach.
Mullaghcarn and Gortin Forest Walk
For those seeking a longer, varied experience, the 12.4 km Mullaghcarn and Gortin Forest Walk combines woodland, open mountain, and a secondary summit (Slieveard). The trail gains 716 m 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 of Mullaghcarn. After a brief rest, the route continues southwest toward Slieveard, offering additional vistas before looping back through the forest to the trailhead.
The walk is classified as a “lollipop” route (out‑and‑back with a loop) and is marked with average signage. Crowd levels are moderate, and the trail is open year‑round. Pets are permitted on a leash, and the walk is deemed suitable for older children, making it a solid family outing when the group is comfortable with moderate hill walking.
Events
Mullaghcarn Giant (trail race)
The Mullaghcarn Giant is an annual mountain‑running event organised by Carmen Runners. It forms part of the IMRA Ulster Championships and the NIMRA League.
2025 edition – 26 July 2025, start time 12:00 pm from the Gortin Glens car park. Entry fee £12 (affiliated) / £14 (un‑affiliated). Minimum age 17. The 12 km course covers 500 m of ascent and includes boggy sections; trail shoes are strongly recommended. Participants must carry Level B mandatory kit (waterproof jacket, hat or buff, gloves, whistle, charged mobile phone and an emergency blanket or bivvy). GPS devices are not permitted.
2026 edition – 25 July 2026, same start location and format. The race route is fully marked, with marshals stationed along the way. Timing is via SPORTident SI cards.
Further details and entry registration are available on the Athletics NI fixture page and the NIMRA event page.
WalkNI award
In the 2023 WalkNI Awards the Mullaghcarn Trail to the Giant was voted the best trail in the Fermanagh and Omagh area and received the overall “Premiere New Trail” accolade. The award highlights the trail’s blend of forested walks, open mountain scenery and the striking “Giant” viewpoint at the summit.
Wildlife & Landscape
While on the ascent, walkers will encounter acid grassland, patches of heather and, on the western slopes, a managed conifer plantation. The red grouse is a regular sight on the heath, and the 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 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 and provides space for several vehicles. 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 restrooms and a small café during the summer months (generally May‑September). No admission fee is required for any of the walks.
Navigation – GPS coordinates for the summit are 54.67431, ‑7.20942. Interactive maps are available on Komoot and via the 10Adventures route guide. Both platforms allow you to download GPX files or use the “Take Me There” link for turn‑by‑turn directions.
Seasonality – The routes are open year‑round. The longer forest walk is popular throughout the year, while the summit routes see the highest usage from January through August, according to Komoot traffic data. Weather can change quickly; waterproof clothing and sturdy footwear are advised.
Safety – The terrain is steep in places, with rocky sections near the summit. Stay on the defined paths to protect the fragile heathland and avoid disturbing the ASSI’s sensitive habitats. Litter must be taken back to the car park.
Dog‑friendly – Dogs are welcome on all routes provided they are kept on a leash.
Nearby attractions – While in the area, visitors often combine Mullaghcarn with other Sperrin highlights such as the Darach the Guardian sculpture, the waterfalls within Gortin Glen Forest Park, Oak Lough, the historic town of Gortin, and neighbouring summits Bessy Bell(/bessy-bell/) and Dart Mountain(/dart-mountain/).
Mullaghcarn offers a compact yet richly rewarding mountain experience: a blend of natural beauty, subtle historic intrigue, and a selection of well‑maintained trails that cater to families, casual walkers and seasoned hikers alike.