Overview
The Bluestack Mountains – also known as the Croaghgorms – form a striking granite barrier across the south of County Donegal, Ireland. Rising to 674 m at Croaghgorm, the range stretches from the Barnesmore Gap, separating Donegal Town and Ballyshannon from the northern towns of Dungloe and Letterkenny. Its rounded silhouettes dominate the horizon, while the Silver Hill (600 m) holds the title of the smallest Irish peak to meet the Simms classification. The landscape alternates between gentle foothills, boggy moorland and dramatic river valleys, making it a haven for walkers, photographers and nature lovers.
History & Background
Geologically the Bluestacks are the product of a violent clash between massive ice sheets and ancient granite bedrock about 12,000 years ago. The glaciers smoothed some surfaces while the hard granite resisted, leaving sheer boulders, scraped pavements and deep corries that still scar the hills. The Irish name Croaghgorm – “the blue mountain” – refers to the violet hue the peaks take on at sunrise and sunset.
Historically the range acted as a natural defence line, separating the southern settlements of Donegal Town and Ballyshannon from the northern Gaeltacht areas. The Barnesmore Gap has long been the main trade route through the mountains. Scattered across the plateau are remnants of early Christian habitation, most notably the mountain graveyard at Disert, a solitary burial site that adds a mystical touch to the landscape. Local folklore speaks of wandering spirits and hidden fairy forts, enriching the sense of place.
The Bluestack Way itself was conceived by the Bluestack Environmental Group and opened in 2000, funded by the EU Peace and Reconciliation Fund and built by workers on a FÁS Community Employment Scheme. In 2010 the trail was upgraded to the National Long Distance Trail standard and is slated for inclusion in the Irish leg of the International Appalachian Trail. The route is listed on the official Sport Ireland trail portal.
What to See & Do
Summit Highlights
- Croaghgorm (674 m) – the highest point offers panoramic views that on a clear day span six Irish counties. The summit is a rewarding, though demanding, finish for any loop walk.
- Silver Hill (600 m) – a modest climb that still provides excellent vistas of the surrounding valleys and is notable for its Simms classification.
Lakes & Waterways
- Lough Belshade – a remote jewel on the western flank of Croaghgorm, its mirror‑still surface reflects the surrounding granite.
- Lough Eske – a deep, calm lake at the foot of the range, popular for fishing and for the scenic road that hugs its shoreline. The lake supports salmon, freshwater pearl mussel and petrifying springs.
Wildlife & Wilderness
- Golden eagles soaring over the ridges.
- Red deer stags rutting on the autumn bogs.
- Otters in the rivers and red squirrels darting through hazel thickets.
The Bluestack Way (65 km / ~3 days)
| Section | Highlights |
|---|---|
| Donegal Town → Lough Eske | Lakeside scenery, conservation area with salmon and pearl mussel, optional 5.5 km detour around Loch Iascaigh |
| Lough Eske → Disert | Foothills, the ancient mountain graveyard at Disert, panoramic ridge walks |
| Disert → Ardara | Rolling moorland, sweeping views of the western Donegal coastline, arrival at The Diamond in Ardara |
The trail is way‑marked with a yellow arrow on a black background, divided into six sections each linked to an OS Discovery Series map sheet. Dogs are not permitted on private‑land sections, the first of which begins at Owenboy when heading north from Donegal Town.
Getting There & Transport
- By Car: The trailheads are easily reached via the N13 (Donegal Town) and the N15 (Ardara). Both start points have free roadside parking.
- Public Transport: Bus Éireann routes 480 (Donegal Town – Letterkenny) and 490 (Donegal Town – Ardara) stop within walking distance of the trailheads. Check the latest timetables as services are limited on Sundays.
- Air: Donegal Airport (CFN) lies about 30 km north of the trail; the nearest major airport is Derry (LDY), 70 km away.
Seasonal Tips & Weather
The Bluestack Way is usable year‑round, but the best conditions are from late May to early October when daylight is long and the mountain passes are less likely to be snow‑bound. Autumn brings spectacular colour and rutting red deer, while winter can bring icy sections and reduced visibility. Pack waterproof clothing, a map, and a compass regardless of season.
Practical Information
- Length & Difficulty: 65 km (officially 64.1 km), graded moderate, typically completed in three days.
- Start / Finish: Begins at The Diamond in Donegal Town and ends at The Diamond in Ardara.
- Waymarking: Yellow arrow on black background; sections are clearly signposted.
- Maps & Resources: OS Discovery Series 1:30 000 maps (Sheets 1, 2, 3) and the official Sport Ireland trail page provide detailed route information.
- Accommodation: B&Bs and guesthouses are available in Donegal Town, Ardara and along the Lough Eske corridor. Camping is permitted at designated sites near Lough Eske.
- Facilities: Public toilets at The Diamond (Donegal Town) and in Ardara; water sources are plentiful near the lakes but carry enough for each day’s walk.
- Dog Access: Dogs are allowed on public‑land sections but must be kept on a leash on private‑land stretches.
- Fees: No entry fee for the trail; parking is free at both trailheads.
Nearby Attractions
- Ardara Heritage Centre – a short walk from the Ardara trailhead, showcasing local crafts and history.
- Glenveagh National Park – a 30‑minute drive north, offering additional walking routes and the historic Glenveagh Castle.
- The Diamond (Donegal Town & Ardara) – historic market squares perfect for a post‑walk meal.
Whether tackling the full Bluestack Way or simply exploring a summit or two, the Bluestack Mountains offer a blend of dramatic geology, rich history and vibrant wildlife that epitomises the wild heart of Donegal.