Overview
Croaghaun dominates the north‑western tip of Achill Island in County Mayo, rising to 688 m (2,257 ft) and supporting the highest sea cliffs in Ireland. These sheer rock faces are the third‑highest sea cliffs in Europe, after Hornelen in Norway and Cape Enniberg in the Faroe Islands. The cliffs plunge dramatically into the Atlantic, forming a remote, windswept landscape that can only be fully appreciated on foot or from a boat.
The mountain forms part of a dramatic coastal chain that starts south of Keem Bay, sweeps around the uninhabited north‑west of the island, passes Achill Head and Saddle Head, and continues east to Slievemore. The sheer northern slope of Croaghaun is where the cliffs rise, offering unrivalled views of the ocean and the rugged island terrain.
History & Background
While Croaghaun is best known for its natural grandeur, its human history is modest. The area once hosted a coastguard lookout station, now a ruin often referred to as Charles Boycott’s house, perched near the trail. The mountain and its cliffs have long been a landmark for sailors navigating the treacherous Atlantic waters, and the surrounding landscape is protected as a Special Area of Conservation.
What to See & Do
- Cliff vistas – From the summit you can gaze out over the Atlantic, spotting the sheer drop of the cliffs that are nearly three times the height of the famous Cliffs of Moher. The view stretches to the neighbouring Benmore Cliffs, the Atlantic Drive, and the distant islands of the west coast.
- Wildlife – The cliffs host two families of peregrine falcons, best observed in September and October when the young are learning to fly. Marine life is abundant: bottlenose dolphins, basking sharks, porpoises, and occasional sightings of orcas, humpback whales and other cetaceans add a spectacular dimension to the visit.
- Geology – Walkers will notice quartz‑laden metamorphic rocks and patches of Mediterranean‑type heather that thrive on the exposed slopes.
- Historical ruins – The old coastguard lookout provides a sheltered spot for a brief rest and a glimpse into the island’s maritime past.
Seasonal Highlights
The autumn months bring the most active peregrine falcon displays, making September and October the prime time for bird‑watchers. Summer offers the best chance of spotting dolphins and basking sharks in the clear Atlantic waters, while winter can bring dramatic storm‑driven surf that heightens the sense of isolation on the cliffs.
Practical Information
Getting There
The most popular approach is from Keem Bay on the southern side of the mountain. Drive or cycle along the Wild Atlantic Way to the Keem Bay car park. Two car parks are available:
| Parking option | Details |
|---|---|
| Lower Car Park | Closest to the trailhead; often fills quickly in summer. |
| Upper Car Park | Slightly farther uphill; a short, scenic walk down to the start of the path. |
| Corrymore Lake Car Park | An alternative when Keem Bay spaces are full; a pleasant walk from the lake leads to the trail. |
A public toilet is located just above the Keem Bay car park, providing a convenient stop before the ascent.
The Hike
The standard route from Keem Bay to the Croaghaun cliff viewpoint is about 5 km round‑trip and typically takes 2–3 hours depending on pace. The trail is classified as strenuous with three notably steep sections, especially the initial climb from the beach and the ascent past the old lookout. The path can become very slippery on wet grass and boggy after rain, so sturdy walking boots are advisable.
Key waypoints along the route:
- Start at Keem Bay – Follow the marked trail up the hill; the first segment is steep and may be slick when the ground is wet.
- Coastguard lookout ruins – A short detour to the historic building offers a panoramic view of Keem Bay and a safe place to catch your breath.
- Benmore Cliffs viewpoint – Often mistaken for Croaghaun’s cliffs, this spot provides a striking perspective of the sheer rock faces.
- Croaghaun Cliffs viewpoint – After a brief descent and a final incline, you reach the main viewpoint where the 688 m cliffs dominate the horizon.
- Return – The final leg back to Keem Bay is relatively flat but can be boggy; the descent offers ample opportunities for photography.
Safety Notes
- The trail runs close to the cliff edge at several points; keep a wide berth from the drop.
- The summit area is exposed and can become very windy; maintain caution, especially when navigating narrow sections.
- Fog and mist can develop rapidly, reducing visibility. Carry a map and compass, and be prepared to turn back if conditions deteriorate.
Accessibility
The route involves steep, uneven and boggy sections and is not suitable for wheelchair users or those with limited mobility.
Visitor Details
| Feature | Details |
|---|---|
| Height of cliffs | 688 m (2,257 ft) |
| Trail length | ~5 km (round‑trip) |
| Estimated time | 2–3 hours |
| Difficulty | Strenuous, steep sections |
| Parking | Keem Bay lower & upper car parks; alternative at Corrymore Lake |
| Admission | Free |
No formal opening hours apply; the site is accessible year‑round. For up‑to‑date weather and tide information, consult the Met Éireann website or local tourist offices.
Nearby Natural Areas
A short drive inland brings you to Ballycroy National Park, Ireland’s first designated national park, where forest walks, peatland scenery and additional wildlife spotting opportunities complement a day spent on the cliffs.
Nearby Attractions
Achill Island offers a wealth of additional experiences within a short drive: the Atlantic Drive showcases dramatic coastal scenery, Keem Bay itself is a pristine beach ideal for a post‑hike dip, and the Great Western Greenway provides cycling routes that intersect with the Croaghaun area. Accommodation options range from B&Bs in Dugort to hotels such as The Strand in Achill.
Further Reading
- Wikipedia entry on Croaghaun
- Detailed hike guide on The Irish Road Trip
- Visitor overview on Go‑to‑Ireland.com
Embark on the Croaghaun climb for a rare encounter with Ireland’s loftiest sea cliffs, where raw Atlantic power meets tranquil mountain solitude.