Overview
The Slieve Bloom Mountains stretch across the heart of Ireland, linking County Laois and County Offaly. Though modest in height – the range’s summit, Arderin (527 m / 1,729 ft), is the highest point in both counties – the hills are among Europe’s oldest mountains, once soaring to about 3,700 m before relentless erosion left a landscape of rolling blanket bog, heath and scattered conifer forest. From the broad, bog‑covered plateau of Arderin, visitors can glimpse the rolling plains of Offaly, the agricultural fields of Laois, and on clear days the distant Wicklow Mountains, Dublin hills and even the Galtee range.
History & Background
The Slieve Blooms have been a cultural crossroads for millennia. Geologically they began forming around 450 million years ago when the land that is now Ireland straddled two ancient continents, later uplifted along the Iapetus suture. Historically the range marked the northern border of the kingdom of Osraige and later Upper Ossory. Irish legend ties the hills to Fionn Mac Cumhaill, who is said to have been raised on these slopes by his aunts Bodhmall and Liath Luachra; a cave reputed to be his hidden refuge is still spoken of in local folklore. The name Sliabh Bladma (Slieve Bloom) derives from a mythic figure Bladma, linked to ancient tales of heroism and sea‑monster battles.
Scattered across the hills are historic sites: Kinnitty Castle, originally built in 1209 and now a luxury hotel with a medieval‑style Dungeon Bar, and Emo Court, a neo‑classical mansion designed by James Gandon, both offering guided tours and beautiful parklands. The area also contains ring forts and megalithic tombs, testifying to a human presence that stretches back to the Neolithic.
What to See & Do
Walking & Hiking
- Slieve Bloom Way – a 71‑km long‑distance trail that can be tackled in three days or broken into shorter sections from any of six trailheads (Glenbarrow, Clonaslee, Cadamstown, Kinnitty, Glenafelly Forest, Glen Monicknew). Loop colours indicate difficulty: green (easy), blue (moderate), red (hard).
- Glenbarrow Waterfall Loop (4.5 km, moderate) – a forested walk ending at the cascading Glenbarrow Falls.
- Silver River Eco Trail (7 km, strenuous) near Cadamstown, winding through native bog habitat.
- Giant’s Grave Loop (11 km, hard) – passes a megalithic tomb linked to the Bladma legend.
- Kinnitty Castle Loop (4.5 km, moderate) – combines woodland strolling with a visit to the historic castle.
- Arderin Summit – a short climb from Glendine Gap or Glenbarrow leads to a modest cairn, an Ordnance Survey concrete pin and sweeping vistas.
- Extended ridge walks – link Arderin with neighbouring peaks such as Wolftrap Mountain (487 m) and Baunreaghcong (509 m) via sections of the Slieve Bloom Way for a longer loop.
Nature & Wildlife
The blanket‑bog ecosystem supports heather, sphagnum moss, sundews and a rich bird community, including the protected hen harrier and buzzard. The range is a designated Special Protection Area for rare birds such as the red grouse. Spring brings a carpet of purple heather and the occasional sighting of the elusive golden plover.
Getting there & Transport
The Slieve Bloom Mountains are most easily accessed by car via the R422 (Rosenallis‑Clonaslee) or the R440 (Kinnitty). The nearest major towns are Portlaoise (≈30 km north) and Birr (≈25 km south). While there is no regular public‑transport service directly to the trailheads, Bus Éireann routes serve Portlaoise and Birr; from there a local taxi or a short drive is required to reach the car parks at Glendine Gap, Glenbarrow or Kinnitty. For cyclists, the Grand Canal Greenway runs close to the Kinnitty trailhead, offering a scenic link from Portarlington.
Nearby Attractions
After a day on the hills, consider visiting these Laois highlights:
- Castle Durrow – an 18th‑century estate with formal gardens and a historic house museum.
- Aghaboe Abbey – the ruins of a 6th‑century monastic site set in tranquil woodland.
- Clonaslee – the gateway village to the Slieve Bloom Way, with a small heritage centre and local craft shops.
- Emo Court – already mentioned, but worth a separate visit for its landscaped parkland and lake.
- Birr Castle – famed for its historic telescope and extensive gardens, a short drive south.
- Clonmacnoise – a 6th‑century monastic site on the River Shannon, reachable within 30 minutes by car.
Practical Information
Access Points & Parking
| Trailhead | Grid Ref / Location | Parking | Notes |
|---|---|---|---|
| Glendine Gap | – | ~5 spaces only; arrive early in summer | Direct, steep bog path to Arderin; limited facilities |
| Glenbarrow Car Park | N 356 081 (off R422 near Rosenallis) | Small car park, free | Feeds onto the Slieve Bloom Way; passes Glenbarrow Waterfalls |
| Kinnitty | – | Village car park | Good for Kinnitty Castle Loop and shorter forest walks |
Trail Options to Arderin
| Route | Distance (round‑trip) | Approx. Time | Difficulty | Highlights |
|---|---|---|---|---|
| Glendine Gap (bog path) | 2 km | 1 h | Moderate | Direct summit, panoramic views |
| Glenbarrow (Slieve Bloom Way) | 8–10 km | 2.5–4 h | Moderate | Waterfalls, varied terrain |
| Kinnitty/Glendine (combined) | 5 km | 1.5 h | Easy‑moderate | Links village amenities with summit |
Visitor Information
- Website: slievebloom.ie
- Phone: (to be confirmed – add when available)
- Opening hours: information not currently published; please check the official website or contact the visitor centre.
- Parking fees: Generally free, but some car parks may have seasonal charges – verify locally.
Tips
- Weather changes rapidly; bring waterproof clothing and sturdy boots.
- The boggy sections can be slippery; trekking poles are recommended.
- Early morning or late autumn often yields the clearest views across the midlands.
- Respect the wildlife – keep dogs on a lead during nesting season for hen harriers.
Enjoy the gentle grandeur of the Slieve Bloom Mountains, where ancient geology, mythic history and vibrant nature converge on the summit of Arderin.