Overview
Cladagh Glen is a 4.6‑mile (2.5 km) linear trail that winds through one of Northern Ireland’s best‑preserved ancient ash woodlands. Set within the Marble Arch Caves Global Geopark, the walk follows the re‑emergent Cladagh River as it tumbles over limestone steps, passes the dramatic Cascades waterfall and arches beneath the natural Marble Arch. The reserve is managed by the Northern Ireland Environment Agency and forms part of the Cuilcagh Lakelands UNESCO Global Geopark.
History & Background
The Cladagh River originates underground, where the Owenbrean, Shruhcroppa and Aghinrawn streams converge in the extensive Marble Arch Cave system. After a spectacular resurgence beneath a cliff face, the river bursts onto the surface at the Marble Arch Rising and immediately enters the narrow, steep‑sided gorge that defines Cladagh Glen. The woodland that lines the gorge is a rare remnant of the damp ash forests that once covered much of Ireland; many of the trees are direct descendants of those ancient stands. In 2024 the reserve reopened after foot‑path improvements carried out by the Northern Ireland Environment Agency, reaffirming its status as a flagship trail within the Geopark.
What to See & Do
- Cascades Waterfall – About a mile into the walk, water re‑emerges from the Cascades cave system and plunges down a natural limestone staircase, creating a crystal‑clear cascade that is especially photogenic in spring.
- Marble Arch – This striking natural limestone arch spans the river and offers dramatic views of the gorge below. A stepped boardwalk takes walkers over the arch, revealing craggy holes that hint at the underground river network.
- Flora & Fauna – The damp ash woodland supports a carpet of bluebells, wood anemone, primroses and celandines in spring. Red squirrels, pine martens and dippers are regular sightings, making the reserve a haven for wildlife enthusiasts.
- Link to Marble Arch Caves – The trail terminates at the Marble Arch Caves Visitor Centre, where you can join a guided underground tour or relax in the on‑site café.
- Educational Resources – Information sheets for students and teachers are available from the Geopark website, providing deeper insight into the karst landscape and its hydrology.
Seasonal Highlights
- Spring (March–May) – The valley floor bursts into colour with bluebells, wood anemone and early primroses. This is the best time for macro‑photography of wildflowers and for spotting red squirrels.
- Summer (June–August) – Longer daylight hours make it possible to complete the walk in a single afternoon; dippers and kingfishers are frequently seen along the river.
- Autumn (September–October) – Ash leaves turn a golden‑bronze, and the gorge takes on a dramatic, mist‑filled atmosphere after rain showers.
- Winter – The trail remains open, but icy conditions on the limestone steps can be hazardous; sturdy footwear is essential.
Safety & Trail Conditions
As of July 2025 the walk was temporarily closed following flash‑flood damage to sections of the boardwalk and stone steps. The Northern Ireland Environment Agency is conducting safety assessments and repairs. Visitors should check the official Marble Arch Caves website for the latest reopening date before travelling.
Practical Information
Cladagh Glen can be accessed from two car parks. The Cladagh Glen Car Park sits at the southern end of the route, is free, open year‑round and offers space for about ten cars – ideal for families with prams, although a 1 m stone stile must be lifted to start the walk. The Marble Arch Caves Car Park at the northern end is free but only open during the cave centre’s operating hours (9:00 am–5:00 pm).
| Facility | Details |
|---|---|
| Opening Hours (Car Parks) | Cladagh Glen Car Park: Open daily, year‑round. Marble Arch Caves Car Park: 9:00 am–5:00 pm (cave opening hours). Check the website for any seasonal changes. |
| Admission | Free entry to the nature reserve. Guided cave tours have separate fees. |
| Parking | Free at both car parks (capacity limited to ~10 vehicles at the southern end). |
| Accessibility | The southern start is suitable for families with children and pushchairs if the stile is lifted. The northern start involves steep steps and is not suitable for pushchairs or wheelchairs. |
| Dogs | Allowed on a lead; keep them on the path due to shake‑holes and crevices. |
| Facilities | No toilet facilities on the trail; restrooms are available at the Marble Arch Caves Visitor Centre. Picnic area available near the southern car park. |
Getting there – From Enniskillen take the A4 (Sligo Road) west, turn left onto the A32 (Swanlinbar Road), then right onto Marble Arch Road through Florencecourt. Signage for the Cladagh Glen car park appears near a stone bridge on this route.
Contact & Further Information – For group bookings or enquiries, call +44 (0) 28 6632 1815 or email mac@fermanaghomagh.com. Detailed maps and downloadable visitor guides are available on the Marble Arch Caves website.
Nearby Attractions
The walk sits within walking distance of the Marble Arch Caves, Cuilcagh Boardwalk Trail, Florence Court Estate and the wider Cuilcagh Lakelands Geopark. Other worthwhile stops include:
- Crom Castle – A historic fortified house set on the banks of the River Erne, offering guided tours and a café.
- Crom Estate – Extensive woodlands and walking routes that complement the Cladagh Glen experience.
Enjoy a day of geology, wildlife and woodland walks in the heart of County Fermanagh.