Overview
The River Mahon (Irish: An Mhathon) is a 30‑kilometre watercourse that rises high in the Comeragh Mountains and flows south‑east through County Waterford before reaching the Celtic Sea at Bunmahon. Its most striking feature is Mahon Falls, an 80‑metre cascade that tumbles over sandstone cliffs near the village of Lemybrien. The falls sit beside a well‑signposted car park off the N25, at the top of the famed “Magic Road” where an optical illusion makes cars appear to roll uphill.
History & Background
In the 19th century the Mahon powered five mills – one at Mahon Bridge, three at Kilmacthomas and another at Ballylaneen – turning grain for the local community. Though the mills are now silent, their stone foundations and the eight‑arched rail bridge at Kilmacthomas remain visible, offering a tangible link to Waterford’s industrial past. The river also passes a hawthorn “Fairy Tree” that was replanted after being cut down; locals still tie ribbons to it for good luck. The surrounding landscape bears the imprint of glaciation, with the river having cut a narrow sandstone gorge that frames the waterfall. The nearby “Magic Road” is a modern curiosity created by the road’s camber and surrounding hills, providing a quirky photo‑op spot for visitors.
What to See & Do
Mahon Falls Walks
- Easy Mahon Falls Loop – A 1.5 km, easy‑to‑moderate gravel track starts at the car park, follows the ridge, and reaches the base of the falls in about 20 minutes each way. The path is firm but becomes rockier and steeper near the cascade, where a natural flat rock platform offers close‑up views of the water plunging into the river.
- Longer Mahon Falls & Coum Tay Hike – An 11 km, roughly four‑hour loop that climbs Coumfea Mountain (713 m) before descending back to the falls. The route is unmarked, demanding solid navigation skills, a map or GPS, and caution on boggy ground after rain.
River Valley Exploration
- Short walks along the gentle bends of the Mahon connect farmland, woodland and small villages. The stretch from Mahon Bridge to Bunmahon is popular for spotting old mill stones, otters and the occasional fairy‑tree ribbon.
Kayaking & White‑water Play
- The river offers a mix of calm sections and challenging rapids, attracting B1 and B2 class kayakers. Notably, a 55‑foot vertical drop at the top of Mahon Falls was successfully descended in 2005.
Heritage Highlights
- Explore the remnants of the five historic mills, the stone cottages of Mahon Bridge, and the striking eight‑arched rail bridge at Kilmacthomas.
- Photograph the “Magic Road” illusion beside the falls – a favourite spot for families and Instagrammers.
Practical Information
- Car park: Free, open year‑round. Spaces are limited in summer; arriving early secures a spot.
- Access: The falls are a 25‑minute drive from Dungarvan and 40 minutes from Waterford City via the N25.
- Trail difficulty: The main loop to the falls is moderate, with uneven stone steps; the longer 11 km hike requires good fitness and navigation skills.
- Facilities: No permanent toilet facilities at the car park; a picnic bench is available near the trailhead.
- Safety: The rocks around the base of the falls can be slippery when wet. Kayakers should check water levels and local conditions before setting out.
- Seasonal notes: After heavy rain the cascade thunders down, creating dramatic spray; in drier periods it becomes a shimmering veil, offering excellent photographic opportunities.
Nearby Attractions
- Bunmahon – A charming coastal village with a historic harbour and sandy beach, just a short drive downstream.
- Comeragh Mountains – The wider mountain range offers additional hill‑walking routes such as the Coumduala Loop.
- Dungarvan – A coastal town with a medieval castle, harbour, and vibrant food scene, ideal for a lunch stop before or after your Mahon Falls adventure.
Enjoy the blend of natural power, historic charm and outdoor adventure that Mahon Falls and the River Mahon provide to every visitor.