Mahon Bridge, County Waterford | Waterford

Overview

Mahon Bridge sits on the R676 between Carrick-on-Suir and Dungarvan, roughly five kilometres west of Kilmacthomas. While the settlement itself is small, it functions as a practical base for exploring the foothills of the Comeragh Mountains. The River Mahon flows through the village, eventually reaching the coast at Bunmahon, and the stone crossing that gives the area its name marks the start of several well-used walking and cycling routes.

Walking the Mahon Valley

Mahon Falls

Just north of the village, the river drops through a steep gorge to form Mahon Falls. The 300-metre cascade is reached via a clearly sign-posted trail that branches off the R676. A small car park sits on the left side of the road at the trailhead. The path is surfaced with gravel and follows the river through a damp, fern-rich valley. You can expect to see Wilson’s filmy-fern, fir clubmoss and great wood-rush, while birdwatchers often spot wheatear, siskin, crossbill and meadow pipit. Raptors like peregrine falcons and buzzards frequently circle the higher crags.

The return walk covers roughly 2.5 km and takes about 40 minutes at a steady pace. The trail is generally gentle but becomes uneven near the falls, so sturdy footwear is recommended.

Crough Wood

For a more relaxed route, Crough Wood offers a 3 km loop that follows the River Mahon upstream. The main walkway from the entrance stretches 0.68 km, with picnic tables nearby for a break. A newer 1 km footpath connects the village crossroads directly to the Crough Wood car park, cutting the approach time to around 20 minutes. The woodland floor is relatively flat and firm, making it a reliable option for families or anyone preferring a gentle grade. Spring brings active birdlife, summer provides dense shade, and autumn turns the canopy gold.

Cycling the ‘Magic Road’

Cyclists heading to Mahon Falls tackle the ‘Magic Road’, a fully paved ascent that has earned a reputation as one of Munster’s steeper climbs. The route measures 2.7 km with 194 m of elevation gain. The average gradient sits at 7.2%, peaking at 10.8% in the steepest section. Most riders complete the climb in 10–15 minutes, depending on gearing and fitness. The descent back to the village is fast and requires careful braking on the narrow sections.

History & Heritage

The village developed around a stone crossing that historically linked inland farms to coastal trade routes. The River Mahon once powered five mills along its course. Remains of a 19th-century corn mill at Furraleigh still show a tunnel and chimney, while a larger famine-era mill built between 1845 and 1848 stands upstream. Though it saw limited commercial use, the structure’s stone walls remain intact.

In 2009, a low-impact hydroelectric scheme was installed just upriver. Fed by two weirs on the Mahon and Mahon Og, the subterranean turbine house generates up to 850 kW for the national grid without disrupting the valley’s visual character.

Archaeological surveys have also identified older features in the area, including the remains of a 17th-century slate house with a bawn. The property, once owned by Darby O’Brien, was destroyed by fire in 1643 during the Irish Confederate Wars. A nearby souterrain and a historic children’s burial ground add further layers to the local landscape.

Practical Information

Getting there From the N25, exit onto the R676 near Mahon Bridge. Follow signs for Comeragh Drive. The Mahon Falls car park appears on the left after approximately 1 km. For Crough Wood, continue toward Mahon Falls; the woodland car park is on the right.

Parking & Access Both car parks are free and open year-round. Spaces are limited but generally sufficient outside peak summer weekends. The Mahon Falls trail is gravel and mostly accessible, though the uneven ground near the cascade may be difficult for wheelchairs. Crough Wood’s main path is flatter and more suitable for all-ability walkers.

Best time to visit Summer offers the most reliable footing on the gravel sections. Early spring frequently brings mist to the gorge, creating strong contrast for photography. Winter can leave icy patches near the falls, so check conditions before heading out.

Nearby stops A short drive north reaches Comeragh House, a Georgian estate visible from the road. The village also sits within easy reach of neighbouring hamlets like Kilrossanty, Fews, Furraleigh, Briska and Lyre. Local ceramic artist Adele Stanley works in the village; her porcelain tableware is sold at Ardmore Pottery & Gallery in Ardmore.

Useful resources

Plan to arrive before midday if you want the car park spaces, and pack a light layer even in summer – the valley temperature drops noticeably once you’re below the tree line.