Poulanass Waterfall

Overview

Poulanass Waterfall is one of the most photographed natural features along the Wicklow Way, Ireland’s celebrated long‑distance trail that snakes through the Wicklow Mountains. Nestled in the steep, wooded slopes above the Upper Lake at Glendalough, the waterfall drops into a series of clear plunge pools before disappearing into a moss‑covered gorge. Hikers on Stage 4 of the Wicklow Way – the 14.5 km stretch from the monastic ruins of Glendalough to the glacial valley of Glenmalure – encounter the cascade after a short, vigorous ascent. The site is free to visit and is open year‑round, making it a reliable highlight for walkers of all seasons.

History

While Poulanass Waterfall itself has no recorded historic events, its setting is steeped in the ancient heritage of Glendalough. The valley was a centre of early Christian monastic life from the 6th century, and the surrounding landscape has long inspired poets, painters and pilgrims. The modern Wicklow Way, officially designated as a National Waymarked Trail, follows many of the routes once used by monks and shepherds. The waterfall’s name, Poulanass, is derived from the Irish Poll an Eas – “the hole of the waterfall” – a reminder of the deep linguistic roots that tie the natural feature to the surrounding culture.

The waterfall lies within Wicklow Mountains National Park, established in 1991 and covering over 85 square miles of granite peaks, glacial valleys and native woodlands. The park is managed by the National Parks and Wildlife Service, which maintains the board‑walk and the 600 plus wooden steps that lead to the viewing platform.

What to See & Do

The climb to Poulanass begins with a steep, stepped path that gains altitude quickly. After about 200 metres of ascent, walkers reach a board‑walk that skirts the gorge, offering safe passage over the slick rocks. The board‑walk stretches for roughly 1.7 km before it veers toward Lugduff Mountain, but the most rewarding segment is the series of more than 600 wooden steps that lead directly to a viewing platform overlooking the Upper Lake. From this perch, the waterfall’s roar can be heard echoing through the valley, and the sight of water cascading over dark basalt creates a dramatic contrast against the surrounding green.

The waterfall is also a natural waypoint for several popular routes:

• The Spinc Walk – a classic loop that incorporates the board‑walk and the wooden steps, culminating in a ridge walk with panoramic views of both Upper and Lower Lakes.
• Moderate Walks in Glendalough – as described by the Glendalough Hotel, this trail begins with a short but steep climb past the waterfall and its plunge pools before descending through mixed woodland to the valley floor.
• Rambles and Ramble‑In‑Glendalough – longer treks that use the waterfall as a landmark before heading toward Derrybawn Mountain or the secretive Glendasan Valley.

Wildlife enthusiasts may spot kingfishers darting over the pools, while the surrounding mixed woodlands provide habitat for red squirrels and a variety of mosses and lichens. The sound of the water, the scent of damp earth, and the play of light on the spray create a sensory experience that is both invigorating and meditative.

How to Get There

By car – From Dublin take the M50 south, join the M11 and exit onto the R755 towards Glendalough. Follow the signs to the Glendalough Visitor Centre; the waterfall is a short walk from the car park. Parking is available at the visitor centre (see Parking & Fees below).

By public transport – Dublin Bus runs services to Glendalough. From the bus stop, walk approximately 30 minutes following the Wicklow Way signs, or take a short taxi ride to the visitor centre and start the trail from there.

Scenic drive – The Sally Gap mountain pass, a short detour off the R115, offers panoramic views of the Wicklow Mountains and is popular with photographers heading to the waterfall.

Trail Options & Difficulty

All routes are well sign‑posted with colour‑coded arrows from the National Park Information Office near the Upper Lake. The board‑walk and steps are maintained but can be slippery when wet – sturdy walking shoes and, in winter, gaiters are advisable.

Trail Conditions & Seasonal Closures

The National Parks and Wildlife Service occasionally re‑routes sections of the network after severe weather. As of the 2026 update, the loop that passes directly over the waterfall (the Pink Route) may be temporarily closed after storm damage, with walkers directed onto the alternative silver‑arrow detour. The 600‑step wooden staircase remains in place, but recent upgrades have introduced switch‑backs to reduce erosion and improve safety.

When to Visit

• After rain – the cascade swells dramatically, creating a more powerful display.
• Late spring to early autumn – the surrounding oak and pine woodlands are at their greenest, and daylight is longest.
• Early morning or late afternoon – softer light enhances photography and the area is quieter.
• Winter – the waterfall is still visible, but icy conditions can make the steps hazardous; consider a shorter loop.

Flora, Fauna & Photography

The gorge is a haven for native flora such as mosses, lichens, and ferns that cling to the basaltic rock. Birdwatchers may spot kingfishers, treecreepers, jays and occasional red‑squirrel sightings. Photographers love the turquoise‑green shimmer of the plunge pools and the way mist catches the late‑day sun. A tripod is useful for low‑light shots, especially after a rain when the waterfall is at its fullest.

Nearby Attractions

• Glendalough Upper & Lower Lakes – just a short walk away; perfect for picnics or a paddle on a calm day.
• Lough Tay (Guinness Lake) – a striking emerald lake a few kilometres north, reachable via the R115.
• Monastic City of Glendalough – early‑Christian ruins, round tower and St Kevin’s Church, all within walking distance.
• Sally Gap – a scenic mountain pass offering expansive views of the Wicklow range.
• Powerscourt Waterfall – Ireland’s highest waterfall, about 30 km south, worth a day‑trip if you have time.
• Camaderry – a rugged summit nearby, often included in longer Glendalough loops.

Practical Information

• Access – The waterfall is accessed via the Wicklow Way, which is well sign‑posted with the universal yellow “walking man” symbol.
• Parking & Fees – Upper Lake car park (the main starting point) charges €4 per vehicle; the Lower Lake car park is free but adds about 1.5 km of walking to reach the trailhead.
• Public transport – Bus services from Dublin to Glendalough; a 30‑minute walk or short taxi from the stop.
• Opening hours – Open 24 hours year‑round (no admission fee).
• Facilities – Restrooms and a visitor information desk at the Glendalough Visitor Centre; no dedicated facilities at the waterfall itself.
• What to bring – Sturdy, waterproof shoes, rain gear, water, camera, and a small snack or picnic. Early‑morning light is best for photography.
• Safety – The 600+ wooden steps can be slippery when wet; take care on steep sections and watch for loose stones.
• Dog friendly – Dogs are permitted on the trail but must be kept on a lead near the waterfall and board‑walk.

For detailed navigation, hikers can download the ActiveME iPhone or Android app, which provides live GPS tracking of the Wicklow Way route. The trail is classified as moderate to strenuous, with a total climb of 551 m over Stage 4, so walkers should be comfortable with steep ascents and uneven terrain.

For further information on the Wicklow Way Stage 4, including maps and route notes, visit the ActiveME guide: Wicklow Way Stage 4 – Glendalough to Glenmalure.