When the Kildare bypass was pushed across the Curragh in 2003, the engineers had a problem: the road threatened to cut the springs that feed Pollardstown Fen, and draining those springs would have killed it. The fen is the largest spring-fed calcareous fen left in Ireland, and it lives or dies on mineral-rich water welling up from the aquifer under the Curragh – which is what keeps it alkaline rather than acidic, a fen and not a bog. That distinction is the whole point of the place.
It sits on the northern edge of the Curragh, about 3km from Newbridge. The reserve covers around 130 hectares, 60% of it state-owned, and carries about every protection going: national nature reserve since 1986, Special Area of Conservation, and Ramsar wetland, designated in 1990.
A lake that turned to peat
The fen started as a hollow scooped out by retreating ice at the end of the last glaciation, filled with meltwater to make a shallow lake. Over thousands of years reeds and sedges colonised it, died back, and built up as peat, raising the wetland floor a little at a time. Drainage schemes in the 1960s threatened to undo all of that, which is what prompted its protection in the decades that followed.
Walking the boardwalk
A single wooden boardwalk loops through the fen and takes about an hour at a gentle pace. It’s flat and dry the whole way, so it suits pushchairs and anyone who’d rather not deal with rough ground, with interpretive panels along the route and a bird hide for watching waterfowl without putting them up.
The vegetation is the draw as much as the birds. Black bog rush and saw sedge dominate, and among them grow orchids – the fly orchid included – along with broad-leaved bog cotton and the carnivorous western bladderwort, which traps tiny prey in the spring-fed pools. It’s low-key rather than spectacular: a place for looking closely, not for big views.
Wildlife through the year
The reedbeds and pools hold a shifting cast of birds. Reed buntings and sedge warblers sing through spring and summer; herons, little grebe, coots and moorhens work the open water; and in winter the pools take overwintering ducks including pintail and tufted duck. Dragonflies and damselflies own the air above the water on warm summer days.
Beyond the birds there are otters, hares and pygmy shrews, and smooth newts in the pools. The calcium-rich water also supports rare whorl snails – Vertigo geyeri and Vertigo angustior among them – exactly the sort of fussy species that only survive where the alkaline balance stays right, and a good sign the fen is healthy.
Getting there and practical notes
Pollardstown Fen is off the road between Newbridge and the Curragh, roughly 3km from Newbridge, with a free car park at the entrance and clear signage. There’s no public transport to the gate, so it’s car or taxi from Newbridge.
- Hours and cost: open year-round, dawn to dusk, no charge.
- Facilities: the boardwalk is level and buggy-friendly and there’s a bird hide, but that’s about it – no bins, so take your rubbish home, and bring your own water.
- On the ground: stay on the boardwalk to protect the peat, keep dogs on a lead, and leave plants and nests alone.
If you’re making a day of it, the Bog of Allen and Donadea Forest Park are both a short drive on for more of the same low-key nature. Come on a still morning early in the day and early in summer, though: that’s when the orchids are out, the birdsong is loudest, and you’ve the boardwalk more or less to yourself.