Overview
The River Camac flows through Corkagh Park and Clondalkin before reaching the River Liffey at Heuston Station. That is the kind of river this is – not a wilderness, but a small urban waterway wound tightly into Dublin’s history. It rises in the Dublin Mountains and was one of the tributaries that helped the early city grow to the west. Drimnagh Castle’s moat is fed by the Camac. Along its course you pass a 7th-century monastic site, old mill remains, new planting and modern parks in the space of a few kilometres.
Crayfish plague: Check, Clean, Dry
Crayfish plague was confirmed in the Camac in 2026. It is devastating to the native white-clawed crayfish and harmless to people and pets. Follow Check, Clean, Dry for boots or equipment that has touched the water, so you do not carry the disease to another river or lake.
History and heritage
The name Camac is usually read as ‘crooked’ or ‘wandering’, a fair description of a river straightened, culverted and restored by turns. Excavations near Clondalkin Round Tower point to an early Christian settlement founded by St Chrónán Mochua in the 7th century, with the river as its water source.
By the 17th and 18th centuries that reliable flow drove a dense industrial belt: sawmills, paper mills at Saggart, Clondalkin, Killeen and Drimnagh, gunpowder mills, woollen mills, and a silk mill and linseed-oil works in Kilmainham. As the mills closed the river slipped out of sight – long stretches were culverted and its water quality fell away. The volunteer group Friends of the Camac, set up in March 2018, works with Dublin City Council and others to clean the river and its surroundings and bring it back into public view.
Ecology and restoration
The Camac’s recovery is real but fragile, and 2024 showed how quickly it can go backwards: a pollution incident traced to a construction firm killed some 500 brown trout, 250 native crayfish and 250 lampreys along a 3.5 km stretch of the river. Restoration work has continued since. Friends of the Camac have proposed around 30 rock-cobble weirs to improve habitat. They create deeper, oxygen-rich pools for fish and the small invertebrates that feed them, while native trees and shrubs are planted to hold the banks and filter runoff.
What to see and do
The Camac is best taken as a string of stops rather than one continuous trail:
- Corkagh Park – public paths, with historic lakes and former mill-ponds that are good for waterbirds. See the South Dublin County Council page.
- Clondalkin Round Tower – beside the 7th-century monastic site the Camac once supplied. The council has a marked route towards Clondalkin.
- Drimnagh Castle moat – a flooded moat fed by the river.
- Inchicore and Kilmainham – the lower Camac runs through this part of the city, near two of its big heritage sites, Kilmainham Gaol and the Royal Hospital.
Walking and wildlife
Stick to public paths and the council’s marked route. Along the lower Camac you may see swallows, kingfishers and wintering waterfowl, with more life in the restored pools in spring. The ground can be uneven, so wear sturdy footwear.
Practical information
- Getting there: the Blackhorse, James’s and Heuston Luas stops serve the central corridor, and Heuston is a major rail hub. Check current services before you travel.
- Parking: use public parking, and check with the council for current arrangements.
- Flood safety: the lower Camac rises quickly in heavy rain. Keep back from the river, especially after heavy rain, stay off the concrete spillways, and turn back at flooded paths.
- Community and heritage: the Camac River Culture and Heritage Programme, launched in 2018 by Dublin City Council and the Local Authorities Water Programme, has run school outreach, talks, poetry competitions and guided walks.
The Camac offers no mountain views and makes no attempt to. What it gives is a layered visit – a monastic tower, former mill sites, a castle moat – on a river slowly being handed back to nature. Check the Friends of the Camac for restoration news, and follow the crayfish-plague advice before you go near the water.