Castleknock to Leixlip Confey

Part 3 of our journey sees us start at Castleknock Train Station and the start of the stretch known as the Deep Sinking, on past Coolmine and Clonsilla before crossing the Dublin and Kildare county line and finishing at Cope Bridge at Leixlip Confey, a distance of 8.65 kilometres.

There are several reasons why I have chosen to do my first few posts as walks rather than runs or cycles. The first being that in the early stages leaving Dublin there are so many prominent landmarks, bridges and locks all worthy of mention that the posts would be extremely long if I was covering a greater distance. The second was for when I reached the Deep Sinking and what lies beyond it to Leixlip Confey and even on to Maynooth.

Many who know the area know that unlike from the city centre to Castleknock which has all paths or from west of Maynooth Harbour where the Royal Canal Greenway is complete all the way to Cloondara, the section between Castleknock and Maynooth is more trail like with a variety of surfaces which can be uneven, slippy, mucky and narrow.

By no means should this put you off wandering along this stretch of the canal. Given it is surrounded by houses and railway it still has a rural and secluded feel. What follows here is just a matter of fact account of how the stretch is as of March 2020 and that the reality is it is best walked at a relaxed pace, ideally in hiking boots or trail runners and being honest it is not suitable for bikes. Fingal County Council and Waterways Ireland have plans to upgrade this section and some ground surveys are ongoing (which also leads to the occasional closing of the canal path) but it is unlikely that this work is going to be completed in the near future.

I would consider the trail beside the Deep Sinking in several parts. The first part is a very short wide space which is just grass as you leave Castleknock Train Station. Not long into this though the path narrows to reflect the images above. This narrow path starts to rise up above the canal and for the most part is soft and often muddy ground with gulleys slipping down the slope and tree roots to be mindful of. This section stretches for 1.5 kilometres as far as Kirkpatrick Bridge and Coolmine Train Station.

While the building of the Royal Canal started in 1790, the original survey to find a suitable route across north Leinster was undertaken by Thomas Williams and John Cooley as early as 1755. Their suggested route would have utilised a series of lakes and rivers along the way to the Shannon in an effort to keep construction costs down.

However as the story goes, William Robert Fitzgerald, the 2nd Duke of Leinster, a subscriber of the Royal Canal Company wanted the canal to pass his country residence of Carton House outside Maynooth and this necessitated the routing of the canal through a limestone quarry. A sinking is where a canal is cut through the land to maintain the same level rather than using locks to go over it. The Deep Sinking itself is a cutting through the limestone quarry which was blasted and dug through at great expense. At certain points through the Deep Sinking the towpath can rise up between 8 and 9 metres above the canal. A perilous danger for the horses pulling the barges below.

We are unable to go under Kirkpatrick Bridge and so must rise up and cross the main road and level crossing at Coolmine Train Station before proceeding on the second section of the Deep Sinking towards Keenan Bridge. The surface on this section is similar to the previous section though there are a few more stony out crops to be mindful not to trip on. A video by Ciaran Whyte showing what it is like from Coolmine to Deey Bridge at the 13th Lock can be viewed here.

Like the previously discussed Reilly’s Bridge near Broombridge, Keenan Bridge at Porterstown was often the site of long tail backs with the level crossing beside it so before we reach the bridge we pass under Dr. Troy Bridge which rises high above both the canal and railway removing the need for the level crossing.

The area around Keenan’s Bridge in Porterstown could be considered one of sorrow. The first thing we see as we reach the bridge is the abandoned Gate Keepers Railway Cottage at the old level crossing. At this point we must cross over Keenan Bridge from back to the north bank of the canal to continue. As we descend back down to the canal path we see a memorial to the sinking of the Longford Passanger Boat on the other side of the bridge.

As previously mentioned the massive drop between the towpath and the canal at the Deep Sinking was rather dangerous and 16 people lost their lives when the passenger boat Longford sank near here on the 25th of November 1845. An account of the sinking can be found on the Irish Waterways History website here.

Before carrying on our journey west on the north bank we can see the old Porterstown National School rise high above the canal bank. This abandoned school, closed in 1963, is known by many in the area as the School of Spite as the priest who sought to build it insisted it be built to such a height so as to annoy the local landowner Baron Annaly of Luttrellstown Castle who refused to contribute to the schools construction. In 2010 the building is sadly associated with the murder of a 12 year old girl who went missing in the area giving rise to the building being fenced and secured.

Thankfully I do have some good news as we continue west, after leaving the trail path of the south bank from Castleknock we do get a compacted stone dust path from Keenan Bridge for 1.2 kilometre to Callaghan Bridge in Clonsilla.

As we pass under Callaghan Bridge at Clonsilla we can see the Clonsilla Train Station Signal Box rising high above the canal.

You must pass under the bridge and come up on the other side to actually get to the train station. There is also an Applegreen service station only a 2 minute walk from the station if you feel the need to top up supplies.

The railway splits just after Clonsilla Train Station with one line continuing west towards Sligo and the other being the reinstated line that crosses the canal and heads north through Dunboyne and on to the M3 Parkway park and ride station. We pass under the new railway bridge not far west of Clonsilla.

We are back on the grass once we reach the far side of the railway bridge as we proceed on towards Pakenham Bridge. The bridge is most likely named for Thomas Pakenham who became a Rear Admiral in the Royal Navy and later the Master General of Ordnance in Ireland. He was the youngest son of the 1st Baron of Longford.

After going under Pakenham Bridge we have a 1.8 kilometre stretch towards Collins Bridge with Westmanstown Golf Club and sports facilities on the opposite bank. Again this is a manageable soft grass surface which can be muddy when wet.

Passing under Collins Bridge the ground on the other side has a tendency to be very soft even when dry. This section had to be closed lately after some maintenance vehicles tore up the ground as they were working. Hopefully this should be reopened to pedestrians soon but for now or for those on a bike if you go north from the bridge and turn left you can follow the road down as far as the Royal Canal Amenity Group’s (RCAG) boathouse and rejoin the canal there.

1 kilometre from Collins Bridge we leave Fingal and County Dublin and enter County Kildare, welcomed by the sign of the RCAG Boathouse and Slipway. It is a most welcome sight to see a good number of boats currently tied up here as let us not forget that while we are enjoying our walk, cycle or run, the Royal Canal is first and foremost a navigation.

It is only a short walk from the boathouse, past Confey GAA to Cope Bridge and Leixlip Confey Train Station and in total we have covered 8.65 kilometre through the Deep Sinking, past Coolmine and Clonsilla, leaving Dublin behind us and entering Kildare. Close to Cope Bridge there is a Supervalu at Riverforest the far side of the bridge as well as the River Forest Hotel with pub and grub.

Author: The Royal Canal Runner

My name is Gary O’Daly and I am a member of Dublin Bay Running Club.

I started running in 2011 when my wife Niamh signed up to run the Celbridge AC 5K and I decided to join her. I haven’t stopped since. I ran my first Marathon in Dublin in 2012 and was soon taking part in the East of Ireland Marathon Series events which led me to joining D.B.R.C. in 2015 under coach Ger Copeland. I am also an active core team member of Griffeen parkrun in West Dublin.

My biggest achievement is setting the Fastest Known Time (still the only known time) for running the full length of the Royal Canal but running highlights include running the Belfast 24 Hour relay event with my club mates, running the London 2 Brighton 100k ultra with my wife, running the Berlin marathon the day Kipchoge set the world record and completing the Donadea 50k five years in a row.

Living in Maynooth I am lucky to have the Royal Canal only 400m from my house so I really make use of the fantastic amenity of the Royal Canal Greenway west of the town. With the warm up done by the time I reach the towpath I can do some speedwork on the straight out to Jackson Bridge, fit in a comfortable 10k by running out to Kilcock and back or enjoy a long run out to Enfield and back. Having the waterway beside you and the fields all around you makes it the perfect training ground.