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McDermott’s Castle In Roscommon: A Place Like Something From Another World

McDermott’s Castle In Roscommon: A Place Like Something From Another World

There are few castles in Ireland as unique as the mighty McDermott’s Castle.

As you can see from the photo above, it’s quite literally plonked on a little green island smack bang in the middle of a lake.

Although McDermott’s Castle gets far less attention than the likes of the most haunted castle in Ireland and Blarney Castle, it’s still well worth a visit.

In the guide below, you’ll find out everything that you need to know about this incredible fairytale-like castle.

Welcome to McDermott’s Castle

McDermott's Castle roscommon

Photo by 4H4 Photography (Shutterstock)

You’ll find McDermott’s Castle in County Roscommon on Lough Key, 3km northeast of the town of Boyle.

Stretching around 10km across and forming a rough circular shape, Lough Key contains over 30 islands scattered throughout its chilly waters.

One of these islands is aptly named ‘Castle Island’ and it’s here that you’ll find the ruins of McDermott’s Castle.

A tale of tragedy 

mcdermott's castle in roscommon

Photos by ianmitchinson (shutterstock)

Local legend tells the story of a girl called Una, the daughter of the McDermott chief, who fell in love with a boy from a lower class.

Una’s father refused to let her leave the island, in the hopes that this would deter the budding relationship.

Unbeknownst to her father, Una’s boyfriend began swimming across Lough Key to reach the castle. It was during one of these crossings that tragedy struck, and the boy drowned.

It’s said that Una died from grief and that both she and her partner have remained buried beneath two intertwined trees on the island ever since.

Getting to McDermott’s Castle

If you fancy seeing more of Castle Island and McDermott’s Castle, there are several tour providers that offer trips to and around the island.

If you’re visiting the area, make sure to spend some time in Lough Key Forest Park. It’s home to around 800 hectares of gorgeous, picturesque wood and parkland with a lake and several wooded islands.

For those exploring the park, take some time to ;

  • Check out the observation tower
  • Have a gander at the wishing chair
  • Stroll through the underground tunnels.
  • Ramble along the Trinity Bridge
  • Have a snoop around the Bog Garden
  • Soak up some of the history of the area in the visitor centre and soak up some of the areas rich history

Have you visited McDermott’s Castle? Did you hop on one of the boat tours? Let me know in the comment section below!

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Pam J. Crowley

Saturday 27th of November 2021

Link to tours did not work

Mike Edwards Edwards

Tuesday 25th of May 2021

My 4 times Great Grandmother is Mariam (Mary) Mc Dermott Christening Mar 2 1839 Tibohine, Roscommon, Ireland. Shaun, Betty Ann,Rodney are we related??

Shaun McDermott

Thursday 14th of January 2021

Wow, thought I knew everything about my ancestors and just stumbled on this hidddn gem , cant wait to go and explore as soon as normality returns

Betty McDermott

Friday 9th of October 2020

Greetings from a McDermott in paradise: Costa Rica! Me an my son are planning to visit the castle as soon as the pandemic is over. Many thanks for the video and the history. Looking foward to the visit...BettyAnn McDermott.

Patrick de Nangle Costello Esq.

Saturday 5th of September 2020

The lad Una Mc Dermott was in love with was Thomas Og Costello from the wealthy Norman Irish Clan they had 3 Castles and nine Manor houses and over 30 thousand acres before losing most of it to Vicount Dillon’s family during Cromwells time . They had been in battle with the McDermotts over land for years that’s why the families didn’t aprove of the relationship Patrick de Nangle Costello Lord of Glashnacree in the kingdom of Kerry

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