Lough Tay is a small but scenic lake set in the Wicklow Mountains in County Wicklow, Ireland. It lies between the mountains of Djouce and Luggala, and is most easily viewed from above, from the R759 or the Wicklow Way as it descends past the J. B. Malone memorial. It is fed by the Cloghoge River, which then drains into Lough Dan to the south.

The northern coastline forms part of an estate belonging to the Guinness family; it is edged with a beach of startlingly white sand, the dark peaty water and the white sand create a striking similarity to a pint of Guinness.

The philosopher Bertrand Russell wrote in his Autobiography:

"Twice I went with my Aunt Agatha to Ireland. I used to go for walks with

Michael Davitt, the Irish patriot, and also by myself. The beauty of the scenery

made a profound impression on me. I remember especially a small lake in

County Wicklow, called Lugala. I have associated it ever since, though for no

good reason, with the lines:

Like as the waves make toward the pebbled shore,

So do our minutes hasten to their end.

Fifty years later, when visiting my friend Crompton Davies in Dublin, I

induced him to take me to Lugala. But he took me to a wood high above the

lake, not to the ‘pebbled shore’ that I had remembered, and I went away

convinced that one should not attempt to renew old memories."