Don't forget to visit the seaside resort of Rosses Point which is served by local buses regulary.
Roses Point is home to two fine sandy beaches, a yacht club and a few pubs. Apart from that you will get a spectacular view of the mountains (including Benbulben) and the beauty of Sligo Bay.
If you are staying in Rosses Point, you'll know that there is a small fishing dock near Yeats House. One evning whne i was there, i went along the Fish Dock area and found a nice concrete platfrom ontop of the small cliff, to sit on. I just gazed into the distance for ages, with the orange sunset lighting up the horizon. It was beautiful. I wanted to do it again the next evening, but sadly, the next day rained!