We spent a w'end in Sligo (Castlebaldwin) in a hotel called Cromleach lodge (its about 20 mins before sligo town.
Great walks. The hotel has acres of land - there is a lovely walk up through a forest just on your door step. And the hotel is overlooking Lough Arrow - so very scenic!
Alternatively you can drive for about 8km to Carrowkeel and take a 1km walk up to view the Megalitic Tombs.... surrounded by great views of Lough arrow,and some friendly sheep!
4*Hotel is lovely too!!! (and doggies are welcome!)