“Cortes Island” is a short story by Alice Munro, included in the 2013 collection The Love Of A Good Woman, which won the Nobel Prize in Literature. Like another story in this collection, “Jakarta”, the title of this story is set in a place away from where the action takes place. Writers often say that the characters who exist off the page are as important as the character who exist on the page (engaged in the action). The same is true of places, especially for a writer like Alice Munro. This is yet another way in which a setting can be considered a character.
In this case, Cortes Island is the place where the first person narrator’s landlady used to live as a young woman. The real Cortes Island lies off the coast of British Columbia. In 2016 it had only 1,035 permanent residents. Its school has since been closed. You get there by plane or ferry.