Where did Marin grow up in the novel, We Are Okay?

Marin is from San Francisco, the city where she lived with her grandfather, Gramps, before she went to college. Mabel also used to live in San Francisco until she went to college in Los Angeles. In said city, Mabel's parents [Ana and Javier] still reside. The city has many beautiful beaches at which Marin spends considerable time. She has not returned to this home-city since the day that Gramps committed suicide.