The Marvelous Archdiocese of Baltimore Website
They simply don't make it any easier than this. If you go here, you'll find the "Parish" page . Note that the Parishes are organized alphabetically , by county (using a map) and by Vicariate (Archbishop O'Brien has several Auxiliary Bishops each of whom has an area of jurisdiction). Below this, one can search for a Mass by "time and day." Put in the day and select the time and a Mass is found for you here . Note that one can search for Confession by time and day here . Here is a list of the Shrines, Grottos and also the Parishes of the Byzantine Rite . And for those looking for a Mass by language, for those who are hearing impaired and so on, go here . Hat tip! It just doesn't get any easier than that!