 Until recently rail service supported the bus services in the morning and afternoon between São Marcos and São Bartolomeu de Messines, but were discontinued in the early 21st century.São Marcos da Serra is a main supplier of Cork, as well as a producer of grain cereals, including wheat, barley and oats, at one time supported by several traditional windmills that dotted the parish.Beekeeping is common in the hills surrounding the parish, resulting in an itinerant economy in wax and honey collected from local beehives.