St. Anthony's School is located at Humbert Way, Castlebar which is on the ring road around Castlebar.
From Westport direction:
At the first roundabout you meet take the right exit (signposted Dublin), continue for 200 metres and take the small road on your right. Look for the signpost saying St. Anthony's School.
From Dublin/Swinford direction:
Coming into Castlebar go straight through the first two roundabouts. You will pass by the Fire Station on your right and then a Corrib Oil filling station on your left. You then take the third road on your left signposted for St. Anthony's School BEFORE the Westport Road roundabout.