Shannon Airport & Limerick to Achill
From Shannon Airport follow signs for Limerick and Galway (N18 & N19). Proceed along N19, straight ahead at roundabouts at junctions for Free Zone West and Shannon Town Centre. At the junction with N18, take roundabout 1st exit (signposted Galway, Ennis) onto N18.
Follow N18 through Clarecastle, Ennis, Crusheen, Gort, Ardrahan, Kilcolgan and Clarinbridge.
At junction with N6, take 2nd exit on roundabout for the N6. Proceed straight ahead at junction with N18 (North), then at junction with N6 East and N6 West, take 2nd exit on roundabout. At junction with R339, take 2nd exit on roundabout. At junction for Galway City East, go straight ahead on roundabout. At junction with N17, proceed straight ahead on roundabout. At junction with N84, take 3rd exit on roundabout onto the N84 (signposted Castlebar, Headford).
Follow N84 through Clonboo, Headford (turn right), Shrule, Kilmaine, Ballinrobe, Partry, Ballintubber and Ballyhean. At junction for N60, go straight ahead onto N60 to Castlebar.
In Castlebar, at the junction with the N5, take 1st exit at roundabout (signposted Westport, Achill). At the next roundabout (junction with R311) take the second exit, signposted R311 Achill and Town Centre. At the fourth (final) roundabout, take the first exit (straight ahead), and turn left at next junction (signposted Achill). Follow this road (R311) to Newport, turn right at junction with N59 through the village, follow N59 through Mulranny.
From Mulranny, follow signs for Belmullet (N59) for one mile, then branch left onto R319 signposted Achill. You will shortly arrive in the parish of Achill. For Achill Island, simply follow the R319 through Tonragee and Polranny. Achill Island is connected to the mainland by a road bridge at Achill Sound.