| Split (km) | Directions | Road | Total (km) |
|---|---|---|---|
| 0.0 | Start out at Dun Laoghaire Harbour, Dublin | - | 0.0 |
| 0.0 | Continue forward onto Queen's Road | - | 0.0 |
| 0.2 | At traffic signals turn right onto Harbour Road (signposted Belfast and North N1) | - | 0.2 |
| 0.5 | Continue forward onto the N31 | N31 | 0.7 |
| 0.0 | At traffic signals turn right onto Crofton Road - N31 (signposted All Routes) | N31 | 0.7 |
| 0.1 | At traffic signals continue forward onto Dunleary Road - N31 | N31 | 0.8 |
| 0.7 | Salthill and Monkstown Station | N31 | 1.5 |
| 0.2 | Turn left onto Brighton Avenue | - | 1.7 |
| 0.2 | Turn right onto Monkstown Road - R119 | 1.9 | R119 |
| 0.9 | At traffic signals turn left onto Temple Hill - R113 | R113 | 2.8 |
| 0.2 | At traffic signals turn right onto Newtownpark Avenue - R113 | R113 | 3.0 |
| 2.1 | At traffic signals continue forward onto Leopardstown Road - R113 (signposted Leopardstown) | R113 | 5.1 |
| 1.2 | At roundabout take the 2nd exit onto Leopardstown Road - R113 | R113 | 6.4 |
| 0.7 | At roundabout take the 2nd exit, then join the M50 motorway (signposted M50 Northbound) | M50 | 7.1 |
| 18.0 | Leave the M50 at junction 7, then merge onto Lucan Road - N4 (signposted Sligo) | N4 | 25.1 |
| 6.6 | Continue forward onto the M4 (signposted Sligo) | M4 | 31.7 |
| 28.0 | Toll Plaza | M4 | 59.7 |
| 18.6 | Continue forward onto the N4 (signposted Sligo) | N4 | 78.4 |
| 43.3 | At roundabout take 1st exit onto Ballymahon Road - N4 (signposted Sligo) | N4 | 121.7 |
| 0.5 | At roundabout take 2nd exit onto the N4 (signposted Sligo) | N4 | 122.1 |
| 9.8 | At roundabout take 2nd exit onto the N4 (signposted Sligo) | N4 | 132.0 |
| 2.6 | At roundabout take 1st exit onto the N5 (signposted Westport) | N5 | 134.6 |
| 0.1 | Turn left onto the N5 Entering Longford | N5 | 134.7 |
| 1.9 | Continue forward onto Dublin Street - N5 (signposted Westport) | N5 | 136.5 |
| 0.0 | Turn left onto New Street - N63 | N63 | 136.6 |
| 0.2 | Bear right onto Ballymahon Street - N63 (signposted Westport) | N63 | 136.7 |
| 0.2 | At traffic signals continue forward onto Main Street - N5 (signposted Westport) | N63 | 136.9 |
| 0.2 | At traffic signals turn left onto Richmond Street - N5 | N5 | 137.1 |
| 8.2 | Continue forward on N5 through Termonbarry | N5 | 145.3 |
| 13.6 | Continue forward on N5 entering Strokestown | N5 | 158.9 |
| 0.6 | At roundabout take 1st exit onto French Court - N5 (signposted Westport) | N5 | 159.5 |
| 10.4 | Continue forward on N5 through Tulsk | N5 | 169.9 |
| 11.4 | Continue forward on N5 through Bellanagare | N5 | 181.3 |
| 15.9 | Continue forward on N5 entering Ballaghaderreen | N5 | 197.2 |
| 0.8 | At staggered crossroads veer left then turn sharp right onto N5 (signposted Westport) | N5 | 198.0 |
| 26.0 | Continue forward on N5 (signposted Westport) | N5 | 224.0 |
| 9.2 | Continue forward on N5 through Bohola | N5 | 233.3 |
| 6.8 | Continue forward on N5 through Bellavary | N5 | 240.1 |
| 10.2 | Continue forward onto Dublin Road - N5 Entering Castlebar | N5 | 250.3 |
| 0.3 | At roundabout take 2nd exit onto N5 (signposted Westport) | N5 | 250.6 |
| 0.9 | At roundabout take 2nd exit onto N5 (signposted Westport) | N5 | 251.5 |
| 1.2 | At roundabout take 2nd exit onto Lannagh Road - R310 (signposted Achill, Town Centre) | R310 | 252.7 |
| 0.8 | At roundabout take 2nd exit onto Lannagh Road - R310 | R310 | 253.5 |
| 0.4 | At traffic signals turn left onto Newport Road - R311 (signposted Achill) | R311 | 253.9 |
| 17.5 | Continue forward onto Castlebar Street - R311 Entering Newport | R311 | 271.3 |
| 0.5 | Turn right onto Castlebar Street - N59 | N59 | 271.8 |
| 15.8 | Continue forward on N59 through Mallaranny | N59 | 287.7 |
| 2.1 | Branch left onto Achill Road - R319 (signposted Achill) | R319 | 289.7 |
| 13.3 | Enter Achill Sound via new swing bridge. Achill Cottages are located 2km from the bridge. ACHILL HOLIDAY COTTAGES FROM THE BRIDGE AT ACHILL SOUND CONTINUE ON THROUGH THE VILLAGE OF ACHILL SOUND TILL YOU PAST "MC LOUGHLINS PUB" ON YOUR LEFT. TAKE THE NEXT TURNING ON YOUR RIGHT AFTER APPROX. 0.5 MILES / 500 METRES AND ACHILL HOLIDAY COTTAGES ARE 100 METRES ON YOUR LEFT. |
R319 | 303.0 |