Yes, that's essentially what I've found. The itinerary I've worked out below more or less covers all lines (that I haven't already done) during daylight hours, except Westport-Athlone and the Cork commuter lines. Oh well, I'll have to come back anyway to do the various branches around Dublin (Phoenix Park line, M3 Parkway, Howth) as well as the Luas.You're most welcome. Glad to help.
That is a bit tricky this time of year. Even when I rode (later in the year) I had some bits at night.
At Sligo the railway station is at the top of a small hill and the bus station is at the bottom of the station driveway, which provides good connectivity. Also worth walking into town, which is not far.
As others have posted Manualla Junction is a bit of an odd bird. I departed Dublin under sunny skies, which turned overcast during my connection in Sligo and started to rain while on the bus to Ballina. The dash from Ballina bus station to Ballina railway station was under pouring rain, but I made the connection. However, my connection was a bit longer than what is currently on offer.
The cross platform connection at Manulla Junction could have benefited from a station canopy, but that's OK. I'll dry off.
The tricky bit was how to cover the branch to Wesport (which is a nice place to explore) without consuming too much time? My solution was to stay at the very nice Sheraton in Athlone for two non consecutive nights which also allowed me to store my bag there for my overnight in Cork. Sheraton staff were nice enough to book me into the same suite both nights. Then on the morning of my second stay, I covered the Westport trackage before returning to Dublin. Less efficient than I wanted because of the doubling back, but the Irish Rail DMUs were quite comfortable and well maintained.
Also, does anyone know what the best way is of getting from Heuston station to the airport and to the ferry terminal? Just trying to work out what flights/ferries I can consider.
Wed:
0833 Great Victoria Street-0915 Bangor
0925 Bangor-0957 Lanyon Place
1020 Lanyon Place-1141 Coleraine
1145 Coleraine-1157 Portrush
1302 Portrush-1314 Coleraine
1343 Coleraine-1422 Derry
1538 Derry-1739 Lanyon Place
1805 Lanyon Place-2015 Connolly
Thu:
0905 Connolly-1217 Sligo
1334 Sligo-1504 Ballina (458 bus)
1700 Ballina-1727 Manulla Jn
1733 Manulla Jn-1756 Westport
1820 Westport-2136 Heuston
Fri:
0900 Heuston-0959 Ballybrophy
1008 Ballybrophy-1207 Limerick
1255 Limerick-1323 Limerick Jn
1432 Limerick Jn-1506 Mallow
1525 Mallow-1658 Tralee
1705 Tralee-1905 Cork
1915 Cork-1938 Midleton
1945 Midleton-1955 Glounthaune
2011 Glounthaune-2026 Cobh
2030 Cobh-2055 Cork
Sat:
0800 Cork-0821 Mallow
0843 Mallow-0918 Limerick Jn
0940 Limerick Jn-1125 Waterford
1305 Waterford-1445 Kildare
1559 Kildare-1610 Portarlington
1617 Portarlington-1759 Galway
1810 Galway-1940 Athlone
2012 Athlone-2136 Heuston
Sun:
1000 Heuston-1137 Limerick Jn
1142 Limerick Jn-1203 Limerick
1210 Limerick-1423 Galway
1505 Galway-1737 Heuston
Any improvement suggestions to that appreciated