Captain Richard Barrow claimed three of the nine St Columba's tries against Portmarnock at King's Hospital.
St Columba's were especially strong up front. Touchdowns came from Daniel Dodds, Kevin Daly and Barrow inside 16 minutes and it was 33-7 at the interval. Barrow completed his hat-trick in the second half with Jason Horsey (2) and Henry Stiller also scoring.
SCORERS: St Columba's: R Barrow 3 tries; J Horsey 2 tries; M Spiller, P Temple, D Dobbs, K Daly try each; N Quinn 4 cons; M Garcia 2 cons; Portmarnock: G Healy try; S Rice con.
ST COLUMBA'S: M Quinn; K Daly, R Van Rampelberg, J Horsey, A Musgrave; T Reade, H Spiller; R Barrow, B Sadek, P Temple, J Mannion,
D Dobbs, C Lyons, H Gervais, T Nolan. Replacements: M Garcia for Quinn (24 mins), R O'Moore for Gervais (35), W Archer for Reade (45), T Mulhall for Dobbs (54), T Metcalfe for Mannion (54), T Filgate for Van Rampelberg (54).
PORTMARNOCK: M Chester; R Weldon, A Heir, M Gallin, L Murray; G Quill, S Ward; D O'Brien, S Rice S Robinson, G Healy P Gray, L Marqredini, G Conway, B Bergin. Replacements: J Stanley for Heir (13 mins), R Connolly for Healy (43), S Gray for Murray (50), G Murphy for Quill (56), P McCrory for Robinson (60).
Referee: P Dennehy (ARLB).