St Mary's College remain on course to claim their first title since 2006, thanks to a Conor Gleeson goal 11 minutes from time that saw off St Colman's in their quarter-final at Tuam Stadium.
A powerful display from John Doran helped the Galway side into a 0-4 to 0-3 interval lead despite playing into a gale. James Shaughnessy drew Colman's level minutes after the restart, but scores from James Casserley and Gleeson's goal put Mary's back in front before Ryan Quirke goaled a late consolation penalty.
Scorers -- St Mary's: J Casserley, C Ó Laoi (1f) 0-3 each, C Gleeson 1-0, F Ó Bearra (1f), C Ó Conáire 0-1 each. St Colman's: R Quirke 1-2 (1-0 pen, 2f), J Shaughnessy 0-2, A Gallagher, C Egan (f) 0-1 each.
St Mary's -- R Lavelle; J Wynne, B Madden, M Ó Bearra; M Ó Curraoin, E Walsh, B Bohan; J Doran, M Mulkerrins; J Casserley, F Ó Bearra, C Ó Conáire; C Gleeson, C Ó Laoi, M Upton.
Subs: B McEntee for Wynne (13), T Ward for Ó Conáire (42), A O'Toole for Doran (54), D Kerr for F Ó Bearra (59).
St Colman's -- D Grant; C Kelly, M Waldron, A Butler; K Lynch, N Pilbrow, J Commins; R Quirke, S Gallagher; D Connolly, I Stagg, D O'Reilly; J Shaughnessy, A Gallagher, S Coen. Subs: M O'Neill for Commins (24), C Egan for O'Reilly (h-t), J Stretton for Gallagher (h-t), C McDermott for Shaughnessy (59).
Ref -- D Hunt (Roscommon).