Valleys' clash with Blarney drew an incredible crowd, for a club game, of 10,749 to the stunning stadium, who soaked up the sun and the hurling on a historic occasion for Cork GAA.
The Innishannon outfit were worthy victors of the Premier Intermediate Hurling Championship tie against the Mid Cork side, 1-21 to 1-8. Cork senior panellist O'Leary was the main man for Valleys, shooting 0-12, five from play, and had the distinction of shooting the first point from play, the first free and hitting the first wide in the new-look Páirc.
Leesiders will be hoping O'Leary carries that form into next Wednesday's Munster U21 final against Limerick in the Gaelic Grounds, but next up are the All-Ireland senior quarter-finals this Saturday and Sunday.
Clare and Tipperary is set to draw in excess of 30,000 to Saturday's quarter-final, with a 3pm throw-in, while over 40,000 will be there on Sunday, 4pm, for Waterford and Wexford.
The Cork intermediate hurlers will be the first to represent the county in the new Páirc at 2pm on Sunday when they face Kilkenny in the All-Ireland intermediate final. It will actually be the team's first game this season, as Cork were the only Munster county to enter the scaled back intermediate grade, though Kilkenny beat Wexford in the Leinster final recently.