Elite will battle for €4m in prize money over two days
Now in its second year the Longines Irish Champions Weekend takes place at Leopardstown on Saturday, September 12 and the Curragh on Sunday, September 13.
Uniquely, five Group 1 races will take place over the two days, making it the most valuable weekend of racing on the Irish calendar. Prize-money is in excess of €4m.
The race programme also includes three Group 2 races, two Group 3 races and four premier handicaps, each worth €150,000, making them the four most valuable flat handicaps in Ireland.
Among the Group 1 races will be the QIPCO Irish Champion Stakes which is likely to see the 2014 winner The Grey Gatsby back in a bid to defend his crown.
This race remains one of the highest-rated races on the international calendar and will be worth €1.1m, an increase of €100,000 on last year.
Group 1 races at the Curragh the following day include the Moyglare Stud Stakes and the Palmerstown House Estate Irish St Leger.
Brian Kavanagh, chief executive of Horse Racing Ireland, said: "Last year's event surpassed all of our expectations.