The Leinster Schools Senior Challenge Cup is the premier rugby union competition for secondary schools affiliated to the Leinster Branch of the IRFU. First held in 1887, the Cup celebrated its 120th anniversary in 2007.
Schools Senior Cup Rugby is divided into 4 tiers in two sections and each cup competition bears a name as follows: Section A Leinster Schools Rugby Senior Development Cup (effectively division 4), Section A Leinster Schools Rugby McMullen Cup (effectively division 3), Section B Leinster Schools Vinnie Murray Cup (effectively division 2), Section B Leinster Schools Senior Challenge Cup (effectively division 1).
Attendances are high for a schoolboy competition, with up to 25,000 present at the final. This match traditionally takes place on Saint Patrick's Day at Lansdowne Road (now known as the Aviva Stadium). In 2008, the final was played at the Royal Dublin Society Grounds (RDS) after Donnybrook proved to be way too small for the 2007 final, (Lansdowne Road was closed for redevelopment) and has been the home since.
The competition has been subject to criticism from various quarters as being "elitist" (as most of the competing schools are fee-paying; in fact only one non fee-paying school has won the cup, De La Salle Churchtown) and for putting undue pressure on its participants. It is also the subject of satire through the Ross O'Carroll Kelly newspaper column and novels. The competition and schools rugby in the four provinces has been praised though with "Irish (rugby) game in debt to schools rugby".
Blackrock College are the most successful school in the Cup's history, having lifted the Cup 68 times, followed by Belvedere College with 11 wins .
Three schools have won the Cup at their first attempt; Blackrock College in the competition's maiden year in 1887, Castleknock College who won the first of their eight Leinster titles at the first time of asking when they defeated Blackrock in the 1913 final and Clongowes Wood College who first won the cup in 1926. St. Fintan's High School are the most recent 'new' school to the compeition, making their debut in 2016/17 season.