The side from the north-west won 3-0 against MGL North from Dublin to get their hands on this year’s Under-13 Gaynor Cup.
Orna Murphy got a brace in the first half to put Sligo/Leitrim 2-0 up at half time, while Keeva Flynn scored from the penalty spot after the break to leave the result in no doubt.
Earlier in the afternoon, South Tipperary picked up the Shield when they defeated Galway 2-0 in their competition, while Limerick Desmond captured the Plate by seeing off Mayo by five goals to nil.
Wexford claimed the Bowl by winning their game against Kildare 3-2 and NECSL won the Trophy 4-2 on penalties after their tie with Clare ended 1-1 in ordinary time.
Placing matches also took place throughout the day to decide how the teams would be ranked - MGL South took third spot overall in the competition, while Cork came in fourth.
2019 Under 13 Fota Island Resort FAI Gaynor Tournament Results
Gaynor Cup Final:
MGL North 0-3 Sligo/Leitrim
Shield Final:
Galway 0-2 South Tipperary
Plate Final:
Mayo 0-5 Limerick Desmond
Bowl Final:
Wexford 3-2 Kildare
3rd/4th Play-Off:
Cork 0-4 MGL South
7th/8th Play-Off:
Donegal 1-0 Midlands
11th/12th Play-Off:
Waterford 1-2 North Tipperary
15th/16th Play-Off:
Limerick County 2-0 Inishowen
Trophy Final:
NECSL 1-1 Clare (NECSL won 4-2 on penalties)
Trophy 3rd/4th Play-Off:
Kerry 0-2 Longford