Sligo will progress to the Connacht minor football championship final next month.
They defeated Mayo at the Connacht COE in Bekan to book a date with Roscommon.
The Yeats County's young guns started the stronger and lead by 1-5 to 0-6 at halftime.
Mayo got a goal in the second half of the contest and asked questions of the Sligo defense.
However, Sligo held on for a famous win on a fulltime score of 1-9 to 1-7.