Ballymena Academy Between 1967 and 1974 Gleghorne attended
Ballymena Academy. In 1972–73 she was a member of the academy team that were joint winners of the
Ulster Senior Schoolgirls' Cup. In 1972 Gleghorne was still a schoolgirl at Ballymena Academy when she made her senior debut for
Ireland aged sixteen.
Pegasus Gleghorne played club level field hockey for
Pegasus.
Ulster Gleghorne represented
Ulster at interprovincial level, both as a schoolgirl and as a senior player. By the time she left school in 1974, she had played for the Ulster schoolgirls team for five years in succession. By the age of fifteen, she had made seven senior interprovincial appearances, the first one gained against Leinster in 1970. ==International==