Dean Casey from Ennis Track Club in Co Clare, the Irish U18 champion, not only won the U20 men's race at the Celtic International and Home International held in Stirling, Scotland but led the Irish team to victory.
Casey was a member of the U17 team at the same race last year.
Backing him up were Daniel Stone of Raheny Shamrock second and Miceal McCaul of St Colman's CBS Newry 1 who finished 2th.
Ireland's other winner was Claire Fagan of Mullingar Harriers who won the women's U23 title, with the women's team finishing runners-up behind host nation Scotland.
Making up the team were Aoife O'Brien of Westport AC, Sorcha McAlister of Dublin University Harriers and Eilish O'Grady of St Michael's AC who packed well to finish fifth, sixth and seventh.
Patrick McNiff of Banbridge AC finished second in the U23 men's race for Northern Ireland, with the Irish men, led by David McGlynn of Waterford AC in 5th place, finishing second. The Irish U20 women's team finished third, with Northern Ireland fourth.
Irish international athlete Fionnuala Ross of Armagh AC, who is based in Scotland, finished fifth in a competitive women's senior race won by England's Kate Avery.
A large group of young athletes from Mullingar Harriers travelled to the race, coming in the U13, U15 and U17 races, along with teams from St Senan's AC in Kilkenny and Dooneen AC in Cork.
An impressive fourth in the boys' U17 Celtic race was Sean McGinley of Olympian AC who was running for the Northern Ireland development squad.