Arriving on Saturday, the local boys defeated Canberra Grammar School, Bond Pirates and Ambrose Treacy College.

The Highlanders experienced their first and only loss to QLD's Caboolture Snakes in a close match.

Coach Rob Sides was impressed with the three out of four wins on Saturday against all city-based teams.

"We were joint leaders in the division three pool at the end of Saturday but on a count back system we were put back to second place," he said.

Heading into the finals on Sunday, the Highlanders faced Sydney's Kings School.

From the first whistle, Inverell followed their coach's instructions- to lay a strong foundation.

"Kings is traditionally a breeding ground for Wallabies and our boys beat them 35-0. It was impressive, believe me."

Sides praised the boys for dominating the game in every aspect, as well as being great ambassadors for Inverell.

"We were up in their face, our line speed was brilliant; basically we just had them on the back foot right up until the final minute."

The unbelievable result wrapped up what was a spectacular weekend playing in Australia's largest primary school boys event.

The carnival drew 51 teams and more than 1050 players.

"What was so rewarding was the fact the boys performed beyond our expectations, far better than what we could have imagined. I've done four of these carnivals and this has been the most rewarding so far."

The U12s side will kick off club season at Walcha in May. Inverell Junior Rugby Union is still taking registrations for those interested.

After school holidays, the club will resume training every Thursday evening from 5pm at Rugby Park.

For more information head to www.inverellhighlanders.com/jrnrugby