A little boy's dreams were made when all of his classmates ran with him at a school athletics carnival before hoisting him on their shoulders.

Callum De Bortoli, a Year 7 student at St Joseph's College in Hunters Hill, Sydney, suffers from global development delay, a condition that causes him to have low muscle tone, delayed speech and learning difficulties.

He started high school this year as a full-time boarder, joining his older brother Alex and tackling the challenges of his new school life head-on.

The 13-year-old doesn't let his condition slow him down, and his performance at the school's recent athletics carnival brought his classmates and spectators to their feet.

Callum was captured on video running at the back of the pack during the 1,500m race.

Callum De Bortoli (pictured center) running with his classmates at the St Joseph's College Hunters Hill athletics carnival

Despite the grueling task, Callum didn't stop the whole way through the race - and his classmates ran onto the track with him to celebrate his achievement.

Students surrounded him throughout the final straight, cheering him through to the finish line where he was hoisted up on to his classmates shoulders, personifying the college motto of 'you'll never walk alone'.

Earlier, Callum ran in the 100m race, and followed on with the 200m despite warnings from teachers and officials that he should rest.

Callum (pictured middle right) racing to the finish line with his peers

His mother Jennifer De Bortoli told Daily Mail Australia her son has always had a strong sense of drive and determination.

'Callum doesn't have any limitations,' Ms De Bortoli said.

'Everyone who comes into contact with Callum takes something away with them.

'He always gives things a go. His limitations are set by him and he takes things as they come with a very mature attitude.'

Callum is very popular among his peers and is the manager of the boarders rugby team, providing shoulder massages for players on the interchange bench and giving encouragement before they take the field.

Callum (pictured center) is the manager of the boarders rugby team

Callum (pictured center) is very well like by his peers and is embracing all the challenges involved with starting high school

'He's very well liked by all of his peers and doesn't get worked up about anything,' the proud mother said.

The heart-warming display from Callum's peers and the camaraderie of the group has given Ms De Bortoli comfort in her decision sending Callum to the boarding school.

'It was a very special day for everyone, staff, students and spectators alike, not to mention the feeling that we as his parents have about the love and care he receives at Joeys.'