Every year the event draws teams from some of the state's most prestigious horse sport schools, including several Sydney private schools, as well as a team traveling from Canberra.

The event has been running for 30 years, and this year attracted over 500 riders.

Calrossy equestrian manager Kathy de Jong said the event, which has been running for 30 years and attracts over 500 riders, "is a very special event on the school's calendar."

This year Mrs DeJong travelled with 32 students and 50 horses, and couldn't be prouder of the student's achievements across the board, particularly the defence of the Champion School title.

"We went really well - to win the most successful school seven years in a row is a great achievement," she said.

While every Calrossy rider had a successful tournament, the Champion School crown is judged on the top four point scorers from any one team across the multiple disciplines, with Holly Turnbull, Lara de Jong, Sophie Maynes and Jessie Melbourne coming up trumps.

Holly also took out the individual six bar show jumping event, with a jump of 1.35m on a thoroughbred mare which she has trained herself.

She also led the Calrossy six bar team to be the top placed whole school alongside Molly Baker, Hannah Thurn and Elly Byriell, with another Calrossy team taking out runner-up.

Meanwhile Annabel Dalzell, Vanessa Baker and Matt Kerridge formed part of the overall winning composite team in the six bar, after teaming up with a rider from another school, while Isabelle Burke and Sophie Maynes took out their respective age divisions in the Working Horse Challenge.

Calrossy also claimed five overall age champions in Hamish Palmer, Lara de Jong, Sophie Mayne, Austen Elias and Chloe Scicluna, while Annabel Dalzell, Molly Baker and Jessie Melbourne were Age Champion runners-up.

"Our polocrosse A Division came second, and our second division came fourth in polocrosse which are really good team events," Mrs De Jong said.

"Annabelle Read won Champion Dressage, and we had winners of Hack classes and Rider classes - so we had success and winners over all divisions.

"It was a very successful campaign - to win in that six bar teams was something very special and a really good promotion for the school and a really good team effort."

Equestrian, and horse sports in general, is showing huge growth both locally and nationally in recent years, with Mrs de Jong estimating a third of all Calrossy students "would be involved in horse sports in one way or another."

"Our numbers are remaining fairly consistent in horse sports, even in the drought," she said.

"Numbers were a bit down this year because of the drought, and some of our kids couldn't go because of the expenses, but we managed to keep our numbers up because parents find it such an important event on the calendar - equestrian is huge in Australia."