CHERRYBROOK Carlile Swimming Club last month capped off its best finish at the NSW State Age Championships with a fourth place in the club championship pointscore.
It was a significant achievement for Cherrybrook, which formed five years ago.
They join the state's best performing clubs at the under 13s to 18s level.
A club spokeswoman said the achievement was a big step in the club's development.
"We've invested a lot of time and effort to give our junior swimmers the best opportunity to succeed," the spokeswoman said.
"It's very pleasing to see our top-level coaching has produced a lot of young talented swimmers who are dominating at district and state levels."
Cherrybrook had 27 swimmers in the under 13 to 18s category qualify for the finals, in 39 events.
The club finished the finals with six gold, nine silver and three bronze medals.
One of the gold medal winners to impress at the championships was the Cherrybrook's girls 4 x 50 metre medley relay team.
Brooke Mindham, Siobhan O'Malley, Samantha Ying and Bronte Aiken combined to edge out their nearest rivals by three seconds and win the final with a finishing time of 2mins 3.70 sec.
The result was a big shock for Brooke and her teammates, who were overwhelmed to win their first gold medal on the big stage.
"We were all hugging and celebrating on the pool deck because this is our biggest victory together," Brooke said.
Vincent Dai was another winner, with three gold medals, in the 100-metres butterfly and 50-metre and 100-metre freestyle.
The 15-year-old broke two championship records in his two freestyle finals.