Eternal Thompson was the overall winner of her age group, taking gold in the 50m and 100m backstroke and 50m breaststroke. She broke the Wairarapa under-10 girls 100m breaststroke record in claiming gold.
Thompson also picked up silver medals in the 50m butterfly and 100m freestyle and broke her Wairarapa record in the 100m butterfly where she placed third. She set the Wairarapa record in the 200m freestyle, the first time that event's standard time has been met.
Kate Sims won gold medals in the 11-year girls' 50m, 100m and 200m butterfly events and in the 400m individual medley, all in personal best times. She took silver in the 400m freestyle and was the overall runner-up for her age group.
Emma Samuel won gold in the 50m backstroke in 32.17s, smashing the Wairarapa under- 14 girls record by 2s. She carved 1.5s off the 100m backstroke record which has stood since 2002, winning bronze in that event.
Noemi Leinfellner (11) won silver in the 200m individual medley and 100m freestyle and bronze in the 400m freestyle and 100m breaststroke, all in personal best times. Ben Ruback (17), Mitchell Cockburn (12) and Oliver Donaldson (11) each won two bronze medals.
Masterton head coach Anna Kitching said: "The meet was a valuable learning experience because it simulated national meets with heats and finals for all age groups.
"It's great to see some remarkable younger talent coming through now at a time when our most senior member, Ben Ruback, is moving on to university and to train with Wellington's Capital club," Kitching said.
Masterton team members also achieved numerous national qualifying times over the long weekend.
The club will field teams at the New Zealand junior and age group championships, both to be held in February.