Robertson also won gold in the high jump and was part of the James Hargest College team which won the under-15 boys 4x100m relay.
Southland Boys' High School's James McLeay also impressed in the under 15 boys age-group by claiming the 3000m title and he finished third in the open steeplechase.
Wakatipu High School's Eliana Collins was the star in the under-15 girls winning the high jump, finishing second in the triple jump, and third in the 80m hurdles.
In the under-16 girls age group Kennedy Taylor yet again impressed finishing first in the open steeplechase, while Wakatipu High School's Samantha Fookes won the 800m title.