She led from the start and won the South Island secondary schools title by 8.6sec in a time of 8min 28.35sec.
McBride teamed with Heather Duggan to win the girls lightweight under-18 double sculls in 8min 06.32sec.
It is a new event on the racing programme for the championships and the duo finished ahead of St Margarets College and Wakatipu High School.
The Kavanagh College girls later finished second in the under 16 heavyweight double sculls in 7min 59.36sec.
It is the event in which they won a bronze medal in the girls under-15 event at last season's Maadi Cup on Lake Karapiro.
It was a double win for the St Kevin's girls eight of Johanna and Caitlan Kearney, Bethany Robertson, Georgia Tangney, Eilee Robinson, Lucy Fauth, Katherine Hope, Loren Haggerty and cox Sophie Moynihan.
They led from start to finish to win the under-18 eight by 1 lengths ahead of Christchurch Girls' and Rangi Ruru in 6min 58.25sec.
They also won the under-17 eight in 7min 00.64sec.
Hope is the only newcomer in the crew that won the girls under-16 eight at last years Maadi Cup regatta.
The Dunstan under-18 boys novice double sculls of Reed Frewen and Jordan Kane narrowly won the title ahead of the Mount Aspiring crew of James Redai and Jamie Bowley in 7min 42.22sec.
Frewen and Danyon Trask won the under-15 double sculls in 7min 42.02sec.
The open double sculls event was won by the Wakatipu High School pair of Alex Hall and Michael Foley in 7min 33.7sec.
Hall and Foley won two more gold medals in partnership with Matt Nicholson, Marco Dyson and cox Josh Speight in the quadruple sculls (7min 12sec) and the four (7min 29.83sec).
Saasha Bruce (Mount Aspiring College), who won a silver medal at last year's Maadi Cup, came second in the girls under-18 single sculls in 8min 37.56sec.
James McNicol (Waitaki Boys) was second in the boys under-16 single sculls in 7min 57.90sec and Jack O'Leary (Kavanagh) third in 8min 01.11sec.
Kyle Harris (Dunstan) was runner-up in the boys under-17 single sculls in 7min 54.79sec.
Grace Scown (St Hildas) was third in the girls under-18 single sculls in 8min 42.75sec.
Scown and Anna McAslan (St Hildas) were second in the girls under-18 double sculls in 8min 00.38sec.
The crew won a bronze medal at the national championships on Lake Ruataniwha last month.
The Mount Aspiring boys under-18 novice quadruple sculls of James Redai, Elliott Meldrum, Jarrod Wellman, Jamie Bowley and cox Bradley Jackson were second in 7min 24.08sec.
The Otago Boys under 15 eight was third in 6min 54.54sec.
Dunstan was second in the boys under 16 quadruple sculls in 7min 08.14sec.
