Ten-year-old Katie Nutt, from Standlake,won the open age category at the Southern & GLSE Regional Championships at Thorpe Park, Surrey.
Nutt won the trick event, increasing her personal best from 1,410 points to 2,010 points.
She also slalomed consistently, scoring three buoys at 52km/h in both rounds to take the overall title.
The youngster has now been invited to train with the British squad in August.
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