Whyte (18), a pupil at South Otago High School, wants a podium spot at the New Zealand secondary schools championships in Wellington in two weeks.
He raised his expectations by winning the 100m (11.12sec), 200m (22.17sec) and 400m (48.10sec) on Saturday.
His best performance came in his specialist 400m when he ran a personal-best time in the windy conditions.
It lifted him to third spot on this seasons men's 19 national ranking list. But he still needs to reduce this time by a second to qualify for the world junior championships in Barcelona next August.
His potential has been recognised by Athletics New Zealand and he is a member of the 2016 Rio de Janeiro Olympics Development Squad.
Whyte, trained by coach Jim Baird, is now a more confident athlete than when he first made his mark on the Otago scene 18 months ago.
There was no senior meeting in Dunedin on Saturday and Otago athletes travelled north to compete with Canterbury athletes on the all-weather track at Aorangi Park.
Rebekah Greene (Hill City), another Baird-trained athlete, ran from the front to win the women's 800m in 2min 11.53sec.
Greene completed the first 400m lap in a fast 62sec to break up the field but paid the penalty with a slow second lap of 69sec.
Otago's top male middle-distance runner, Daniel Balchin (Caversham), controlled the men's 1500m from the start and won by 9sec in 3min 58sec.
It was a good time considering the strong wind.
His coach, Mike Weddell (Taieri), was equally convincing when winning the masters men's 800m in 2min 30sec.
New Zealand representative Roseanne Robinson (Hill City) easily won the women's 3km walk in 14min 23sec.
Ben Jowsey (Hill City) ran the fastest time of the day when winning the men's 800m in 1min 57.84sec.
Sophie Napper (Taieri) had a useful rehearsal for the national secondary schools championships when she won the women's 19 100m in 12.93sec.
George Woodhouse (Hill City) won the men's 16 100m in 11.52sec and club-mate John Gilmour the men's long jump with 6.17m.
