Before focusing on track and distance racing, Scarlett excelled in competitive swimming, gymnastics and springboard diving. She still currently holds 13 Auckland age group swimming records and was also part of the New Zealand team that won the New South Wales Gymnastics Championships.
In the 2021-2022 season, Scarlett won gold at the North Island Cross Country Champs and the NZ U16 Road Racing Championships. Academically, she excelled by tackling Year 11 (NCEA Level 1) mathematics while only in Year 9. The 2022-2023 season saw her dominate the NZ Secondary Schools Year 9, 3km Road Race, retain her North Island Cross Country title, and still achieve top scholar status in Year 12 (NCEA Level 2) calculus, despite only being in Year 10.
Scarlett's achievements in the 2023-2024 season are even more impressive. She won the Auckland Marathon 5km race, triumphed in the U20 Women 5,000m at the Agency New Zealand Championships, won the NZ 5km Road Champs and was a double medallist at the Oceania Championships (gold in the 3000m and bronze in the 1500m). Additionally, she earned bronze at both the NZ Schools Cross Country Champs and the NZ Club Cross Country Champs and won the North Island U18/20 Cross Country Champs. She was also part of the U18 New Zealand team that won gold the Australian Cross Country Champs, all whilst studying Year 13 (NCEA Level 3) calculus as a Year 11 student.
Kicking off the 2024/2025 track season, Scarlett ran a solo 4m26 for 1500m on a cold and windy October evening at Mt Smart. Two weeks later, she clocked a blistering 9m40 for 3000m before improving to 9m35 while claiming victory at the December 2024 NZ Secondary Schools 3000m. She carried that momentum into 2025, running 9m27 at the Sydney Classic 3000m and an outstanding 4m22 in the Sir Graeme Douglas Classic 1500m. During February, this placed her Number 3 in the world for u18 year olds.
Her consistent podium finishes across national championships in road, cross country, and track highlight her dedication to excellence.