| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:38.03 | 2025 Ryan Downing Memorial Swim Meet | 2025-11-21 |
| 100m Breaststroke | 2:00.27 | 2025 Ryan Downing Memorial Swim Meet | 2025-11-21 |
| 100m Freestyle | 1:28.05 | 2025 Ryan Downing Memorial Swim Meet | 2025-11-21 |
| 100m IM | 1:46.02 | 2025 Ryan Downing Memorial Swim Meet | 2025-11-21 |
| 200m Freestyle | 3:13.57 | 2025 Ryan Downing Memorial Swim Meet | 2025-11-21 |
| 50m Backstroke | 43.80 | 2025 Ryan Downing Memorial Swim Meet | 2025-11-21 |
| 50m Breaststroke | 1:00.68 | New Years Time Trial | 2026-01-16 |
| 50m Butterfly | 50.47 | New Years Time Trial | 2026-01-16 |
| 50m Freestyle | 38.05 | New Years Time Trial | 2026-01-16 |
Miller, Mackenzie's top personal bests include 100m Backstroke (1:38.03), 100m Breaststroke (2:00.27), 100m Freestyle (1:28.05), 100m IM (1:46.02), 200m Freestyle (3:13.57).
Miller, Mackenzie swims for Whitehorse Glacier Bears.
Miller, Mackenzie has competed in 3 meets.