| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Freestyle | 1:34.96 | Sask Age Group Racing Series #3 South Div | 2026-03-07 |
| 100m Freestyle | 1:33.97 | Winter Solstice | 2025-11-29 |
| 200m Breaststroke | 4:25.03 | Winter Solstice | 2025-11-29 |
| 200m Freestyle | 3:34.90 | Sask Age Group Racing Series #3 South Div | 2026-03-07 |
| 200m Freestyle | 3:33.27 | Norm Banfield Memorial Open Development Meet | 2025-10-03 |
| 200m IM | 3:47.91 | 2026 Sask racing Series South Division | 2025-12-06 |
| 25m Freestyle | 18.62 | 2026 Sask Racing Series #1-South Div | 2025-11-02 |
| 50m Backstroke | 43.33 | Saskatchewan Racing Series #4 – South Division | 2026-04-25 |
| 50m Breaststroke | 51.71 | Saskatchewan Racing Series #4 – South Division | 2026-04-25 |
| 50m Butterfly | 47.58 | Sask Age Group Racing Series #3 South Div | 2026-03-07 |
| 50m Butterfly | 45.26 | Saskatchewan Racing Series #4 – South Division | 2026-04-25 |
| 50m Freestyle | 40.91 | Norm Banfield Memorial Open Development Meet | 2025-10-03 |
Montague, Lennon's top personal bests include 100m Freestyle (1:34.96), 100m Freestyle (1:33.97), 200m Breaststroke (4:25.03), 200m Freestyle (3:34.90), 200m Freestyle (3:33.27).
Montague, Lennon swims for Flatland Swimming.
Montague, Lennon has competed in 7 meets.