| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:30.62 | AA AGD Meet & Nova Tech #3 Central | 2026-01-24 |
| 100m Breaststroke | 1:49.89 | AA AGD Meet & Nova Tech #3 Central | 2026-01-24 |
| 100m Butterfly | 1:27.09 | 2026 AA & AAA Winter Champs | 2026-03-05 |
| 100m Freestyle | 1:16.35 | 2025 Candy Cane Invitational | 2025-12-12 |
| 100m IM | 1:29.62 | 2025 DAL Sprint Meet | 2025-10-19 |
| 200m Backstroke | 3:02.34 | 2026 AA & AAA Winter Champs | 2026-03-05 |
| 200m Breaststroke | 3:53.70 | Age Group Development #3 | 2025-11-22 |
| 200m Butterfly | 3:20.50 | 2026 AA & AAA Winter Champs | 2026-03-05 |
| 200m Freestyle | 2:47.45 | 2025 Candy Cane Invitational | 2025-12-12 |
| 200m IM | 3:07.36 | 2026 AA & AAA Winter Champs | 2026-03-05 |
| 400m Freestyle | 6:21.18 | AGD Distance Meet North | 2025-11-09 |
| 400m IM | 7:01.28 | AGD Distance Meet North | 2025-11-09 |
| 50m Backstroke | 41.02 | AA AGD Meet & Nova Tech #3 Central | 2026-01-24 |
| 50m Breaststroke | 47.34 | Age Group Development #3 | 2025-11-22 |
| 50m Butterfly | 36.20 | 2026 AA & AAA Winter Champs | 2026-03-05 |
| 50m Freestyle | 35.01 | 2025 DAL Sprint Meet | 2025-10-19 |
Keirstead, Madelynn's top personal bests include 100m Backstroke (1:30.62), 100m Breaststroke (1:49.89), 100m Butterfly (1:27.09), 100m Freestyle (1:16.35), 100m IM (1:29.62).
Keirstead, Madelynn swims for Sackville Waves Aquatic Team.
Keirstead, Madelynn has competed in 8 meets.