| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:33.30 | Western Region Long Course Championships | 2025-06-13 |
| 100m Breaststroke | 1:37.14 | Scar Pan Am Winter Classic | 2026-01-16 |
| 100m Breaststroke | 1:35.50 | Wilmot Aces Spring Classic 2026 | 2026-03-13 |
| 100m Butterfly | 1:29.61 | Wilmot Aces Spring Classic 2026 | 2026-03-13 |
| 100m Freestyle | 1:17.39 | Western Region Long Course Championships | 2025-06-13 |
| 100m Freestyle | 1:15.70 | Wilmot Aces Spring Classic 2026 | 2026-03-13 |
| 100m IM | 1:25.98 | GMAC Dash for Cash | 2025-12-05 |
| 200m Backstroke | 3:17.29 | Wilmot Aces Fall Invitational | 2025-11-15 |
| 200m Breaststroke | 3:40.50 | LC Winter Invitational | 2026-01-30 |
| 200m Breaststroke | 3:31.17 | Wilmot Aces Spring Classic 2026 | 2026-03-13 |
| 200m Freestyle | 2:51.61 | Scar Pan Am Winter Classic | 2026-01-16 |
| 200m Freestyle | 2:42.79 | Wilmot Aces Spring Classic 2026 | 2026-03-13 |
| 200m IM | 3:12.71 | Wilmot Aces Spring Classic 2026 | 2026-03-13 |
| 50m Backstroke | 39.78 | Scar Pan Am Winter Classic | 2026-01-16 |
| 50m Breaststroke | 43.53 | Western Region Long Course Championships | 2025-06-13 |
| 50m Breaststroke | 43.69 | Wilmot Aces In House Meet 2025 | 2025-12-20 |
| 50m Butterfly | 36.48 | LC Winter Invitational | 2026-01-30 |
| 50m Butterfly | 36.57 | Wilmot Aces Spring Classic 2026 | 2026-03-13 |
| 50m Freestyle | 33.43 | Scar Pan Am Winter Classic | 2026-01-16 |
| 50m Freestyle | 32.57 | GMAC Dash for Cash | 2025-12-05 |
Harcourt, Mabel's top personal bests include 100m Backstroke (1:33.30), 100m Breaststroke (1:37.14), 100m Breaststroke (1:35.50), 100m Butterfly (1:29.61), 100m Freestyle (1:17.39).
Harcourt, Mabel swims for Wilmot Aquatic Aces Club.
Harcourt, Mabel has competed in 7 meets.