| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:33.26 | LC Winter Invitational | 2026-01-30 |
| 100m Backstroke | 1:31.26 | LAC - Nothers Fall Invitational | 2025-11-21 |
| 100m Breaststroke | 1:36.49 | LC Winter Invitational | 2026-01-30 |
| 100m Breaststroke | 1:31.02 | LAC - 13 & Over Time Trial | 2026-01-17 |
| 100m Butterfly | 1:36.42 | BAC Team Showdown 2025 | 2025-12-12 |
| 100m Freestyle | 1:17.28 | Western Region Long Course Championships | 2025-06-13 |
| 100m Freestyle | 1:13.56 | BAC Team Showdown 2025 | 2025-12-12 |
| 100m IM | 1:27.13 | LAC - Fall Start Up | 2025-10-19 |
| 200m Backstroke | 3:12.10 | LC Winter Invitational | 2026-01-30 |
| 200m Backstroke | 3:08.26 | LAC – November Fall Time Trial | 2025-11-01 |
| 200m Breaststroke | 3:32.92 | LC Winter Invitational | 2026-01-30 |
| 200m Breaststroke | 3:22.16 | BAC Team Showdown 2025 | 2025-12-12 |
| 200m Freestyle | 2:57.73 | BAC Team Showdown 2025 | 2025-12-12 |
| 200m IM | 3:06.63 | LAC - Dr. Paul Hauch Invitational | 2025-07-05 |
| 400m Freestyle | 6:10.58 | BAC Team Showdown 2025 | 2025-12-12 |
| 400m IM | 6:59.06 | LAC - Dr. Paul Hauch Invitational | 2025-07-05 |
| 50m Backstroke | 42.05 | LC Winter Invitational | 2026-01-30 |
| 50m Backstroke | 39.96 | LAC - Fall Start Up | 2025-10-19 |
| 50m Breaststroke | 42.44 | LC Winter Invitational | 2026-01-30 |
| 50m Breaststroke | 41.66 | LAC - Fall Start Up | 2025-10-19 |
| 50m Butterfly | 44.63 | Western Region Long Course Championships | 2025-06-13 |
| 50m Butterfly | 41.01 | LAC - Nothers Fall Invitational | 2025-11-21 |
| 50m Freestyle | 34.31 | Western Region Long Course Championships | 2025-06-13 |
| 50m Freestyle | 31.98 | LAC - Fall Start Up | 2025-10-19 |
| 800m Freestyle | 13:03.75 | LAC - Nothers Fall Invitational | 2025-11-21 |
Muirhead, Grace's top personal bests include 100m Backstroke (1:33.26), 100m Backstroke (1:31.26), 100m Breaststroke (1:36.49), 100m Breaststroke (1:31.02), 100m Butterfly (1:36.42).
Muirhead, Grace swims for London Aquatic Club.
Muirhead, Grace has competed in 8 meets.