| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:08.63 | BC Winter Divisionals - North & Interior | 2026-02-20 |
| 100m Breaststroke | 1:23.50 | 2025 Summer Divisionals - North & Interior | 2025-06-27 |
| 100m Butterfly | 1:06.84 | 2026 BC Winter Provincial Championships | 2026-03-05 |
| 100m Freestyle | 58.40 | 2026 BC Winter Provincial Championships | 2026-03-05 |
| 100m IM | 1:11.41 | KAJ Fall Classic | 2025-11-21 |
| 1500m Freestyle | 1:32.61 | 2026 BC Winter Provincial Championships | 2026-03-05 |
| 200m Backstroke | 2:34.29 | VKSC Nolan's Pharmasave Invitational Swim Meet | 2025-04-12 |
| 200m Butterfly | 2:28.37 | 2026 BC Winter Provincial Championships | 2026-03-05 |
| 200m Freestyle | 2:07.12 | 2026 BC Winter Provincial Championships | 2026-03-05 |
| 200m IM | 2:29.30 | 2025 Summer Divisionals - North & Interior | 2025-06-27 |
| 400m Freestyle | 4:40.56 | KCS 32nd MJB Law Classic SCM | 2025-12-12 |
| 400m IM | 5:21.45 | BC Winter Divisionals - North & Interior | 2026-02-20 |
| 50m Backstroke | 31.91 | BC Winter Divisionals - North & Interior | 2026-02-20 |
| 50m Butterfly | 30.32 | VKSC Nolan's Pharmasave Invitational Swim Meet | 2025-04-12 |
| 50m Freestyle | 27.39 | 2026 BC Winter Provincial Championships | 2026-03-05 |
| 800m Freestyle | 9:38.08 | BC Winter Divisionals - North & Interior | 2026-02-20 |
Harwood, Marrin's top personal bests include 100m Backstroke (1:08.63), 100m Breaststroke (1:23.50), 100m Butterfly (1:06.84), 100m Freestyle (58.40), 100m IM (1:11.41).
Harwood, Marrin swims for Columbia Shuswap Selkirks.
Harwood, Marrin has competed in 8 meets.