| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:36.20 | UCSC February Invitational | 2026-02-21 |
| 100m Breaststroke | 1:45.76 | Winter Festival | 2026-01-23 |
| 100m Butterfly | 1:40.85 | UCSC February Invitational | 2026-02-21 |
| 100m Freestyle | 1:19.58 | 2025 KSC SC Invitational | 2025-11-21 |
| 100m IM | 1:33.43 | Winter Festival | 2026-01-23 |
| 200m Backstroke | 3:32.80 | Sandy Ferris Age Group Food Bank Challenge 2025 | 2025-12-19 |
| 200m Breaststroke | 3:41.05 | 2025 KSC SC Invitational | 2025-11-21 |
| 200m Freestyle | 3:00.96 | Jack Frost 2025 | 2025-10-24 |
| 200m IM | 3:22.64 | UCSC February Invitational | 2026-02-21 |
| 400m Freestyle | 5:55.50 | UCSC February Invitational | 2026-02-21 |
| 50m Backstroke | 43.01 | UCSC February Invitational | 2026-02-21 |
| 50m Breaststroke | 47.81 | 2026 Pronghorn Classic | 2026-03-13 |
| 50m Butterfly | 49.33 | Sandy Ferris Age Group Food Bank Challenge 2025 | 2025-12-19 |
| 50m Freestyle | 35.75 | Winter Festival | 2026-01-23 |
Elgie, Lachlan's top personal bests include 100m Backstroke (1:36.20), 100m Breaststroke (1:45.76), 100m Butterfly (1:40.85), 100m Freestyle (1:19.58), 100m IM (1:33.43).
Elgie, Lachlan swims for Glencoe Gators Swim Club.
Elgie, Lachlan has competed in 8 meets.