Katharine Costello
Personal records
| Event | Course | Best | Cut | Date | Meet |
|---|---|---|---|---|---|
| 50 Freestyle | SCY | 27.67 | BB+0.28s to A·+2.38s to Sectionals | 2023-01-14 | 2023 Meet of Championsvenue |
| 100 Freestyle | SCY | 1:00.11 | BB+0.62s to A·+5.62s to Sectionals | 2024-01-12 | 2024 Meet of Champions |
| 200 Freestyle | SCY | 2:13.19 | BB+5.10s to A·+15.30s to Sectionals | 2023-01-14 | 2023 Meet of Championsvenue |
| 500 Freestyle | SCY | 6:13.14 | BB+28.05s to A·+58.15s to Sectionals | 2023-01-13 | 2023 Meet of Championsvenue |
| 50 Breaststroke | SCY | 30.28 | AAAA·Sectionals ✓+0.49s to Futures | 2026-03-15 | Region VIII Speedo Spring Sectionalsvenue |
| 100 Breaststroke | SCY | 1:04.61 | AAAA·Futures ✓+1.52s to Winter JNs | 2026-03-14 | Region VIII Speedo Spring Sectionalsvenue |
| 200 Breaststroke | SCY | 2:24.62 | AAA+4.03s to AAAA·Sectionals ✓+1.93s to Futures | 2026-03-12 | Region VIII Speedo Spring Sectionalsvenue |
| 50 Butterfly | SCY | 32.20 | BB+2.11s to A·+5.51s to Sectionals | 2023-01-15 | 2023 Meet of Championsvenue |
| 200 Individual Medley | SCY | 2:32.09 | BB+8.70s to A·+19.10s to Sectionals | 2024-01-12 | 2024 Meet of Champions |
| 400 Individual Medley | SCY | 5:31.72 | BB+24.73s to A·+47.73s to Sectionals | 2024-01-12 | 2024 Meet of Champions |
| 50 Breaststroke | LCM | 34.49 | AAAA·Futures ✓+0.80s to Jr Nationals | 2026-07-18 | Speedo Summer Sectionals - Central Zone Southvenue |
| 100 Breaststroke | LCM | 1:16.53 | AAA+2.14s to AAAA·Sectionals ✓+0.54s to Futures | 2026-07-17 | Speedo Summer Sectionals - Central Zone Southvenue |
| 200 Individual Medley | LCM | 2:35.85 | AA+5.16s to AAA·+4.56s to Sectionals | 2026-07-18 | Speedo Summer Sectionals - Central Zone Southvenue |
Cuts are USA Swimming single-age motivational standards (B → AAAA) at age 16.
National cuts (Sectionals → Nationals) are the current-season meet qualifying times for the swimmer's zone and age group; ✓ marks the hardest cut already achieved.
Fastest relay legs
| Leg | Course | Time | Start | Relay | Date | Meet |
|---|---|---|---|---|---|---|
| 50 Breaststroke | SCY | 30.40 | flying | 200 Medley Relay (leg 2) | 2026-03-13 | Region VIII Speedo Spring Sectionals |
| 100 Breaststroke | SCY | 1:07.17 | flying | 400 Medley Relay (leg 2) | 2026-03-15 | Region VIII Speedo Spring Sectionals |
| 100 Breaststroke | LCM | 1:17.74 | flying | 400 Medley Relay (leg 2) | 2026-07-18 | Speedo Summer Sectionals - Central Zone South |
Reconstructed from relay split marks. Flat = lead-off (comparable to individual times); flying starts run ~0.5–0.7s fast and are not PRs.
IMX / IMR
IMX 15-16 · SCY
2486 points (4/6 events — incomplete)
| Event | Time | Points |
|---|---|---|
| 500 FR SCY | 6:13.14 | 523 |
| 200 BR SCY | 2:24.62 | 897 |
| 200 IM SCY | 2:32.09 | 549 |
| 400 IM SCY | 5:31.72 | 517 |
| 200 BK SCY | — | 0 |
| 200 FL SCY | — | 0 |
IMR 15-16 · SCY
2134 points (3/5 events — incomplete)
| Event | Time | Points |
|---|---|---|
| 200 FR SCY | 2:13.19 | 591 |
| 100 BR SCY | 1:04.61 | 994 |
| 200 IM SCY | 2:32.09 | 549 |
| 100 BK SCY | — | 0 |
| 100 FL SCY | — | 0 |
Scored against AAAA motivational base times: ordering is exact, absolute points run ~25% above the official USA Swimming scale.
PR splits
100 Freestyle SCY 1:00.11
Front half 28.45s · back half 31.66s
200 Freestyle SCY 2:13.19
Front half 63.63s · back half 69.56s
500 Freestyle SCY 6:13.14
Front half 181.46s · back half 191.68s
100 Breaststroke SCY 1:04.61 RT 0.76s
Front half 30.26s · back half 34.35s
200 Breaststroke SCY 2:24.62 RT 0.76s
Front half 68.48s · back half 76.14s
200 Individual Medley SCY 2:32.09
Front half 73.54s · back half 78.55s
400 Individual Medley SCY 5:31.72
Front half 162.06s · back half 169.66s
100 Breaststroke LCM 1:16.53 RT 0.84s
Front half 35.65s · back half 40.88s
200 Individual Medley LCM 2:35.85 RT 0.86s
Front half 75.03s · back half 80.82s
Reaction time
From electronically-timed starts only (~2% of corpus swims carry a reaction time). PRs with a recorded reaction show an RT chip in the splits section above.
Swim history
Every recorded swim, newest first
| Date | Event | Course | Time | Age | Round | Meet |
|---|
Individual swims with a recorded date and time — including disqualifications — plus reconstructed relay legs (marked). Assembled in the browser from this page’s data.
Progression
Faster times are higher. One card per event, all courses & history.