Swimmer profile
Katherine McMahon
Female15-16YMCA Of Greenwich MarlinsCT · EASTERN
SeasonUSA Swimming season runs Sept – Aug
Event
2018–19
2021–22
2022–23
2023–24
2024–25
2025–26
50 Free LCM
55.29
39.12
▲ 16.17
36.93
▲ 2.19
35.30
▲ 1.63
35.74
▼ 0.44
32.27
▲ 3.47
100 Free LCM
—
1:32.99
—
1:19.62
▲ 13.37
1:15.89
▲ 3.73
1:12.60
▲ 3.29
200 Free LCM
—
3:21.54
3:10.69
▲ 10.85
—
—
—
400 Free LCM
—
—
—
5:51.99
—
—
50 Back LCM
1:01.68
45.92
▲ 15.76
—
—
—
—
100 Back LCM
—
1:41.02
1:34.72
▲ 6.30
1:30.31
▲ 4.41
1:27.64
▲ 2.67
—
200 Back LCM
—
—
—
—
3:06.99
—
50 Breast LCM
1:03.32
49.82
▲ 13.50
—
—
41.91
▲ 7.91
40.91
▲ 1.00
100 Breast LCM
—
1:55.47
—
1:34.34
▲ 21.13
1:32.13
▲ 2.21
1:27.17
▲ 4.96
200 Breast LCM
—
—
—
3:20.06
3:20.41
▼ 0.35
3:08.00
▲ 12.41
50 Fly LCM
—
—
45.65
—
—
—
200 IM LCM
—
—
3:33.68
3:11.47
▲ 22.21
3:05.96
▲ 5.51
3:00.24
▲ 5.72
Improvement<0.5s0.5–2s2–5s5s+Slower
📊 All Attempts by Event
Chronological history of every recorded swim. Click an event to expand its attempt list.