Swimmer profile
Katherine McMahon
Female15-16YMCA Of Greenwich MarlinsCT · EASTERN
SeasonUSA Swimming season runs Sept – Aug
Event
2019–20
2020–21
2021–22
2022–23
2023–24
2024–25
2025–26
50 Free SCY
41.45
39.05
▲ 2.40
34.91
▲ 4.14
32.40
▲ 2.51
29.92
▲ 2.48
28.55
▲ 1.37
28.24
▲ 0.31
100 Free SCY
1:32.35
—
1:22.55
▲ 9.80
1:13.36
▲ 9.19
1:06.31
▲ 7.05
1:05.37
▲ 0.94
1:02.22
▲ 3.15
200 Free SCY
—
—
3:03.29
2:53.60
▲ 9.69
2:26.62
▲ 26.98
2:19.60
▲ 7.02
2:20.77
▼ 1.17
500 Free SCY
—
—
—
—
—
6:19.62
—
50 Back SCY
47.63
45.50
▲ 2.13
39.17
▲ 6.33
38.82
▲ 0.35
34.06
▲ 4.76
34.12
▼ 0.06
—
100 Back SCY
—
—
1:31.93
1:29.80
▲ 2.13
1:15.38
▲ 14.42
1:10.07
▲ 5.31
1:09.71
▲ 0.36
200 Back SCY
—
—
—
—
2:40.04
2:41.40
▼ 1.36
—
50 Breast SCY
48.83
47.26
▲ 1.57
42.29
▲ 4.97
38.77
▲ 3.52
37.04
▲ 1.73
35.21
▲ 1.83
33.55
▲ 1.66
100 Breast SCY
1:51.70
1:36.30
▲ 15.40
1:36.61
▼ 0.31
1:26.55
▲ 10.06
1:19.09
▲ 7.46
1:15.85
▲ 3.24
1:12.11
▲ 3.74
200 Breast SCY
—
—
—
3:12.27
2:51.84
▲ 20.43
2:43.36
▲ 8.48
2:39.49
▲ 3.87
50 Fly SCY
1:01.38
47.99
▲ 13.39
48.49
▼ 0.50
41.91
▲ 6.58
—
—
—
100 Fly SCY
—
—
—
—
—
1:29.58
1:20.56
▲ 9.02
200 Fly SCY
—
—
—
—
—
3:06.55
—
100 IM SCY
1:45.03
1:33.26
▲ 11.77
1:34.66
▼ 1.40
1:25.72
▲ 8.94
1:17.09
▲ 8.63
1:11.37
▲ 5.72
—
200 IM SCY
—
—
—
3:13.39
2:53.64
▲ 19.75
2:34.50
▲ 19.14
2:28.01
▲ 6.49
400 IM SCY
—
—
—
—
—
5:32.78
5:25.98
▲ 6.80
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.