Swimmer profile
Sierra Kobak
Female17-18Rocket Swim ClubOH · CENTRAL
SeasonUSA Swimming season runs Sept – Aug
Event
2015–16
2016–17
2017–18
2018–19
2020–21
2021–22
2022–23
2023–24
2024–25
2025–26
50 Free LCM
55.00
—
37.63
▲ 17.37
36.00
▲ 1.63
30.44
▲ 5.56
29.74
▲ 0.70
28.78
▲ 0.96
29.07
▼ 0.29
29.28
▼ 0.21
—
100 Free LCM
—
—
—
1:21.16
1:06.08
▲ 15.08
1:05.86
▲ 0.22
1:05.94
▼ 0.08
—
1:04.05
▲ 1.89
—
200 Free LCM
—
—
—
—
2:31.53
—
—
—
—
—
400 Free LCM
—
—
—
—
—
—
5:05.83
—
—
—
50 Back LCM
59.53
—
45.70
▲ 13.83
41.29
▲ 4.41
35.52
▲ 5.77
32.14
▲ 3.38
33.38
▼ 1.24
—
—
—
100 Back LCM
—
—
—
1:34.62
1:18.32
▲ 16.30
1:12.51
▲ 5.81
1:12.85
▼ 0.34
1:10.30
▲ 2.55
1:11.44
▼ 1.14
1:09.14
▲ 2.30
200 Back LCM
—
—
—
—
2:54.79
—
—
—
2:37.21
▲ 17.58
—
50 Breast LCM
—
55.85
53.53
▲ 2.32
44.55
▲ 8.98
36.59
▲ 7.96
35.59
▲ 1.00
36.84
▼ 1.25
35.99
▲ 0.85
—
—
100 Breast LCM
—
2:03.36
1:50.85
▲ 12.51
1:43.15
▲ 7.70
1:23.97
▲ 19.18
1:19.82
▲ 4.15
1:19.13
▲ 0.69
1:18.23
▲ 0.90
1:17.54
▲ 0.69
1:18.79
▼ 1.25
200 Breast LCM
—
—
—
—
2:58.96
2:55.20
▲ 3.76
2:53.66
▲ 1.54
2:51.02
▲ 2.64
2:51.35
▼ 0.33
2:53.55
▼ 2.20
50 Fly LCM
—
54.70
46.33
▲ 8.37
—
31.85
▲ 14.48
—
—
—
—
—
100 Fly LCM
—
—
—
—
1:15.52
1:10.74
▲ 4.78
1:09.08
▲ 1.66
1:07.84
▲ 1.24
1:07.76
▲ 0.08
1:09.42
▼ 1.66
200 Fly LCM
—
—
—
—
—
—
—
2:52.61
—
—
200 IM LCM
—
—
—
—
2:39.59
2:36.89
▲ 2.70
2:34.71
▲ 2.18
2:30.33
▲ 4.38
2:32.93
▼ 2.60
2:32.57
▲ 0.36
400 IM LCM
—
—
—
—
—
—
—
5:33.74
—
—
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.