Julia Kosowski

Age: 11 years old
Age Category: 11-12
Team: Mason Makos Swim Team | Potomac Valley Swimming

Personal Best

Short course distance

Event Time Age Date Standard Next Standard Mason Makos Swim Team Potomac Valley Swimming Eastern Zone USA
Free 50 Y 28.34 11 01/16/2026 A AA: 28.09 (+0.25s | 0.9%) 5 103 417 1,000+
Free 100 Y 1:02.06 11 01/16/2026 A AA: 1:01.39 (+0.67s | 1.1%) 5 96 404 1,000+
50 Free
29.65
29.65
100 Free
32.41
1:02.06
100 Free
1:02.06
Free 200 Y 2:19.38 11 01/16/2026 BB A: 2:19.29 (+0.09s | 0.1%) 4 108 474 1,000+
50 Free
31.81
31.81
100 Free
35.94
1:07.75
100 Free
1:07.75
150 Free
36.85
1:44.60
200 Free
34.78
2:19.38
100 Free
1:11.63
Free 500 Y 6:15.63 11 01/16/2026 BB A: 6:14.49 (+1.14s | 0.3%) 3 129 476 1,000+
50 Free
32.28
32.28
100 Free
37.25
1:09.53
100 Free
1:09.53
150 Free
38.52
1:48.05
200 Free
38.84
2:26.89
100 Free
1:17.36
250 Free
39.34
3:06.23
300 Free
39.48
3:45.71
100 Free
1:18.82
350 Free
39.03
4:24.74
400 Free
37.86
5:02.60
100 Free
1:16.89
450 Free
36.94
5:39.54
500 Free
36.09
6:15.63
100 Free
1:13.03
Free 1000 Y 13:21.30 11 01/03/2026 BB A: 12:53.79 (+27.51s | 3.4%) 3 40 133 465
50 Free
34.95
34.95
100 Free
38.92
1:13.87
100 Free
1:13.87
150 Free
40.35
1:54.22
200 Free
40.98
2:35.20
100 Free
1:21.33
250 Free
41.32
3:16.52
300 Free
41.05
3:57.57
100 Free
1:22.37
350 Free
39.83
4:37.40
400 Free
41.86
5:19.26
100 Free
1:21.69
450 Free
41.33
6:00.59
500 Free
41.21
6:41.80
100 Free
1:22.54
550 Free
41.10
7:22.90
600 Free
42.06
8:04.96
100 Free
1:23.16
650 Free
41.58
8:46.54
700 Free
39.25
9:25.79
100 Free
1:20.83
750 Free
40.62
10:06.41
800 Free
40.34
10:46.75
100 Free
1:20.96
850 Free
40.73
11:27.48
900 Free
39.89
12:07.37
100 Free
1:20.62
950 Free
40.35
12:47.72
1000 Free
33.58
13:21.30
100 Free
1:13.93
Back 50 Y 32.07 11 01/16/2026 A AA: 31.79 (+0.28s | 0.9%) 4 48 212 825
Back 100 Y 1:07.70 11 01/16/2026 AA AAA: 1:06.19 (+1.51s | 2.2%) 3 47 170 616
50 Back
32.65
32.65
100 Back
35.05
1:07.70
100 Back
1:07.70
Back 200 Y 2:27.63 11 12/04/2025 A AA: 2:27.49 (+0.14s | 0.1%) 2 36 157 432
50 Back
34.92
34.92
100 Back
37.99
1:12.91
100 Back
1:12.91
150 Back
38.59
1:51.50
200 Back
36.13
2:27.63
100 Back
1:14.72
Breast 50 Y 39.81 11 10/25/2025 BB A: 37.69 (+2.12s | 5.3%) 10 229 797 1,000+
Breast 100 Y 1:27.12 11 02/07/2026 BB A: 1:22.19 (+4.93s | 5.7%) 10 250 829 1,000+
50 Breast
40.72
40.72
100 Breast
46.40
1:27.12
100 Breast
1:27.12
Fly 50 Y 33.91 11 12/04/2025 BB A: 31.59 (+2.32s | 6.8%) 11 259 953 1,000+
Fly 100 Y 1:20.11 11 02/07/2026 B BB: 1:18.89 (+1.22s | 1.5%) 9 248 885 1,000+
50 Fly
35.87
35.87
100 Fly
44.24
1:20.11
100 Fly
1:20.11
IM 100 Y 1:10.52 11 01/16/2026 A AA: 1:09.99 (+0.53s | 0.8%) 4 65 245 816
50 IM
32.88
32.88
100 IM
37.64
1:10.52
100 IM
1:10.52
IM 200 Y 2:35.87 11 01/16/2026 A AA: 2:30.99 (+4.88s | 3.1%) 6 103 403 1,000+
50 Fly
34.22
34.22
100 Back
38.79
1:13.01
100 IM
1:13.01
150 Breast
47.39
2:00.40
200 Free
35.47
2:35.87
100 IM
1:22.86

Long course distance

Event Time Age Date Standard Next Standard Mason Makos Swim Team Potomac Valley Swimming Eastern Zone USA

Above are the fastest times that Julia Kosowski has achieved in her swimming career. For each event, you can find Julia's best time, the corresponding time standard, as well as how much faster Julia needs to be to reach the next level. The last columns provide Julia rankings at the team and LSC levels. These rankings are based on the Julia's personal best, her current age category, and team; and are calculated from all the meets results.

Disclaimer: This Website is not affiliated with USA Swimming or any Local Swim Committee. The rankings and times displayed on this website are unofficial and should not be viewed as such. We update our information regularly, but we cannot guarantee that the data is accurate, timely, or complete. The only purpose of this website is entertainment. None of the information here should be used for university admission applications.