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Mayumi So

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FemaleILRockford Marlins Swim Club

Also swam for YMCA of Rock River Valley Stingrays (2025), Unattached (2025). Best times below include every one of them.

23 events·124 swims·28 meets·Last raced Jun 14, 2026
50 Breast LCM48.15
FastestField
ILROC
Team
1
of 4
IL
LSC
27
of 688
IL
State
27
of 688
Central
Zone
127
of 3,346
USA
National
754
of 14,423
Girls 10 & Under · best in age group · set Jun 2026Full board
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Select a time standard above to see which events you qualify for.

Best Times
100 Fly
SCY9 swims
BBBAAAAAAAAAA1.42 to AA
#28 IL#600 USA
BEST

1:22.41

2026-05-03

LCM4 swims
BBBAAAAAAAAAA3.11 to AA
#17 IL#572 USA

1:35.30

2026-06-14

50 Fly
SCY16 swims
BBBAAAAAAAAAA0.50 to AA
#883 USA#1 ILROC

35.59

2026-05-03

LCM5 swims
BBBAAAAAAAAAA1.03 to AA
#27 IL#834 USA

40.52

2026-06-13

50 Breast
SCY13 swims
BBBAAAAAAAAAA0.59 to A
#271 Central#1,285 USA

43.38

2026-05-03

LCM5 swims
BBBAAAAAAAAAA1.66 to AA
#127 Central#754 USA

48.15

2026-06-12

200 IM
SCY2 swims
BBBAAAAAAAAAA3.92 to BB
#732 Central#3,175 USA

3:22.71

2025-10-19

LCM2 swims
BBBAAAAAAAAAA8.80 to AA
#28 IL#916 USA
BEST

3:21.89

2026-06-12

100 Back
SCY2 swims
BBBAAAAAAAAAA1.68 to A
#347 Central#1,488 USA
BEST

1:23.97

2026-05-03

LCM4 swims
BBBAAAAAAAAAA4.37 to AA
#37 IL#1,079 USA

1:34.46

2026-05-17

500 Free
SCY1 swim
BBBAAAAAAAAAA15.37 to BB
#368 Central#1,696 USA

8:00.46

2025-07-18

LCM1 swim
BBBAAAAAAAAAA13.76 to A
#27 IL#687 USA
BEST

6:28.65

2026-06-06

200 Free
SCY2 swims
BBBAAAAAAAAAA13.55 to A
#616 Central#2,486 USA

2:51.94

2025-10-26

LCM2 swims
BBBAAAAAAAAAA4.99 to A
#270 Central#1,465 USA
BEST

3:05.38

2026-05-17

100 Breast
SCY13 swims
BBBAAAAAAAAAA2.18 to A
#277 Central#1,298 USA
BEST

1:35.77

2025-11-23

LCM5 swims
BBBAAAAAAAAAA1.01 to A
#32 IL#1,213 USA

1:49.40

2026-06-06

50 Back
SCY9 swims
BBBAAAAAAAAAA1.74 to A
#632 Central#2,514 USA

39.73

2026-02-14

LCM4 swims
BBBAAAAAAAAAA0.03 to A
#265 Central#1,234 USA

43.62

2026-06-06

100 IM
SCY6 swims
BBBAAAAAAAAAA5.45 to A
#534 Central#2,497 USA

1:27.54

2026-01-10

100 Free
SCY5 swims
BBBAAAAAAAAAA4.79 to A
#623 Central#2,526 USA
BEST

1:16.28

2026-02-15

LCM2 swims
BBBAAAAAAAAAA6.22 to BB
#1,279 Central#6,039 USA

1:39.21

2025-07-11

50 Free
SCY8 swims
BBBAAAAAAAAAA2.42 to A
#849 Central#3,492 USA

34.51

2026-02-15

LCM4 swims
BBBAAAAAAAAAA1.94 to A
#529 Central#2,557 USA
BEST

38.53

2026-06-07

Explore

USA Swimming time standards — 10 & Under Girls