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BOSTON MARATHON 2025

Shirley Mei

Bib: 28027•F

NY

0:00
0:00
/ mi
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Division (F18-39)
#0 / 5469
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
33:16
Rank: #27126
Start → 5K
33:16 | 10:42/mi
10K· 6.21 mi
1:07:33
Rank: #27148 (-22)
5K → 10K
34:17 | 11:02/mi
15K· 9.32 mi
1:47:44
Rank: #27686 (-538)
10K → 15K
40:11 | 12:56/mi
20K· 12.43 mi
2:28:27
Rank: #27778 (-92)
15K → 20K
40:43 | 13:06/mi
Half· 13.11 mi
2:37:33
Rank: #27808 (-30)
20K → Half
9:06 | 13:20/mi
25K· 15.53 mi
3:09:59
Rank: #27779 (+29)
Half → 25K
32:26 | 13:23/mi
30K· 18.64 mi
3:56:10
Rank: #27853 (-74)
25K → 30K
46:11 | 14:52/mi
20M
4:14:35
Rank: #27803 (+50)
30K → 20M
18:25 | 13:33/mi
21M
4:30:10
Rank: #27805 (-2)
20M → 21M
15:35 | 15:35/mi
35K· 21.75 mi
4:39:31
Rank: #27771 (+34)
21M → 35K
9:21 | 12:30/mi
23M
4:57:27
Rank: #27774 (-3)
35K → 23M
17:56 | 14:19/mi
24M
5:11:58
Rank: #27803 (-29)
23M → 24M
14:31 | 14:31/mi
40K· 24.85 mi
5:27:31
Rank: #27899 (-96)
24M → 40K
15:33 | 18:11/mi
25.2M
5:33:24
Rank: #27923 (-24)
40K → 25.2M
5:53 | 17:04/mi
Finish· 26.22 mi
5:47:54
Rank: #27951 (-28)
25.2M → Finish
14:30 | 14:14/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:37:33
Pace12:01 /mi
2nd Half
Distance13.11 mi
Time3:10:21
Pace14:31 /mi
📊Positive Split: 20.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:50:1533:1610:4233:16
10:42
-
10K
6.21 mi12:24:321:07:3310:5234:17
11:02
+0:20
15K
9.32 mi13:04:431:47:4411:3440:11
12:56
+1:54
20K
12.43 mi13:45:262:28:2711:5740:43
13:06
+0:10
Half
13.11 mi13:54:322:37:3312:019:06
13:20
+0:14
25K
15.53 mi14:26:583:09:5912:1432:26
13:23
+0:03
30K
18.64 mi15:13:093:56:1012:4046:11
14:52
+1:29
20M
20.00 mi15:31:344:14:3512:4418:25
13:33
-1:19
21M
21.00 mi15:47:094:30:1012:5215:35
15:35
+2:02
35K
21.75 mi15:56:304:39:3112:519:21
12:30
-3:05
23M
23.00 mi16:14:264:57:2712:5617:56
14:19
+1:49
24M
24.00 mi16:28:575:11:5813:0014:31
14:31
+0:12
40K
24.85 mi16:44:305:27:3113:1115:33
18:11
+3:40
25.2M
25.20 mi16:50:235:33:2413:145:53
17:04
-1:07
Finish
26.22 mi17:04:535:47:5413:1714:30
14:14
-2:50

Checkpoints & Pacing

📈Pace Line

Pace Progression

Track your pace changes throughout the race. Dot colors mark your quickest to easiest segments, relative to your own pace.

Fastest Pace

10:42 /mi

Average Pace

13:17 /mi

Slowest Pace

18:11 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:16:54

22% of race

Time at Steady Pace

2:53:17

50% of race

Time at Slower Pace

1:37:43

28% of race

Average Pace: 13:16 /mi

Loading chart...
Faster pace (< avg)
Steady pace (≈ avg)
Slower pace (> avg)

🎨Heatmap

Pace Heatmap

Where you sped up and eased off relative to your own pace across the race. Colors are relative to your own range, not to other runners.

Loading...
0mi6.6mi13.1mi19.7mi26.2mi
Pace:
Faster
Steady
Slower

Click or hover over segments to see details

✨Sparklines

Checkpoint Splits with Pace Trends

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi11:50:1533:1610:4233:16
10:42
#27126
10K
6.21 mi12:24:321:07:3310:5234:17
11:02
#27148
15K
9.32 mi13:04:431:47:4411:3440:11
12:56
#27686
20K
12.43 mi13:45:262:28:2711:5740:43
13:06
#27778
Half
13.11 mi13:54:322:37:3312:019:06
13:20
#27808
25K
15.53 mi14:26:583:09:5912:1432:26
13:23
#27779
30K
18.64 mi15:13:093:56:1012:4046:11
14:52
#27853
20M
20.00 mi15:31:344:14:3512:4418:25
13:33
#27803
21M
21.00 mi15:47:094:30:1012:5215:35
15:35
#27805
35K
21.75 mi15:56:304:39:3112:519:21
12:30
#27771
23M
23.00 mi16:14:264:57:2712:5617:56
14:19
#27774
24M
24.00 mi16:28:575:11:5813:0014:31
14:31
#27803
40K
24.85 mi16:44:305:27:3113:1115:33
18:11
#27899
25.2M
25.20 mi16:50:235:33:2413:145:53
17:04
#27923
Finish
26.22 mi17:04:535:47:5413:1714:30
14:14
#27951
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi27126114031140328150(Top 99%)12076(Top 99%)12076(Top 221%)
10K6.21 mi3.10 mi27148-2211444-4111444-4127107(Top 95%)11425(Top 93%)11425(Top 209%)
15K9.32 mi3.11 mi27686-53811770-32611770-32628150(Top 99%)12076(Top 99%)12076(Top 221%)
20K12.43 mi3.11 mi27778-9211842-7211842-7227877(Top 98%)11919(Top 97%)11919(Top 218%)
Half13.11 mi0.68 mi27808-3011857-1511857-1528118(Top 99%)12079(Top 99%)12079(Top 221%)
25K15.53 mi2.42 mi27779+2911846+1111846+1127551(Top 97%)11745(Top 96%)11745(Top 215%)
30K18.64 mi3.11 mi27853-7411897-5111897-5127970(Top 98%)12034(Top 98%)12034(Top 220%)
20M20.00 mi1.36 mi27803+5011875+2211875+2226953(Top 95%)11532(Top 94%)11532(Top 211%)
21M21.00 mi1.00 mi27805-211883-811883-827589(Top 97%)11857(Top 97%)11857(Top 217%)
35K21.75 mi0.75 mi27771+3411870+1311870+1326453(Top 93%)11311(Top 93%)11311(Top 207%)
23M23.00 mi1.25 mi27774-311876-611876-627553(Top 97%)11884(Top 97%)11884(Top 217%)
24M24.00 mi1.00 mi27803-2911899-2311899-2327880(Top 98%)12060(Top 99%)12060(Top 221%)
40K24.85 mi0.85 mi27899-9611960-6111960-6128333(Top 100%)12207(Top 100%)12207(Top 223%)
25.2M25.20 mi0.35 mi27923-2411973-1311973-1328071(Top 99%)12136(Top 99%)12136(Top 222%)
Finish26.22 mi1.02 mi27951-2811987-1411987-1428110(Top 99%)12128(Top 99%)12128(Top 222%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 99%
×21stories
+97ft-345ft

Overall

28150

Females

12076

F18-39

12076

5K→10K

3.1 - 6.2 mi

Top 95%
×5stories
+79ft-138ft

Overall

27107

Females

11425

F18-39

11425

10K→15K

6.2 - 9.3 mi

Top 99%
×3stories
+67ft-78ft

Overall

28150

Females

12076

F18-39

12076

15K→20K

9.3 - 12.4 mi

Top 98%
×5stories
+106ft-86ft

Overall

27877

Females

11919

F18-39

11919

20K→Half

12.4 - 13.1 mi

Top 99%
×2stories
+19ft-37ft

Overall

28118

Females

12079

F18-39

12079

Half→25K

13.1 - 15.5 mi

Top 97%
×4stories
+66ft-88ft

Overall

27551

Females

11745

F18-39

11745

25K→30K

15.5 - 18.6 mi

Top 98%
×9stories
+181ft-148ft

Overall

27970

Females

12034

F18-39

12034

30K→20M

18.6 - 20.0 mi

Top 95%
×5stories
+64ft-50ft

Overall

26953

Females

11532

F18-39

11532

20M→21M

20.0 - 21.0 mi

Top 97%
×8stories
+106ft-24ft

Overall

27589

Females

11857

F18-39

11857

21M→35K

21.0 - 21.8 mi

Top 93%
×7stories
+17ft-86ft

Overall

26453

Females

11311

F18-39

11311

35K→23M

21.8 - 23.0 mi

Top 97%
×5stories
+23ft-63ft

Overall

27553

Females

11884

F18-39

11884

23M→24M

23.0 - 24.0 mi

Top 98%
×6stories
+12ft-82ft

Overall

27880

Females

12060

F18-39

12060

24M→40K

24.0 - 24.9 mi

Top 100%
×1story
+6ft-20ft

Overall

28333

Females

12207

F18-39

12207

40K→25.2M

24.9 - 25.2 mi

Top 99%
×1story
+13ft-16ft

Overall

28071

Females

12136

F18-39

12136

25.2M→Finish

25.2 - 26.2 mi

Top 99%
×2stories
+22ft-21ft

Overall

28110

Females

12128

F18-39

12128

Passing Analysis

Category:
Athletes Passed
434
Passed By
1259
Net Change
-825
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#27126
5K → 10K141163-22#27126#27148
10K → 15K11549-538#27148#27686
15K → 20K33125-92#27686#27778
20K → Half434-30#27778#27808
Half → 25K6839+29#27808#27779
25K → 30K32106-74#27779#27853
30K → 20M533+50#27853#27803
20M → 21M2123-2#27803#27805
21M → 35K351+34#27805#27771
35K → 23M2124-3#27771#27774
23M → 24M837-29#27774#27803
24M → 40K197-96#27803#27899
40K → 25.2M125-24#27899#27923
25.2M → Finish533-28#27923#27951
TOTALS4341259-825
📊

Passing Visuals

Category:
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🔥Passing Intensity

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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing