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BOSTON MARATHON 2023

Shengmei Yu

Bib: 22885•F

CA

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Division (F50-54)
#0 / 1207
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
27:02
Rank: #18905
Start → 5K
27:02 | 8:42/mi
10K· 6.21 mi
53:35
Rank: #18652 (+253)
5K → 10K
26:33 | 8:33/mi
15K· 9.32 mi
1:20:17
Rank: #18559 (+93)
10K → 15K
26:42 | 8:36/mi
20K· 12.43 mi
1:47:39
Rank: #18598 (-39)
15K → 20K
27:22 | 8:49/mi
Half· 13.11 mi
1:53:38
Rank: #18631 (-33)
20K → Half
5:59 | 8:46/mi
25K· 15.53 mi
2:15:27
Rank: #18685 (-54)
Half → 25K
21:49 | 9:00/mi
30K· 18.64 mi
2:44:46
Rank: #18789 (-104)
25K → 30K
29:19 | 9:26/mi
20M
2:57:43
Rank: #18809 (-20)
30K → 20M
12:57 | 9:32/mi
21M
3:07:41
Rank: #18733 (+76)
20M → 21M
9:58 | 9:58/mi
35K· 21.75 mi
3:14:25
Rank: #18691 (+42)
21M → 35K
6:44 | 9:00/mi
23M
3:26:17
Rank: #18666 (+25)
35K → 23M
11:52 | 9:29/mi
24M
3:35:36
Rank: #18675 (-9)
23M → 24M
9:19 | 9:19/mi
40K· 24.85 mi
3:43:28
Rank: #18608 (+67)
24M → 40K
7:52 | 9:12/mi
25.2M
3:46:47
Rank: #18561 (+47)
40K → 25.2M
3:19 | 9:37/mi
Finish· 26.22 mi
3:56:05
Rank: #18576 (-15)
25.2M → Finish
9:18 | 9:08/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:53:38
Pace8:40 /mi
2nd Half
Distance13.11 mi
Time2:02:27
Pace9:20 /mi
📊Positive Split: 7.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:20:2427:028:4227:02
8:42
-
10K
6.21 mi11:46:5753:358:3726:33
8:33
-0:09
15K
9.32 mi12:13:391:20:178:3726:42
8:36
+0:03
20K
12.43 mi12:41:011:47:398:4027:22
8:49
+0:13
Half
13.11 mi12:47:001:53:388:405:59
8:46
-0:03
25K
15.53 mi13:08:492:15:278:4321:49
9:00
+0:14
30K
18.64 mi13:38:082:44:468:5029:19
9:26
+0:26
20M
20.00 mi13:51:052:57:438:5312:57
9:32
+0:06
21M
21.00 mi14:01:033:07:418:569:58
9:58
+0:26
35K
21.75 mi14:07:473:14:258:566:44
9:00
-0:58
23M
23.00 mi14:19:393:26:178:5811:52
9:29
+0:29
24M
24.00 mi14:28:583:35:368:599:19
9:19
-0:10
40K
24.85 mi14:36:503:43:288:597:52
9:12
-0:07
25.2M
25.20 mi14:40:093:46:479:003:19
9:37
+0:25
Finish
26.22 mi14:49:273:56:059:019:18
9:08
-0:29

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

8:33 /mi

Average Pace

9:01 /mi

Slowest Pace

9:58 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:48:40

71% of race

Time at Steady Pace

1:07:25

29% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 9:00 /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 mi11:20:2427:028:4227:02
8:42
#18905
10K
6.21 mi11:46:5753:358:3726:33
8:33
#18652
15K
9.32 mi12:13:391:20:178:3726:42
8:36
#18559
20K
12.43 mi12:41:011:47:398:4027:22
8:49
#18598
Half
13.11 mi12:47:001:53:388:405:59
8:46
#18631
25K
15.53 mi13:08:492:15:278:4321:49
9:00
#18685
30K
18.64 mi13:38:082:44:468:5029:19
9:26
#18789
20M
20.00 mi13:51:052:57:438:5312:57
9:32
#18809
21M
21.00 mi14:01:033:07:418:569:58
9:58
#18733
35K
21.75 mi14:07:473:14:258:566:44
9:00
#18691
23M
23.00 mi14:19:393:26:178:5811:52
9:29
#18666
24M
24.00 mi14:28:583:35:368:599:19
9:19
#18675
40K
24.85 mi14:36:503:43:288:597:52
9:12
#18608
25.2M
25.20 mi14:40:093:46:479:003:19
9:37
#18561
Finish
26.22 mi14:49:273:56:059:019:18
9:08
#18576
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi189057142714218415(Top 69%)6747(Top 59%)6747(Top 559%)
10K6.21 mi3.10 mi18652+2536913+2296913+22918542(Top 70%)6795(Top 59%)6795(Top 563%)
15K9.32 mi3.11 mi18559+936853+606853+6018415(Top 69%)6747(Top 59%)6747(Top 559%)
20K12.43 mi3.11 mi18598-396866-136866-1318748(Top 70%)6939(Top 61%)6939(Top 575%)
Half13.11 mi0.68 mi18631-336891-256891-2519361(Top 73%)7294(Top 64%)7294(Top 604%)
25K15.53 mi2.42 mi18685-546943-526943-5218945(Top 71%)7097(Top 62%)7097(Top 588%)
30K18.64 mi3.11 mi18789-1047024-817024-8119203(Top 72%)7304(Top 64%)7304(Top 605%)
20M20.00 mi1.36 mi18809-207043-197043-1918983(Top 71%)7289(Top 64%)7289(Top 604%)
21M21.00 mi1.00 mi18733+767007+367007+3617928(Top 67%)6717(Top 59%)6717(Top 557%)
35K21.75 mi0.75 mi18691+426992+156992+1517937(Top 67%)6805(Top 60%)6805(Top 564%)
23M23.00 mi1.25 mi18666+256995-36995-318269(Top 69%)7003(Top 61%)7003(Top 580%)
24M24.00 mi1.00 mi18675-97009-147009-1418542(Top 70%)7193(Top 63%)7193(Top 596%)
40K24.85 mi0.85 mi18608+676984+256984+2517120(Top 64%)6474(Top 57%)6474(Top 536%)
25.2M25.20 mi0.35 mi18561+476961+236961+2315835(Top 59%)5791(Top 51%)5791(Top 480%)
Finish26.22 mi1.02 mi18576-156981-206981-2018588(Top 70%)7218(Top 63%)7218(Top 598%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 69%
×21stories
+97ft-345ft

Overall

18415

Females

6747

F50-54

6747

5K→10K

3.1 - 6.2 mi

Top 70%
×5stories
+79ft-138ft

Overall

18542

Females

6795

F50-54

6795

10K→15K

6.2 - 9.3 mi

Top 69%
×3stories
+67ft-78ft

Overall

18415

Females

6747

F50-54

6747

15K→20K

9.3 - 12.4 mi

Top 70%
×5stories
+106ft-86ft

Overall

18748

Females

6939

F50-54

6939

20K→Half

12.4 - 13.1 mi

Top 73%
×2stories
+19ft-37ft

Overall

19361

Females

7294

F50-54

7294

Half→25K

13.1 - 15.5 mi

Top 71%
×4stories
+66ft-88ft

Overall

18945

Females

7097

F50-54

7097

25K→30K

15.5 - 18.6 mi

Top 72%
×9stories
+181ft-148ft

Overall

19203

Females

7304

F50-54

7304

30K→20M

18.6 - 20.0 mi

Top 71%
×5stories
+64ft-50ft

Overall

18983

Females

7289

F50-54

7289

20M→21M

20.0 - 21.0 mi

Top 67%
×8stories
+106ft-24ft

Overall

17928

Females

6717

F50-54

6717

21M→35K

21.0 - 21.8 mi

Top 67%
×7stories
+17ft-86ft

Overall

17937

Females

6805

F50-54

6805

35K→23M

21.8 - 23.0 mi

Top 69%
×5stories
+23ft-63ft

Overall

18269

Females

7003

F50-54

7003

23M→24M

23.0 - 24.0 mi

Top 70%
×6stories
+12ft-82ft

Overall

18542

Females

7193

F50-54

7193

24M→40K

24.0 - 24.9 mi

Top 64%
×1story
+6ft-20ft

Overall

17120

Females

6474

F50-54

6474

40K→25.2M

24.9 - 25.2 mi

Top 59%
×1story
+13ft-16ft

Overall

15835

Females

5791

F50-54

5791

25.2M→Finish

25.2 - 26.2 mi

Top 70%
×2stories
+22ft-21ft

Overall

18588

Females

7218

F50-54

7218

Passing Analysis

Category:
Athletes Passed
1732
Passed By
1403
Net Change
+329
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#18905
5K → 10K509256+253#18905#18652
10K → 15K221128+93#18652#18559
15K → 20K149188-39#18559#18598
20K → Half1447-33#18598#18631
Half → 25K110164-54#18631#18685
25K → 30K132236-104#18685#18789
30K → 20M81101-20#18789#18809
20M → 21M11640+76#18809#18733
21M → 35K6422+42#18733#18691
35K → 23M9368+25#18691#18666
23M → 24M5160-9#18666#18675
24M → 40K8720+67#18675#18608
40K → 25.2M569+47#18608#18561
25.2M → Finish4964-15#18561#18576
TOTALS17321403+329
📊

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