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BOSTON MARATHON 2023

Chih-Yuan Lu

Bib: 21632•F

WA

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Division (F45-49)
#0 / 1817
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
27:04
Rank: #18970
Start → 5K
27:04 | 8:43/mi
10K· 6.21 mi
53:49
Rank: #18892 (+78)
5K → 10K
26:45 | 8:37/mi
15K· 9.32 mi
1:20:41
Rank: #18796 (+96)
10K → 15K
26:52 | 8:39/mi
20K· 12.43 mi
1:47:51
Rank: #18691 (+105)
15K → 20K
27:10 | 8:45/mi
Half· 13.11 mi
1:53:45
Rank: #18684 (+7)
20K → Half
5:54 | 8:39/mi
25K· 15.53 mi
2:15:14
Rank: #18607 (+77)
Half → 25K
21:29 | 8:52/mi
30K· 18.64 mi
2:44:02
Rank: #18583 (+24)
25K → 30K
28:48 | 9:16/mi
20M
2:57:16
Rank: #18692 (-109)
30K → 20M
13:14 | 9:44/mi
21M
3:08:12
Rank: #18871 (-179)
20M → 21M
10:56 | 10:56/mi
35K· 21.75 mi
3:15:38
Rank: #18988 (-117)
21M → 35K
7:26 | 9:56/mi
23M
3:29:03
Rank: #19251 (-263)
35K → 23M
13:25 | 10:43/mi
24M
3:39:57
Rank: #19531 (-280)
23M → 24M
10:54 | 10:54/mi
40K· 24.85 mi
3:49:22
Rank: #19697 (-166)
24M → 40K
9:25 | 11:01/mi
25.2M
3:53:22
Rank: #19740 (-43)
40K → 25.2M
4:00 | 11:36/mi
Finish· 26.22 mi
4:04:23
Rank: #19961 (-221)
25.2M → Finish
11:01 | 10:49/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:53:45
Pace8:41 /mi
2nd Half
Distance13.11 mi
Time2:10:38
Pace9:58 /mi
📊Positive Split: 14.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:44:5327:048:4327:04
8:43
-
10K
6.21 mi12:11:3853:498:4026:45
8:37
-0:06
15K
9.32 mi12:38:301:20:418:3926:52
8:39
+0:02
20K
12.43 mi13:05:401:47:518:4127:10
8:45
+0:06
Half
13.11 mi13:11:341:53:458:415:54
8:39
-0:06
25K
15.53 mi13:33:032:15:148:4221:29
8:52
+0:13
30K
18.64 mi14:01:512:44:028:4828:48
9:16
+0:24
20M
20.00 mi14:15:052:57:168:5213:14
9:44
+0:28
21M
21.00 mi14:26:013:08:128:5810:56
10:56
+1:12
35K
21.75 mi14:33:273:15:389:007:26
9:56
-1:00
23M
23.00 mi14:46:523:29:039:0513:25
10:43
+0:47
24M
24.00 mi14:57:463:39:579:1010:54
10:54
+0:11
40K
24.85 mi15:07:113:49:229:149:25
11:01
+0:07
25.2M
25.20 mi15:11:113:53:229:164:00
11:36
+0:35
Finish
26.22 mi15:22:124:04:239:2011:01
10:49
-0:47

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

8:37 /mi

Average Pace

9:20 /mi

Slowest Pace

11:36 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:15:14

55% of race

Time at Steady Pace

49:28

20% of race

Time at Slower Pace

59:41

24% of race

Average Pace: 9:19 /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 mi11:44:5327:048:4327:04
8:43
#18970
10K
6.21 mi12:11:3853:498:4026:45
8:37
#18892
15K
9.32 mi12:38:301:20:418:3926:52
8:39
#18796
20K
12.43 mi13:05:401:47:518:4127:10
8:45
#18691
Half
13.11 mi13:11:341:53:458:415:54
8:39
#18684
25K
15.53 mi13:33:032:15:148:4221:29
8:52
#18607
30K
18.64 mi14:01:512:44:028:4828:48
9:16
#18583
20M
20.00 mi14:15:052:57:168:5213:14
9:44
#18692
21M
21.00 mi14:26:013:08:128:5810:56
10:56
#18871
35K
21.75 mi14:33:273:15:389:007:26
9:56
#18988
23M
23.00 mi14:46:523:29:039:0513:25
10:43
#19251
24M
24.00 mi14:57:463:39:579:1010:54
10:54
#19531
40K
24.85 mi15:07:113:49:229:149:25
11:01
#19697
25.2M
25.20 mi15:11:113:53:229:164:00
11:36
#19740
Finish
26.22 mi15:22:124:04:239:2011:01
10:49
#19961
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi189707188718818730(Top 70%)6947(Top 61%)6947(Top 382%)
10K6.21 mi3.10 mi18892+787074+1147074+11418906(Top 71%)7033(Top 62%)7033(Top 387%)
15K9.32 mi3.11 mi18796+967003+717003+7118730(Top 70%)6947(Top 61%)6947(Top 382%)
20K12.43 mi3.11 mi18691+1056928+756928+7518398(Top 69%)6738(Top 59%)6738(Top 371%)
Half13.11 mi0.68 mi18684+76926+26926+218692(Top 70%)6906(Top 60%)6906(Top 380%)
25K15.53 mi2.42 mi18607+776898+286898+2818292(Top 69%)6724(Top 59%)6724(Top 370%)
30K18.64 mi3.11 mi18583+246910-126910-1218495(Top 69%)6919(Top 61%)6919(Top 381%)
20M20.00 mi1.36 mi18692-1096978-686978-6819681(Top 74%)7687(Top 67%)7687(Top 423%)
21M21.00 mi1.00 mi18871-1797093-1157093-11520683(Top 78%)8279(Top 72%)8279(Top 456%)
35K21.75 mi0.75 mi18988-1177171-787171-7821116(Top 79%)8545(Top 75%)8545(Top 470%)
23M23.00 mi1.25 mi19251-2637323-1527323-15221794(Top 82%)8960(Top 78%)8960(Top 493%)
24M24.00 mi1.00 mi19531-2807501-1787501-17822853(Top 86%)9550(Top 84%)9550(Top 526%)
40K24.85 mi0.85 mi19697-1667604-1037604-10322395(Top 84%)9339(Top 82%)9339(Top 514%)
25.2M25.20 mi0.35 mi19740-437637-337637-3321767(Top 82%)8992(Top 79%)8992(Top 495%)
Finish26.22 mi1.02 mi19961-2217771-1347771-13423631(Top 89%)9969(Top 87%)9969(Top 549%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 70%
×21stories
+97ft-345ft

Overall

18730

Females

6947

F45-49

6947

5K→10K

3.1 - 6.2 mi

Top 71%
×5stories
+79ft-138ft

Overall

18906

Females

7033

F45-49

7033

10K→15K

6.2 - 9.3 mi

Top 70%
×3stories
+67ft-78ft

Overall

18730

Females

6947

F45-49

6947

15K→20K

9.3 - 12.4 mi

Top 69%
×5stories
+106ft-86ft

Overall

18398

Females

6738

F45-49

6738

20K→Half

12.4 - 13.1 mi

Top 70%
×2stories
+19ft-37ft

Overall

18692

Females

6906

F45-49

6906

Half→25K

13.1 - 15.5 mi

Top 69%
×4stories
+66ft-88ft

Overall

18292

Females

6724

F45-49

6724

25K→30K

15.5 - 18.6 mi

Top 69%
×9stories
+181ft-148ft

Overall

18495

Females

6919

F45-49

6919

30K→20M

18.6 - 20.0 mi

Top 74%
×5stories
+64ft-50ft

Overall

19681

Females

7687

F45-49

7687

20M→21M

20.0 - 21.0 mi

Top 78%
×8stories
+106ft-24ft

Overall

20683

Females

8279

F45-49

8279

21M→35K

21.0 - 21.8 mi

Top 79%
×7stories
+17ft-86ft

Overall

21116

Females

8545

F45-49

8545

35K→23M

21.8 - 23.0 mi

Top 82%
×5stories
+23ft-63ft

Overall

21794

Females

8960

F45-49

8960

23M→24M

23.0 - 24.0 mi

Top 86%
×6stories
+12ft-82ft

Overall

22853

Females

9550

F45-49

9550

24M→40K

24.0 - 24.9 mi

Top 84%
×1story
+6ft-20ft

Overall

22395

Females

9339

F45-49

9339

40K→25.2M

24.9 - 25.2 mi

Top 82%
×1story
+13ft-16ft

Overall

21767

Females

8992

F45-49

8992

25.2M→Finish

25.2 - 26.2 mi

Top 89%
×2stories
+22ft-21ft

Overall

23631

Females

9969

F45-49

9969

Passing Analysis

Category:
Athletes Passed
1389
Passed By
2380
Net Change
-991
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#18970
5K → 10K388310+78#18970#18892
10K → 15K237141+96#18892#18796
15K → 20K207102+105#18796#18691
20K → Half2821+7#18691#18684
Half → 25K16285+77#18684#18607
25K → 30K180156+24#18607#18583
30K → 20M52161-109#18583#18692
20M → 21M41220-179#18692#18871
21M → 35K18135-117#18871#18988
35K → 23M28291-263#18988#19251
23M → 24M16296-280#19251#19531
24M → 40K14180-166#19531#19697
40K → 25.2M1154-43#19697#19740
25.2M → Finish7228-221#19740#19961
TOTALS13892380-991
📊

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