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BOSTON MARATHON 2023

Katie Lau

Bib: 16569•F

NY

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 44%
Gender (Female)
#0 / 11423
Top 26%
Division (F18-39)
#0 / 4884
Top 43%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
25:57
Rank: #16515
Start → 5K
25:57 | 8:21/mi
10K· 6.21 mi
51:11
Rank: #16092 (+423)
5K → 10K
25:14 | 8:07/mi
15K· 9.32 mi
1:15:43
Rank: #15288 (+804)
10K → 15K
24:32 | 7:54/mi
20K· 12.43 mi
1:40:04
Rank: #14508 (+780)
15K → 20K
24:21 | 7:50/mi
Half· 13.11 mi
1:45:25
Rank: #14436 (+72)
20K → Half
5:21 | 7:50/mi
25K· 15.53 mi
2:04:16
Rank: #13868 (+568)
Half → 25K
18:51 | 7:46/mi
30K· 18.64 mi
2:28:54
Rank: #13202 (+666)
25K → 30K
24:38 | 7:56/mi
20M
2:39:43
Rank: #12925 (+277)
30K → 20M
10:49 | 7:58/mi
21M
2:47:58
Rank: #12647 (+278)
20M → 21M
8:15 | 8:15/mi
35K· 21.75 mi
2:53:48
Rank: #12561 (+86)
21M → 35K
5:50 | 7:48/mi
23M
3:03:44
Rank: #12355 (+206)
35K → 23M
9:56 | 7:56/mi
24M
3:11:22
Rank: #12198 (+157)
23M → 24M
7:38 | 7:38/mi
40K· 24.85 mi
3:18:00
Rank: #12022 (+176)
24M → 40K
6:38 | 7:45/mi
25.2M
3:20:49
Rank: #11936 (+86)
40K → 25.2M
2:49 | 8:10/mi
Finish· 26.22 mi
3:28:14
Rank: #11695 (+241)
25.2M → Finish
7:25 | 7:17/mi

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time1:45:25
Pace8:02 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:42:49
Pace7:51 /mi
📊Negative Split: 2.5% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:21:0725:578:2125:57
8:21
-
10K
6.21 mi11:46:2151:118:1425:14
8:07
-0:14
15K
9.32 mi12:10:531:15:438:0724:32
7:54
-0:13
20K
12.43 mi12:35:141:40:048:0324:21
7:50
-0:04
Half
13.11 mi12:40:351:45:258:025:21
7:50
0:00
25K
15.53 mi12:59:262:04:168:0018:51
7:46
-0:04
30K
18.64 mi13:24:042:28:547:5924:38
7:56
+0:10
20M
20.00 mi13:34:532:39:437:5910:49
7:58
+0:02
21M
21.00 mi13:43:082:47:588:008:15
8:15
+0:17
35K
21.75 mi13:48:582:53:487:595:50
7:48
-0:27
23M
23.00 mi13:58:543:03:447:599:56
7:56
+0:08
24M
24.00 mi14:06:323:11:227:587:38
7:38
-0:18
40K
24.85 mi14:13:103:18:007:586:38
7:45
+0:07
25.2M
25.20 mi14:15:593:20:497:582:49
8:10
+0:25
Finish
26.22 mi14:23:243:28:147:577:25
7:17
-0:53

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

7:17 /mi

Average Pace

7:57 /mi

Slowest Pace

8:21 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:25:59

70% of race

Time at Steady Pace

1:02:15

30% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:57 /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 mi11:21:0725:578:2125:57
8:21
#16515
10K
6.21 mi11:46:2151:118:1425:14
8:07
#16092
15K
9.32 mi12:10:531:15:438:0724:32
7:54
#15288
20K
12.43 mi12:35:141:40:048:0324:21
7:50
#14508
Half
13.11 mi12:40:351:45:258:025:21
7:50
#14436
25K
15.53 mi12:59:262:04:168:0018:51
7:46
#13868
30K
18.64 mi13:24:042:28:547:5924:38
7:56
#13202
20M
20.00 mi13:34:532:39:437:5910:49
7:58
#12925
21M
21.00 mi13:43:082:47:588:008:15
8:15
#12647
35K
21.75 mi13:48:582:53:487:595:50
7:48
#12561
23M
23.00 mi13:58:543:03:447:599:56
7:56
#12355
24M
24.00 mi14:06:323:11:227:587:38
7:38
#12198
40K
24.85 mi14:13:103:18:007:586:38
7:45
#12022
25.2M
25.20 mi14:15:593:20:497:582:49
8:10
#11936
Finish
26.22 mi14:23:243:28:147:577:25
7:17
#11695
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi165155608560813502(Top 51%)3775(Top 33%)3775(Top 77%)
10K6.21 mi3.10 mi16092+4235333+2755333+27515679(Top 59%)5062(Top 44%)5062(Top 104%)
15K9.32 mi3.11 mi15288+8044843+4904843+49013502(Top 51%)3775(Top 33%)3775(Top 77%)
20K12.43 mi3.11 mi14508+7804372+4714372+47112061(Top 45%)3004(Top 26%)3004(Top 62%)
Half13.11 mi0.68 mi14436+724335+374335+3713127(Top 49%)3561(Top 31%)3561(Top 73%)
25K15.53 mi2.42 mi13868+5684033+3024033+30210915(Top 41%)2444(Top 21%)2444(Top 50%)
30K18.64 mi3.11 mi13202+6663668+3653668+36510369(Top 39%)2343(Top 21%)2343(Top 48%)
20M20.00 mi1.36 mi12925+2773527+1413527+14110013(Top 38%)2244(Top 20%)2244(Top 46%)
21M21.00 mi1.00 mi12647+2783380+1473380+1478949(Top 34%)1911(Top 17%)1911(Top 39%)
35K21.75 mi0.75 mi12561+863343+373343+3710687(Top 40%)2721(Top 24%)2721(Top 56%)
23M23.00 mi1.25 mi12355+2063255+883255+889339(Top 35%)2199(Top 19%)2199(Top 45%)
24M24.00 mi1.00 mi12198+1573187+683187+688680(Top 33%)1967(Top 17%)1967(Top 40%)
40K24.85 mi0.85 mi12022+1763112+753112+758434(Top 32%)1924(Top 17%)1924(Top 39%)
25.2M25.20 mi0.35 mi11936+863068+443068+447619(Top 29%)1689(Top 15%)1689(Top 35%)
Finish26.22 mi1.02 mi11695+2412956+1122956+1127023(Top 26%)1450(Top 13%)1450(Top 30%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 51%
×21stories
+97ft-345ft

Overall

13502

Females

3775

F18-39

3775

5K→10K

3.1 - 6.2 mi

Top 59%
×5stories
+79ft-138ft

Overall

15679

Females

5062

F18-39

5062

10K→15K

6.2 - 9.3 mi

Top 51%
×3stories
+67ft-78ft

Overall

13502

Females

3775

F18-39

3775

15K→20K

9.3 - 12.4 mi

Top 45%
×5stories
+106ft-86ft

Overall

12061

Females

3004

F18-39

3004

20K→Half

12.4 - 13.1 mi

Top 49%
×2stories
+19ft-37ft

Overall

13127

Females

3561

F18-39

3561

Half→25K

13.1 - 15.5 mi

Top 41%
×4stories
+66ft-88ft

Overall

10915

Females

2444

F18-39

2444

25K→30K

15.5 - 18.6 mi

Top 39%
×9stories
+181ft-148ft

Overall

10369

Females

2343

F18-39

2343

30K→20M

18.6 - 20.0 mi

Top 38%
×5stories
+64ft-50ft

Overall

10013

Females

2244

F18-39

2244

20M→21M

20.0 - 21.0 mi

Top 34%
×8stories
+106ft-24ft

Overall

8949

Females

1911

F18-39

1911

21M→35K

21.0 - 21.8 mi

Top 40%
×7stories
+17ft-86ft

Overall

10687

Females

2721

F18-39

2721

35K→23M

21.8 - 23.0 mi

Top 35%
×5stories
+23ft-63ft

Overall

9339

Females

2199

F18-39

2199

23M→24M

23.0 - 24.0 mi

Top 33%
×6stories
+12ft-82ft

Overall

8680

Females

1967

F18-39

1967

24M→40K

24.0 - 24.9 mi

Top 32%
×1story
+6ft-20ft

Overall

8434

Females

1924

F18-39

1924

40K→25.2M

24.9 - 25.2 mi

Top 29%
×1story
+13ft-16ft

Overall

7619

Females

1689

F18-39

1689

25.2M→Finish

25.2 - 26.2 mi

Top 26%
×2stories
+22ft-21ft

Overall

7023

Females

1450

F18-39

1450

Passing Analysis

Category:
Athletes Passed
5054
Passed By
234
Net Change
+4820
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#16515
5K → 10K563140+423#16515#16092
10K → 15K82218+804#16092#15288
15K → 20K7844+780#15288#14508
20K → Half786+72#14508#14436
Half → 25K5702+568#14436#13868
25K → 30K6748+666#13868#13202
30K → 20M2825+277#13202#12925
20M → 21M28810+278#12925#12647
21M → 35K9711+86#12647#12561
35K → 23M22014+206#12561#12355
23M → 24M1614+157#12355#12198
24M → 40K1815+176#12198#12022
40K → 25.2M860+86#12022#11936
25.2M → Finish2487+241#11936#11695
TOTALS5054234+4820
📊

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