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BOSTON MARATHON 2024

Wai Chun Lai

Bib: 17588•F

0:00
0:00
/ mi
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Overall
#0 / 25550
Top 49%
Gender (Female)
#0 / 10924
Top 37%
Division (F18-39)
#0 / 4660
Race Day Weather
55°/45°F
scattered clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
25:29
Rank: #16032
Start → 5K
8:12/mi
25:29 split
10K· 6.21 mi
51:11
Rank: #15973 (+59)
5K → 10K
8:16/mi
25:42 split
15K· 9.32 mi
1:16:47
Rank: #15570 (+403)
10K → 15K
8:14/mi
25:36 split
20K· 12.43 mi
1:43:05
Rank: #15265 (+305)
15K → 20K
8:28/mi
26:18 split
Half· 13.11 mi
1:49:01
Rank: #15327 (-62)
20K → Half
8:42/mi
5:56 split
25K· 15.53 mi
2:09:29
Rank: #14850 (+477)
Half → 25K
8:26/mi
20:28 split
30K· 18.64 mi
2:36:13
Rank: #14094 (+756)
25K → 30K
8:36/mi
26:44 split
20M
2:48:11
Rank: #13832 (+262)
30K → 20M
8:48/mi
11:58 split
21M
2:57:19
Rank: #13496 (+336)
20M → 21M
9:08/mi
9:08 split
35K· 21.75 mi
3:03:35
Rank: #13330 (+166)
21M → 35K
8:23/mi
6:16 split
23M
3:14:35
Rank: #13090 (+240)
35K → 23M
8:47/mi
11:00 split
24M
3:23:10
Rank: #12916 (+174)
23M → 24M
8:35/mi
8:35 split
40K· 24.85 mi
3:30:34
Rank: #12719 (+197)
24M → 40K
8:39/mi
7:24 split
25.2M
3:33:50
Rank: #12624 (+95)
40K → 25.2M
9:28/mi
3:16 split
Finish· 26.22 mi
3:42:33
Rank: #12557 (+67)
25.2M → Finish
8:33/mi
8:43 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:49:01
Pace8:19 /mi
2nd Half
Distance13.11 mi
Time1:53:32
Pace8:40 /mi
📊Positive Split: 4.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:16:3325:298:1225:29
8:12
-
10K
6.21 mi11:42:1551:118:1425:42
8:16
+0:04
15K
9.32 mi12:07:511:16:478:1425:36
8:14
-0:02
20K
12.43 mi12:34:091:43:058:1826:18
8:28
+0:14
Half
13.11 mi12:40:051:49:018:195:56
8:42
+0:14
25K
15.53 mi13:00:332:09:298:2020:28
8:26
-0:16
30K
18.64 mi13:27:172:36:138:2326:44
8:36
+0:10
20M
20.00 mi13:39:152:48:118:2511:58
8:48
+0:12
21M
21.00 mi13:48:232:57:198:279:08
9:08
+0:20
35K
21.75 mi13:54:393:03:358:266:16
8:23
-0:45
23M
23.00 mi14:05:393:14:358:2811:00
8:47
+0:24
24M
24.00 mi14:14:143:23:108:288:35
8:35
-0:12
40K
24.85 mi14:21:383:30:348:287:24
8:39
+0:04
25.2M
25.20 mi14:24:543:33:508:293:16
9:28
+0:49
Finish
26.22 mi14:33:373:42:338:308:43
8:33
-0:55

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

8:12 /mi

Average Pace

8:30 /mi

Slowest Pace

9:28 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:30:09

94% of race

Time at Steady Pace

12:24

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:29 /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 mi11:16:3325:298:1225:29
8:12
#16032
10K
6.21 mi11:42:1551:118:1425:42
8:16
#15973
15K
9.32 mi12:07:511:16:478:1425:36
8:14
#15570
20K
12.43 mi12:34:091:43:058:1826:18
8:28
#15265
Half
13.11 mi12:40:051:49:018:195:56
8:42
#15327
25K
15.53 mi13:00:332:09:298:2020:28
8:26
#14850
30K
18.64 mi13:27:172:36:138:2326:44
8:36
#14094
20M
20.00 mi13:39:152:48:118:2511:58
8:48
#13832
21M
21.00 mi13:48:232:57:198:279:08
9:08
#13496
35K
21.75 mi13:54:393:03:358:266:16
8:23
#13330
23M
23.00 mi14:05:393:14:358:2811:00
8:47
#13090
24M
24.00 mi14:14:143:23:108:288:35
8:35
#12916
40K
24.85 mi14:21:383:30:348:287:24
8:39
#12719
25.2M
25.20 mi14:24:543:33:508:293:16
9:28
#12624
Finish
26.22 mi14:33:373:42:338:308:43
8:33
#12557
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi160325574557414945(Top 58%)4928(Top 45%)4928(Top 106%)
10K6.21 mi3.10 mi15973+595515+595515+5915965(Top 62%)5507(Top 50%)5507(Top 118%)
15K9.32 mi3.11 mi15570+4035289+2265289+22614945(Top 58%)4928(Top 45%)4928(Top 106%)
20K12.43 mi3.11 mi15265+3055115+1745115+17414630(Top 57%)4790(Top 44%)4790(Top 103%)
Half13.11 mi0.68 mi15327-625160-455160-4516819(Top 66%)6102(Top 56%)6102(Top 131%)
25K15.53 mi2.42 mi14850+4774907+2534907+25312764(Top 50%)3918(Top 36%)3918(Top 84%)
30K18.64 mi3.11 mi14094+7564536+3714536+37111199(Top 44%)3287(Top 30%)3287(Top 71%)
20M20.00 mi1.36 mi13832+2624443+934443+9311137(Top 44%)3554(Top 33%)3554(Top 76%)
21M21.00 mi1.00 mi13496+3364315+1284315+1289225(Top 36%)2814(Top 26%)2814(Top 60%)
35K21.75 mi0.75 mi13330+1664254+614254+6110056(Top 39%)3266(Top 30%)3266(Top 70%)
23M23.00 mi1.25 mi13090+2404190+644190+6410034(Top 39%)3416(Top 31%)3416(Top 73%)
24M24.00 mi1.00 mi12916+1744125+654125+659975(Top 39%)3429(Top 31%)3429(Top 74%)
40K24.85 mi0.85 mi12719+1974071+544071+549200(Top 36%)3194(Top 29%)3194(Top 69%)
25.2M25.20 mi0.35 mi12624+954032+394032+398700(Top 34%)3024(Top 28%)3024(Top 65%)
Finish26.22 mi1.02 mi12557+674043-114043-1111833(Top 46%)4383(Top 40%)4383(Top 94%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 58%
×21stories
+97ft-345ft

Overall

14945

Females

4928

F18-39

4928

5K→10K

3.1 - 6.2 mi

Top 62%
×5stories
+79ft-138ft

Overall

15965

Females

5507

F18-39

5507

10K→15K

6.2 - 9.3 mi

Top 58%
×3stories
+67ft-78ft

Overall

14945

Females

4928

F18-39

4928

15K→20K

9.3 - 12.4 mi

Top 57%
×5stories
+106ft-86ft

Overall

14630

Females

4790

F18-39

4790

20K→Half

12.4 - 13.1 mi

Top 66%
×2stories
+19ft-37ft

Overall

16819

Females

6102

F18-39

6102

Half→25K

13.1 - 15.5 mi

Top 50%
×4stories
+66ft-88ft

Overall

12764

Females

3918

F18-39

3918

25K→30K

15.5 - 18.6 mi

Top 44%
×9stories
+181ft-148ft

Overall

11199

Females

3287

F18-39

3287

30K→20M

18.6 - 20.0 mi

Top 44%
×5stories
+64ft-50ft

Overall

11137

Females

3554

F18-39

3554

20M→21M

20.0 - 21.0 mi

Top 36%
×8stories
+106ft-24ft

Overall

9225

Females

2814

F18-39

2814

21M→35K

21.0 - 21.8 mi

Top 39%
×7stories
+17ft-86ft

Overall

10056

Females

3266

F18-39

3266

35K→23M

21.8 - 23.0 mi

Top 39%
×5stories
+23ft-63ft

Overall

10034

Females

3416

F18-39

3416

23M→24M

23.0 - 24.0 mi

Top 39%
×6stories
+12ft-82ft

Overall

9975

Females

3429

F18-39

3429

24M→40K

24.0 - 24.9 mi

Top 36%
×1story
+6ft-20ft

Overall

9200

Females

3194

F18-39

3194

40K→25.2M

24.9 - 25.2 mi

Top 34%
×1story
+13ft-16ft

Overall

8700

Females

3024

F18-39

3024

25.2M→Finish

25.2 - 26.2 mi

Top 46%
×2stories
+22ft-21ft

Overall

11833

Females

4383

F18-39

4383

Passing Analysis

Category:
Athletes Passed
4150
Passed By
675
Net Change
+3475
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#16032
5K → 10K309250+59#16032#15973
10K → 15K45855+403#15973#15570
15K → 20K38883+305#15570#15265
20K → Half2587-62#15265#15327
Half → 25K50124+477#15327#14850
25K → 30K7659+756#14850#14094
30K → 20M28523+262#14094#13832
20M → 21M34711+336#13832#13496
21M → 35K1759+166#13496#13330
35K → 23M26828+240#13330#13090
23M → 24M19117+174#13090#12916
24M → 40K21417+197#12916#12719
40K → 25.2M994+95#12719#12624
25.2M → Finish12558+67#12624#12557
TOTALS4150675+3475
📊

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