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BOSTON MARATHON 2023

Kwok Lai

Bib: 3634•M

TX

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0:00
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Overall
#0 / 26622
Top 9%
Gender (Male)
#0 / 15176
Top 15%
Division (M18-39)
#0 / 5285
Top 33%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:19
Rank: #2473
Start → 5K
20:19 | 6:32/mi
10K· 6.21 mi
40:19
Rank: #2428 (+45)
5K → 10K
20:00 | 6:26/mi
15K· 9.32 mi
1:00:35
Rank: #2525 (-97)
10K → 15K
20:16 | 6:31/mi
20K· 12.43 mi
1:21:04
Rank: #2584 (-59)
15K → 20K
20:29 | 6:36/mi
Half· 13.11 mi
1:25:26
Rank: #2558 (+26)
20K → Half
4:22 | 6:24/mi
25K· 15.53 mi
1:41:32
Rank: #2604 (-46)
Half → 25K
16:06 | 6:38/mi
30K· 18.64 mi
2:02:29
Rank: #2577 (+27)
25K → 30K
20:57 | 6:45/mi
20M
2:11:39
Rank: #2551 (+26)
30K → 20M
9:10 | 6:45/mi
21M
2:18:43
Rank: #2511 (+40)
20M → 21M
7:04 | 7:04/mi
35K· 21.75 mi
2:23:34
Rank: #2481 (+30)
21M → 35K
4:51 | 6:29/mi
23M
2:32:03
Rank: #2442 (+39)
35K → 23M
8:29 | 6:47/mi
24M
2:38:41
Rank: #2425 (+17)
23M → 24M
6:38 | 6:38/mi
40K· 24.85 mi
2:44:24
Rank: #2402 (+23)
24M → 40K
5:43 | 6:41/mi
25.2M
2:46:49
Rank: #2371 (+31)
40K → 25.2M
2:25 | 7:00/mi
Finish· 26.22 mi
2:53:10
Rank: #2306 (+65)
25.2M → Finish
6:21 | 6:14/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:25:26
Pace6:31 /mi
2nd Half
Distance13.11 mi
Time1:27:44
Pace6:42 /mi
📊Positive Split: 2.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:21:5520:196:3220:19
6:32
-
10K
6.21 mi10:41:5540:196:2920:00
6:26
-0:06
15K
9.32 mi11:02:111:00:356:3020:16
6:31
+0:05
20K
12.43 mi11:22:401:21:046:3120:29
6:36
+0:05
Half
13.11 mi11:27:021:25:266:314:22
6:24
-0:12
25K
15.53 mi11:43:081:41:326:3216:06
6:38
+0:14
30K
18.64 mi12:04:052:02:296:3420:57
6:45
+0:07
20M
20.00 mi12:13:152:11:396:359:10
6:45
0:00
21M
21.00 mi12:20:192:18:436:367:04
7:04
+0:19
35K
21.75 mi12:25:102:23:346:364:51
6:29
-0:35
23M
23.00 mi12:33:392:32:036:378:29
6:47
+0:18
24M
24.00 mi12:40:172:38:416:376:38
6:38
-0:09
40K
24.85 mi12:46:002:44:246:375:43
6:41
+0:03
25.2M
25.20 mi12:48:252:46:496:372:25
7:00
+0:19
Finish
26.22 mi12:54:462:53:106:376:21
6:14
-0:46

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

6:14 /mi

Average Pace

6:37 /mi

Slowest Pace

7:04 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:43:41

95% of race

Time at Steady Pace

9:29

5% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:36 /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 mi10:21:5520:196:3220:19
6:32
#2473
10K
6.21 mi10:41:5540:196:2920:00
6:26
#2428
15K
9.32 mi11:02:111:00:356:3020:16
6:31
#2525
20K
12.43 mi11:22:401:21:046:3120:29
6:36
#2584
Half
13.11 mi11:27:021:25:266:314:22
6:24
#2558
25K
15.53 mi11:43:081:41:326:3216:06
6:38
#2604
30K
18.64 mi12:04:052:02:296:3420:57
6:45
#2577
20M
20.00 mi12:13:152:11:396:359:10
6:45
#2551
21M
21.00 mi12:20:192:18:436:367:04
7:04
#2511
35K
21.75 mi12:25:102:23:346:364:51
6:29
#2481
23M
23.00 mi12:33:392:32:036:378:29
6:47
#2442
24M
24.00 mi12:40:172:38:416:376:38
6:38
#2425
40K
24.85 mi12:46:002:44:246:375:43
6:41
#2402
25.2M
25.20 mi12:48:252:46:496:372:25
7:00
#2371
Finish
26.22 mi12:54:462:53:106:376:21
6:14
#2306
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi2473235923592758(Top 10%)2634(Top 17%)2634(Top 50%)
10K6.21 mi3.10 mi2428+452319+402319+402419(Top 9%)2314(Top 15%)2314(Top 44%)
15K9.32 mi3.11 mi2525-972412-932412-932758(Top 10%)2634(Top 17%)2634(Top 50%)
20K12.43 mi3.11 mi2584-592471-592471-592782(Top 10%)2660(Top 18%)2660(Top 50%)
Half13.11 mi0.68 mi2558+262450+212450+212170(Top 8%)2080(Top 14%)2080(Top 39%)
25K15.53 mi2.42 mi2604-462490-402490-402932(Top 11%)2799(Top 18%)2799(Top 53%)
30K18.64 mi3.11 mi2577+272462+282462+282629(Top 10%)2497(Top 16%)2497(Top 47%)
20M20.00 mi1.36 mi2551+262439+232439+232471(Top 9%)2342(Top 15%)2342(Top 44%)
21M21.00 mi1.00 mi2511+402404+352404+352426(Top 9%)2289(Top 15%)2289(Top 43%)
35K21.75 mi0.75 mi2481+302376+282376+282287(Top 9%)2167(Top 14%)2167(Top 41%)
23M23.00 mi1.25 mi2442+392336+402336+402481(Top 9%)2327(Top 15%)2327(Top 44%)
24M24.00 mi1.00 mi2425+172320+162320+162695(Top 10%)2504(Top 16%)2504(Top 47%)
40K24.85 mi0.85 mi2402+232297+232297+232238(Top 8%)2076(Top 14%)2076(Top 39%)
25.2M25.20 mi0.35 mi2371+312268+292268+291702(Top 6%)1595(Top 11%)1595(Top 30%)
Finish26.22 mi1.02 mi2306+652208+602208+601357(Top 5%)1282(Top 8%)1282(Top 24%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 10%
×21stories
+97ft-345ft

Overall

2758

Males

2634

M18-39

2634

5K→10K

3.1 - 6.2 mi

Top 9%
×5stories
+79ft-138ft

Overall

2419

Males

2314

M18-39

2314

10K→15K

6.2 - 9.3 mi

Top 10%
×3stories
+67ft-78ft

Overall

2758

Males

2634

M18-39

2634

15K→20K

9.3 - 12.4 mi

Top 10%
×5stories
+106ft-86ft

Overall

2782

Males

2660

M18-39

2660

20K→Half

12.4 - 13.1 mi

Top 8%
×2stories
+19ft-37ft

Overall

2170

Males

2080

M18-39

2080

Half→25K

13.1 - 15.5 mi

Top 11%
×4stories
+66ft-88ft

Overall

2932

Males

2799

M18-39

2799

25K→30K

15.5 - 18.6 mi

Top 10%
×9stories
+181ft-148ft

Overall

2629

Males

2497

M18-39

2497

30K→20M

18.6 - 20.0 mi

Top 9%
×5stories
+64ft-50ft

Overall

2471

Males

2342

M18-39

2342

20M→21M

20.0 - 21.0 mi

Top 9%
×8stories
+106ft-24ft

Overall

2426

Males

2289

M18-39

2289

21M→35K

21.0 - 21.8 mi

Top 9%
×7stories
+17ft-86ft

Overall

2287

Males

2167

M18-39

2167

35K→23M

21.8 - 23.0 mi

Top 9%
×5stories
+23ft-63ft

Overall

2481

Males

2327

M18-39

2327

23M→24M

23.0 - 24.0 mi

Top 10%
×6stories
+12ft-82ft

Overall

2695

Males

2504

M18-39

2504

24M→40K

24.0 - 24.9 mi

Top 8%
×1story
+6ft-20ft

Overall

2238

Males

2076

M18-39

2076

40K→25.2M

24.9 - 25.2 mi

Top 6%
×1story
+13ft-16ft

Overall

1702

Males

1595

M18-39

1595

25.2M→Finish

25.2 - 26.2 mi

Top 5%
×2stories
+22ft-21ft

Overall

1357

Males

1282

M18-39

1282

Passing Analysis

Category:
Athletes Passed
755
Passed By
588
Net Change
+167
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#2473
5K → 10K157112+45#2473#2428
10K → 15K38135-97#2428#2525
15K → 20K4099-59#2525#2584
20K → Half304+26#2584#2558
Half → 25K3783-46#2558#2604
25K → 30K8255+27#2604#2577
30K → 20M5226+26#2577#2551
20M → 21M6222+40#2551#2511
21M → 35K377+30#2511#2481
35K → 23M5112+39#2481#2442
23M → 24M3417+17#2442#2425
24M → 40K3411+23#2425#2402
40K → 25.2M332+31#2402#2371
25.2M → Finish683+65#2371#2306
TOTALS755588+167
📊

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