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BOSTON MARATHON 2023

David Lau

Bib: 6228•M

ON

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0:00
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Overall
#0 / 26622
Top 9%
Gender (Male)
#0 / 15176
Top 16%
Division (M18-39)
#0 / 5285
Top 35%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:20
Rank: #2520
Start → 5K
20:20 | 6:33/mi
10K· 6.21 mi
40:23
Rank: #2486 (+34)
5K → 10K
20:03 | 6:27/mi
15K· 9.32 mi
1:00:32
Rank: #2502 (-16)
10K → 15K
20:09 | 6:29/mi
20K· 12.43 mi
1:20:52
Rank: #2488 (+14)
15K → 20K
20:20 | 6:33/mi
Half· 13.11 mi
1:25:19
Rank: #2505 (-17)
20K → Half
4:27 | 6:31/mi
25K· 15.53 mi
1:41:17
Rank: #2517 (-12)
Half → 25K
15:58 | 6:35/mi
30K· 18.64 mi
2:02:22
Rank: #2538 (-21)
25K → 30K
21:05 | 6:47/mi
20M
2:11:43
Rank: #2570 (-32)
30K → 20M
9:21 | 6:53/mi
21M
2:19:06
Rank: #2592 (-22)
20M → 21M
7:23 | 7:23/mi
35K· 21.75 mi
2:24:08
Rank: #2601 (-9)
21M → 35K
5:02 | 6:44/mi
23M
2:32:39
Rank: #2568 (+33)
35K → 23M
8:31 | 6:48/mi
24M
2:39:17
Rank: #2547 (+21)
23M → 24M
6:38 | 6:38/mi
40K· 24.85 mi
2:45:05
Rank: #2548 (-1)
24M → 40K
5:48 | 6:47/mi
25.2M
2:47:37
Rank: #2551 (-3)
40K → 25.2M
2:32 | 7:21/mi
Finish· 26.22 mi
2:54:12
Rank: #2513 (+38)
25.2M → Finish
6:35 | 6:28/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:25:19
Pace6:30 /mi
2nd Half
Distance13.11 mi
Time1:28:53
Pace6:47 /mi
📊Positive Split: 4.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:23:2420:206:3320:20
6:33
-
10K
6.21 mi10:43:2740:236:3020:03
6:27
-0:06
15K
9.32 mi11:03:361:00:326:3020:09
6:29
+0:02
20K
12.43 mi11:23:561:20:526:3020:20
6:33
+0:04
Half
13.11 mi11:28:231:25:196:304:27
6:31
-0:02
25K
15.53 mi11:44:211:41:176:3115:58
6:35
+0:04
30K
18.64 mi12:05:262:02:226:3421:05
6:47
+0:12
20M
20.00 mi12:14:472:11:436:359:21
6:53
+0:06
21M
21.00 mi12:22:102:19:066:377:23
7:23
+0:30
35K
21.75 mi12:27:122:24:086:385:02
6:44
-0:39
23M
23.00 mi12:35:432:32:396:388:31
6:48
+0:04
24M
24.00 mi12:42:212:39:176:386:38
6:38
-0:10
40K
24.85 mi12:48:092:45:056:395:48
6:47
+0:09
25.2M
25.20 mi12:50:412:47:376:392:32
7:21
+0:34
Finish
26.22 mi12:57:162:54:126:396:35
6:28
-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

6:27 /mi

Average Pace

6:39 /mi

Slowest Pace

7:23 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:44:17

94% of race

Time at Steady Pace

9:55

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:39 /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 mi10:23:2420:206:3320:20
6:33
#2520
10K
6.21 mi10:43:2740:236:3020:03
6:27
#2486
15K
9.32 mi11:03:361:00:326:3020:09
6:29
#2502
20K
12.43 mi11:23:561:20:526:3020:20
6:33
#2488
Half
13.11 mi11:28:231:25:196:304:27
6:31
#2505
25K
15.53 mi11:44:211:41:176:3115:58
6:35
#2517
30K
18.64 mi12:05:262:02:226:3421:05
6:47
#2538
20M
20.00 mi12:14:472:11:436:359:21
6:53
#2570
21M
21.00 mi12:22:102:19:066:377:23
7:23
#2592
35K
21.75 mi12:27:122:24:086:385:02
6:44
#2601
23M
23.00 mi12:35:432:32:396:388:31
6:48
#2568
24M
24.00 mi12:42:212:39:176:386:38
6:38
#2547
40K
24.85 mi12:48:092:45:056:395:48
6:47
#2548
25.2M
25.20 mi12:50:412:47:376:392:32
7:21
#2551
Finish
26.22 mi12:57:162:54:126:396:35
6:28
#2513
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi2520240524052554(Top 10%)2449(Top 16%)2449(Top 46%)
10K6.21 mi3.10 mi2486+342371+342371+342511(Top 9%)2400(Top 16%)2400(Top 45%)
15K9.32 mi3.11 mi2502-162390-192390-192554(Top 10%)2449(Top 16%)2449(Top 46%)
20K12.43 mi3.11 mi2488+142382+82382+82543(Top 10%)2435(Top 16%)2435(Top 46%)
Half13.11 mi0.68 mi2505-172400-182400-182898(Top 11%)2773(Top 18%)2773(Top 52%)
25K15.53 mi2.42 mi2517-122410-102410-102616(Top 10%)2504(Top 16%)2504(Top 47%)
30K18.64 mi3.11 mi2538-212428-182428-182874(Top 11%)2724(Top 18%)2724(Top 52%)
20M20.00 mi1.36 mi2570-322455-272455-273267(Top 12%)3056(Top 20%)3056(Top 58%)
21M21.00 mi1.00 mi2592-222480-252480-254024(Top 15%)3702(Top 24%)3702(Top 70%)
35K21.75 mi0.75 mi2601-92486-62486-63674(Top 14%)3391(Top 22%)3391(Top 64%)
23M23.00 mi1.25 mi2568+332455+312455+312660(Top 10%)2493(Top 16%)2493(Top 47%)
24M24.00 mi1.00 mi2547+212433+222433+222729(Top 10%)2538(Top 17%)2538(Top 48%)
40K24.85 mi0.85 mi2548-1243324332729(Top 10%)2515(Top 17%)2515(Top 48%)
25.2M25.20 mi0.35 mi2551-32435-22435-23104(Top 12%)2827(Top 19%)2827(Top 53%)
Finish26.22 mi1.02 mi2513+382397+382397+382288(Top 9%)2116(Top 14%)2116(Top 40%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 10%
×21stories
+97ft-345ft

Overall

2554

Males

2449

M18-39

2449

5K→10K

3.1 - 6.2 mi

Top 9%
×5stories
+79ft-138ft

Overall

2511

Males

2400

M18-39

2400

10K→15K

6.2 - 9.3 mi

Top 10%
×3stories
+67ft-78ft

Overall

2554

Males

2449

M18-39

2449

15K→20K

9.3 - 12.4 mi

Top 10%
×5stories
+106ft-86ft

Overall

2543

Males

2435

M18-39

2435

20K→Half

12.4 - 13.1 mi

Top 11%
×2stories
+19ft-37ft

Overall

2898

Males

2773

M18-39

2773

Half→25K

13.1 - 15.5 mi

Top 10%
×4stories
+66ft-88ft

Overall

2616

Males

2504

M18-39

2504

25K→30K

15.5 - 18.6 mi

Top 11%
×9stories
+181ft-148ft

Overall

2874

Males

2724

M18-39

2724

30K→20M

18.6 - 20.0 mi

Top 12%
×5stories
+64ft-50ft

Overall

3267

Males

3056

M18-39

3056

20M→21M

20.0 - 21.0 mi

Top 15%
×8stories
+106ft-24ft

Overall

4024

Males

3702

M18-39

3702

21M→35K

21.0 - 21.8 mi

Top 14%
×7stories
+17ft-86ft

Overall

3674

Males

3391

M18-39

3391

35K→23M

21.8 - 23.0 mi

Top 10%
×5stories
+23ft-63ft

Overall

2660

Males

2493

M18-39

2493

23M→24M

23.0 - 24.0 mi

Top 10%
×6stories
+12ft-82ft

Overall

2729

Males

2538

M18-39

2538

24M→40K

24.0 - 24.9 mi

Top 10%
×1story
+6ft-20ft

Overall

2729

Males

2515

M18-39

2515

40K→25.2M

24.9 - 25.2 mi

Top 12%
×1story
+13ft-16ft

Overall

3104

Males

2827

M18-39

2827

25.2M→Finish

25.2 - 26.2 mi

Top 9%
×2stories
+22ft-21ft

Overall

2288

Males

2116

M18-39

2116

Passing Analysis

Category:
Athletes Passed
677
Passed By
670
Net Change
+7
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#2520
5K → 10K159125+34#2520#2486
10K → 15K5773-16#2486#2502
15K → 20K7157+14#2502#2488
20K → Half522-17#2488#2505
Half → 25K4456-12#2505#2517
25K → 30K5879-21#2517#2538
30K → 20M2456-32#2538#2570
20M → 21M3355-22#2570#2592
21M → 35K1524-9#2592#2601
35K → 23M6431+33#2601#2568
23M → 24M4120+21#2568#2547
24M → 40K3334-1#2547#2548
40K → 25.2M1720-3#2548#2551
25.2M → Finish5618+38#2551#2513
TOTALS677670+7
📊

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