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BOSTON MARATHON 2023

Tom Lau

Bib: 32116•M

NY

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

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
32:55
Rank: #24940
Start → 5K
32:55 | 10:36/mi
10K· 6.21 mi
1:06:02
Rank: #24964 (-24)
5K → 10K
33:07 | 10:40/mi
15K· 9.32 mi
1:39:17
Rank: #24899 (+65)
10K → 15K
33:15 | 10:42/mi
20K· 12.43 mi
2:13:00
Rank: #24766 (+133)
15K → 20K
33:43 | 10:51/mi
Half· 13.11 mi
2:20:20
Rank: #24766
20K → Half
7:20 | 10:45/mi
25K· 15.53 mi
2:47:49
Rank: #24713 (+53)
Half → 25K
27:29 | 11:20/mi
30K· 18.64 mi
3:22:57
Rank: #24506 (+207)
25K → 30K
35:08 | 11:18/mi
20M
3:39:43
Rank: #24510 (-4)
30K → 20M
16:46 | 12:20/mi
21M
3:52:54
Rank: #24503 (+7)
20M → 21M
13:11 | 13:11/mi
35K· 21.75 mi
4:02:45
Rank: #24597 (-94)
21M → 35K
9:51 | 13:10/mi
23M
4:17:35
Rank: #24552 (+45)
35K → 23M
14:50 | 11:51/mi
24M
4:27:55
Rank: #24448 (+104)
23M → 24M
10:20 | 10:20/mi
40K· 24.85 mi
4:36:57
Rank: #24357 (+91)
24M → 40K
9:02 | 10:34/mi
25.2M
4:41:00
Rank: #24324 (+33)
40K → 25.2M
4:03 | 11:45/mi
Finish· 26.22 mi
4:50:55
Rank: #24249 (+75)
25.2M → Finish
9:55 | 9:44/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:20:20
Pace10:42 /mi
2nd Half
Distance13.11 mi
Time2:30:35
Pace11:29 /mi
📊Positive Split: 7.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:54:5732:5510:3632:55
10:36
-
10K
6.21 mi12:28:041:06:0210:3833:07
10:40
+0:04
15K
9.32 mi13:01:191:39:1710:3933:15
10:42
+0:02
20K
12.43 mi13:35:022:13:0010:4233:43
10:51
+0:09
Half
13.11 mi13:42:222:20:2010:427:20
10:45
-0:06
25K
15.53 mi14:09:512:47:4910:4827:29
11:20
+0:35
30K
18.64 mi14:44:593:22:5710:5335:08
11:18
-0:02
20M
20.00 mi15:01:453:39:4310:5916:46
12:20
+1:02
21M
21.00 mi15:14:563:52:5411:0513:11
13:11
+0:51
35K
21.75 mi15:24:474:02:4511:109:51
13:10
-0:01
23M
23.00 mi15:39:374:17:3511:1214:50
11:51
-1:19
24M
24.00 mi15:49:574:27:5511:1010:20
10:20
-1:31
40K
24.85 mi15:58:594:36:5711:099:02
10:34
+0:14
25.2M
25.20 mi16:03:024:41:0011:094:03
11:45
+1:11
Finish
26.22 mi16:12:574:50:5511:069:55
9:44
-2:01

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

9:44 /mi

Average Pace

11:06 /mi

Slowest Pace

13:11 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

20:15

7% of race

Time at Steady Pace

3:31:59

73% of race

Time at Slower Pace

58:41

20% of race

Average Pace: 11:06 /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 mi11:54:5732:5510:3632:55
10:36
#24940
10K
6.21 mi12:28:041:06:0210:3833:07
10:40
#24964
15K
9.32 mi13:01:191:39:1710:3933:15
10:42
#24899
20K
12.43 mi13:35:022:13:0010:4233:43
10:51
#24766
Half
13.11 mi13:42:222:20:2010:427:20
10:45
#24766
25K
15.53 mi14:09:512:47:4910:4827:29
11:20
#24713
30K
18.64 mi14:44:593:22:5710:5335:08
11:18
#24506
20M
20.00 mi15:01:453:39:4310:5916:46
12:20
#24510
21M
21.00 mi15:14:563:52:5411:0513:11
13:11
#24503
35K
21.75 mi15:24:474:02:4511:109:51
13:10
#24597
23M
23.00 mi15:39:374:17:3511:1214:50
11:51
#24552
24M
24.00 mi15:49:574:27:5511:1010:20
10:20
#24448
40K
24.85 mi15:58:594:36:5711:099:02
10:34
#24357
25.2M
25.20 mi16:03:024:41:0011:094:03
11:45
#24324
Finish
26.22 mi16:12:574:50:5511:069:55
9:44
#24249
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi24940145121451224803(Top 93%)14429(Top 95%)14429(Top 273%)
10K6.21 mi3.10 mi24964-2414530-1814530-1824947(Top 94%)14511(Top 96%)14511(Top 275%)
15K9.32 mi3.11 mi24899+6514494+3614494+3624803(Top 93%)14429(Top 95%)14429(Top 273%)
20K12.43 mi3.11 mi24766+13314420+7414420+7424394(Top 92%)14226(Top 94%)14226(Top 269%)
Half13.11 mi0.68 mi2476614414+614414+624583(Top 92%)14300(Top 94%)14300(Top 271%)
25K15.53 mi2.42 mi24713+5314383+3114383+3124457(Top 92%)14228(Top 94%)14228(Top 269%)
30K18.64 mi3.11 mi24506+20714277+10614277+10623595(Top 89%)13797(Top 91%)13797(Top 261%)
20M20.00 mi1.36 mi24510-414272+514272+524577(Top 92%)14175(Top 93%)14175(Top 268%)
21M21.00 mi1.00 mi24503+714262+1014262+1024285(Top 91%)14024(Top 92%)14024(Top 265%)
35K21.75 mi0.75 mi24597-9414295-3314295-3325680(Top 96%)14670(Top 97%)14670(Top 278%)
23M23.00 mi1.25 mi24552+4514271+2414271+2423782(Top 89%)13767(Top 91%)13767(Top 260%)
24M24.00 mi1.00 mi24448+10414210+6114210+6121635(Top 81%)12706(Top 84%)12706(Top 240%)
40K24.85 mi0.85 mi24357+9114163+4714163+4721367(Top 80%)12533(Top 83%)12533(Top 237%)
25.2M25.20 mi0.35 mi24324+3314146+1714146+1722045(Top 83%)12878(Top 85%)12878(Top 244%)
Finish26.22 mi1.02 mi24249+7514114+3214114+3220907(Top 79%)12387(Top 82%)12387(Top 234%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 93%
×21stories
+97ft-345ft

Overall

24803

Males

14429

M18-39

14429

5K→10K

3.1 - 6.2 mi

Top 94%
×5stories
+79ft-138ft

Overall

24947

Males

14511

M18-39

14511

10K→15K

6.2 - 9.3 mi

Top 93%
×3stories
+67ft-78ft

Overall

24803

Males

14429

M18-39

14429

15K→20K

9.3 - 12.4 mi

Top 92%
×5stories
+106ft-86ft

Overall

24394

Males

14226

M18-39

14226

20K→Half

12.4 - 13.1 mi

Top 92%
×2stories
+19ft-37ft

Overall

24583

Males

14300

M18-39

14300

Half→25K

13.1 - 15.5 mi

Top 92%
×4stories
+66ft-88ft

Overall

24457

Males

14228

M18-39

14228

25K→30K

15.5 - 18.6 mi

Top 89%
×9stories
+181ft-148ft

Overall

23595

Males

13797

M18-39

13797

30K→20M

18.6 - 20.0 mi

Top 92%
×5stories
+64ft-50ft

Overall

24577

Males

14175

M18-39

14175

20M→21M

20.0 - 21.0 mi

Top 91%
×8stories
+106ft-24ft

Overall

24285

Males

14024

M18-39

14024

21M→35K

21.0 - 21.8 mi

Top 96%
×7stories
+17ft-86ft

Overall

25680

Males

14670

M18-39

14670

35K→23M

21.8 - 23.0 mi

Top 89%
×5stories
+23ft-63ft

Overall

23782

Males

13767

M18-39

13767

23M→24M

23.0 - 24.0 mi

Top 81%
×6stories
+12ft-82ft

Overall

21635

Males

12706

M18-39

12706

24M→40K

24.0 - 24.9 mi

Top 80%
×1story
+6ft-20ft

Overall

21367

Males

12533

M18-39

12533

40K→25.2M

24.9 - 25.2 mi

Top 83%
×1story
+13ft-16ft

Overall

22045

Males

12878

M18-39

12878

25.2M→Finish

25.2 - 26.2 mi

Top 79%
×2stories
+22ft-21ft

Overall

20907

Males

12387

M18-39

12387

Passing Analysis

Category:
Athletes Passed
1303
Passed By
612
Net Change
+691
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#24940
5K → 10K177201-24#24940#24964
10K → 15K14176+65#24964#24899
15K → 20K17239+133#24899#24766
20K → Half23230#24766#24766
Half → 25K9845+53#24766#24713
25K → 30K22417+207#24713#24506
30K → 20M4246-4#24506#24510
20M → 21M4336+7#24510#24503
21M → 35K599-94#24503#24597
35K → 23M6621+45#24597#24552
23M → 24M1051+104#24552#24448
24M → 40K921+91#24448#24357
40K → 25.2M374+33#24357#24324
25.2M → Finish783+75#24324#24249
TOTALS1303612+691
📊

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