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BOSTON MARATHON 2023

Thomas Li

Bib: 5388•M

NY

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 23%
Gender (Male)
#0 / 15176
Top 36%
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
21:03
Rank: #4437
Start → 5K
21:03 | 6:47/mi
10K· 6.21 mi
41:54
Rank: #4414 (+23)
5K → 10K
20:51 | 6:43/mi
15K· 9.32 mi
1:02:59
Rank: #4583 (-169)
10K → 15K
21:05 | 6:47/mi
20K· 12.43 mi
1:24:26
Rank: #4785 (-202)
15K → 20K
21:27 | 6:54/mi
Half· 13.11 mi
1:29:08
Rank: #4859 (-74)
20K → Half
4:42 | 6:53/mi
25K· 15.53 mi
1:46:05
Rank: #4983 (-124)
Half → 25K
16:57 | 6:59/mi
30K· 18.64 mi
2:08:44
Rank: #5232 (-249)
25K → 30K
22:39 | 7:17/mi
20M
2:20:57
Rank: #5936 (-704)
30K → 20M
12:13 | 8:59/mi
21M
2:29:27
Rank: #6102 (-166)
20M → 21M
8:30 | 8:30/mi
35K· 21.75 mi
2:35:02
Rank: #6134 (-32)
21M → 35K
5:35 | 7:28/mi
23M
2:44:41
Rank: #6164 (-30)
35K → 23M
9:39 | 7:42/mi
24M
2:52:39
Rank: #6278 (-114)
23M → 24M
7:58 | 7:58/mi
40K· 24.85 mi
2:59:07
Rank: #6269 (+9)
24M → 40K
6:28 | 7:34/mi
25.2M
3:01:50
Rank: #6245 (+24)
40K → 25.2M
2:43 | 7:53/mi
Finish· 26.22 mi
3:08:49
Rank: #6137 (+108)
25.2M → Finish
6:59 | 6:51/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:29:08
Pace6:48 /mi
2nd Half
Distance13.11 mi
Time1:39:41
Pace7:36 /mi
📊Positive Split: 11.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:23:5121:036:4721:03
6:47
-
10K
6.21 mi10:44:4241:546:4520:51
6:43
-0:04
15K
9.32 mi11:05:471:02:596:4521:05
6:47
+0:04
20K
12.43 mi11:27:141:24:266:4821:27
6:54
+0:07
Half
13.11 mi11:31:561:29:086:484:42
6:53
-0:01
25K
15.53 mi11:48:531:46:056:5016:57
6:59
+0:06
30K
18.64 mi12:11:322:08:446:5422:39
7:17
+0:18
20M
20.00 mi12:23:452:20:577:0312:13
8:59
+1:42
21M
21.00 mi12:32:152:29:277:078:30
8:30
-0:29
35K
21.75 mi12:37:502:35:027:085:35
7:28
-1:02
23M
23.00 mi12:47:292:44:417:109:39
7:42
+0:14
24M
24.00 mi12:55:272:52:397:127:58
7:58
+0:16
40K
24.85 mi13:01:552:59:077:126:28
7:34
-0:24
25.2M
25.20 mi13:04:383:01:507:132:43
7:53
+0:19
Finish
26.22 mi13:11:373:08:497:126:59
6:51
-1:02

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

6:43 /mi

Average Pace

7:12 /mi

Slowest Pace

8:59 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:36:07

51% of race

Time at Steady Pace

51:39

27% of race

Time at Slower Pace

41:03

22% of race

Average Pace: 7:12 /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 mi10:23:5121:036:4721:03
6:47
#4437
10K
6.21 mi10:44:4241:546:4520:51
6:43
#4414
15K
9.32 mi11:05:471:02:596:4521:05
6:47
#4583
20K
12.43 mi11:27:141:24:266:4821:27
6:54
#4785
Half
13.11 mi11:31:561:29:086:484:42
6:53
#4859
25K
15.53 mi11:48:531:46:056:5016:57
6:59
#4983
30K
18.64 mi12:11:322:08:446:5422:39
7:17
#5232
20M
20.00 mi12:23:452:20:577:0312:13
8:59
#5936
21M
21.00 mi12:32:152:29:277:078:30
8:30
#6102
35K
21.75 mi12:37:502:35:027:085:35
7:28
#6134
23M
23.00 mi12:47:292:44:417:109:39
7:42
#6164
24M
24.00 mi12:55:272:52:397:127:58
7:58
#6278
40K
24.85 mi13:01:552:59:077:126:28
7:34
#6269
25.2M
25.20 mi13:04:383:01:507:132:43
7:53
#6245
Finish
26.22 mi13:11:373:08:497:126:59
6:51
#6137
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi4437414541454987(Top 19%)4631(Top 31%)4631(Top 88%)
10K6.21 mi3.10 mi4414+234133+124133+124457(Top 17%)4168(Top 27%)4168(Top 79%)
15K9.32 mi3.11 mi4583-1694280-1474280-1474987(Top 19%)4631(Top 31%)4631(Top 88%)
20K12.43 mi3.11 mi4785-2024463-1834463-1835386(Top 20%)4974(Top 33%)4974(Top 94%)
Half13.11 mi0.68 mi4859-744525-624525-625925(Top 22%)5434(Top 36%)5434(Top 103%)
25K15.53 mi2.42 mi4983-1244630-1054630-1055535(Top 21%)5093(Top 34%)5093(Top 96%)
30K18.64 mi3.11 mi5232-2494842-2124842-2125963(Top 22%)5346(Top 35%)5346(Top 101%)
20M20.00 mi1.36 mi5936-7045406-5645406-56416456(Top 62%)10590(Top 70%)10590(Top 200%)
21M21.00 mi1.00 mi6102-1665516-1105516-11010453(Top 39%)7822(Top 52%)7822(Top 148%)
35K21.75 mi0.75 mi6134-325535-195535-198188(Top 31%)6589(Top 43%)6589(Top 125%)
23M23.00 mi1.25 mi6164-305549-145549-147734(Top 29%)6259(Top 41%)6259(Top 118%)
24M24.00 mi1.00 mi6278-1145623-745623-7410954(Top 41%)7858(Top 52%)7858(Top 149%)
40K24.85 mi0.85 mi6269+95601+225601+227068(Top 27%)5661(Top 37%)5661(Top 107%)
25.2M25.20 mi0.35 mi6245+245577+245577+245772(Top 22%)4792(Top 32%)4792(Top 91%)
Finish26.22 mi1.02 mi6137+1085480+975480+974372(Top 16%)3830(Top 25%)3830(Top 72%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 19%
×21stories
+97ft-345ft

Overall

4987

Males

4631

M18-39

4631

5K→10K

3.1 - 6.2 mi

Top 17%
×5stories
+79ft-138ft

Overall

4457

Males

4168

M18-39

4168

10K→15K

6.2 - 9.3 mi

Top 19%
×3stories
+67ft-78ft

Overall

4987

Males

4631

M18-39

4631

15K→20K

9.3 - 12.4 mi

Top 20%
×5stories
+106ft-86ft

Overall

5386

Males

4974

M18-39

4974

20K→Half

12.4 - 13.1 mi

Top 22%
×2stories
+19ft-37ft

Overall

5925

Males

5434

M18-39

5434

Half→25K

13.1 - 15.5 mi

Top 21%
×4stories
+66ft-88ft

Overall

5535

Males

5093

M18-39

5093

25K→30K

15.5 - 18.6 mi

Top 22%
×9stories
+181ft-148ft

Overall

5963

Males

5346

M18-39

5346

30K→20M

18.6 - 20.0 mi

Top 62%
×5stories
+64ft-50ft

Overall

16456

Males

10590

M18-39

10590

20M→21M

20.0 - 21.0 mi

Top 39%
×8stories
+106ft-24ft

Overall

10453

Males

7822

M18-39

7822

21M→35K

21.0 - 21.8 mi

Top 31%
×7stories
+17ft-86ft

Overall

8188

Males

6589

M18-39

6589

35K→23M

21.8 - 23.0 mi

Top 29%
×5stories
+23ft-63ft

Overall

7734

Males

6259

M18-39

6259

23M→24M

23.0 - 24.0 mi

Top 41%
×6stories
+12ft-82ft

Overall

10954

Males

7858

M18-39

7858

24M→40K

24.0 - 24.9 mi

Top 27%
×1story
+6ft-20ft

Overall

7068

Males

5661

M18-39

5661

40K→25.2M

24.9 - 25.2 mi

Top 22%
×1story
+13ft-16ft

Overall

5772

Males

4792

M18-39

4792

25.2M→Finish

25.2 - 26.2 mi

Top 16%
×2stories
+22ft-21ft

Overall

4372

Males

3830

M18-39

3830

Passing Analysis

Category:
Athletes Passed
826
Passed By
2526
Net Change
-1700
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#4437
5K → 10K223200+23#4437#4414
10K → 15K67236-169#4414#4583
15K → 20K42244-202#4583#4785
20K → Half1084-74#4785#4859
Half → 25K65189-124#4859#4983
25K → 30K74323-249#4983#5232
30K → 20M5709-704#5232#5936
20M → 21M18184-166#5936#6102
21M → 35K2456-32#6102#6134
35K → 23M6191-30#6134#6164
23M → 24M31145-114#6164#6278
24M → 40K5243+9#6278#6269
40K → 25.2M328+24#6269#6245
25.2M → Finish12214+108#6245#6137
TOTALS8262526-1700
📊

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