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BOSTON MARATHON 2023

James Shi

Bib: 6243•M

CA

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 16%
Gender (Male)
#0 / 15176
Top 26%
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
21:24
Rank: #5459
Start → 5K
21:24 | 6:53/mi
10K· 6.21 mi
42:32
Rank: #5355 (+104)
5K → 10K
21:08 | 6:48/mi
15K· 9.32 mi
1:03:39
Rank: #5251 (+104)
10K → 15K
21:07 | 6:48/mi
20K· 12.43 mi
1:24:37
Rank: #4923 (+328)
15K → 20K
20:58 | 6:45/mi
Half· 13.11 mi
1:29:15
Rank: #4936 (-13)
20K → Half
4:38 | 6:47/mi
25K· 15.53 mi
1:45:40
Rank: #4720 (+216)
Half → 25K
16:25 | 6:46/mi
30K· 18.64 mi
2:07:37
Rank: #4714 (+6)
25K → 30K
21:57 | 7:04/mi
20M
2:17:11
Rank: #4665 (+49)
30K → 20M
9:34 | 7:02/mi
21M
2:24:33
Rank: #4610 (+55)
20M → 21M
7:22 | 7:22/mi
35K· 21.75 mi
2:29:37
Rank: #4573 (+37)
21M → 35K
5:04 | 6:46/mi
23M
2:38:18
Rank: #4473 (+100)
35K → 23M
8:41 | 6:56/mi
24M
2:44:56
Rank: #4355 (+118)
23M → 24M
6:38 | 6:38/mi
40K· 24.85 mi
2:50:45
Rank: #4270 (+85)
24M → 40K
5:49 | 6:48/mi
25.2M
2:53:18
Rank: #4248 (+22)
40K → 25.2M
2:33 | 7:24/mi
Finish· 26.22 mi
3:00:02
Rank: #4199 (+49)
25.2M → Finish
6:44 | 6:36/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:29:15
Pace6:48 /mi
2nd Half
Distance13.11 mi
Time1:30:47
Pace6:56 /mi
📊Positive Split: 1.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:25:3821:246:5321:24
6:53
-
10K
6.21 mi10:46:4642:326:5121:08
6:48
-0:05
15K
9.32 mi11:07:531:03:396:5021:07
6:48
0:00
20K
12.43 mi11:28:511:24:376:4920:58
6:45
-0:03
Half
13.11 mi11:33:291:29:156:484:38
6:47
+0:02
25K
15.53 mi11:49:541:45:406:4816:25
6:46
-0:01
30K
18.64 mi12:11:512:07:376:5121:57
7:04
+0:18
20M
20.00 mi12:21:252:17:116:529:34
7:02
-0:02
21M
21.00 mi12:28:472:24:336:537:22
7:22
+0:20
35K
21.75 mi12:33:512:29:376:535:04
6:46
-0:36
23M
23.00 mi12:42:322:38:186:538:41
6:56
+0:10
24M
24.00 mi12:49:102:44:566:526:38
6:38
-0:18
40K
24.85 mi12:54:592:50:456:525:49
6:48
+0:10
25.2M
25.20 mi12:57:322:53:186:532:33
7:24
+0:36
Finish
26.22 mi13:04:163:00:026:526:44
6:36
-0:48

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

6:36 /mi

Average Pace

6:52 /mi

Slowest Pace

7:24 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:50:07

94% of race

Time at Steady Pace

9:55

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:52 /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 mi10:25:3821:246:5321:24
6:53
#5459
10K
6.21 mi10:46:4642:326:5121:08
6:48
#5355
15K
9.32 mi11:07:531:03:396:5021:07
6:48
#5251
20K
12.43 mi11:28:511:24:376:4920:58
6:45
#4923
Half
13.11 mi11:33:291:29:156:484:38
6:47
#4936
25K
15.53 mi11:49:541:45:406:4816:25
6:46
#4720
30K
18.64 mi12:11:512:07:376:5121:57
7:04
#4714
20M
20.00 mi12:21:252:17:116:529:34
7:02
#4665
21M
21.00 mi12:28:472:24:336:537:22
7:22
#4610
35K
21.75 mi12:33:512:29:376:535:04
6:46
#4573
23M
23.00 mi12:42:322:38:186:538:41
6:56
#4473
24M
24.00 mi12:49:102:44:566:526:38
6:38
#4355
40K
24.85 mi12:54:592:50:456:525:49
6:48
#4270
25.2M
25.20 mi12:57:322:53:186:532:33
7:24
#4248
Finish
26.22 mi13:04:163:00:026:526:44
6:36
#4199
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi5459504250425070(Top 19%)4697(Top 31%)4697(Top 89%)
10K6.21 mi3.10 mi5355+1044945+974945+975312(Top 20%)4907(Top 32%)4907(Top 93%)
15K9.32 mi3.11 mi5251+1044864+814864+815070(Top 19%)4697(Top 31%)4697(Top 89%)
20K12.43 mi3.11 mi4923+3284583+2814583+2813962(Top 15%)3728(Top 25%)3728(Top 71%)
Half13.11 mi0.68 mi4936-134592-94592-95130(Top 19%)4740(Top 31%)4740(Top 90%)
25K15.53 mi2.42 mi4720+2164397+1954397+1953900(Top 15%)3668(Top 24%)3668(Top 69%)
30K18.64 mi3.11 mi4714+64394+34394+34742(Top 18%)4376(Top 29%)4376(Top 83%)
20M20.00 mi1.36 mi4665+494350+444350+444262(Top 16%)3933(Top 26%)3933(Top 74%)
21M21.00 mi1.00 mi4610+554295+554295+553972(Top 15%)3664(Top 24%)3664(Top 69%)
35K21.75 mi0.75 mi4573+374258+374258+374016(Top 15%)3691(Top 24%)3691(Top 70%)
23M23.00 mi1.25 mi4473+1004170+884170+883447(Top 13%)3195(Top 21%)3195(Top 60%)
24M24.00 mi1.00 mi4355+1184071+994071+992780(Top 10%)2589(Top 17%)2589(Top 49%)
40K24.85 mi0.85 mi4270+853990+813990+812864(Top 11%)2638(Top 17%)2638(Top 50%)
25.2M25.20 mi0.35 mi4248+223968+223968+223406(Top 13%)3089(Top 20%)3089(Top 58%)
Finish26.22 mi1.02 mi4199+493924+443924+443028(Top 11%)2737(Top 18%)2737(Top 52%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 19%
×21stories
+97ft-345ft

Overall

5070

Males

4697

M18-39

4697

5K→10K

3.1 - 6.2 mi

Top 20%
×5stories
+79ft-138ft

Overall

5312

Males

4907

M18-39

4907

10K→15K

6.2 - 9.3 mi

Top 19%
×3stories
+67ft-78ft

Overall

5070

Males

4697

M18-39

4697

15K→20K

9.3 - 12.4 mi

Top 15%
×5stories
+106ft-86ft

Overall

3962

Males

3728

M18-39

3728

20K→Half

12.4 - 13.1 mi

Top 19%
×2stories
+19ft-37ft

Overall

5130

Males

4740

M18-39

4740

Half→25K

13.1 - 15.5 mi

Top 15%
×4stories
+66ft-88ft

Overall

3900

Males

3668

M18-39

3668

25K→30K

15.5 - 18.6 mi

Top 18%
×9stories
+181ft-148ft

Overall

4742

Males

4376

M18-39

4376

30K→20M

18.6 - 20.0 mi

Top 16%
×5stories
+64ft-50ft

Overall

4262

Males

3933

M18-39

3933

20M→21M

20.0 - 21.0 mi

Top 15%
×8stories
+106ft-24ft

Overall

3972

Males

3664

M18-39

3664

21M→35K

21.0 - 21.8 mi

Top 15%
×7stories
+17ft-86ft

Overall

4016

Males

3691

M18-39

3691

35K→23M

21.8 - 23.0 mi

Top 13%
×5stories
+23ft-63ft

Overall

3447

Males

3195

M18-39

3195

23M→24M

23.0 - 24.0 mi

Top 10%
×6stories
+12ft-82ft

Overall

2780

Males

2589

M18-39

2589

24M→40K

24.0 - 24.9 mi

Top 11%
×1story
+6ft-20ft

Overall

2864

Males

2638

M18-39

2638

40K→25.2M

24.9 - 25.2 mi

Top 13%
×1story
+13ft-16ft

Overall

3406

Males

3089

M18-39

3089

25.2M→Finish

25.2 - 26.2 mi

Top 11%
×2stories
+22ft-21ft

Overall

3028

Males

2737

M18-39

2737

Passing Analysis

Category:
Athletes Passed
1815
Passed By
555
Net Change
+1260
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#5459
5K → 10K258154+104#5459#5355
10K → 15K16965+104#5355#5251
15K → 20K3379+328#5251#4923
20K → Half1528-13#4923#4936
Half → 25K23115+216#4936#4720
25K → 30K132126+6#4720#4714
30K → 20M9243+49#4714#4665
20M → 21M8429+55#4665#4610
21M → 35K5922+37#4610#4573
35K → 23M12424+100#4573#4473
23M → 24M1235+118#4473#4355
24M → 40K894+85#4355#4270
40K → 25.2M3311+22#4270#4248
25.2M → Finish6920+49#4248#4199
TOTALS1815555+1260
📊

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