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BOSTON MARATHON 2023

Jingsong Cao

Bib: 13156•M

MA

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 31%
Gender (Male)
#0 / 15176
Top 46%
Masters (Masters Men)
#0 / 9891
Top 33%
Division (M50-54)
#0 / 2052
Top 29%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
22:49
Rank: #8401
Start → 5K
22:49 | 7:21/mi
10K· 6.21 mi
45:48
Rank: #8972 (-571)
5K → 10K
22:59 | 7:24/mi
15K· 9.32 mi
1:08:39
Rank: #8944 (+28)
10K → 15K
22:51 | 7:21/mi
20K· 12.43 mi
1:31:31
Rank: #8727 (+217)
15K → 20K
22:52 | 7:22/mi
Half· 13.11 mi
1:36:22
Rank: #8637 (+90)
20K → Half
4:51 | 7:07/mi
25K· 15.53 mi
1:54:21
Rank: #8517 (+120)
Half → 25K
17:59 | 7:25/mi
30K· 18.64 mi
2:18:28
Rank: #8592 (-75)
25K → 30K
24:07 | 7:46/mi
20M
2:29:09
Rank: #8618 (-26)
30K → 20M
10:41 | 7:52/mi
21M
2:37:14
Rank: #8549 (+69)
20M → 21M
8:05 | 8:05/mi
35K· 21.75 mi
2:42:48
Rank: #8527 (+22)
21M → 35K
5:34 | 7:26/mi
23M
2:52:33
Rank: #8490 (+37)
35K → 23M
9:45 | 7:47/mi
24M
3:00:05
Rank: #8426 (+64)
23M → 24M
7:32 | 7:32/mi
40K· 24.85 mi
3:06:47
Rank: #8424 (+2)
24M → 40K
6:42 | 7:50/mi
25.2M
3:09:36
Rank: #8392 (+32)
40K → 25.2M
2:49 | 8:10/mi
Finish· 26.22 mi
3:17:07
Rank: #8334 (+58)
25.2M → Finish
7:31 | 7:23/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:36:22
Pace7:21 /mi
2nd Half
Distance13.11 mi
Time1:40:45
Pace7:41 /mi
📊Positive Split: 4.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:51:2322:497:2122:49
7:21
-
10K
6.21 mi11:14:2245:487:2222:59
7:24
+0:03
15K
9.32 mi11:37:131:08:397:2222:51
7:21
-0:03
20K
12.43 mi12:00:051:31:317:2222:52
7:22
+0:01
Half
13.11 mi12:04:561:36:227:214:51
7:07
-0:15
25K
15.53 mi12:22:551:54:217:2217:59
7:25
+0:18
30K
18.64 mi12:47:022:18:287:2624:07
7:46
+0:21
20M
20.00 mi12:57:432:29:097:2710:41
7:52
+0:06
21M
21.00 mi13:05:482:37:147:298:05
8:05
+0:13
35K
21.75 mi13:11:222:42:487:295:34
7:26
-0:39
23M
23.00 mi13:21:072:52:337:309:45
7:47
+0:21
24M
24.00 mi13:28:393:00:057:307:32
7:32
-0:15
40K
24.85 mi13:35:213:06:477:316:42
7:50
+0:18
25.2M
25.20 mi13:38:103:09:367:312:49
8:10
+0:20
Finish
26.22 mi13:45:413:17:077:317:31
7:23
-0:47

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

7:07 /mi

Average Pace

7:31 /mi

Slowest Pace

8:10 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:48:50

86% of race

Time at Steady Pace

28:17

14% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:31 /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 mi10:51:2322:497:2122:49
7:21
#8401
10K
6.21 mi11:14:2245:487:2222:59
7:24
#8972
15K
9.32 mi11:37:131:08:397:2222:51
7:21
#8944
20K
12.43 mi12:00:051:31:317:2222:52
7:22
#8727
Half
13.11 mi12:04:561:36:227:214:51
7:07
#8637
25K
15.53 mi12:22:551:54:217:2217:59
7:25
#8517
30K
18.64 mi12:47:022:18:287:2624:07
7:46
#8592
20M
20.00 mi12:57:432:29:097:2710:41
7:52
#8618
21M
21.00 mi13:05:482:37:147:298:05
8:05
#8549
35K
21.75 mi13:11:222:42:487:295:34
7:26
#8527
23M
23.00 mi13:21:072:52:337:309:45
7:47
#8490
24M
24.00 mi13:28:393:00:057:307:32
7:32
#8426
40K
24.85 mi13:35:213:06:477:316:42
7:50
#8424
25.2M
25.20 mi13:38:103:09:367:312:49
8:10
#8392
Finish
26.22 mi13:45:413:17:077:317:31
7:23
#8334
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi8401723772378963(Top 34%)7519(Top 50%)7519(Top 366%)
10K6.21 mi3.10 mi8972-5717560-3237560-3239583(Top 36%)7911(Top 52%)7911(Top 386%)
15K9.32 mi3.11 mi8944+287524+367524+368963(Top 34%)7519(Top 50%)7519(Top 366%)
20K12.43 mi3.11 mi8727+2177390+1347390+1348211(Top 31%)7024(Top 46%)7024(Top 342%)
Half13.11 mi0.68 mi8637+907337+537337+537236(Top 27%)6405(Top 42%)6405(Top 312%)
25K15.53 mi2.42 mi8517+1207241+967241+968155(Top 31%)6906(Top 46%)6906(Top 337%)
30K18.64 mi3.11 mi8592-757251-107251-109054(Top 34%)7314(Top 48%)7314(Top 356%)
20M20.00 mi1.36 mi8618-267247+47247+49283(Top 35%)7343(Top 48%)7343(Top 358%)
21M21.00 mi1.00 mi8549+697181+667181+667879(Top 30%)6409(Top 42%)6409(Top 312%)
35K21.75 mi0.75 mi8527+227157+247157+248063(Top 30%)6534(Top 43%)6534(Top 318%)
23M23.00 mi1.25 mi8490+377113+447113+448310(Top 31%)6585(Top 43%)6585(Top 321%)
24M24.00 mi1.00 mi8426+647054+597054+597921(Top 30%)6269(Top 41%)6269(Top 306%)
40K24.85 mi0.85 mi8424+27033+217033+218885(Top 33%)6747(Top 44%)6747(Top 329%)
25.2M25.20 mi0.35 mi8392+327001+327001+327467(Top 28%)5867(Top 39%)5867(Top 286%)
Finish26.22 mi1.02 mi8334+586940+616940+617610(Top 29%)5939(Top 39%)5939(Top 289%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 34%
×21stories
+97ft-345ft

Overall

8963

Males

7519

M50-54

7519

5K→10K

3.1 - 6.2 mi

Top 36%
×5stories
+79ft-138ft

Overall

9583

Males

7911

M50-54

7911

10K→15K

6.2 - 9.3 mi

Top 34%
×3stories
+67ft-78ft

Overall

8963

Males

7519

M50-54

7519

15K→20K

9.3 - 12.4 mi

Top 31%
×5stories
+106ft-86ft

Overall

8211

Males

7024

M50-54

7024

20K→Half

12.4 - 13.1 mi

Top 27%
×2stories
+19ft-37ft

Overall

7236

Males

6405

M50-54

6405

Half→25K

13.1 - 15.5 mi

Top 31%
×4stories
+66ft-88ft

Overall

8155

Males

6906

M50-54

6906

25K→30K

15.5 - 18.6 mi

Top 34%
×9stories
+181ft-148ft

Overall

9054

Males

7314

M50-54

7314

30K→20M

18.6 - 20.0 mi

Top 35%
×5stories
+64ft-50ft

Overall

9283

Males

7343

M50-54

7343

20M→21M

20.0 - 21.0 mi

Top 30%
×8stories
+106ft-24ft

Overall

7879

Males

6409

M50-54

6409

21M→35K

21.0 - 21.8 mi

Top 30%
×7stories
+17ft-86ft

Overall

8063

Males

6534

M50-54

6534

35K→23M

21.8 - 23.0 mi

Top 31%
×5stories
+23ft-63ft

Overall

8310

Males

6585

M50-54

6585

23M→24M

23.0 - 24.0 mi

Top 30%
×6stories
+12ft-82ft

Overall

7921

Males

6269

M50-54

6269

24M→40K

24.0 - 24.9 mi

Top 33%
×1story
+6ft-20ft

Overall

8885

Males

6747

M50-54

6747

40K→25.2M

24.9 - 25.2 mi

Top 28%
×1story
+13ft-16ft

Overall

7467

Males

5867

M50-54

5867

25.2M→Finish

25.2 - 26.2 mi

Top 29%
×2stories
+22ft-21ft

Overall

7610

Males

5939

M50-54

5939

Passing Analysis

Category:
Athletes Passed
1505
Passed By
1438
Net Change
+67
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#8401
5K → 10K86657-571#8401#8972
10K → 15K159131+28#8972#8944
15K → 20K24932+217#8944#8727
20K → Half922+90#8727#8637
Half → 25K15636+120#8637#8517
25K → 30K140215-75#8517#8592
30K → 20M7298-26#8592#8618
20M → 21M10940+69#8618#8549
21M → 35K4725+22#8549#8527
35K → 23M9760+37#8527#8490
23M → 24M9935+64#8490#8426
24M → 40K5452+2#8426#8424
40K → 25.2M4816+32#8424#8392
25.2M → Finish9739+58#8392#8334
TOTALS15051438+67
📊

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