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BOSTON MARATHON 2023

Jiahong Li

Bib: 19508•M

PA

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M55-59)
#0 / 1422
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
26:53
Rank: #18577
Start → 5K
26:53 | 8:39/mi
10K· 6.21 mi
54:38
Rank: #19628 (-1051)
5K → 10K
27:45 | 8:56/mi
15K· 9.32 mi
1:22:38
Rank: #19945 (-317)
10K → 15K
28:00 | 9:01/mi
20K· 12.43 mi
1:50:52
Rank: #19964 (-19)
15K → 20K
28:14 | 9:05/mi
Half· 13.11 mi
1:56:56
Rank: #19964
20K → Half
6:04 | 8:54/mi
25K· 15.53 mi
2:18:28
Rank: #19690 (+274)
Half → 25K
21:32 | 8:53/mi
30K· 18.64 mi
2:47:46
Rank: #19590 (+100)
25K → 30K
29:18 | 9:26/mi
20M
3:00:53
Rank: #19573 (+17)
30K → 20M
13:07 | 9:39/mi
21M
3:10:54
Rank: #19467 (+106)
20M → 21M
10:01 | 10:01/mi
35K· 21.75 mi
3:17:29
Rank: #19369 (+98)
21M → 35K
6:35 | 8:48/mi
23M
3:29:05
Rank: #19254 (+115)
35K → 23M
11:36 | 9:16/mi
24M
3:38:05
Rank: #19161 (+93)
23M → 24M
9:00 | 9:00/mi
40K· 24.85 mi
3:46:09
Rank: #19132 (+29)
24M → 40K
8:04 | 9:26/mi
25.2M
3:49:38
Rank: #19113 (+19)
40K → 25.2M
3:29 | 10:06/mi
Finish· 26.22 mi
3:58:56
Rank: #19121 (-8)
25.2M → Finish
9:18 | 9:08/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:56:56
Pace8:55 /mi
2nd Half
Distance13.11 mi
Time2:02:00
Pace9:18 /mi
📊Positive Split: 4.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:18:4926:538:3926:53
8:39
-
10K
6.21 mi11:46:3454:388:4827:45
8:56
+0:17
15K
9.32 mi12:14:341:22:388:5228:00
9:01
+0:05
20K
12.43 mi12:42:481:50:528:5528:14
9:05
+0:04
Half
13.11 mi12:48:521:56:568:556:04
8:54
-0:11
25K
15.53 mi13:10:242:18:288:5521:32
8:53
-0:01
30K
18.64 mi13:39:422:47:469:0029:18
9:26
+0:33
20M
20.00 mi13:52:493:00:539:0313:07
9:39
+0:13
21M
21.00 mi14:02:503:10:549:0510:01
10:01
+0:22
35K
21.75 mi14:09:253:17:299:056:35
8:48
-1:13
23M
23.00 mi14:21:013:29:059:0511:36
9:16
+0:28
24M
24.00 mi14:30:013:38:059:059:00
9:00
-0:16
40K
24.85 mi14:38:053:46:099:068:04
9:26
+0:26
25.2M
25.20 mi14:41:343:49:389:073:29
10:06
+0:40
Finish
26.22 mi14:50:523:58:569:079:18
9:08
-0:58

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

8:39 /mi

Average Pace

9:07 /mi

Slowest Pace

10:06 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:32:19

89% of race

Time at Steady Pace

26:37

11% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 9:07 /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 mi11:18:4926:538:3926:53
8:39
#18577
10K
6.21 mi11:46:3454:388:4827:45
8:56
#19628
15K
9.32 mi12:14:341:22:388:5228:00
9:01
#19945
20K
12.43 mi12:42:481:50:528:5528:14
9:05
#19964
Half
13.11 mi12:48:521:56:568:556:04
8:54
#19964
25K
15.53 mi13:10:242:18:288:5521:32
8:53
#19690
30K
18.64 mi13:39:422:47:469:0029:18
9:26
#19590
20M
20.00 mi13:52:493:00:539:0313:07
9:39
#19573
21M
21.00 mi14:02:503:10:549:0510:01
10:01
#19467
35K
21.75 mi14:09:253:17:299:056:35
8:48
#19369
23M
23.00 mi14:21:013:29:059:0511:36
9:16
#19254
24M
24.00 mi14:30:013:38:059:059:00
9:00
#19161
40K
24.85 mi14:38:053:46:099:068:04
9:26
#19132
25.2M
25.20 mi14:41:343:49:389:073:29
10:06
#19113
Finish
26.22 mi14:50:523:58:569:079:18
9:08
#19121
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM55-59Seg. OverallSeg. MalesSeg. M55-59
5K3.11 mi3.11 mi18577116381163820551(Top 77%)12544(Top 83%)12544(Top 882%)
10K6.21 mi3.10 mi19628-105112057-41912057-41920574(Top 77%)12528(Top 83%)12528(Top 881%)
15K9.32 mi3.11 mi19945-31712221-16412221-16420551(Top 77%)12544(Top 83%)12544(Top 882%)
20K12.43 mi3.11 mi19964-1912238-1712238-1720071(Top 75%)12339(Top 81%)12339(Top 868%)
Half13.11 mi0.68 mi1996412241-312241-319922(Top 75%)12275(Top 81%)12275(Top 863%)
25K15.53 mi2.42 mi19690+27412140+10112140+10118359(Top 69%)11581(Top 76%)11581(Top 814%)
30K18.64 mi3.11 mi19590+10012084+5612084+5619170(Top 72%)11858(Top 78%)11858(Top 834%)
20M20.00 mi1.36 mi19573+1712063+2112063+2119390(Top 73%)11854(Top 78%)11854(Top 834%)
21M21.00 mi1.00 mi19467+10612004+5912004+5918089(Top 68%)11260(Top 74%)11260(Top 792%)
35K21.75 mi0.75 mi19369+9811962+4211962+4216929(Top 64%)10678(Top 70%)10678(Top 751%)
23M23.00 mi1.25 mi19254+11511909+5311909+5317357(Top 65%)10862(Top 72%)10862(Top 764%)
24M24.00 mi1.00 mi19161+9311858+5111858+5117233(Top 65%)10738(Top 71%)10738(Top 755%)
40K24.85 mi0.85 mi19132+2911837+2111837+2118086(Top 68%)11082(Top 73%)11082(Top 779%)
25.2M25.20 mi0.35 mi19113+1911824+1311824+1317747(Top 67%)10906(Top 72%)10906(Top 767%)
Finish26.22 mi1.02 mi19121-811822+211822+218568(Top 70%)11345(Top 75%)11345(Top 798%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 77%
×21stories
+97ft-345ft

Overall

20551

Males

12544

M55-59

12544

5K→10K

3.1 - 6.2 mi

Top 77%
×5stories
+79ft-138ft

Overall

20574

Males

12528

M55-59

12528

10K→15K

6.2 - 9.3 mi

Top 77%
×3stories
+67ft-78ft

Overall

20551

Males

12544

M55-59

12544

15K→20K

9.3 - 12.4 mi

Top 75%
×5stories
+106ft-86ft

Overall

20071

Males

12339

M55-59

12339

20K→Half

12.4 - 13.1 mi

Top 75%
×2stories
+19ft-37ft

Overall

19922

Males

12275

M55-59

12275

Half→25K

13.1 - 15.5 mi

Top 69%
×4stories
+66ft-88ft

Overall

18359

Males

11581

M55-59

11581

25K→30K

15.5 - 18.6 mi

Top 72%
×9stories
+181ft-148ft

Overall

19170

Males

11858

M55-59

11858

30K→20M

18.6 - 20.0 mi

Top 73%
×5stories
+64ft-50ft

Overall

19390

Males

11854

M55-59

11854

20M→21M

20.0 - 21.0 mi

Top 68%
×8stories
+106ft-24ft

Overall

18089

Males

11260

M55-59

11260

21M→35K

21.0 - 21.8 mi

Top 64%
×7stories
+17ft-86ft

Overall

16929

Males

10678

M55-59

10678

35K→23M

21.8 - 23.0 mi

Top 65%
×5stories
+23ft-63ft

Overall

17357

Males

10862

M55-59

10862

23M→24M

23.0 - 24.0 mi

Top 65%
×6stories
+12ft-82ft

Overall

17233

Males

10738

M55-59

10738

24M→40K

24.0 - 24.9 mi

Top 68%
×1story
+6ft-20ft

Overall

18086

Males

11082

M55-59

11082

40K→25.2M

24.9 - 25.2 mi

Top 67%
×1story
+13ft-16ft

Overall

17747

Males

10906

M55-59

10906

25.2M→Finish

25.2 - 26.2 mi

Top 70%
×2stories
+22ft-21ft

Overall

18568

Males

11345

M55-59

11345

Passing Analysis

Category:
Athletes Passed
1562
Passed By
2106
Net Change
-544
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#18577
5K → 10K631114-1051#18577#19628
10K → 15K72389-317#19628#19945
15K → 20K170189-19#19945#19964
20K → Half35350#19964#19964
Half → 25K30127+274#19964#19690
25K → 30K202102+100#19690#19590
30K → 20M9780+17#19590#19573
20M → 21M13024+106#19573#19467
21M → 35K1068+98#19467#19369
35K → 23M13318+115#19369#19254
23M → 24M10714+93#19254#19161
24M → 40K6940+29#19161#19132
40K → 25.2M3213+19#19132#19113
25.2M → Finish4553-8#19113#19121
TOTALS15622106-544
📊

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