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BOSTON MARATHON 2023

Chao Li

Bib: 10623•M

TX

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

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
7:26/mi
23:06
↑ 97↓ 3451.5%
10K· 6.21 mi
7:15/mi
45:39
↑ 79↓ 1380.4%
15K· 9.32 mi
7:20/mi
1:08:26
↑ 67↓ 78
20K· 12.43 mi
7:25/mi
1:31:27
↑ 106↓ 860.1%
Half· 13.11 mi
7:15/mi
1:36:24
↑ 19↓ 370.5%
25K· 15.53 mi
7:25/mi
1:54:23
↑ 66↓ 880.2%
30K· 18.64 mi
7:43/mi
2:18:22
↑ 181↓ 1480.2%
20M
7:47/mi
2:28:56
↑ 64↓ 500.2%
21M
8:15/mi
2:37:11
↑ 106↓ 241.6%
35K· 21.75 mi
7:38/mi
2:42:54
↑ 17↓ 861.7%
23M
7:52/mi
2:52:45
↑ 23↓ 630.6%
24M
7:39/mi
3:00:24
↓ 821.3%
40K· 24.85 mi
7:36/mi
3:06:54
↓ 200.3%
25.2M
8:13/mi
3:09:44
↑ 13↓ 160.2%
Finish· 26.22 mi
7:17/mi
3:17:09
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:36:24
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 mi10:49:2223:067:2623:06
7:26
-
10K
6.21 mi11:11:5545:397:2122:33
7:15
-0:11
15K
9.32 mi11:34:421:08:267:2122:47
7:20
+0:05
20K
12.43 mi11:57:431:31:277:2223:01
7:25
+0:05
Half
13.11 mi12:02:401:36:247:214:57
7:15
-0:10
25K
15.53 mi12:20:391:54:237:2217:59
7:25
+0:10
30K
18.64 mi12:44:382:18:227:2523:59
7:43
+0:18
20M
20.00 mi12:55:122:28:567:2710:34
7:47
+0:04
21M
21.00 mi13:03:272:37:117:298:15
8:15
+0:28
35K
21.75 mi13:09:102:42:547:295:43
7:38
-0:37
23M
23.00 mi13:19:012:52:457:319:51
7:52
+0:14
24M
24.00 mi13:26:403:00:247:317:39
7:39
-0:13
40K
24.85 mi13:33:103:06:547:316:30
7:36
-0:03
25.2M
25.20 mi13:36:003:09:447:322:50
8:13
+0:37
Finish
26.22 mi13:43:253:17:097:317:25
7:17
-0:56

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

7:15 /mi

Average Pace

7:31 /mi

Slowest Pace

8:15 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:06:04

94% of race

Time at Steady Pace

11:05

6% 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 mi10:49:2223:067:2623:06
7:26
#9093
10K
6.21 mi11:11:5545:397:2122:33
7:15
#8778
15K
9.32 mi11:34:421:08:267:2122:47
7:20
#8779
20K
12.43 mi11:57:431:31:277:2223:01
7:25
#8683
Half
13.11 mi12:02:401:36:247:214:57
7:15
#8660
25K
15.53 mi12:20:391:54:237:2217:59
7:25
#8537
30K
18.64 mi12:44:382:18:227:2523:59
7:43
#8535
20M
20.00 mi12:55:122:28:567:2710:34
7:47
#8534
21M
21.00 mi13:03:272:37:117:298:15
8:15
#8535
35K
21.75 mi13:09:102:42:547:295:43
7:38
#8559
23M
23.00 mi13:19:012:52:457:319:51
7:52
#8543
24M
24.00 mi13:26:403:00:247:317:39
7:39
#8527
40K
24.85 mi13:33:103:06:547:316:30
7:36
#8465
25.2M
25.20 mi13:36:003:09:447:322:50
8:13
#8442
Finish
26.22 mi13:43:253:17:097:317:25
7:17
#8343
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi9093765376538817(Top 33%)7431(Top 49%)7431(Top 362%)
10K6.21 mi3.10 mi8778+3157449+2047449+2048534(Top 32%)7280(Top 48%)7280(Top 355%)
15K9.32 mi3.11 mi8779-17425+247425+248817(Top 33%)7431(Top 49%)7431(Top 362%)
20K12.43 mi3.11 mi8683+967363+627363+628575(Top 32%)7240(Top 48%)7240(Top 353%)
Half13.11 mi0.68 mi8660+237352+117352+118226(Top 31%)7040(Top 46%)7040(Top 343%)
25K15.53 mi2.42 mi8537+1237251+1017251+1018156(Top 31%)6907(Top 46%)6907(Top 337%)
30K18.64 mi3.11 mi8535+27214+377214+378772(Top 33%)7141(Top 47%)7141(Top 348%)
20M20.00 mi1.36 mi8534+17195+197195+198654(Top 33%)6987(Top 46%)6987(Top 340%)
21M21.00 mi1.00 mi8535-17174+217174+218877(Top 33%)6991(Top 46%)6991(Top 341%)
35K21.75 mi0.75 mi8559-247180-67180-69513(Top 36%)7350(Top 48%)7350(Top 358%)
23M23.00 mi1.25 mi8543+167143+377143+378837(Top 33%)6880(Top 45%)6880(Top 335%)
24M24.00 mi1.00 mi8527+167117+267117+268717(Top 33%)6735(Top 44%)6735(Top 328%)
40K24.85 mi0.85 mi8465+627058+597058+597332(Top 28%)5831(Top 38%)5831(Top 284%)
25.2M25.20 mi0.35 mi8442+237031+277031+277745(Top 29%)6021(Top 40%)6021(Top 293%)
Finish26.22 mi1.02 mi8343+996946+856946+856952(Top 26%)5535(Top 36%)5535(Top 270%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 33%
×21story building
+97ft-345ft

Overall

8817

Males

7431

M50-54

7431

5K→10K

3.1 - 6.2 mi

Top 32%
×5story building
+79ft-138ft

Overall

8534

Males

7280

M50-54

7280

10K→15K

6.2 - 9.3 mi

Top 33%
×3story building
+67ft-78ft

Overall

8817

Males

7431

M50-54

7431

15K→20K

9.3 - 12.4 mi

Top 32%
×5story building
+106ft-86ft

Overall

8575

Males

7240

M50-54

7240

20K→Half

12.4 - 13.1 mi

Top 31%
×2story building
+19ft-37ft

Overall

8226

Males

7040

M50-54

7040

Half→25K

13.1 - 15.5 mi

Top 31%
×4story building
+66ft-88ft

Overall

8156

Males

6907

M50-54

6907

25K→30K

15.5 - 18.6 mi

Top 33%
×9story building
+181ft-148ft

Overall

8772

Males

7141

M50-54

7141

30K→20M

18.6 - 20.0 mi

Top 33%
×5story building
+64ft-50ft

Overall

8654

Males

6987

M50-54

6987

20M→21M

20.0 - 21.0 mi

Top 33%
×8story building
+106ft-24ft

Overall

8877

Males

6991

M50-54

6991

21M→35K

21.0 - 21.8 mi

Top 36%
×7story building
+17ft-86ft

Overall

9513

Males

7350

M50-54

7350

35K→23M

21.8 - 23.0 mi

Top 33%
×5story building
+23ft-63ft

Overall

8837

Males

6880

M50-54

6880

23M→24M

23.0 - 24.0 mi

Top 33%
×6story building
+12ft-82ft

Overall

8717

Males

6735

M50-54

6735

24M→40K

24.0 - 24.9 mi

Top 28%
×1story
+6ft-20ft

Overall

7332

Males

5831

M50-54

5831

40K→25.2M

24.9 - 25.2 mi

Top 29%
×1story
+13ft-16ft

Overall

7745

Males

6021

M50-54

6021

25.2M→Finish

25.2 - 26.2 mi

Top 26%
×2story building
+22ft-21ft

Overall

6952

Males

5535

M50-54

5535

Passing Analysis

Category:
Athletes Passed
1726
Passed By
976
Net Change
+750
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#9093
5K → 10K446131+315#9093#8778
10K → 15K141142-1#8778#8779
15K → 20K17882+96#8779#8683
20K → Half3916+23#8683#8660
Half → 25K15128+123#8660#8537
25K → 30K172170+2#8537#8535
30K → 20M8382+1#8535#8534
20M → 21M7475-1#8534#8535
21M → 35K2852-24#8535#8559
35K → 23M9276+16#8559#8543
23M → 24M6953+16#8543#8527
24M → 40K9331+62#8527#8465
40K → 25.2M3916+23#8465#8442
25.2M → Finish12122+99#8442#8343
TOTALS1726976+750
📊

Passing Visuals

Category:
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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