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BOSTON MARATHON 2023

Chao Li

Bib: 2938•M

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 41%
Gender (Male)
#0 / 15176
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
21:23
Rank: #5444
Start → 5K
21:23 | 6:53/mi
10K· 6.21 mi
43:20
Rank: #6353 (-909)
5K → 10K
21:57 | 7:04/mi
15K· 9.32 mi
1:05:53
Rank: #6897 (-544)
10K → 15K
22:33 | 7:15/mi
20K· 12.43 mi
1:30:04
Rank: #7875 (-978)
15K → 20K
24:11 | 7:47/mi
Half· 13.11 mi
1:35:26
Rank: #8117 (-242)
20K → Half
5:22 | 7:52/mi
25K· 15.53 mi
1:54:53
Rank: #8807 (-690)
Half → 25K
19:27 | 8:01/mi
30K· 18.64 mi
2:21:00
Rank: #9690 (-883)
25K → 30K
26:07 | 8:24/mi
20M
2:32:53
Rank: #10108 (-418)
30K → 20M
11:53 | 8:45/mi
21M
2:42:04
Rank: #10365 (-257)
20M → 21M
9:11 | 9:11/mi
35K· 21.75 mi
2:48:18
Rank: #10487 (-122)
21M → 35K
6:14 | 8:20/mi
23M
2:59:12
Rank: #10738 (-251)
35K → 23M
10:54 | 8:42/mi
24M
3:07:53
Rank: #10963 (-225)
23M → 24M
8:41 | 8:41/mi
40K· 24.85 mi
3:15:11
Rank: #11055 (-92)
24M → 40K
7:18 | 8:32/mi
25.2M
3:18:18
Rank: #11082 (-27)
40K → 25.2M
3:07 | 9:02/mi
Finish· 26.22 mi
3:26:05
Rank: #11001 (+81)
25.2M → Finish
7:47 | 7:38/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:35:26
Pace7:17 /mi
2nd Half
Distance13.11 mi
Time1:50:39
Pace8:26 /mi
📊Positive Split: 15.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:22:0821:236:5321:23
6:53
-
10K
6.21 mi10:44:0543:206:5821:57
7:04
+0:11
15K
9.32 mi11:06:381:05:537:0422:33
7:15
+0:11
20K
12.43 mi11:30:491:30:047:1524:11
7:47
+0:32
Half
13.11 mi11:36:111:35:267:175:22
7:52
+0:05
25K
15.53 mi11:55:381:54:537:2419:27
8:01
+0:09
30K
18.64 mi12:21:452:21:007:3426:07
8:24
+0:23
20M
20.00 mi12:33:382:32:537:3911:53
8:45
+0:21
21M
21.00 mi12:42:492:42:047:439:11
9:11
+0:26
35K
21.75 mi12:49:032:48:187:446:14
8:20
-0:51
23M
23.00 mi12:59:572:59:127:4710:54
8:42
+0:22
24M
24.00 mi13:08:383:07:537:508:41
8:41
-0:01
40K
24.85 mi13:15:563:15:117:517:18
8:32
-0:09
25.2M
25.20 mi13:19:033:18:187:523:07
9:02
+0:30
Finish
26.22 mi13:26:503:26:057:527:47
7:38
-1:24

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

6:53 /mi

Average Pace

7:52 /mi

Slowest Pace

9:11 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:43:13

50% of race

Time at Steady Pace

59:06

29% of race

Time at Slower Pace

43:46

21% of race

Average Pace: 7:52 /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 mi10:22:0821:236:5321:23
6:53
#5444
10K
6.21 mi10:44:0543:206:5821:57
7:04
#6353
15K
9.32 mi11:06:381:05:537:0422:33
7:15
#6897
20K
12.43 mi11:30:491:30:047:1524:11
7:47
#7875
Half
13.11 mi11:36:111:35:267:175:22
7:52
#8117
25K
15.53 mi11:55:381:54:537:2419:27
8:01
#8807
30K
18.64 mi12:21:452:21:007:3426:07
8:24
#9690
20M
20.00 mi12:33:382:32:537:3911:53
8:45
#10108
21M
21.00 mi12:42:492:42:047:439:11
9:11
#10365
35K
21.75 mi12:49:032:48:187:446:14
8:20
#10487
23M
23.00 mi12:59:572:59:127:4710:54
8:42
#10738
24M
24.00 mi13:08:383:07:537:508:41
8:41
#10963
40K
24.85 mi13:15:563:15:117:517:18
8:32
#11055
25.2M
25.20 mi13:19:033:18:187:523:07
9:02
#11082
Finish
26.22 mi13:26:503:26:057:527:47
7:38
#11001
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi5444502950298236(Top 31%)7073(Top 47%)7073(Top 134%)
10K6.21 mi3.10 mi6353-9095760-7315760-7317211(Top 27%)6389(Top 42%)6389(Top 121%)
15K9.32 mi3.11 mi6897-5446179-4196179-4198236(Top 31%)7073(Top 47%)7073(Top 134%)
20K12.43 mi3.11 mi7875-9786859-6806859-68011585(Top 44%)8836(Top 58%)8836(Top 167%)
Half13.11 mi0.68 mi8117-2427016-1577016-15713226(Top 50%)9556(Top 63%)9556(Top 181%)
25K15.53 mi2.42 mi8807-6907421-4057421-40512899(Top 48%)9305(Top 61%)9305(Top 176%)
30K18.64 mi3.11 mi9690-8837921-5007921-50013718(Top 52%)9535(Top 63%)9535(Top 180%)
20M20.00 mi1.36 mi10108-4188117-1968117-19615105(Top 57%)10021(Top 66%)10021(Top 190%)
21M21.00 mi1.00 mi10365-2578221-1048221-10414361(Top 54%)9643(Top 64%)9643(Top 182%)
35K21.75 mi0.75 mi10487-1228264-438264-4314237(Top 53%)9515(Top 63%)9515(Top 180%)
23M23.00 mi1.25 mi10738-2518346-828346-8214387(Top 54%)9519(Top 63%)9519(Top 180%)
24M24.00 mi1.00 mi10963-2258444-988444-9815522(Top 58%)9947(Top 66%)9947(Top 188%)
40K24.85 mi0.85 mi11055-928459-158459-1513550(Top 51%)9026(Top 59%)9026(Top 171%)
25.2M25.20 mi0.35 mi11082-278460-18460-112671(Top 48%)8584(Top 57%)8584(Top 162%)
Finish26.22 mi1.02 mi11001+818390+708390+709536(Top 36%)7042(Top 46%)7042(Top 133%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 31%
×21stories
+97ft-345ft

Overall

8236

Males

7073

M18-39

7073

5K→10K

3.1 - 6.2 mi

Top 27%
×5stories
+79ft-138ft

Overall

7211

Males

6389

M18-39

6389

10K→15K

6.2 - 9.3 mi

Top 31%
×3stories
+67ft-78ft

Overall

8236

Males

7073

M18-39

7073

15K→20K

9.3 - 12.4 mi

Top 44%
×5stories
+106ft-86ft

Overall

11585

Males

8836

M18-39

8836

20K→Half

12.4 - 13.1 mi

Top 50%
×2stories
+19ft-37ft

Overall

13226

Males

9556

M18-39

9556

Half→25K

13.1 - 15.5 mi

Top 48%
×4stories
+66ft-88ft

Overall

12899

Males

9305

M18-39

9305

25K→30K

15.5 - 18.6 mi

Top 52%
×9stories
+181ft-148ft

Overall

13718

Males

9535

M18-39

9535

30K→20M

18.6 - 20.0 mi

Top 57%
×5stories
+64ft-50ft

Overall

15105

Males

10021

M18-39

10021

20M→21M

20.0 - 21.0 mi

Top 54%
×8stories
+106ft-24ft

Overall

14361

Males

9643

M18-39

9643

21M→35K

21.0 - 21.8 mi

Top 53%
×7stories
+17ft-86ft

Overall

14237

Males

9515

M18-39

9515

35K→23M

21.8 - 23.0 mi

Top 54%
×5stories
+23ft-63ft

Overall

14387

Males

9519

M18-39

9519

23M→24M

23.0 - 24.0 mi

Top 58%
×6stories
+12ft-82ft

Overall

15522

Males

9947

M18-39

9947

24M→40K

24.0 - 24.9 mi

Top 51%
×1story
+6ft-20ft

Overall

13550

Males

9026

M18-39

9026

40K→25.2M

24.9 - 25.2 mi

Top 48%
×1story
+13ft-16ft

Overall

12671

Males

8584

M18-39

8584

25.2M→Finish

25.2 - 26.2 mi

Top 36%
×2stories
+22ft-21ft

Overall

9536

Males

7042

M18-39

7042

Passing Analysis

Category:
Athletes Passed
386
Passed By
5942
Net Change
-5557
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#5444
5K → 10K16925-909#5444#6353
10K → 15K21565-544#6353#6897
15K → 20K7985-978#6897#7875
20K → Half1243-242#7875#8117
Half → 25K11701-690#8117#8807
25K → 30K26909-883#8807#9690
30K → 20M21438-418#9690#10108
20M → 21M34291-257#10108#10365
21M → 35K23145-122#10365#10487
35K → 23M33284-251#10487#10738
23M → 24M22247-225#10738#10963
24M → 40K41133-92#10963#11055
40K → 25.2M2249-27#11055#11082
25.2M → Finish10827+81#11082#11001
TOTALS3865942-5557
📊

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