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BOSTON MARATHON 2023

Zhi Li

Bib: 12243•M

ON

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 32%
Gender (Male)
#0 / 15176
Top 47%
Masters (Masters Men)
#0 / 9891
Top 35%
Division (M50-54)
#0 / 2052
Top 31%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
24:03
Rank: #11807
Start → 5K
24:03 | 7:44/mi
10K· 6.21 mi
47:37
Rank: #11448 (+359)
5K → 10K
23:34 | 7:35/mi
15K· 9.32 mi
1:10:51
Rank: #10934 (+514)
10K → 15K
23:14 | 7:29/mi
20K· 12.43 mi
1:34:27
Rank: #10705 (+229)
15K → 20K
23:36 | 7:36/mi
Half· 13.11 mi
1:39:32
Rank: #10661 (+44)
20K → Half
5:05 | 7:27/mi
25K· 15.53 mi
1:58:02
Rank: #10463 (+198)
Half → 25K
18:30 | 7:38/mi
30K· 18.64 mi
2:21:51
Rank: #10038 (+425)
25K → 30K
23:49 | 7:40/mi
20M
2:32:12
Rank: #9817 (+221)
30K → 20M
10:21 | 7:37/mi
21M
2:40:04
Rank: #9612 (+205)
20M → 21M
7:52 | 7:52/mi
35K· 21.75 mi
2:45:17
Rank: #9398 (+214)
21M → 35K
5:13 | 6:58/mi
23M
2:54:24
Rank: #9100 (+298)
35K → 23M
9:07 | 7:17/mi
24M
3:01:25
Rank: #8843 (+257)
23M → 24M
7:01 | 7:01/mi
40K· 24.85 mi
3:07:38
Rank: #8689 (+154)
24M → 40K
6:13 | 7:16/mi
25.2M
3:10:23
Rank: #8640 (+49)
40K → 25.2M
2:45 | 7:58/mi
Finish· 26.22 mi
3:17:52
Rank: #8578 (+62)
25.2M → Finish
7:29 | 7:21/mi

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time1:39:32
Pace7:36 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:38:20
Pace7:30 /mi
📊Negative Split: 1.2% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:52:3524:037:4424:03
7:44
-
10K
6.21 mi11:16:0947:377:4023:34
7:35
-0:09
15K
9.32 mi11:39:231:10:517:3623:14
7:29
-0:06
20K
12.43 mi12:02:591:34:277:3623:36
7:36
+0:07
Half
13.11 mi12:08:041:39:327:365:05
7:27
-0:09
25K
15.53 mi12:26:341:58:027:3618:30
7:38
+0:11
30K
18.64 mi12:50:232:21:517:3723:49
7:40
+0:02
20M
20.00 mi13:00:442:32:127:3710:21
7:37
-0:03
21M
21.00 mi13:08:362:40:047:377:52
7:52
+0:15
35K
21.75 mi13:13:492:45:177:365:13
6:58
-0:54
23M
23.00 mi13:22:562:54:247:359:07
7:17
+0:19
24M
24.00 mi13:29:573:01:257:347:01
7:01
-0:16
40K
24.85 mi13:36:103:07:387:336:13
7:16
+0:15
25.2M
25.20 mi13:38:553:10:237:332:45
7:58
+0:42
Finish
26.22 mi13:46:243:17:527:337:29
7:21
-0:37

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

6:58 /mi

Average Pace

7:33 /mi

Slowest Pace

7:58 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:19:23

70% of race

Time at Steady Pace

58:29

30% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:33 /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 mi10:52:3524:037:4424:03
7:44
#11807
10K
6.21 mi11:16:0947:377:4023:34
7:35
#11448
15K
9.32 mi11:39:231:10:517:3623:14
7:29
#10934
20K
12.43 mi12:02:591:34:277:3623:36
7:36
#10705
Half
13.11 mi12:08:041:39:327:365:05
7:27
#10661
25K
15.53 mi12:26:341:58:027:3618:30
7:38
#10463
30K
18.64 mi12:50:232:21:517:3723:49
7:40
#10038
20M
20.00 mi13:00:442:32:127:3710:21
7:37
#9817
21M
21.00 mi13:08:362:40:047:377:52
7:52
#9612
35K
21.75 mi13:13:492:45:177:365:13
6:58
#9398
23M
23.00 mi13:22:562:54:247:359:07
7:17
#9100
24M
24.00 mi13:29:573:01:257:347:01
7:01
#8843
40K
24.85 mi13:36:103:07:387:336:13
7:16
#8689
25.2M
25.20 mi13:38:553:10:237:332:45
7:58
#8640
Finish
26.22 mi13:46:243:17:527:337:29
7:21
#8578
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi11807903090309980(Top 37%)8132(Top 54%)8132(Top 396%)
10K6.21 mi3.10 mi11448+3598854+1768854+17611172(Top 42%)8736(Top 58%)8736(Top 426%)
15K9.32 mi3.11 mi10934+5148619+2358619+2359980(Top 37%)8132(Top 54%)8132(Top 396%)
20K12.43 mi3.11 mi10705+2298497+1228497+12210048(Top 38%)8094(Top 53%)8094(Top 394%)
Half13.11 mi0.68 mi10661+448484+138484+139746(Top 37%)7939(Top 52%)7939(Top 387%)
25K15.53 mi2.42 mi10463+1988368+1168368+1169762(Top 37%)7849(Top 52%)7849(Top 383%)
30K18.64 mi3.11 mi10038+4258117+2518117+2518405(Top 32%)6927(Top 46%)6927(Top 338%)
20M20.00 mi1.36 mi9817+2217969+1487969+1487594(Top 29%)6339(Top 42%)6339(Top 309%)
21M21.00 mi1.00 mi9612+2057831+1387831+1386555(Top 25%)5593(Top 37%)5593(Top 273%)
35K21.75 mi0.75 mi9398+2147676+1557676+1555222(Top 20%)4673(Top 31%)4673(Top 228%)
23M23.00 mi1.25 mi9100+2987472+2047472+2045228(Top 20%)4636(Top 31%)4636(Top 226%)
24M24.00 mi1.00 mi8843+2577294+1787294+1784779(Top 18%)4270(Top 28%)4270(Top 208%)
40K24.85 mi0.85 mi8689+1547190+1047190+1045271(Top 20%)4532(Top 30%)4532(Top 221%)
25.2M25.20 mi0.35 mi8640+497157+337157+336352(Top 24%)5188(Top 34%)5188(Top 253%)
Finish26.22 mi1.02 mi8578+627095+627095+627397(Top 28%)5807(Top 38%)5807(Top 283%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 37%
×21stories
+97ft-345ft

Overall

9980

Males

8132

M50-54

8132

5K→10K

3.1 - 6.2 mi

Top 42%
×5stories
+79ft-138ft

Overall

11172

Males

8736

M50-54

8736

10K→15K

6.2 - 9.3 mi

Top 37%
×3stories
+67ft-78ft

Overall

9980

Males

8132

M50-54

8132

15K→20K

9.3 - 12.4 mi

Top 38%
×5stories
+106ft-86ft

Overall

10048

Males

8094

M50-54

8094

20K→Half

12.4 - 13.1 mi

Top 37%
×2stories
+19ft-37ft

Overall

9746

Males

7939

M50-54

7939

Half→25K

13.1 - 15.5 mi

Top 37%
×4stories
+66ft-88ft

Overall

9762

Males

7849

M50-54

7849

25K→30K

15.5 - 18.6 mi

Top 32%
×9stories
+181ft-148ft

Overall

8405

Males

6927

M50-54

6927

30K→20M

18.6 - 20.0 mi

Top 29%
×5stories
+64ft-50ft

Overall

7594

Males

6339

M50-54

6339

20M→21M

20.0 - 21.0 mi

Top 25%
×8stories
+106ft-24ft

Overall

6555

Males

5593

M50-54

5593

21M→35K

21.0 - 21.8 mi

Top 20%
×7stories
+17ft-86ft

Overall

5222

Males

4673

M50-54

4673

35K→23M

21.8 - 23.0 mi

Top 20%
×5stories
+23ft-63ft

Overall

5228

Males

4636

M50-54

4636

23M→24M

23.0 - 24.0 mi

Top 18%
×6stories
+12ft-82ft

Overall

4779

Males

4270

M50-54

4270

24M→40K

24.0 - 24.9 mi

Top 20%
×1story
+6ft-20ft

Overall

5271

Males

4532

M50-54

4532

40K→25.2M

24.9 - 25.2 mi

Top 24%
×1story
+13ft-16ft

Overall

6352

Males

5188

M50-54

5188

25.2M→Finish

25.2 - 26.2 mi

Top 28%
×2stories
+22ft-21ft

Overall

7397

Males

5807

M50-54

5807

Passing Analysis

Category:
Athletes Passed
3593*
Passed By
364
Net Change
+3229
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#11807
5K → 10K519160+359#11807#11448
10K → 15K54531+514#11448#10934
15K → 20K28859+229#10934#10705
20K → Half5612+44#10705#10661
Half → 25K22830+198#10661#10463
25K → 30K441*16+425#10463#10038
30K → 20M226*5+221#10038#9817
20M → 21M2149+205#9817#9612
21M → 35K2140+214#9612#9398
35K → 23M3002+298#9398#9100
23M → 24M2581+257#9100#8843
24M → 40K1584+154#8843#8689
40K → 25.2M523+49#8689#8640
25.2M → Finish9432+62#8640#8578
TOTALS3593*364+3229

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

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