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BOSTON MARATHON 2023

Justin Peirce

Bib: 30443•M

MA

0:00
0:00
/ mi
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Overall
#0 / 26622
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
27:17
Rank: #19347
Start → 5K
27:17 | 8:47/mi
10K· 6.21 mi
52:03
Rank: #17030 (+2317)
5K → 10K
24:46 | 7:58/mi
15K· 9.32 mi
1:15:59
Rank: #15494 (+1536)
10K → 15K
23:56 | 7:42/mi
20K· 12.43 mi
1:40:33
Rank: #14791 (+703)
15K → 20K
24:34 | 7:54/mi
Half· 13.11 mi
1:45:54
Rank: #14718 (+73)
20K → Half
5:21 | 7:50/mi
25K· 15.53 mi
2:05:18
Rank: #14384 (+334)
Half → 25K
19:24 | 8:00/mi
30K· 18.64 mi
2:30:45
Rank: #13989 (+395)
25K → 30K
25:27 | 8:11/mi
20M
2:42:11
Rank: #13901 (+88)
30K → 20M
11:26 | 8:25/mi
21M
2:51:08
Rank: #13837 (+64)
20M → 21M
8:57 | 8:57/mi
35K· 21.75 mi
2:57:15
Rank: #13808 (+29)
21M → 35K
6:07 | 8:11/mi
23M
3:08:06
Rank: #13793 (+15)
35K → 23M
10:51 | 8:40/mi
24M
3:16:39
Rank: #13830 (-37)
23M → 24M
8:33 | 8:33/mi
40K· 24.85 mi
3:24:13
Rank: #13872 (-42)
24M → 40K
7:34 | 8:51/mi
25.2M
3:27:34
Rank: #13913 (-41)
40K → 25.2M
3:21 | 9:43/mi
Finish· 26.22 mi
3:36:06
Rank: #13935 (-22)
25.2M → Finish
8:32 | 8:22/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:45:54
Pace8:05 /mi
2nd Half
Distance13.11 mi
Time1:50:12
Pace8:24 /mi
📊Positive Split: 4.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:49:5327:178:4727:17
8:47
-
10K
6.21 mi12:14:3952:038:2324:46
7:58
-0:49
15K
9.32 mi12:38:351:15:598:0923:56
7:42
-0:16
20K
12.43 mi13:03:091:40:338:0524:34
7:54
+0:12
Half
13.11 mi13:08:301:45:548:055:21
7:50
-0:04
25K
15.53 mi13:27:542:05:188:0419:24
8:00
+0:10
30K
18.64 mi13:53:212:30:458:0525:27
8:11
+0:11
20M
20.00 mi14:04:472:42:118:0711:26
8:25
+0:14
21M
21.00 mi14:13:442:51:088:098:57
8:57
+0:32
35K
21.75 mi14:19:512:57:158:096:07
8:11
-0:46
23M
23.00 mi14:30:423:08:068:1110:51
8:40
+0:29
24M
24.00 mi14:39:153:16:398:128:33
8:33
-0:07
40K
24.85 mi14:46:493:24:138:137:34
8:51
+0:18
25.2M
25.20 mi14:50:103:27:348:143:21
9:43
+0:52
Finish
26.22 mi14:58:423:36:068:158:32
8:22
-1:21

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

7:42 /mi

Average Pace

8:15 /mi

Slowest Pace

9:43 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:38:01

45% of race

Time at Steady Pace

1:00:05

28% of race

Time at Slower Pace

58:00

27% of race

Average Pace: 8:15 /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 mi11:49:5327:178:4727:17
8:47
#19347
10K
6.21 mi12:14:3952:038:2324:46
7:58
#17030
15K
9.32 mi12:38:351:15:598:0923:56
7:42
#15494
20K
12.43 mi13:03:091:40:338:0524:34
7:54
#14791
Half
13.11 mi13:08:301:45:548:055:21
7:50
#14718
25K
15.53 mi13:27:542:05:188:0419:24
8:00
#14384
30K
18.64 mi13:53:212:30:458:0525:27
8:11
#13989
20M
20.00 mi14:04:472:42:118:0711:26
8:25
#13901
21M
21.00 mi14:13:442:51:088:098:57
8:57
#13837
35K
21.75 mi14:19:512:57:158:096:07
8:11
#13808
23M
23.00 mi14:30:423:08:068:1110:51
8:40
#13793
24M
24.00 mi14:39:153:16:398:128:33
8:33
#13830
40K
24.85 mi14:46:493:24:138:137:34
8:51
#13872
25.2M
25.20 mi14:50:103:27:348:143:21
9:43
#13913
Finish
26.22 mi14:58:423:36:068:158:32
8:22
#13935
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi19347119141191411866(Top 45%)9024(Top 59%)9024(Top 171%)
10K6.21 mi3.10 mi17030+231711073+84111073+84114582(Top 55%)10157(Top 67%)10157(Top 192%)
15K9.32 mi3.11 mi15494+153610499+57410499+57411866(Top 45%)9024(Top 59%)9024(Top 171%)
20K12.43 mi3.11 mi14791+70310223+27610223+27612676(Top 48%)9293(Top 61%)9293(Top 176%)
Half13.11 mi0.68 mi14718+7310192+3110192+3113066(Top 49%)9523(Top 63%)9523(Top 180%)
25K15.53 mi2.42 mi14384+33410030+16210030+16212742(Top 48%)9243(Top 61%)9243(Top 175%)
30K18.64 mi3.11 mi13989+3959838+1929838+19212286(Top 46%)8922(Top 59%)8922(Top 169%)
20M20.00 mi1.36 mi13901+889785+539785+5313087(Top 49%)9167(Top 60%)9167(Top 173%)
21M21.00 mi1.00 mi13837+649746+399746+3913106(Top 49%)9088(Top 60%)9088(Top 172%)
35K21.75 mi0.75 mi13808+299715+319715+3113259(Top 50%)9100(Top 60%)9100(Top 172%)
23M23.00 mi1.25 mi13793+159681+349681+3414149(Top 53%)9429(Top 62%)9429(Top 178%)
24M24.00 mi1.00 mi13830-379660+219660+2114742(Top 55%)9633(Top 63%)9633(Top 182%)
40K24.85 mi0.85 mi13872-429662-29662-215326(Top 58%)9824(Top 65%)9824(Top 186%)
25.2M25.20 mi0.35 mi13913-419668-69668-616111(Top 61%)10155(Top 67%)10155(Top 192%)
Finish26.22 mi1.02 mi13935-229662+69662+614538(Top 55%)9507(Top 63%)9507(Top 180%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 45%
×21stories
+97ft-345ft

Overall

11866

Males

9024

M18-39

9024

5K→10K

3.1 - 6.2 mi

Top 55%
×5stories
+79ft-138ft

Overall

14582

Males

10157

M18-39

10157

10K→15K

6.2 - 9.3 mi

Top 45%
×3stories
+67ft-78ft

Overall

11866

Males

9024

M18-39

9024

15K→20K

9.3 - 12.4 mi

Top 48%
×5stories
+106ft-86ft

Overall

12676

Males

9293

M18-39

9293

20K→Half

12.4 - 13.1 mi

Top 49%
×2stories
+19ft-37ft

Overall

13066

Males

9523

M18-39

9523

Half→25K

13.1 - 15.5 mi

Top 48%
×4stories
+66ft-88ft

Overall

12742

Males

9243

M18-39

9243

25K→30K

15.5 - 18.6 mi

Top 46%
×9stories
+181ft-148ft

Overall

12286

Males

8922

M18-39

8922

30K→20M

18.6 - 20.0 mi

Top 49%
×5stories
+64ft-50ft

Overall

13087

Males

9167

M18-39

9167

20M→21M

20.0 - 21.0 mi

Top 49%
×8stories
+106ft-24ft

Overall

13106

Males

9088

M18-39

9088

21M→35K

21.0 - 21.8 mi

Top 50%
×7stories
+17ft-86ft

Overall

13259

Males

9100

M18-39

9100

35K→23M

21.8 - 23.0 mi

Top 53%
×5stories
+23ft-63ft

Overall

14149

Males

9429

M18-39

9429

23M→24M

23.0 - 24.0 mi

Top 55%
×6stories
+12ft-82ft

Overall

14742

Males

9633

M18-39

9633

24M→40K

24.0 - 24.9 mi

Top 58%
×1story
+6ft-20ft

Overall

15326

Males

9824

M18-39

9824

40K→25.2M

24.9 - 25.2 mi

Top 61%
×1story
+13ft-16ft

Overall

16111

Males

10155

M18-39

10155

25.2M→Finish

25.2 - 26.2 mi

Top 55%
×2stories
+22ft-21ft

Overall

14538

Males

9507

M18-39

9507

Passing Analysis

Category:
Athletes Passed
6030
Passed By
618
Net Change
+5412
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#19347
5K → 10K232811+2317#19347#17030
10K → 15K15382+1536#17030#15494
15K → 20K7107+703#15494#14791
20K → Half785+73#14791#14718
Half → 25K35218+334#14718#14384
25K → 30K42732+395#14384#13989
30K → 20M14052+88#13989#13901
20M → 21M11955+64#13901#13837
21M → 35K6435+29#13837#13808
35K → 23M8974+15#13808#13793
23M → 24M5996-37#13793#13830
24M → 40K5698-42#13830#13872
40K → 25.2M1354-41#13872#13913
25.2M → Finish5779-22#13913#13935
TOTALS6030618+5412
📊

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