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BOSTON MARATHON 2023

Justin Laroche

Bib: 29569•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
31:22
Rank: #23673
Start → 5K
31:22 | 10:06/mi
10K· 6.21 mi
1:01:40
Rank: #23444 (+229)
5K → 10K
30:18 | 9:45/mi
15K· 9.32 mi
1:32:24
Rank: #23404 (+40)
10K → 15K
30:44 | 9:54/mi
20K· 12.43 mi
2:02:29
Rank: #23079 (+325)
15K → 20K
30:05 | 9:41/mi
Half· 13.11 mi
2:09:33
Rank: #23135 (-56)
20K → Half
7:04 | 10:21/mi
25K· 15.53 mi
2:34:15
Rank: #23017 (+118)
Half → 25K
24:42 | 10:11/mi
30K· 18.64 mi
3:07:37
Rank: #22944 (+73)
25K → 30K
33:22 | 10:44/mi
20M
3:22:30
Rank: #22915 (+29)
30K → 20M
14:53 | 10:57/mi
21M
3:33:56
Rank: #22856 (+59)
20M → 21M
11:26 | 11:26/mi
35K· 21.75 mi
3:40:45
Rank: #22726 (+130)
21M → 35K
6:49 | 9:07/mi
23M
3:53:26
Rank: #22590 (+136)
35K → 23M
12:41 | 10:08/mi
24M
4:03:02
Rank: #22483 (+107)
23M → 24M
9:36 | 9:36/mi
40K· 24.85 mi
4:11:30
Rank: #22394 (+89)
24M → 40K
8:28 | 9:54/mi
25.2M
4:14:59
Rank: #22334 (+60)
40K → 25.2M
3:29 | 10:06/mi
Finish· 26.22 mi
4:24:00
Rank: #22214 (+120)
25.2M → Finish
9:01 | 8:51/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:09:33
Pace9:53 /mi
2nd Half
Distance13.11 mi
Time2:14:27
Pace10:15 /mi
📊Positive Split: 3.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:51:2931:2210:0631:22
10:06
-
10K
6.21 mi12:21:471:01:409:5530:18
9:45
-0:21
15K
9.32 mi12:52:311:32:249:5530:44
9:54
+0:09
20K
12.43 mi13:22:362:02:299:5130:05
9:41
-0:13
Half
13.11 mi13:29:402:09:339:537:04
10:21
+0:40
25K
15.53 mi13:54:222:34:159:5624:42
10:11
-0:10
30K
18.64 mi14:27:443:07:3710:0433:22
10:44
+0:33
20M
20.00 mi14:42:373:22:3010:0714:53
10:57
+0:13
21M
21.00 mi14:54:033:33:5610:1111:26
11:26
+0:29
35K
21.75 mi15:00:523:40:4510:096:49
9:07
-2:19
23M
23.00 mi15:13:333:53:2610:0912:41
10:08
+1:01
24M
24.00 mi15:23:094:03:0210:089:36
9:36
-0:32
40K
24.85 mi15:31:374:11:3010:078:28
9:54
+0:18
25.2M
25.20 mi15:35:064:14:5910:073:29
10:06
+0:12
Finish
26.22 mi15:44:074:24:0010:059:01
8:51
-1:15

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

8:51 /mi

Average Pace

10:05 /mi

Slowest Pace

11:26 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:25:49

33% of race

Time at Steady Pace

1:58:30

45% of race

Time at Slower Pace

59:41

23% of race

Average Pace: 10:04 /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 mi11:51:2931:2210:0631:22
10:06
#23673
10K
6.21 mi12:21:471:01:409:5530:18
9:45
#23444
15K
9.32 mi12:52:311:32:249:5530:44
9:54
#23404
20K
12.43 mi13:22:362:02:299:5130:05
9:41
#23079
Half
13.11 mi13:29:402:09:339:537:04
10:21
#23135
25K
15.53 mi13:54:222:34:159:5624:42
10:11
#23017
30K
18.64 mi14:27:443:07:3710:0433:22
10:44
#22944
20M
20.00 mi14:42:373:22:3010:0714:53
10:57
#22915
21M
21.00 mi14:54:033:33:5610:1111:26
11:26
#22856
35K
21.75 mi15:00:523:40:4510:096:49
9:07
#22726
23M
23.00 mi15:13:333:53:2610:0912:41
10:08
#22590
24M
24.00 mi15:23:094:03:0210:089:36
9:36
#22483
40K
24.85 mi15:31:374:11:3010:078:28
9:54
#22394
25.2M
25.20 mi15:35:064:14:5910:073:29
10:06
#22334
Finish
26.22 mi15:44:074:24:0010:059:01
8:51
#22214
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi23673139121391223282(Top 87%)13775(Top 91%)13775(Top 261%)
10K6.21 mi3.10 mi23444+22913828+8413828+8423159(Top 87%)13718(Top 90%)13718(Top 260%)
15K9.32 mi3.11 mi23404+4013824+413824+423282(Top 87%)13775(Top 91%)13775(Top 261%)
20K12.43 mi3.11 mi23079+32513669+15513669+15522098(Top 83%)13217(Top 87%)13217(Top 250%)
Half13.11 mi0.68 mi23135-5613692-2313692-2323916(Top 90%)14024(Top 92%)14024(Top 265%)
25K15.53 mi2.42 mi23017+11813628+6413628+6422577(Top 85%)13397(Top 88%)13397(Top 253%)
30K18.64 mi3.11 mi22944+7313567+6113567+6122676(Top 85%)13365(Top 88%)13365(Top 253%)
20M20.00 mi1.36 mi22915+2913542+2513542+2522621(Top 85%)13286(Top 88%)13286(Top 251%)
21M21.00 mi1.00 mi22856+5913505+3713505+3721738(Top 82%)12867(Top 85%)12867(Top 243%)
35K21.75 mi0.75 mi22726+13013431+7413431+7418381(Top 69%)11327(Top 75%)11327(Top 214%)
23M23.00 mi1.25 mi22590+13613364+6713364+6720374(Top 77%)12193(Top 80%)12193(Top 231%)
24M24.00 mi1.00 mi22483+10713310+5413310+5419565(Top 73%)11803(Top 78%)11803(Top 223%)
40K24.85 mi0.85 mi22394+8913260+5013260+5019697(Top 74%)11791(Top 78%)11791(Top 223%)
25.2M25.20 mi0.35 mi22334+6013237+2313237+2317766(Top 67%)10925(Top 72%)10925(Top 207%)
Finish26.22 mi1.02 mi22214+12013175+6213175+6217264(Top 65%)10736(Top 71%)10736(Top 203%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 87%
×21stories
+97ft-345ft

Overall

23282

Males

13775

M18-39

13775

5K→10K

3.1 - 6.2 mi

Top 87%
×5stories
+79ft-138ft

Overall

23159

Males

13718

M18-39

13718

10K→15K

6.2 - 9.3 mi

Top 87%
×3stories
+67ft-78ft

Overall

23282

Males

13775

M18-39

13775

15K→20K

9.3 - 12.4 mi

Top 83%
×5stories
+106ft-86ft

Overall

22098

Males

13217

M18-39

13217

20K→Half

12.4 - 13.1 mi

Top 90%
×2stories
+19ft-37ft

Overall

23916

Males

14024

M18-39

14024

Half→25K

13.1 - 15.5 mi

Top 85%
×4stories
+66ft-88ft

Overall

22577

Males

13397

M18-39

13397

25K→30K

15.5 - 18.6 mi

Top 85%
×9stories
+181ft-148ft

Overall

22676

Males

13365

M18-39

13365

30K→20M

18.6 - 20.0 mi

Top 85%
×5stories
+64ft-50ft

Overall

22621

Males

13286

M18-39

13286

20M→21M

20.0 - 21.0 mi

Top 82%
×8stories
+106ft-24ft

Overall

21738

Males

12867

M18-39

12867

21M→35K

21.0 - 21.8 mi

Top 69%
×7stories
+17ft-86ft

Overall

18381

Males

11327

M18-39

11327

35K→23M

21.8 - 23.0 mi

Top 77%
×5stories
+23ft-63ft

Overall

20374

Males

12193

M18-39

12193

23M→24M

23.0 - 24.0 mi

Top 73%
×6stories
+12ft-82ft

Overall

19565

Males

11803

M18-39

11803

24M→40K

24.0 - 24.9 mi

Top 74%
×1story
+6ft-20ft

Overall

19697

Males

11791

M18-39

11791

40K→25.2M

24.9 - 25.2 mi

Top 67%
×1story
+13ft-16ft

Overall

17766

Males

10925

M18-39

10925

25.2M→Finish

25.2 - 26.2 mi

Top 65%
×2stories
+22ft-21ft

Overall

17264

Males

10736

M18-39

10736

Passing Analysis

Category:
Athletes Passed
1970
Passed By
511
Net Change
+1459
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#23673
5K → 10K347118+229#23673#23444
10K → 15K151111+40#23444#23404
15K → 20K34015+325#23404#23079
20K → Half1066-56#23079#23135
Half → 25K16042+118#23135#23017
25K → 30K15582+73#23017#22944
30K → 20M7647+29#22944#22915
20M → 21M8021+59#22915#22856
21M → 35K1300+130#22856#22726
35K → 23M1426+136#22726#22590
23M → 24M1081+107#22590#22483
24M → 40K912+89#22483#22394
40K → 25.2M600+60#22394#22334
25.2M → Finish1200+120#22334#22214
TOTALS1970511+1459
📊

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