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BOSTON MARATHON 2023

Matthew Lacroix

Bib: 24620•M

MA

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 26%
Gender (Male)
#0 / 15176
Top 39%
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
23:30
Rank: #10170
Start → 5K
23:30 | 7:34/mi
10K· 6.21 mi
46:34
Rank: #9960 (+210)
5K → 10K
23:04 | 7:25/mi
15K· 9.32 mi
1:09:44
Rank: #9871 (+89)
10K → 15K
23:10 | 7:27/mi
20K· 12.43 mi
1:32:19
Rank: #9214 (+657)
15K → 20K
22:35 | 7:16/mi
Half· 13.11 mi
1:37:18
Rank: #9189 (+25)
20K → Half
4:59 | 7:18/mi
25K· 15.53 mi
1:54:58
Rank: #8835 (+354)
Half → 25K
17:40 | 7:17/mi
30K· 18.64 mi
2:17:43
Rank: #8261 (+574)
25K → 30K
22:45 | 7:19/mi
20M
2:27:48
Rank: #8098 (+163)
30K → 20M
10:05 | 7:25/mi
21M
2:35:22
Rank: #7846 (+252)
20M → 21M
7:34 | 7:34/mi
35K· 21.75 mi
2:40:34
Rank: #7716 (+130)
21M → 35K
5:12 | 6:57/mi
23M
2:49:29
Rank: #7453 (+263)
35K → 23M
8:55 | 7:07/mi
24M
2:56:31
Rank: #7299 (+154)
23M → 24M
7:02 | 7:02/mi
40K· 24.85 mi
3:02:21
Rank: #7109 (+190)
24M → 40K
5:50 | 6:49/mi
25.2M
3:04:50
Rank: #6995 (+114)
40K → 25.2M
2:29 | 7:12/mi
Finish· 26.22 mi
3:11:38
Rank: #6811 (+184)
25.2M → Finish
6:48 | 6:40/mi

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time1:37:18
Pace7:25 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:34:20
Pace7:12 /mi
📊Negative Split: 3.0% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:45:0223:307:3423:30
7:34
-
10K
6.21 mi12:08:0646:347:3023:04
7:25
-0:09
15K
9.32 mi12:31:161:09:447:2923:10
7:27
+0:02
20K
12.43 mi12:53:511:32:197:2622:35
7:16
-0:11
Half
13.11 mi12:58:501:37:187:254:59
7:18
+0:02
25K
15.53 mi13:16:301:54:587:2417:40
7:17
-0:01
30K
18.64 mi13:39:152:17:437:2322:45
7:19
+0:02
20M
20.00 mi13:49:202:27:487:2310:05
7:25
+0:06
21M
21.00 mi13:56:542:35:227:247:34
7:34
+0:09
35K
21.75 mi14:02:062:40:347:235:12
6:57
-0:37
23M
23.00 mi14:11:012:49:297:228:55
7:07
+0:10
24M
24.00 mi14:18:032:56:317:217:02
7:02
-0:05
40K
24.85 mi14:23:533:02:217:205:50
6:49
-0:13
25.2M
25.20 mi14:26:223:04:507:202:29
7:12
+0:23
Finish
26.22 mi14:33:103:11:387:196:48
6:40
-0:32

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

6:40 /mi

Average Pace

7:19 /mi

Slowest Pace

7:34 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:44:15

54% of race

Time at Steady Pace

1:27:23

46% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:19 /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 mi11:45:0223:307:3423:30
7:34
#10170
10K
6.21 mi12:08:0646:347:3023:04
7:25
#9960
15K
9.32 mi12:31:161:09:447:2923:10
7:27
#9871
20K
12.43 mi12:53:511:32:197:2622:35
7:16
#9214
Half
13.11 mi12:58:501:37:187:254:59
7:18
#9189
25K
15.53 mi13:16:301:54:587:2417:40
7:17
#8835
30K
18.64 mi13:39:152:17:437:2322:45
7:19
#8261
20M
20.00 mi13:49:202:27:487:2310:05
7:25
#8098
21M
21.00 mi13:56:542:35:227:247:34
7:34
#7846
35K
21.75 mi14:02:062:40:347:235:12
6:57
#7716
23M
23.00 mi14:11:012:49:297:228:55
7:07
#7453
24M
24.00 mi14:18:032:56:317:217:02
7:02
#7299
40K
24.85 mi14:23:533:02:217:205:50
6:49
#7109
25.2M
25.20 mi14:26:223:04:507:202:29
7:12
#6995
Finish
26.22 mi14:33:103:11:387:196:48
6:40
#6811
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi10170821082109798(Top 37%)8027(Top 53%)8027(Top 152%)
10K6.21 mi3.10 mi9960+2108119+918119+919822(Top 37%)8063(Top 53%)8063(Top 153%)
15K9.32 mi3.11 mi9871+898086+338086+339798(Top 37%)8027(Top 53%)8027(Top 152%)
20K12.43 mi3.11 mi9214+6577681+4057681+4057547(Top 28%)6591(Top 43%)6591(Top 125%)
Half13.11 mi0.68 mi9189+257661+207661+208556(Top 32%)7220(Top 48%)7220(Top 137%)
25K15.53 mi2.42 mi8835+3547437+2247437+2247191(Top 27%)6279(Top 41%)6279(Top 119%)
30K18.64 mi3.11 mi8261+5747036+4017036+4016159(Top 23%)5486(Top 36%)5486(Top 104%)
20M20.00 mi1.36 mi8098+1636918+1186918+1186298(Top 24%)5514(Top 36%)5514(Top 104%)
21M21.00 mi1.00 mi7846+2526749+1696749+1694927(Top 19%)4430(Top 29%)4430(Top 84%)
35K21.75 mi0.75 mi7716+1306650+996650+995086(Top 19%)4561(Top 30%)4561(Top 86%)
23M23.00 mi1.25 mi7453+2636456+1946456+1944416(Top 17%)4025(Top 27%)4025(Top 76%)
24M24.00 mi1.00 mi7299+1546334+1226334+1224844(Top 18%)4313(Top 28%)4313(Top 82%)
40K24.85 mi0.85 mi7109+1906191+1436191+1432975(Top 11%)2742(Top 18%)2742(Top 52%)
25.2M25.20 mi0.35 mi6995+1146099+926099+922591(Top 10%)2404(Top 16%)2404(Top 45%)
Finish26.22 mi1.02 mi6811+1845964+1355964+1353384(Top 13%)3042(Top 20%)3042(Top 58%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 37%
×21stories
+97ft-345ft

Overall

9798

Males

8027

M18-39

8027

5K→10K

3.1 - 6.2 mi

Top 37%
×5stories
+79ft-138ft

Overall

9822

Males

8063

M18-39

8063

10K→15K

6.2 - 9.3 mi

Top 37%
×3stories
+67ft-78ft

Overall

9798

Males

8027

M18-39

8027

15K→20K

9.3 - 12.4 mi

Top 28%
×5stories
+106ft-86ft

Overall

7547

Males

6591

M18-39

6591

20K→Half

12.4 - 13.1 mi

Top 32%
×2stories
+19ft-37ft

Overall

8556

Males

7220

M18-39

7220

Half→25K

13.1 - 15.5 mi

Top 27%
×4stories
+66ft-88ft

Overall

7191

Males

6279

M18-39

6279

25K→30K

15.5 - 18.6 mi

Top 23%
×9stories
+181ft-148ft

Overall

6159

Males

5486

M18-39

5486

30K→20M

18.6 - 20.0 mi

Top 24%
×5stories
+64ft-50ft

Overall

6298

Males

5514

M18-39

5514

20M→21M

20.0 - 21.0 mi

Top 19%
×8stories
+106ft-24ft

Overall

4927

Males

4430

M18-39

4430

21M→35K

21.0 - 21.8 mi

Top 19%
×7stories
+17ft-86ft

Overall

5086

Males

4561

M18-39

4561

35K→23M

21.8 - 23.0 mi

Top 17%
×5stories
+23ft-63ft

Overall

4416

Males

4025

M18-39

4025

23M→24M

23.0 - 24.0 mi

Top 18%
×6stories
+12ft-82ft

Overall

4844

Males

4313

M18-39

4313

24M→40K

24.0 - 24.9 mi

Top 11%
×1story
+6ft-20ft

Overall

2975

Males

2742

M18-39

2742

40K→25.2M

24.9 - 25.2 mi

Top 10%
×1story
+13ft-16ft

Overall

2591

Males

2404

M18-39

2404

25.2M→Finish

25.2 - 26.2 mi

Top 13%
×2stories
+22ft-21ft

Overall

3384

Males

3042

M18-39

3042

Passing Analysis

Category:
Athletes Passed
3753*
Passed By
394
Net Change
+3359
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#10170
5K → 10K416*206+210#10170#9960
10K → 15K231142+89#9960#9871
15K → 20K662*5+657#9871#9214
20K → Half3813+25#9214#9189
Half → 25K3540+354#9189#8835
25K → 30K5795+574#8835#8261
30K → 20M17714+163#8261#8098
20M → 21M2520+252#8098#7846
21M → 35K1322+130#7846#7716
35K → 23M2630+263#7716#7453
23M → 24M1573+154#7453#7299
24M → 40K1900+190#7299#7109
40K → 25.2M1140+114#7109#6995
25.2M → Finish1884+184#6995#6811
TOTALS3753*394+3359

* 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