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BOSTON MARATHON 2023

Sebastien Lacroix

Bib: 6127•M

QC

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 12%
Gender (Male)
#0 / 15176
Top 21%
Division (M18-39)
#0 / 5285
Top 43%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
6:48/mi
21:08
↑ 97↓ 3451.5%
10K· 6.21 mi
6:35/mi
41:35
↑ 79↓ 1380.4%
15K· 9.32 mi
6:35/mi
1:02:03
↑ 67↓ 78
20K· 12.43 mi
6:39/mi
1:22:42
↑ 106↓ 860.1%
Half· 13.11 mi
6:36/mi
1:27:12
↑ 19↓ 370.5%
25K· 15.53 mi
6:38/mi
1:43:17
↑ 66↓ 880.2%
30K· 18.64 mi
6:50/mi
2:04:30
↑ 181↓ 1480.2%
20M
6:59/mi
2:14:00
↑ 64↓ 500.2%
21M
7:35/mi
2:21:35
↑ 106↓ 241.6%
35K· 21.75 mi
6:38/mi
2:26:33
↑ 17↓ 861.7%
23M
6:55/mi
2:35:13
↑ 23↓ 630.6%
24M
6:47/mi
2:42:00
↓ 821.3%
40K· 24.85 mi
7:02/mi
2:48:01
↓ 200.3%
25.2M
7:21/mi
2:50:33
↑ 13↓ 160.2%
Finish· 26.22 mi
6:46/mi
2:57:27
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:27:12
Pace6:39 /mi
2nd Half
Distance13.11 mi
Time1:30:15
Pace6:53 /mi
📊Positive Split: 3.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:24:2621:086:4821:08
6:48
-
10K
6.21 mi10:44:5341:356:4220:27
6:35
-0:13
15K
9.32 mi11:05:211:02:036:3920:28
6:35
0:00
20K
12.43 mi11:26:001:22:426:3920:39
6:39
+0:04
Half
13.11 mi11:30:301:27:126:394:30
6:36
-0:03
25K
15.53 mi11:46:351:43:176:3916:05
6:38
+0:02
30K
18.64 mi12:07:482:04:306:4121:13
6:50
+0:12
20M
20.00 mi12:17:182:14:006:429:30
6:59
+0:09
21M
21.00 mi12:24:532:21:356:457:35
7:35
+0:36
35K
21.75 mi12:29:512:26:336:444:58
6:38
-0:57
23M
23.00 mi12:38:312:35:136:458:40
6:55
+0:17
24M
24.00 mi12:45:182:42:006:456:47
6:47
-0:08
40K
24.85 mi12:51:192:48:016:466:01
7:02
+0:15
25.2M
25.20 mi12:53:512:50:336:462:32
7:21
+0:19
Finish
26.22 mi13:00:452:57:276:466:54
6:46
-0:35

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

6:35 /mi

Average Pace

6:46 /mi

Slowest Pace

7:35 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:47:20

94% of race

Time at Steady Pace

10:07

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:46 /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 mi10:24:2621:086:4821:08
6:48
#4686
10K
6.21 mi10:44:5341:356:4220:27
6:35
#3889
15K
9.32 mi11:05:211:02:036:3920:28
6:35
#3611
20K
12.43 mi11:26:001:22:426:3920:39
6:39
#3489
Half
13.11 mi11:30:301:27:126:394:30
6:36
#3474
25K
15.53 mi11:46:351:43:176:3916:05
6:38
#3350
30K
18.64 mi12:07:482:04:306:4121:13
6:50
#3270
20M
20.00 mi12:17:182:14:006:429:30
6:59
#3286
21M
21.00 mi12:24:532:21:356:457:35
7:35
#3378
35K
21.75 mi12:29:512:26:336:444:58
6:38
#3353
23M
23.00 mi12:38:312:35:136:458:40
6:55
#3328
24M
24.00 mi12:45:182:42:006:456:47
6:47
#3326
40K
24.85 mi12:51:192:48:016:466:01
7:02
#3342
25.2M
25.20 mi12:53:512:50:336:462:32
7:21
#3318
Finish
26.22 mi13:00:452:57:276:466:54
6:46
#3318
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi4686436043603195(Top 12%)3041(Top 20%)3041(Top 58%)
10K6.21 mi3.10 mi3889+7973661+6993661+6993358(Top 13%)3195(Top 21%)3195(Top 60%)
15K9.32 mi3.11 mi3611+2783413+2483413+2483195(Top 12%)3041(Top 20%)3041(Top 58%)
20K12.43 mi3.11 mi3489+1223306+1073306+1073151(Top 12%)2997(Top 20%)2997(Top 57%)
Half13.11 mi0.68 mi3474+153290+163290+163392(Top 13%)3223(Top 21%)3223(Top 61%)
25K15.53 mi2.42 mi3350+1243184+1063184+1062915(Top 11%)2785(Top 18%)2785(Top 53%)
30K18.64 mi3.11 mi3270+803108+763108+763182(Top 12%)2998(Top 20%)2998(Top 57%)
20M20.00 mi1.36 mi3286-163115-73115-73950(Top 15%)3666(Top 24%)3666(Top 69%)
21M21.00 mi1.00 mi3378-923199-843199-844967(Top 19%)4445(Top 29%)4445(Top 84%)
35K21.75 mi0.75 mi3353+253174+253174+253216(Top 12%)3001(Top 20%)3001(Top 57%)
23M23.00 mi1.25 mi3328+253151+233151+233360(Top 13%)3113(Top 21%)3113(Top 59%)
24M24.00 mi1.00 mi3326+23148+33148+33543(Top 13%)3254(Top 21%)3254(Top 62%)
40K24.85 mi0.85 mi3342-163161-133161-134002(Top 15%)3584(Top 24%)3584(Top 68%)
25.2M25.20 mi0.35 mi3318+243137+243137+243137(Top 12%)2860(Top 19%)2860(Top 54%)
Finish26.22 mi1.02 mi33183136+13136+13879(Top 15%)3435(Top 23%)3435(Top 65%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 12%
×21story building
+97ft-345ft

Overall

3195

Males

3041

M18-39

3041

5K→10K

3.1 - 6.2 mi

Top 13%
×5story building
+79ft-138ft

Overall

3358

Males

3195

M18-39

3195

10K→15K

6.2 - 9.3 mi

Top 12%
×3story building
+67ft-78ft

Overall

3195

Males

3041

M18-39

3041

15K→20K

9.3 - 12.4 mi

Top 12%
×5story building
+106ft-86ft

Overall

3151

Males

2997

M18-39

2997

20K→Half

12.4 - 13.1 mi

Top 13%
×2story building
+19ft-37ft

Overall

3392

Males

3223

M18-39

3223

Half→25K

13.1 - 15.5 mi

Top 11%
×4story building
+66ft-88ft

Overall

2915

Males

2785

M18-39

2785

25K→30K

15.5 - 18.6 mi

Top 12%
×9story building
+181ft-148ft

Overall

3182

Males

2998

M18-39

2998

30K→20M

18.6 - 20.0 mi

Top 15%
×5story building
+64ft-50ft

Overall

3950

Males

3666

M18-39

3666

20M→21M

20.0 - 21.0 mi

Top 19%
×8story building
+106ft-24ft

Overall

4967

Males

4445

M18-39

4445

21M→35K

21.0 - 21.8 mi

Top 12%
×7story building
+17ft-86ft

Overall

3216

Males

3001

M18-39

3001

35K→23M

21.8 - 23.0 mi

Top 13%
×5story building
+23ft-63ft

Overall

3360

Males

3113

M18-39

3113

23M→24M

23.0 - 24.0 mi

Top 13%
×6story building
+12ft-82ft

Overall

3543

Males

3254

M18-39

3254

24M→40K

24.0 - 24.9 mi

Top 15%
×1story
+6ft-20ft

Overall

4002

Males

3584

M18-39

3584

40K→25.2M

24.9 - 25.2 mi

Top 12%
×1story
+13ft-16ft

Overall

3137

Males

2860

M18-39

2860

25.2M→Finish

25.2 - 26.2 mi

Top 15%
×2story building
+22ft-21ft

Overall

3879

Males

3435

M18-39

3435

Passing Analysis

Category:
Athletes Passed
1900
Passed By
532
Net Change
+1368
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#4686
5K → 10K82023+797#4686#3889
10K → 15K29921+278#3889#3611
15K → 20K14523+122#3611#3489
20K → Half3015+15#3489#3474
Half → 25K1339+124#3474#3350
25K → 30K13151+80#3350#3270
30K → 20M5874-16#3270#3286
20M → 21M24116-92#3286#3378
21M → 35K4318+25#3378#3353
35K → 23M6136+25#3353#3328
23M → 24M4139+2#3328#3326
24M → 40K3147-16#3326#3342
40K → 25.2M306+24#3342#3318
25.2M → Finish54540#3318#3318
TOTALS1900532+1368
📊

Passing Visuals

Category:
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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