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BOSTON MARATHON 2025

Sylvain Constant

Bib: 9614•M

QC

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 32%
Gender (Male)
#0 / 16105
Top 45%
Masters (Masters Men)
#0 / 10463
Top 33%
Division (M45-49)
#0 / 2386
Top 48%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
22:57
Rank: #11172
Start → 5K
22:57 | 7:23/mi
10K· 6.21 mi
45:13
Rank: #10142 (+1030)
5K → 10K
22:16 | 7:10/mi
15K· 9.32 mi
1:07:17
Rank: #9484 (+658)
10K → 15K
22:04 | 7:06/mi
20K· 12.43 mi
1:29:38
Rank: #9104 (+380)
15K → 20K
22:21 | 7:12/mi
Half· 13.11 mi
1:34:30
Rank: #9065 (+39)
20K → Half
4:52 | 7:08/mi
25K· 15.53 mi
1:52:12
Rank: #8882 (+183)
Half → 25K
17:42 | 7:18/mi
30K· 18.64 mi
2:16:03
Rank: #8815 (+67)
25K → 30K
23:51 | 7:41/mi
20M
2:26:41
Rank: #8812 (+3)
30K → 20M
10:38 | 7:49/mi
21M
2:35:28
Rank: #9017 (-205)
20M → 21M
8:47 | 8:47/mi
35K· 21.75 mi
2:40:58
Rank: #8914 (+103)
21M → 35K
5:30 | 7:21/mi
23M
2:50:30
Rank: #8759 (+155)
35K → 23M
9:32 | 7:37/mi
24M
2:58:32
Rank: #8860 (-101)
23M → 24M
8:02 | 8:02/mi
40K· 24.85 mi
3:05:41
Rank: #8980 (-120)
24M → 40K
7:09 | 8:22/mi
25.2M
3:08:53
Rank: #9061 (-81)
40K → 25.2M
3:12 | 9:17/mi
Finish· 26.22 mi
3:16:47
Rank: #9121 (-60)
25.2M → Finish
7:54 | 7:45/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:34:30
Pace7:13 /mi
2nd Half
Distance13.11 mi
Time1:42:17
Pace7:48 /mi
📊Positive Split: 8.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:49:3222:577:2322:57
7:23
-
10K
6.21 mi11:11:4845:137:1722:16
7:10
-0:13
15K
9.32 mi11:33:521:07:177:1322:04
7:06
-0:04
20K
12.43 mi11:56:131:29:387:1322:21
7:12
+0:06
Half
13.11 mi12:01:051:34:307:134:52
7:08
-0:04
25K
15.53 mi12:18:471:52:127:1317:42
7:18
+0:10
30K
18.64 mi12:42:382:16:037:1823:51
7:41
+0:23
20M
20.00 mi12:53:162:26:417:2010:38
7:49
+0:08
21M
21.00 mi13:02:032:35:287:248:47
8:47
+0:58
35K
21.75 mi13:07:332:40:587:245:30
7:21
-1:26
23M
23.00 mi13:17:052:50:307:259:32
7:37
+0:16
24M
24.00 mi13:25:072:58:327:268:02
8:02
+0:25
40K
24.85 mi13:32:163:05:417:287:09
8:22
+0:20
25.2M
25.20 mi13:35:283:08:537:303:12
9:17
+0:55
Finish
26.22 mi13:43:223:16:477:317:54
7:45
-1:32

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

7:06 /mi

Average Pace

7:31 /mi

Slowest Pace

9:17 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:29:15

45% of race

Time at Steady Pace

1:20:22

41% of race

Time at Slower Pace

27:10

14% of race

Average Pace: 7:30 /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 mi10:49:3222:577:2322:57
7:23
#11172
10K
6.21 mi11:11:4845:137:1722:16
7:10
#10142
15K
9.32 mi11:33:521:07:177:1322:04
7:06
#9484
20K
12.43 mi11:56:131:29:387:1322:21
7:12
#9104
Half
13.11 mi12:01:051:34:307:134:52
7:08
#9065
25K
15.53 mi12:18:471:52:127:1317:42
7:18
#8882
30K
18.64 mi12:42:382:16:037:1823:51
7:41
#8815
20M
20.00 mi12:53:162:26:417:2010:38
7:49
#8812
21M
21.00 mi13:02:032:35:287:248:47
8:47
#9017
35K
21.75 mi13:07:332:40:587:245:30
7:21
#8914
23M
23.00 mi13:17:052:50:307:259:32
7:37
#8759
24M
24.00 mi13:25:072:58:327:268:02
8:02
#8860
40K
24.85 mi13:32:163:05:417:287:09
8:22
#8980
25.2M
25.20 mi13:35:283:08:537:303:12
9:17
#9061
Finish
26.22 mi13:43:223:16:477:317:54
7:45
#9121
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi11172877987798349(Top 29%)7149(Top 44%)7149(Top 300%)
10K6.21 mi3.10 mi10142+10308235+5448235+5449204(Top 32%)7720(Top 48%)7720(Top 324%)
15K9.32 mi3.11 mi9484+6587866+3697866+3698349(Top 29%)7149(Top 44%)7149(Top 300%)
20K12.43 mi3.11 mi9104+3807621+2457621+2458149(Top 29%)6963(Top 43%)6963(Top 292%)
Half13.11 mi0.68 mi9065+397599+227599+228532(Top 30%)7215(Top 45%)7215(Top 302%)
25K15.53 mi2.42 mi8882+1837462+1377462+1378357(Top 29%)6972(Top 43%)6972(Top 292%)
30K18.64 mi3.11 mi8815+677363+997363+999021(Top 32%)7147(Top 44%)7147(Top 300%)
20M20.00 mi1.36 mi8812+37324+397324+399179(Top 32%)7090(Top 44%)7090(Top 297%)
21M21.00 mi1.00 mi9017-2057412-887412-8812160(Top 43%)8436(Top 52%)8436(Top 354%)
35K21.75 mi0.75 mi8914+1037332+807332+807561(Top 27%)6038(Top 37%)6038(Top 253%)
23M23.00 mi1.25 mi8759+1557201+1317201+1317334(Top 26%)5774(Top 36%)5774(Top 242%)
24M24.00 mi1.00 mi8860-1017222-217222-2111450(Top 40%)7871(Top 49%)7871(Top 330%)
40K24.85 mi0.85 mi8980-1207258-367258-3612501(Top 44%)8271(Top 51%)8271(Top 347%)
25.2M25.20 mi0.35 mi9061-817290-327290-3213264(Top 47%)8570(Top 53%)8570(Top 359%)
Finish26.22 mi1.02 mi9121-607278+127278+1211050(Top 39%)7527(Top 47%)7527(Top 315%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 29%
×21stories
+97ft-345ft

Overall

8349

Males

7149

M45-49

7149

5K→10K

3.1 - 6.2 mi

Top 32%
×5stories
+79ft-138ft

Overall

9204

Males

7720

M45-49

7720

10K→15K

6.2 - 9.3 mi

Top 29%
×3stories
+67ft-78ft

Overall

8349

Males

7149

M45-49

7149

15K→20K

9.3 - 12.4 mi

Top 29%
×5stories
+106ft-86ft

Overall

8149

Males

6963

M45-49

6963

20K→Half

12.4 - 13.1 mi

Top 30%
×2stories
+19ft-37ft

Overall

8532

Males

7215

M45-49

7215

Half→25K

13.1 - 15.5 mi

Top 29%
×4stories
+66ft-88ft

Overall

8357

Males

6972

M45-49

6972

25K→30K

15.5 - 18.6 mi

Top 32%
×9stories
+181ft-148ft

Overall

9021

Males

7147

M45-49

7147

30K→20M

18.6 - 20.0 mi

Top 32%
×5stories
+64ft-50ft

Overall

9179

Males

7090

M45-49

7090

20M→21M

20.0 - 21.0 mi

Top 43%
×8stories
+106ft-24ft

Overall

12160

Males

8436

M45-49

8436

21M→35K

21.0 - 21.8 mi

Top 27%
×7stories
+17ft-86ft

Overall

7561

Males

6038

M45-49

6038

35K→23M

21.8 - 23.0 mi

Top 26%
×5stories
+23ft-63ft

Overall

7334

Males

5774

M45-49

5774

23M→24M

23.0 - 24.0 mi

Top 40%
×6stories
+12ft-82ft

Overall

11450

Males

7871

M45-49

7871

24M→40K

24.0 - 24.9 mi

Top 44%
×1story
+6ft-20ft

Overall

12501

Males

8271

M45-49

8271

40K→25.2M

24.9 - 25.2 mi

Top 47%
×1story
+13ft-16ft

Overall

13264

Males

8570

M45-49

8570

25.2M→Finish

25.2 - 26.2 mi

Top 39%
×2stories
+22ft-21ft

Overall

11050

Males

7527

M45-49

7527

Passing Analysis

Category:
Athletes Passed
3303*
Passed By
1252
Net Change
+2051
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#11172
5K → 10K104919+1030#11172#10142
10K → 15K666*8+658#10142#9484
15K → 20K39919+380#9484#9104
20K → Half5617+39#9104#9065
Half → 25K24562+183#9065#8882
25K → 30K252185+67#8882#8815
30K → 20M9794+3#8815#8812
20M → 21M49254-205#8812#9017
21M → 35K11815+103#9017#8914
35K → 23M19439+155#8914#8759
23M → 24M48149-101#8759#8860
24M → 40K46166-120#8860#8980
40K → 25.2M20101-81#8980#9061
25.2M → Finish64124-60#9061#9121
TOTALS3303*1252+2051

* 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