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BOSTON MARATHON 2025

Laurent Serog

Bib: 9811•M

NY

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 48%
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M50-54)
#0 / 1996
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
23:59
Rank: #14126
Start → 5K
23:59 | 7:43/mi
10K· 6.21 mi
48:24
Rank: #14670 (-544)
5K → 10K
24:25 | 7:52/mi
15K· 9.32 mi
1:12:56
Rank: #14841 (-171)
10K → 15K
24:32 | 7:54/mi
20K· 12.43 mi
1:37:36
Rank: #14690 (+151)
15K → 20K
24:40 | 7:56/mi
Half· 13.11 mi
1:42:59
Rank: #14712 (-22)
20K → Half
5:23 | 7:53/mi
25K· 15.53 mi
2:02:13
Rank: #14447 (+265)
Half → 25K
19:14 | 7:56/mi
30K· 18.64 mi
2:27:32
Rank: #13995 (+452)
25K → 30K
25:19 | 8:09/mi
20M
2:38:47
Rank: #13818 (+177)
30K → 20M
11:15 | 8:17/mi
21M
2:47:39
Rank: #13726 (+92)
20M → 21M
8:52 | 8:52/mi
35K· 21.75 mi
2:53:52
Rank: #13733 (-7)
21M → 35K
6:13 | 8:19/mi
23M
3:04:30
Rank: #13674 (+59)
35K → 23M
10:38 | 8:30/mi
24M
3:12:59
Rank: #13729 (-55)
23M → 24M
8:29 | 8:29/mi
40K· 24.85 mi
3:20:17
Rank: #13699 (+30)
24M → 40K
7:18 | 8:32/mi
25.2M
3:23:27
Rank: #13685 (+14)
40K → 25.2M
3:10 | 9:11/mi
Finish· 26.22 mi
3:31:46
Rank: #13686 (-1)
25.2M → Finish
8:19 | 8:10/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:42:59
Pace7:51 /mi
2nd Half
Distance13.11 mi
Time1:48:47
Pace8:18 /mi
📊Positive Split: 5.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:16:3523:597:4323:59
7:43
-
10K
6.21 mi11:41:0048:247:4724:25
7:52
+0:09
15K
9.32 mi12:05:321:12:567:4924:32
7:54
+0:02
20K
12.43 mi12:30:121:37:367:5124:40
7:56
+0:02
Half
13.11 mi12:35:351:42:597:515:23
7:53
-0:03
25K
15.53 mi12:54:492:02:137:5219:14
7:56
+0:03
30K
18.64 mi13:20:082:27:327:5525:19
8:09
+0:13
20M
20.00 mi13:31:232:38:477:5611:15
8:17
+0:08
21M
21.00 mi13:40:152:47:397:598:52
8:52
+0:35
35K
21.75 mi13:46:282:53:528:006:13
8:19
-0:33
23M
23.00 mi13:57:063:04:308:0110:38
8:30
+0:11
24M
24.00 mi14:05:353:12:598:028:29
8:29
-0:01
40K
24.85 mi14:12:533:20:178:037:18
8:32
+0:03
25.2M
25.20 mi14:16:033:23:278:043:10
9:11
+0:39
Finish
26.22 mi14:24:223:31:468:058:19
8:10
-1:01

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

7:43 /mi

Average Pace

8:05 /mi

Slowest Pace

9:11 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:01:48

86% of race

Time at Steady Pace

26:48

13% of race

Time at Slower Pace

3:10

1% of race

Average Pace: 8:05 /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 mi11:16:3523:597:4323:59
7:43
#14126
10K
6.21 mi11:41:0048:247:4724:25
7:52
#14670
15K
9.32 mi12:05:321:12:567:4924:32
7:54
#14841
20K
12.43 mi12:30:121:37:367:5124:40
7:56
#14690
Half
13.11 mi12:35:351:42:597:515:23
7:53
#14712
25K
15.53 mi12:54:492:02:137:5219:14
7:56
#14447
30K
18.64 mi13:20:082:27:327:5525:19
8:09
#13995
20M
20.00 mi13:31:232:38:477:5611:15
8:17
#13818
21M
21.00 mi13:40:152:47:397:598:52
8:52
#13726
35K
21.75 mi13:46:282:53:528:006:13
8:19
#13733
23M
23.00 mi13:57:063:04:308:0110:38
8:30
#13674
24M
24.00 mi14:05:353:12:598:028:29
8:29
#13729
40K
24.85 mi14:12:533:20:178:037:18
8:32
#13699
25.2M
25.20 mi14:16:033:23:278:043:10
9:11
#13685
Finish
26.22 mi14:24:223:31:468:058:19
8:10
#13686
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi14126100931009315199(Top 54%)10462(Top 65%)10462(Top 524%)
10K6.21 mi3.10 mi14670-54410279-18610279-18615331(Top 54%)10542(Top 65%)10542(Top 528%)
15K9.32 mi3.11 mi14841-17110334-5510334-5515199(Top 54%)10462(Top 65%)10462(Top 524%)
20K12.43 mi3.11 mi14690+15110245+8910245+8914430(Top 51%)10055(Top 62%)10055(Top 504%)
Half13.11 mi0.68 mi14712-2210251-610251-614935(Top 53%)10298(Top 64%)10298(Top 516%)
25K15.53 mi2.42 mi14447+26510102+14910102+14913350(Top 47%)9458(Top 59%)9458(Top 474%)
30K18.64 mi3.11 mi13995+4529852+2509852+25012426(Top 44%)8881(Top 55%)8881(Top 445%)
20M20.00 mi1.36 mi13818+1779742+1109742+11012342(Top 43%)8697(Top 54%)8697(Top 436%)
21M21.00 mi1.00 mi13726+929670+729670+7212698(Top 45%)8694(Top 54%)8694(Top 436%)
35K21.75 mi0.75 mi13733-79652+189652+1814268(Top 50%)9398(Top 58%)9398(Top 471%)
23M23.00 mi1.25 mi13674+599587+659587+6513254(Top 47%)8812(Top 55%)8812(Top 441%)
24M24.00 mi1.00 mi13729-559584+39584+314370(Top 51%)9314(Top 58%)9314(Top 467%)
40K24.85 mi0.85 mi13699+309544+409544+4013655(Top 48%)8836(Top 55%)8836(Top 443%)
25.2M25.20 mi0.35 mi13685+149524+209524+2012787(Top 45%)8372(Top 52%)8372(Top 419%)
Finish26.22 mi1.02 mi13686-19501+239501+2313988(Top 49%)9008(Top 56%)9008(Top 451%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 54%
×21stories
+97ft-345ft

Overall

15199

Males

10462

M50-54

10462

5K→10K

3.1 - 6.2 mi

Top 54%
×5stories
+79ft-138ft

Overall

15331

Males

10542

M50-54

10542

10K→15K

6.2 - 9.3 mi

Top 54%
×3stories
+67ft-78ft

Overall

15199

Males

10462

M50-54

10462

15K→20K

9.3 - 12.4 mi

Top 51%
×5stories
+106ft-86ft

Overall

14430

Males

10055

M50-54

10055

20K→Half

12.4 - 13.1 mi

Top 53%
×2stories
+19ft-37ft

Overall

14935

Males

10298

M50-54

10298

Half→25K

13.1 - 15.5 mi

Top 47%
×4stories
+66ft-88ft

Overall

13350

Males

9458

M50-54

9458

25K→30K

15.5 - 18.6 mi

Top 44%
×9stories
+181ft-148ft

Overall

12426

Males

8881

M50-54

8881

30K→20M

18.6 - 20.0 mi

Top 43%
×5stories
+64ft-50ft

Overall

12342

Males

8697

M50-54

8697

20M→21M

20.0 - 21.0 mi

Top 45%
×8stories
+106ft-24ft

Overall

12698

Males

8694

M50-54

8694

21M→35K

21.0 - 21.8 mi

Top 50%
×7stories
+17ft-86ft

Overall

14268

Males

9398

M50-54

9398

35K→23M

21.8 - 23.0 mi

Top 47%
×5stories
+23ft-63ft

Overall

13254

Males

8812

M50-54

8812

23M→24M

23.0 - 24.0 mi

Top 51%
×6stories
+12ft-82ft

Overall

14370

Males

9314

M50-54

9314

24M→40K

24.0 - 24.9 mi

Top 48%
×1story
+6ft-20ft

Overall

13655

Males

8836

M50-54

8836

40K→25.2M

24.9 - 25.2 mi

Top 45%
×1story
+13ft-16ft

Overall

12787

Males

8372

M50-54

8372

25.2M→Finish

25.2 - 26.2 mi

Top 49%
×2stories
+22ft-21ft

Overall

13988

Males

9008

M50-54

9008

Passing Analysis

Category:
Athletes Passed
2186
Passed By
1746
Net Change
+440
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#14126
5K → 10K129673-544#14126#14670
10K → 15K134305-171#14670#14841
15K → 20K272121+151#14841#14690
20K → Half2244-22#14690#14712
Half → 25K30641+265#14712#14447
25K → 30K50250+452#14447#13995
30K → 20M21235+177#13995#13818
20M → 21M15058+92#13818#13726
21M → 35K5461-7#13726#13733
35K → 23M14182+59#13733#13674
23M → 24M65120-55#13674#13729
24M → 40K9868+30#13729#13699
40K → 25.2M4026+14#13699#13685
25.2M → Finish6162-1#13685#13686
TOTALS21861746+440
📊

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