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BOSTON MARATHON 2025

Sebastiaan Scheffer

Bib: 11686•M

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

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
23:35
Rank: #13026
Start → 5K
23:35 | 7:35/mi
10K· 6.21 mi
47:26
Rank: #13337 (-311)
5K → 10K
23:51 | 7:41/mi
15K· 9.32 mi
1:11:42
Rank: #13684 (-347)
10K → 15K
24:16 | 7:49/mi
20K· 12.43 mi
1:36:14
Rank: #13741 (-57)
15K → 20K
24:32 | 7:54/mi
Half· 13.11 mi
1:41:30
Rank: #13730 (+11)
20K → Half
5:16 | 7:43/mi
25K· 15.53 mi
2:00:57
Rank: #13772 (-42)
Half → 25K
19:27 | 8:01/mi
30K· 18.64 mi
2:28:23
Rank: #14362 (-590)
25K → 30K
27:26 | 8:50/mi
20M
2:39:47
Rank: #14225 (+137)
30K → 20M
11:24 | 8:23/mi
21M
2:48:49
Rank: #14165 (+60)
20M → 21M
9:02 | 9:02/mi
35K· 21.75 mi
2:54:51
Rank: #14089 (+76)
21M → 35K
6:02 | 8:04/mi
23M
3:05:21
Rank: #13994 (+95)
35K → 23M
10:30 | 8:23/mi
24M
3:13:44
Rank: #13995 (-1)
23M → 24M
8:23 | 8:23/mi
40K· 24.85 mi
3:20:59
Rank: #13933 (+62)
24M → 40K
7:15 | 8:29/mi
25.2M
3:24:13
Rank: #13919 (+14)
40K → 25.2M
3:14 | 9:23/mi
Finish· 26.22 mi
3:32:35
Rank: #13916 (+3)
25.2M → Finish
8:22 | 8:13/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:41:30
Pace7:45 /mi
2nd Half
Distance13.11 mi
Time1:51:05
Pace8:28 /mi
📊Positive Split: 9.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:49:5823:357:3523:35
7:35
-
10K
6.21 mi11:13:4947:267:3823:51
7:41
+0:06
15K
9.32 mi11:38:051:11:427:4224:16
7:49
+0:08
20K
12.43 mi12:02:371:36:147:4524:32
7:54
+0:05
Half
13.11 mi12:07:531:41:307:455:16
7:43
-0:11
25K
15.53 mi12:27:202:00:577:4719:27
8:01
+0:18
30K
18.64 mi12:54:462:28:237:5827:26
8:50
+0:49
20M
20.00 mi13:06:102:39:477:5911:24
8:23
-0:27
21M
21.00 mi13:15:122:48:498:029:02
9:02
+0:39
35K
21.75 mi13:21:142:54:518:026:02
8:04
-0:58
23M
23.00 mi13:31:443:05:218:0410:30
8:23
+0:19
24M
24.00 mi13:40:073:13:448:048:23
8:23
0:00
40K
24.85 mi13:47:223:20:598:057:15
8:29
+0:06
25.2M
25.20 mi13:50:363:24:138:063:14
9:23
+0:54
Finish
26.22 mi13:58:583:32:358:078:22
8:13
-1:10

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

7:35 /mi

Average Pace

8:07 /mi

Slowest Pace

9:23 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:41:30

48% of race

Time at Steady Pace

1:04:08

30% of race

Time at Slower Pace

46:57

22% of race

Average Pace: 8:06 /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 mi10:49:5823:357:3523:35
7:35
#13026
10K
6.21 mi11:13:4947:267:3823:51
7:41
#13337
15K
9.32 mi11:38:051:11:427:4224:16
7:49
#13684
20K
12.43 mi12:02:371:36:147:4524:32
7:54
#13741
Half
13.11 mi12:07:531:41:307:455:16
7:43
#13730
25K
15.53 mi12:27:202:00:577:4719:27
8:01
#13772
30K
18.64 mi12:54:462:28:237:5827:26
8:50
#14362
20M
20.00 mi13:06:102:39:477:5911:24
8:23
#14225
21M
21.00 mi13:15:122:48:498:029:02
9:02
#14165
35K
21.75 mi13:21:142:54:518:026:02
8:04
#14089
23M
23.00 mi13:31:443:05:218:0410:30
8:23
#13994
24M
24.00 mi13:40:073:13:448:048:23
8:23
#13995
40K
24.85 mi13:47:223:20:598:057:15
8:29
#13933
25.2M
25.20 mi13:50:363:24:138:063:14
9:23
#13919
Finish
26.22 mi13:58:583:32:358:078:22
8:13
#13916
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi130269661966114449(Top 51%)10124(Top 63%)10124(Top 424%)
10K6.21 mi3.10 mi13337-3119750-899750-8913666(Top 48%)9867(Top 61%)9867(Top 414%)
15K9.32 mi3.11 mi13684-3479856-1069856-10614449(Top 51%)10124(Top 63%)10124(Top 424%)
20K12.43 mi3.11 mi13741-579840+169840+1614045(Top 49%)9886(Top 61%)9886(Top 414%)
Half13.11 mi0.68 mi13730+119820+209820+2013512(Top 48%)9700(Top 60%)9700(Top 407%)
25K15.53 mi2.42 mi13772-429820982014052(Top 49%)9781(Top 61%)9781(Top 410%)
30K18.64 mi3.11 mi14362-59010004-18410004-18416761(Top 59%)10816(Top 67%)10816(Top 453%)
20M20.00 mi1.36 mi14225+1379925+799925+7913063(Top 46%)9022(Top 56%)9022(Top 378%)
21M21.00 mi1.00 mi14165+609868+579868+5713695(Top 48%)9194(Top 57%)9194(Top 385%)
35K21.75 mi0.75 mi14089+769813+559813+5512677(Top 45%)8663(Top 54%)8663(Top 363%)
23M23.00 mi1.25 mi13994+959738+759738+7512579(Top 44%)8510(Top 53%)8510(Top 357%)
24M24.00 mi1.00 mi13995-19692+469692+4613748(Top 48%)9026(Top 56%)9026(Top 378%)
40K24.85 mi0.85 mi13933+629634+589634+5813284(Top 47%)8659(Top 54%)8659(Top 363%)
25.2M25.20 mi0.35 mi13919+149629+59629+513831(Top 49%)8865(Top 55%)8865(Top 372%)
Finish26.22 mi1.02 mi13916+39604+259604+2514312(Top 50%)9166(Top 57%)9166(Top 384%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 51%
×21stories
+97ft-345ft

Overall

14449

Males

10124

M45-49

10124

5K→10K

3.1 - 6.2 mi

Top 48%
×5stories
+79ft-138ft

Overall

13666

Males

9867

M45-49

9867

10K→15K

6.2 - 9.3 mi

Top 51%
×3stories
+67ft-78ft

Overall

14449

Males

10124

M45-49

10124

15K→20K

9.3 - 12.4 mi

Top 49%
×5stories
+106ft-86ft

Overall

14045

Males

9886

M45-49

9886

20K→Half

12.4 - 13.1 mi

Top 48%
×2stories
+19ft-37ft

Overall

13512

Males

9700

M45-49

9700

Half→25K

13.1 - 15.5 mi

Top 49%
×4stories
+66ft-88ft

Overall

14052

Males

9781

M45-49

9781

25K→30K

15.5 - 18.6 mi

Top 59%
×9stories
+181ft-148ft

Overall

16761

Males

10816

M45-49

10816

30K→20M

18.6 - 20.0 mi

Top 46%
×5stories
+64ft-50ft

Overall

13063

Males

9022

M45-49

9022

20M→21M

20.0 - 21.0 mi

Top 48%
×8stories
+106ft-24ft

Overall

13695

Males

9194

M45-49

9194

21M→35K

21.0 - 21.8 mi

Top 45%
×7stories
+17ft-86ft

Overall

12677

Males

8663

M45-49

8663

35K→23M

21.8 - 23.0 mi

Top 44%
×5stories
+23ft-63ft

Overall

12579

Males

8510

M45-49

8510

23M→24M

23.0 - 24.0 mi

Top 48%
×6stories
+12ft-82ft

Overall

13748

Males

9026

M45-49

9026

24M→40K

24.0 - 24.9 mi

Top 47%
×1story
+6ft-20ft

Overall

13284

Males

8659

M45-49

8659

40K→25.2M

24.9 - 25.2 mi

Top 49%
×1story
+13ft-16ft

Overall

13831

Males

8865

M45-49

8865

25.2M→Finish

25.2 - 26.2 mi

Top 50%
×2stories
+22ft-21ft

Overall

14312

Males

9166

M45-49

9166

Passing Analysis

Category:
Athletes Passed
1699
Passed By
2589
Net Change
-890
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#13026
5K → 10K169480-311#13026#13337
10K → 15K111458-347#13337#13684
15K → 20K188245-57#13684#13741
20K → Half4231+11#13741#13730
Half → 25K163205-42#13730#13772
25K → 30K115705-590#13772#14362
30K → 20M17942+137#14362#14225
20M → 21M14989+60#14225#14165
21M → 35K10529+76#14165#14089
35K → 23M16065+95#14089#13994
23M → 24M9091-1#13994#13995
24M → 40K10947+62#13995#13933
40K → 25.2M4329+14#13933#13919
25.2M → Finish7673+3#13919#13916
TOTALS16992589-890
📊

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