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BOSTON MARATHON 2025

Marc Jansen

Bib: 28709•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
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
27:08
Rank: #21152
Start → 5K
27:08 | 8:44/mi
10K· 6.21 mi
54:11
Rank: #20996 (+156)
5K → 10K
27:03 | 8:42/mi
15K· 9.32 mi
1:21:09
Rank: #20781 (+215)
10K → 15K
26:58 | 8:41/mi
20K· 12.43 mi
1:48:22
Rank: #20524 (+257)
15K → 20K
27:13 | 8:46/mi
Half· 13.11 mi
1:54:18
Rank: #20516 (+8)
20K → Half
5:56 | 8:42/mi
25K· 15.53 mi
2:15:49
Rank: #20313 (+203)
Half → 25K
21:31 | 8:52/mi
30K· 18.64 mi
2:44:27
Rank: #19990 (+323)
25K → 30K
28:38 | 9:13/mi
20M
2:57:13
Rank: #19886 (+104)
30K → 20M
12:46 | 9:24/mi
21M
3:07:19
Rank: #19806 (+80)
20M → 21M
10:06 | 10:06/mi
35K· 21.75 mi
3:13:52
Rank: #19703 (+103)
21M → 35K
6:33 | 8:45/mi
23M
3:25:22
Rank: #19557 (+146)
35K → 23M
11:30 | 9:11/mi
24M
3:34:27
Rank: #19483 (+74)
23M → 24M
9:05 | 9:05/mi
40K· 24.85 mi
3:42:47
Rank: #19483
24M → 40K
8:20 | 9:45/mi
25.2M
3:46:28
Rank: #19481 (+2)
40K → 25.2M
3:41 | 10:41/mi
Finish· 26.22 mi
3:55:17
Rank: #19396 (+85)
25.2M → Finish
8:49 | 8:39/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:54:18
Pace8:43 /mi
2nd Half
Distance13.11 mi
Time2:00:59
Pace9:14 /mi
📊Positive Split: 5.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:45:4127:088:4427:08
8:44
-
10K
6.21 mi12:12:4454:118:4327:03
8:42
-0:02
15K
9.32 mi12:39:421:21:098:4226:58
8:41
-0:01
20K
12.43 mi13:06:551:48:228:4327:13
8:46
+0:05
Half
13.11 mi13:12:511:54:188:435:56
8:42
-0:04
25K
15.53 mi13:34:222:15:498:4521:31
8:52
+0:10
30K
18.64 mi14:03:002:44:278:4928:38
9:13
+0:21
20M
20.00 mi14:15:462:57:138:5212:46
9:24
+0:11
21M
21.00 mi14:25:523:07:198:5510:06
10:06
+0:42
35K
21.75 mi14:32:253:13:528:556:33
8:45
-1:21
23M
23.00 mi14:43:553:25:228:5611:30
9:11
+0:26
24M
24.00 mi14:53:003:34:278:569:05
9:05
-0:06
40K
24.85 mi15:01:203:42:478:588:20
9:45
+0:40
25.2M
25.20 mi15:05:013:46:288:593:41
10:41
+0:56
Finish
26.22 mi15:13:503:55:178:598:49
8:39
-2:02

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

8:39 /mi

Average Pace

8:59 /mi

Slowest Pace

10:41 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

0:00

0% of race

Time at Steady Pace

2:40:16

68% of race

Time at Slower Pace

1:15:01

32% of race

Average Pace: 8:58 /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 mi11:45:4127:088:4427:08
8:44
#21152
10K
6.21 mi12:12:4454:118:4327:03
8:42
#20996
15K
9.32 mi12:39:421:21:098:4226:58
8:41
#20781
20K
12.43 mi13:06:551:48:228:4327:13
8:46
#20524
Half
13.11 mi13:12:511:54:188:435:56
8:42
#20516
25K
15.53 mi13:34:222:15:498:4521:31
8:52
#20313
30K
18.64 mi14:03:002:44:278:4928:38
9:13
#19990
20M
20.00 mi14:15:462:57:138:5212:46
9:24
#19886
21M
21.00 mi14:25:523:07:198:5510:06
10:06
#19806
35K
21.75 mi14:32:253:13:528:556:33
8:45
#19703
23M
23.00 mi14:43:553:25:228:5611:30
9:11
#19557
24M
24.00 mi14:53:003:34:278:569:05
9:05
#19483
40K
24.85 mi15:01:203:42:478:588:20
9:45
#19483
25.2M
25.20 mi15:05:013:46:288:593:41
10:41
#19481
Finish
26.22 mi15:13:503:55:178:598:49
8:39
#19396
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi21152129271292720355(Top 72%)12670(Top 79%)12670(Top 531%)
10K6.21 mi3.10 mi20996+15612886+4112886+4120894(Top 74%)12873(Top 80%)12873(Top 540%)
15K9.32 mi3.11 mi20781+21512810+7612810+7620355(Top 72%)12670(Top 79%)12670(Top 531%)
20K12.43 mi3.11 mi20524+25712691+11912691+11919731(Top 69%)12343(Top 77%)12343(Top 517%)
Half13.11 mi0.68 mi20516+812690+112690+120293(Top 71%)12585(Top 78%)12585(Top 527%)
25K15.53 mi2.42 mi20313+20312591+9912591+9919294(Top 68%)12100(Top 75%)12100(Top 507%)
30K18.64 mi3.11 mi19990+32312415+17612415+17618707(Top 66%)11702(Top 73%)11702(Top 490%)
20M20.00 mi1.36 mi19886+10412348+6712348+6718716(Top 66%)11554(Top 72%)11554(Top 484%)
21M21.00 mi1.00 mi19806+8012289+5912289+5918658(Top 66%)11450(Top 71%)11450(Top 480%)
35K21.75 mi0.75 mi19703+10312231+5812231+5817009(Top 60%)10624(Top 66%)10624(Top 445%)
23M23.00 mi1.25 mi19557+14612134+9712134+9717253(Top 61%)10632(Top 66%)10632(Top 446%)
24M24.00 mi1.00 mi19483+7412078+5612078+5617784(Top 63%)10826(Top 67%)10826(Top 454%)
40K24.85 mi0.85 mi1948312061+1712061+1719619(Top 69%)11618(Top 72%)11618(Top 487%)
25.2M25.20 mi0.35 mi19481+212052+912052+919626(Top 69%)11609(Top 72%)11609(Top 487%)
Finish26.22 mi1.02 mi19396+8511993+5911993+5917175(Top 60%)10485(Top 65%)10485(Top 439%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 72%
×21stories
+97ft-345ft

Overall

20355

Males

12670

M45-49

12670

5K→10K

3.1 - 6.2 mi

Top 74%
×5stories
+79ft-138ft

Overall

20894

Males

12873

M45-49

12873

10K→15K

6.2 - 9.3 mi

Top 72%
×3stories
+67ft-78ft

Overall

20355

Males

12670

M45-49

12670

15K→20K

9.3 - 12.4 mi

Top 69%
×5stories
+106ft-86ft

Overall

19731

Males

12343

M45-49

12343

20K→Half

12.4 - 13.1 mi

Top 71%
×2stories
+19ft-37ft

Overall

20293

Males

12585

M45-49

12585

Half→25K

13.1 - 15.5 mi

Top 68%
×4stories
+66ft-88ft

Overall

19294

Males

12100

M45-49

12100

25K→30K

15.5 - 18.6 mi

Top 66%
×9stories
+181ft-148ft

Overall

18707

Males

11702

M45-49

11702

30K→20M

18.6 - 20.0 mi

Top 66%
×5stories
+64ft-50ft

Overall

18716

Males

11554

M45-49

11554

20M→21M

20.0 - 21.0 mi

Top 66%
×8stories
+106ft-24ft

Overall

18658

Males

11450

M45-49

11450

21M→35K

21.0 - 21.8 mi

Top 60%
×7stories
+17ft-86ft

Overall

17009

Males

10624

M45-49

10624

35K→23M

21.8 - 23.0 mi

Top 61%
×5stories
+23ft-63ft

Overall

17253

Males

10632

M45-49

10632

23M→24M

23.0 - 24.0 mi

Top 63%
×6stories
+12ft-82ft

Overall

17784

Males

10826

M45-49

10826

24M→40K

24.0 - 24.9 mi

Top 69%
×1story
+6ft-20ft

Overall

19619

Males

11618

M45-49

11618

40K→25.2M

24.9 - 25.2 mi

Top 69%
×1story
+13ft-16ft

Overall

19626

Males

11609

M45-49

11609

25.2M→Finish

25.2 - 26.2 mi

Top 60%
×2stories
+22ft-21ft

Overall

17175

Males

10485

M45-49

10485

Passing Analysis

Category:
Athletes Passed
2564
Passed By
808
Net Change
+1756
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#21152
5K → 10K368212+156#21152#20996
10K → 15K30893+215#20996#20781
15K → 20K32063+257#20781#20524
20K → Half4133+8#20524#20516
Half → 25K25552+203#20516#20313
25K → 30K40077+323#20313#19990
30K → 20M16157+104#19990#19886
20M → 21M13353+80#19886#19806
21M → 35K1096+103#19806#19703
35K → 23M17125+146#19703#19557
23M → 24M10026+74#19557#19483
24M → 40K65650#19483#19483
40K → 25.2M2927+2#19483#19481
25.2M → Finish10419+85#19481#19396
TOTALS2564808+1756
📊

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