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BOSTON MARATHON 2025

Harmen Den Boer

Bib: 1331•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 3%
Gender (Male)
#0 / 16105
Top 4%
Masters (Masters Men)
#0 / 10463
Top 0.9%
Division (M45-49)
#0 / 2386
Top 0.8%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
18:34
Rank: #1001
Start → 5K
18:34 | 5:59/mi
10K· 6.21 mi
37:24
Rank: #1125 (-124)
5K → 10K
18:50 | 6:04/mi
15K· 9.32 mi
56:22
Rank: #1197 (-72)
10K → 15K
18:58 | 6:06/mi
20K· 12.43 mi
1:15:20
Rank: #1176 (+21)
15K → 20K
18:58 | 6:06/mi
Half· 13.11 mi
1:19:24
Rank: #1164 (+12)
20K → Half
4:04 | 5:58/mi
25K· 15.53 mi
1:34:04
Rank: #1108 (+56)
Half → 25K
14:40 | 6:03/mi
30K· 18.64 mi
1:53:02
Rank: #1008 (+100)
25K → 30K
18:58 | 6:06/mi
20M
2:01:24
Rank: #943 (+65)
30K → 20M
8:22 | 6:09/mi
21M
2:07:50
Rank: #895 (+48)
20M → 21M
6:26 | 6:26/mi
35K· 21.75 mi
2:12:25
Rank: #887 (+8)
21M → 35K
4:35 | 6:08/mi
23M
2:20:11
Rank: #859 (+28)
35K → 23M
7:46 | 6:12/mi
24M
2:26:09
Rank: #830 (+29)
23M → 24M
5:58 | 5:58/mi
40K· 24.85 mi
2:31:21
Rank: #799 (+31)
24M → 40K
5:12 | 6:05/mi
25.2M
2:33:38
Rank: #790 (+9)
40K → 25.2M
2:17 | 6:37/mi
Finish· 26.22 mi
2:39:31
Rank: #762 (+28)
25.2M → Finish
5:53 | 5:46/mi

The Course

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Half Splits

1st Half· via Half⚖️ Balanced
Distance13.11 mi
Time1:19:24
Pace6:03 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:20:07
Pace6:07 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:19:1518:345:5918:34
5:59
-
10K
6.21 mi10:38:0537:246:0118:50
6:04
+0:05
15K
9.32 mi10:57:0356:226:0318:58
6:06
+0:02
20K
12.43 mi11:16:011:15:206:0418:58
6:06
0:00
Half
13.11 mi11:20:051:19:246:034:04
5:58
-0:08
25K
15.53 mi11:34:451:34:046:0314:40
6:03
+0:05
30K
18.64 mi11:53:431:53:026:0418:58
6:06
+0:03
20M
20.00 mi12:02:052:01:246:048:22
6:09
+0:03
21M
21.00 mi12:08:312:07:506:056:26
6:26
+0:17
35K
21.75 mi12:13:062:12:256:054:35
6:08
-0:18
23M
23.00 mi12:20:522:20:116:067:46
6:12
+0:04
24M
24.00 mi12:26:502:26:096:055:58
5:58
-0:14
40K
24.85 mi12:32:022:31:216:055:12
6:05
+0:07
25.2M
25.20 mi12:34:192:33:386:062:17
6:37
+0:32
Finish
26.22 mi12:40:122:39:316:055:53
5:46
-0:51

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

5:46 /mi

Average Pace

6:05 /mi

Slowest Pace

6:37 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:30:48

95% of race

Time at Steady Pace

8:43

5% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:05 /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 mi10:19:1518:345:5918:34
5:59
#1001
10K
6.21 mi10:38:0537:246:0118:50
6:04
#1125
15K
9.32 mi10:57:0356:226:0318:58
6:06
#1197
20K
12.43 mi11:16:011:15:206:0418:58
6:06
#1176
Half
13.11 mi11:20:051:19:246:034:04
5:58
#1164
25K
15.53 mi11:34:451:34:046:0314:40
6:03
#1108
30K
18.64 mi11:53:431:53:026:0418:58
6:06
#1008
20M
20.00 mi12:02:052:01:246:048:22
6:09
#943
21M
21.00 mi12:08:312:07:506:056:26
6:26
#895
35K
21.75 mi12:13:062:12:256:054:35
6:08
#887
23M
23.00 mi12:20:522:20:116:067:46
6:12
#859
24M
24.00 mi12:26:502:26:096:055:58
5:58
#830
40K
24.85 mi12:32:022:31:216:055:12
6:05
#799
25.2M
25.20 mi12:34:192:33:386:062:17
6:37
#790
Finish
26.22 mi12:40:122:39:316:055:53
5:46
#762
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi10019429421390(Top 5%)1322(Top 8%)1322(Top 55%)
10K6.21 mi3.10 mi1125-1241062-1201062-1201322(Top 5%)1253(Top 8%)1253(Top 53%)
15K9.32 mi3.11 mi1197-721134-721134-721390(Top 5%)1322(Top 8%)1322(Top 55%)
20K12.43 mi3.11 mi1176+211115+191115+191180(Top 4%)1115(Top 7%)1115(Top 47%)
Half13.11 mi0.68 mi1164+121103+121103+12992(Top 3%)939(Top 6%)939(Top 39%)
25K15.53 mi2.42 mi1108+561047+561047+56921(Top 3%)867(Top 5%)867(Top 36%)
30K18.64 mi3.11 mi1008+100949+98949+98694(Top 2%)650(Top 4%)650(Top 27%)
20M20.00 mi1.36 mi943+65887+62887+62629(Top 2%)589(Top 4%)589(Top 25%)
21M21.00 mi1.00 mi895+48842+45842+45562(Top 2%)530(Top 3%)530(Top 22%)
35K21.75 mi0.75 mi887+8833+9833+9998(Top 4%)939(Top 6%)939(Top 39%)
23M23.00 mi1.25 mi859+28806+27806+27677(Top 2%)638(Top 4%)638(Top 27%)
24M24.00 mi1.00 mi830+29777+29777+29514(Top 2%)478(Top 3%)478(Top 20%)
40K24.85 mi0.85 mi799+31747+30747+30510(Top 2%)476(Top 3%)476(Top 20%)
25.2M25.20 mi0.35 mi790+9738+9738+9624(Top 2%)579(Top 4%)579(Top 24%)
Finish26.22 mi1.02 mi762+28711+27711+27472(Top 2%)443(Top 3%)443(Top 19%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 5%
×21stories
+97ft-345ft

Overall

1390

Males

1322

M45-49

1322

5K→10K

3.1 - 6.2 mi

Top 5%
×5stories
+79ft-138ft

Overall

1322

Males

1253

M45-49

1253

10K→15K

6.2 - 9.3 mi

Top 5%
×3stories
+67ft-78ft

Overall

1390

Males

1322

M45-49

1322

15K→20K

9.3 - 12.4 mi

Top 4%
×5stories
+106ft-86ft

Overall

1180

Males

1115

M45-49

1115

20K→Half

12.4 - 13.1 mi

Top 3%
×2stories
+19ft-37ft

Overall

992

Males

939

M45-49

939

Half→25K

13.1 - 15.5 mi

Top 3%
×4stories
+66ft-88ft

Overall

921

Males

867

M45-49

867

25K→30K

15.5 - 18.6 mi

Top 2%
×9stories
+181ft-148ft

Overall

694

Males

650

M45-49

650

30K→20M

18.6 - 20.0 mi

Top 2%
×5stories
+64ft-50ft

Overall

629

Males

589

M45-49

589

20M→21M

20.0 - 21.0 mi

Top 2%
×8stories
+106ft-24ft

Overall

562

Males

530

M45-49

530

21M→35K

21.0 - 21.8 mi

Top 4%
×7stories
+17ft-86ft

Overall

998

Males

939

M45-49

939

35K→23M

21.8 - 23.0 mi

Top 2%
×5stories
+23ft-63ft

Overall

677

Males

638

M45-49

638

23M→24M

23.0 - 24.0 mi

Top 2%
×6stories
+12ft-82ft

Overall

514

Males

478

M45-49

478

24M→40K

24.0 - 24.9 mi

Top 2%
×1story
+6ft-20ft

Overall

510

Males

476

M45-49

476

40K→25.2M

24.9 - 25.2 mi

Top 2%
×1story
+13ft-16ft

Overall

624

Males

579

M45-49

579

25.2M→Finish

25.2 - 26.2 mi

Top 2%
×2stories
+22ft-21ft

Overall

472

Males

443

M45-49

443

Passing Analysis

Category:
Athletes Passed
541
Passed By
302
Net Change
+239
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#1001
5K → 10K18142-124#1001#1125
10K → 15K1587-72#1125#1197
15K → 20K4726+21#1197#1176
20K → Half186+12#1176#1164
Half → 25K626+56#1164#1108
25K → 30K11010+100#1108#1008
30K → 20M661+65#1008#943
20M → 21M491+48#943#895
21M → 35K1911+8#895#887
35K → 23M357+28#887#859
23M → 24M312+29#859#830
24M → 40K321+31#830#799
40K → 25.2M101+9#799#790
25.2M → Finish291+28#790#762
TOTALS541302+239
📊

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