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BOSTON MARATHON 2025

Koen Willems

Bib: 5688•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 16%
Gender (Male)
#0 / 16105
Top 26%
Masters (Masters Men)
#0 / 10463
Top 12%
Division (M45-49)
#0 / 2386
Top 15%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
19:35
Rank: #2470
Start → 5K
19:35 | 6:18/mi
10K· 6.21 mi
39:36
Rank: #2875 (-405)
5K → 10K
20:01 | 6:27/mi
15K· 9.32 mi
59:51
Rank: #3152 (-277)
10K → 15K
20:15 | 6:31/mi
20K· 12.43 mi
1:20:28
Rank: #3329 (-177)
15K → 20K
20:37 | 6:38/mi
Half· 13.11 mi
1:24:57
Rank: #3378 (-49)
20K → Half
4:29 | 6:34/mi
25K· 15.53 mi
1:41:10
Rank: #3465 (-87)
Half → 25K
16:13 | 6:41/mi
30K· 18.64 mi
2:03:18
Rank: #3736 (-271)
25K → 30K
22:08 | 7:07/mi
20M
2:13:15
Rank: #3858 (-122)
30K → 20M
9:57 | 7:19/mi
21M
2:22:24
Rank: #4454 (-596)
20M → 21M
9:09 | 9:09/mi
35K· 21.75 mi
2:27:36
Rank: #4456 (-2)
21M → 35K
5:12 | 6:57/mi
23M
2:36:36
Rank: #4449 (+7)
35K → 23M
9:00 | 7:11/mi
24M
2:43:36
Rank: #4446 (+3)
23M → 24M
7:00 | 7:00/mi
40K· 24.85 mi
2:49:47
Rank: #4467 (-21)
24M → 40K
6:11 | 7:14/mi
25.2M
2:52:29
Rank: #4475 (-8)
40K → 25.2M
2:42 | 7:50/mi
Finish· 26.22 mi
2:59:35
Rank: #4556 (-81)
25.2M → Finish
7:06 | 6:58/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:24:57
Pace6:29 /mi
2nd Half
Distance13.11 mi
Time1:34:38
Pace7:13 /mi
📊Positive Split: 11.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:24:1619:356:1819:35
6:18
-
10K
6.21 mi10:44:1739:366:2220:01
6:27
+0:09
15K
9.32 mi11:04:3259:516:2520:15
6:31
+0:04
20K
12.43 mi11:25:091:20:286:2820:37
6:38
+0:07
Half
13.11 mi11:29:381:24:576:294:29
6:34
-0:04
25K
15.53 mi11:45:511:41:106:3116:13
6:41
+0:07
30K
18.64 mi12:07:592:03:186:3722:08
7:07
+0:26
20M
20.00 mi12:17:562:13:156:409:57
7:19
+0:12
21M
21.00 mi12:27:052:22:246:479:09
9:09
+1:50
35K
21.75 mi12:32:172:27:366:475:12
6:57
-2:12
23M
23.00 mi12:41:172:36:366:499:00
7:11
+0:14
24M
24.00 mi12:48:172:43:366:497:00
7:00
-0:11
40K
24.85 mi12:54:282:49:476:506:11
7:14
+0:14
25.2M
25.20 mi12:57:102:52:296:512:42
7:50
+0:36
Finish
26.22 mi13:04:162:59:356:517:06
6:58
-0:52

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

6:18 /mi

Average Pace

6:51 /mi

Slowest Pace

9:09 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:04:20

36% of race

Time at Steady Pace

1:33:27

52% of race

Time at Slower Pace

21:48

12% of race

Average Pace: 6:51 /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 mi10:24:1619:356:1819:35
6:18
#2470
10K
6.21 mi10:44:1739:366:2220:01
6:27
#2875
15K
9.32 mi11:04:3259:516:2520:15
6:31
#3152
20K
12.43 mi11:25:091:20:286:2820:37
6:38
#3329
Half
13.11 mi11:29:381:24:576:294:29
6:34
#3378
25K
15.53 mi11:45:511:41:106:3116:13
6:41
#3465
30K
18.64 mi12:07:592:03:186:3722:08
7:07
#3736
20M
20.00 mi12:17:562:13:156:409:57
7:19
#3858
21M
21.00 mi12:27:052:22:246:479:09
9:09
#4454
35K
21.75 mi12:32:172:27:366:475:12
6:57
#4456
23M
23.00 mi12:41:172:36:366:499:00
7:11
#4449
24M
24.00 mi12:48:172:43:366:497:00
7:00
#4446
40K
24.85 mi12:54:282:49:476:506:11
7:14
#4467
25.2M
25.20 mi12:57:102:52:296:512:42
7:50
#4475
Finish
26.22 mi13:04:162:59:356:517:06
6:58
#4556
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi2470235323533684(Top 13%)3479(Top 22%)3479(Top 146%)
10K6.21 mi3.10 mi2875-4052739-3862739-3863336(Top 12%)3171(Top 20%)3171(Top 133%)
15K9.32 mi3.11 mi3152-2773001-2623001-2623684(Top 13%)3479(Top 22%)3479(Top 146%)
20K12.43 mi3.11 mi3329-1773167-1663167-1663937(Top 14%)3708(Top 23%)3708(Top 155%)
Half13.11 mi0.68 mi3378-493208-413208-414221(Top 15%)3960(Top 25%)3960(Top 166%)
25K15.53 mi2.42 mi3465-873286-783286-784061(Top 14%)3785(Top 24%)3785(Top 159%)
30K18.64 mi3.11 mi3736-2713525-2393525-2395451(Top 19%)4898(Top 30%)4898(Top 205%)
20M20.00 mi1.36 mi3858-1223628-1033628-1035924(Top 21%)5147(Top 32%)5147(Top 216%)
21M21.00 mi1.00 mi4454-5964134-5064134-50614314(Top 50%)9469(Top 59%)9469(Top 397%)
35K21.75 mi0.75 mi4456-24131+34131+35067(Top 18%)4434(Top 28%)4434(Top 186%)
23M23.00 mi1.25 mi4449+74116+154116+154805(Top 17%)4181(Top 26%)4181(Top 175%)
24M24.00 mi1.00 mi4446+34102+144102+144638(Top 16%)4009(Top 25%)4009(Top 168%)
40K24.85 mi0.85 mi4467-214111-94111-95223(Top 18%)4364(Top 27%)4364(Top 183%)
25.2M25.20 mi0.35 mi4475-8411141115031(Top 18%)4148(Top 26%)4148(Top 174%)
Finish26.22 mi1.02 mi4556-814177-664177-665506(Top 19%)4430(Top 28%)4430(Top 186%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 13%
×21stories
+97ft-345ft

Overall

3684

Males

3479

M45-49

3479

5K→10K

3.1 - 6.2 mi

Top 12%
×5stories
+79ft-138ft

Overall

3336

Males

3171

M45-49

3171

10K→15K

6.2 - 9.3 mi

Top 13%
×3stories
+67ft-78ft

Overall

3684

Males

3479

M45-49

3479

15K→20K

9.3 - 12.4 mi

Top 14%
×5stories
+106ft-86ft

Overall

3937

Males

3708

M45-49

3708

20K→Half

12.4 - 13.1 mi

Top 15%
×2stories
+19ft-37ft

Overall

4221

Males

3960

M45-49

3960

Half→25K

13.1 - 15.5 mi

Top 14%
×4stories
+66ft-88ft

Overall

4061

Males

3785

M45-49

3785

25K→30K

15.5 - 18.6 mi

Top 19%
×9stories
+181ft-148ft

Overall

5451

Males

4898

M45-49

4898

30K→20M

18.6 - 20.0 mi

Top 21%
×5stories
+64ft-50ft

Overall

5924

Males

5147

M45-49

5147

20M→21M

20.0 - 21.0 mi

Top 50%
×8stories
+106ft-24ft

Overall

14314

Males

9469

M45-49

9469

21M→35K

21.0 - 21.8 mi

Top 18%
×7stories
+17ft-86ft

Overall

5067

Males

4434

M45-49

4434

35K→23M

21.8 - 23.0 mi

Top 17%
×5stories
+23ft-63ft

Overall

4805

Males

4181

M45-49

4181

23M→24M

23.0 - 24.0 mi

Top 16%
×6stories
+12ft-82ft

Overall

4638

Males

4009

M45-49

4009

24M→40K

24.0 - 24.9 mi

Top 18%
×1story
+6ft-20ft

Overall

5223

Males

4364

M45-49

4364

40K→25.2M

24.9 - 25.2 mi

Top 18%
×1story
+13ft-16ft

Overall

5031

Males

4148

M45-49

4148

25.2M→Finish

25.2 - 26.2 mi

Top 19%
×2stories
+22ft-21ft

Overall

5506

Males

4430

M45-49

4430

Passing Analysis

Category:
Athletes Passed
488
Passed By
2574
Net Change
-2086
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#2470
5K → 10K23428-405#2470#2875
10K → 15K22299-277#2875#3152
15K → 20K48225-177#3152#3329
20K → Half554-49#3329#3378
Half → 25K46133-87#3378#3465
25K → 30K48319-271#3465#3736
30K → 20M32154-122#3736#3858
20M → 21M8604-596#3858#4454
21M → 35K4446-2#4454#4456
35K → 23M7164+7#4456#4449
23M → 24M5249+3#4449#4446
24M → 40K4465-21#4446#4467
40K → 25.2M2129-8#4467#4475
25.2M → Finish24105-81#4475#4556
TOTALS4882574-2086
📊

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