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BOSTON MARATHON 2025

Pieter Zwinkels

Bib: 28710•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M40-44)
#0 / 2247
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
27:07
Rank: #21131
Start → 5K
8:44/mi
27:07 split
10K· 6.21 mi
54:11
Rank: #20997 (+134)
5K → 10K
8:43/mi
27:04 split
15K· 9.32 mi
1:21:08
Rank: #20770 (+227)
10K → 15K
8:40/mi
26:57 split
20K· 12.43 mi
1:48:22
Rank: #20526 (+244)
15K → 20K
8:46/mi
27:14 split
Half· 13.11 mi
1:54:18
Rank: #20518 (+8)
20K → Half
8:42/mi
5:56 split
25K· 15.53 mi
2:15:49
Rank: #20314 (+204)
Half → 25K
8:52/mi
21:31 split
30K· 18.64 mi
2:45:37
Rank: #20305 (+9)
25K → 30K
9:36/mi
29:48 split
20M
2:58:56
Rank: #20312 (-7)
30K → 20M
9:48/mi
13:19 split
21M
3:09:51
Rank: #20389 (-77)
20M → 21M
10:55/mi
10:55 split
35K· 21.75 mi
3:17:00
Rank: #20390 (-1)
21M → 35K
9:33/mi
7:09 split
23M
3:29:37
Rank: #20440 (-50)
35K → 23M
10:05/mi
12:37 split
24M
3:39:24
Rank: #20475 (-35)
23M → 24M
9:47/mi
9:47 split
40K· 24.85 mi
3:47:37
Rank: #20441 (+34)
24M → 40K
9:37/mi
8:13 split
25.2M
3:52:11
Rank: #20591 (-150)
40K → 25.2M
13:15/mi
4:34 split
Finish· 26.22 mi
4:02:06
Rank: #20646 (-55)
25.2M → Finish
9:44/mi
9:55 split

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
Time2:07:48
Pace9:45 /mi
📊Positive Split: 11.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:45:4127:078:4427:07
8:44
-
10K
6.21 mi12:12:4554:118:4327:04
8:43
-0:01
15K
9.32 mi12:39:421:21:088:4226:57
8:40
-0:03
20K
12.43 mi13:06:561:48:228:4327:14
8:46
+0:06
Half
13.11 mi13:12:521:54:188:435:56
8:42
-0:04
25K
15.53 mi13:34:232:15:498:4521:31
8:52
+0:10
30K
18.64 mi14:04:112:45:378:5329:48
9:36
+0:44
20M
20.00 mi14:17:302:58:568:5713:19
9:48
+0:12
21M
21.00 mi14:28:253:09:519:0210:55
10:55
+1:07
35K
21.75 mi14:35:343:17:009:037:09
9:33
-1:22
23M
23.00 mi14:48:113:29:379:0712:37
10:05
+0:32
24M
24.00 mi14:57:583:39:249:099:47
9:47
-0:18
40K
24.85 mi15:06:113:47:379:098:13
9:37
-0:10
25.2M
25.20 mi15:10:453:52:119:134:34
13:15
+3:38
Finish
26.22 mi15:20:404:02:069:149:55
9:44
-3:31

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

8:40 /mi

Average Pace

9:14 /mi

Slowest Pace

13:15 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:15:49

56% of race

Time at Steady Pace

1:30:48

38% of race

Time at Slower Pace

15:29

6% of race

Average Pace: 9:14 /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 mi11:45:4127:078:4427:07
8:44
#21131
10K
6.21 mi12:12:4554:118:4327:04
8:43
#20997
15K
9.32 mi12:39:421:21:088:4226:57
8:40
#20770
20K
12.43 mi13:06:561:48:228:4327:14
8:46
#20526
Half
13.11 mi13:12:521:54:188:435:56
8:42
#20518
25K
15.53 mi13:34:232:15:498:4521:31
8:52
#20314
30K
18.64 mi14:04:112:45:378:5329:48
9:36
#20305
20M
20.00 mi14:17:302:58:568:5713:19
9:48
#20312
21M
21.00 mi14:28:253:09:519:0210:55
10:55
#20389
35K
21.75 mi14:35:343:17:009:037:09
9:33
#20390
23M
23.00 mi14:48:113:29:379:0712:37
10:05
#20440
24M
24.00 mi14:57:583:39:249:099:47
9:47
#20475
40K
24.85 mi15:06:113:47:379:098:13
9:37
#20441
25.2M
25.20 mi15:10:453:52:119:134:34
13:15
#20591
Finish
26.22 mi15:20:404:02:069:149:55
9:44
#20646
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi21131129201292020321(Top 72%)12657(Top 79%)12657(Top 563%)
10K6.21 mi3.10 mi20997+13412887+3312887+3320937(Top 74%)12892(Top 80%)12892(Top 574%)
15K9.32 mi3.11 mi20770+22712805+8212805+8220321(Top 72%)12657(Top 79%)12657(Top 563%)
20K12.43 mi3.11 mi20526+24412693+11212693+11219765(Top 70%)12361(Top 77%)12361(Top 550%)
Half13.11 mi0.68 mi20518+812692+112692+120311(Top 72%)12603(Top 78%)12603(Top 561%)
25K15.53 mi2.42 mi20314+20412592+10012592+10019299(Top 68%)12105(Top 75%)12105(Top 539%)
30K18.64 mi3.11 mi20305+912547+4512547+4520314(Top 72%)12434(Top 77%)12434(Top 553%)
20M20.00 mi1.36 mi20312-712524+2312524+2320293(Top 71%)12280(Top 76%)12280(Top 547%)
21M21.00 mi1.00 mi20389-7712545-2112545-2121159(Top 74%)12574(Top 78%)12574(Top 560%)
35K21.75 mi0.75 mi20390-112529+1612529+1620511(Top 72%)12215(Top 76%)12215(Top 544%)
23M23.00 mi1.25 mi20440-50125291252920725(Top 73%)12258(Top 76%)12258(Top 546%)
24M24.00 mi1.00 mi20475-3512533-412533-420665(Top 73%)12186(Top 76%)12186(Top 542%)
40K24.85 mi0.85 mi20441+3412496+3712496+3719123(Top 67%)11384(Top 71%)11384(Top 507%)
25.2M25.20 mi0.35 mi20591-15012551-5512551-5525342(Top 89%)14408(Top 89%)14408(Top 641%)
Finish26.22 mi1.02 mi20646-5512565-1412565-1422011(Top 77%)12792(Top 79%)12792(Top 569%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 72%
×21story building
+97ft-345ft

Overall

20321

Males

12657

M40-44

12657

5K→10K

3.1 - 6.2 mi

Top 74%
×5story building
+79ft-138ft

Overall

20937

Males

12892

M40-44

12892

10K→15K

6.2 - 9.3 mi

Top 72%
×3story building
+67ft-78ft

Overall

20321

Males

12657

M40-44

12657

15K→20K

9.3 - 12.4 mi

Top 70%
×5story building
+106ft-86ft

Overall

19765

Males

12361

M40-44

12361

20K→Half

12.4 - 13.1 mi

Top 72%
×2story building
+19ft-37ft

Overall

20311

Males

12603

M40-44

12603

Half→25K

13.1 - 15.5 mi

Top 68%
×4story building
+66ft-88ft

Overall

19299

Males

12105

M40-44

12105

25K→30K

15.5 - 18.6 mi

Top 72%
×9story building
+181ft-148ft

Overall

20314

Males

12434

M40-44

12434

30K→20M

18.6 - 20.0 mi

Top 71%
×5story building
+64ft-50ft

Overall

20293

Males

12280

M40-44

12280

20M→21M

20.0 - 21.0 mi

Top 74%
×8story building
+106ft-24ft

Overall

21159

Males

12574

M40-44

12574

21M→35K

21.0 - 21.8 mi

Top 72%
×7story building
+17ft-86ft

Overall

20511

Males

12215

M40-44

12215

35K→23M

21.8 - 23.0 mi

Top 73%
×5story building
+23ft-63ft

Overall

20725

Males

12258

M40-44

12258

23M→24M

23.0 - 24.0 mi

Top 73%
×6story building
+12ft-82ft

Overall

20665

Males

12186

M40-44

12186

24M→40K

24.0 - 24.9 mi

Top 67%
×1story
+6ft-20ft

Overall

19123

Males

11384

M40-44

11384

40K→25.2M

24.9 - 25.2 mi

Top 89%
×1story
+13ft-16ft

Overall

25342

Males

14408

M40-44

14408

25.2M→Finish

25.2 - 26.2 mi

Top 77%
×2story building
+22ft-21ft

Overall

22011

Males

12792

M40-44

12792

Passing Analysis

Category:
Athletes Passed
1954
Passed By
1469
Net Change
+485
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#21131
5K → 10K354220+134#21131#20997
10K → 15K31487+227#20997#20770
15K → 20K31571+244#20770#20526
20K → Half4133+8#20526#20518
Half → 25K25551+204#20518#20314
25K → 30K234225+9#20314#20305
30K → 20M99106-7#20305#20312
20M → 21M63140-77#20312#20389
21M → 35K5859-1#20389#20390
35K → 23M74124-50#20390#20440
23M → 24M4378-35#20440#20475
24M → 40K7541+34#20475#20441
40K → 25.2M5155-150#20441#20591
25.2M → Finish2479-55#20591#20646
TOTALS19541469+485
📊

Passing Visuals

Category:
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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