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BOSTON MARATHON 2025

Marcin Iskra

Bib: 31366•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
28:36
Rank: #23247
Start → 5K
28:36 | 9:12/mi
10K· 6.21 mi
57:23
Rank: #23329 (-82)
5K → 10K
28:47 | 9:16/mi
15K· 9.32 mi
1:26:14
Rank: #23274 (+55)
10K → 15K
28:51 | 9:17/mi
20K· 12.43 mi
1:55:24
Rank: #23088 (+186)
15K → 20K
29:10 | 9:23/mi
Half· 13.11 mi
2:01:50
Rank: #23100 (-12)
20K → Half
6:26 | 9:26/mi
25K· 15.53 mi
2:25:19
Rank: #22972 (+128)
Half → 25K
23:29 | 9:41/mi
30K· 18.64 mi
2:58:18
Rank: #22995 (-23)
25K → 30K
32:59 | 10:37/mi
20M
3:12:44
Rank: #22955 (+40)
30K → 20M
14:26 | 10:37/mi
21M
3:24:09
Rank: #22929 (+26)
20M → 21M
11:25 | 11:25/mi
35K· 21.75 mi
3:32:10
Rank: #22959 (-30)
21M → 35K
8:01 | 10:43/mi
23M
3:45:45
Rank: #22938 (+21)
35K → 23M
13:35 | 10:51/mi
24M
3:56:22
Rank: #22938
23M → 24M
10:37 | 10:37/mi
40K· 24.85 mi
4:05:49
Rank: #22955 (-17)
24M → 40K
9:27 | 11:03/mi
25.2M
4:09:50
Rank: #22959 (-4)
40K → 25.2M
4:01 | 11:39/mi
Finish· 26.22 mi
4:20:11
Rank: #22971 (-12)
25.2M → Finish
10:21 | 10:09/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:01:50
Pace9:18 /mi
2nd Half
Distance13.11 mi
Time2:18:21
Pace10:33 /mi
📊Positive Split: 13.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:53:1728:369:1228:36
9:12
-
10K
6.21 mi12:22:0457:239:1428:47
9:16
+0:04
15K
9.32 mi12:50:551:26:149:1528:51
9:17
+0:01
20K
12.43 mi13:20:051:55:249:1729:10
9:23
+0:06
Half
13.11 mi13:26:312:01:509:186:26
9:26
+0:03
25K
15.53 mi13:50:002:25:199:2123:29
9:41
+0:15
30K
18.64 mi14:22:592:58:189:3432:59
10:37
+0:56
20M
20.00 mi14:37:253:12:449:3814:26
10:37
0:00
21M
21.00 mi14:48:503:24:099:4311:25
11:25
+0:48
35K
21.75 mi14:56:513:32:109:458:01
10:43
-0:42
23M
23.00 mi15:10:263:45:459:4913:35
10:51
+0:08
24M
24.00 mi15:21:033:56:229:5110:37
10:37
-0:14
40K
24.85 mi15:30:304:05:499:539:27
11:03
+0:26
25.2M
25.20 mi15:34:314:09:509:554:01
11:39
+0:36
Finish
26.22 mi15:44:524:20:119:5610:21
10:09
-1:30

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

9:12 /mi

Average Pace

9:56 /mi

Slowest Pace

11:39 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:35:40

60% of race

Time at Steady Pace

1:19:38

31% of race

Time at Slower Pace

24:53

10% of race

Average Pace: 9:55 /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 mi11:53:1728:369:1228:36
9:12
#23247
10K
6.21 mi12:22:0457:239:1428:47
9:16
#23329
15K
9.32 mi12:50:551:26:149:1528:51
9:17
#23274
20K
12.43 mi13:20:051:55:249:1729:10
9:23
#23088
Half
13.11 mi13:26:312:01:509:186:26
9:26
#23100
25K
15.53 mi13:50:002:25:199:2123:29
9:41
#22972
30K
18.64 mi14:22:592:58:189:3432:59
10:37
#22995
20M
20.00 mi14:37:253:12:449:3814:26
10:37
#22955
21M
21.00 mi14:48:503:24:099:4311:25
11:25
#22929
35K
21.75 mi14:56:513:32:109:458:01
10:43
#22959
23M
23.00 mi15:10:263:45:459:4913:35
10:51
#22938
24M
24.00 mi15:21:033:56:229:5110:37
10:37
#22938
40K
24.85 mi15:30:304:05:499:539:27
11:03
#22955
25.2M
25.20 mi15:34:314:09:509:554:01
11:39
#22959
Finish
26.22 mi15:44:524:20:119:5610:21
10:09
#22971
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi23247138831388323165(Top 82%)13914(Top 86%)13914(Top 619%)
10K6.21 mi3.10 mi23329-8213935-5213935-5223405(Top 82%)13983(Top 87%)13983(Top 622%)
15K9.32 mi3.11 mi23274+55139351393523165(Top 82%)13914(Top 86%)13914(Top 619%)
20K12.43 mi3.11 mi23088+18613852+8313852+8322534(Top 79%)13593(Top 84%)13593(Top 605%)
Half13.11 mi0.68 mi23100-1213858-613858-623336(Top 82%)13936(Top 87%)13936(Top 620%)
25K15.53 mi2.42 mi22972+12813784+7413784+7422454(Top 79%)13487(Top 84%)13487(Top 600%)
30K18.64 mi3.11 mi22995-2313750+3413750+3423195(Top 82%)13698(Top 85%)13698(Top 610%)
20M20.00 mi1.36 mi22955+4013709+4113709+4122744(Top 80%)13408(Top 83%)13408(Top 597%)
21M21.00 mi1.00 mi22929+2613677+3213677+3222427(Top 79%)13166(Top 82%)13166(Top 586%)
35K21.75 mi0.75 mi22959-3013680-313680-323604(Top 83%)13688(Top 85%)13688(Top 609%)
23M23.00 mi1.25 mi22938+2113646+3413646+3422870(Top 81%)13279(Top 82%)13279(Top 591%)
24M24.00 mi1.00 mi2293813625+2113625+2123114(Top 81%)13366(Top 83%)13366(Top 595%)
40K24.85 mi0.85 mi22955-1713609+1613609+1623262(Top 82%)13372(Top 83%)13372(Top 595%)
25.2M25.20 mi0.35 mi22959-413606+313606+322431(Top 79%)13009(Top 81%)13009(Top 579%)
Finish26.22 mi1.02 mi22971-12136061360623395(Top 82%)13466(Top 84%)13466(Top 599%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 82%
×21stories
+97ft-345ft

Overall

23165

Males

13914

M40-44

13914

5K→10K

3.1 - 6.2 mi

Top 82%
×5stories
+79ft-138ft

Overall

23405

Males

13983

M40-44

13983

10K→15K

6.2 - 9.3 mi

Top 82%
×3stories
+67ft-78ft

Overall

23165

Males

13914

M40-44

13914

15K→20K

9.3 - 12.4 mi

Top 79%
×5stories
+106ft-86ft

Overall

22534

Males

13593

M40-44

13593

20K→Half

12.4 - 13.1 mi

Top 82%
×2stories
+19ft-37ft

Overall

23336

Males

13936

M40-44

13936

Half→25K

13.1 - 15.5 mi

Top 79%
×4stories
+66ft-88ft

Overall

22454

Males

13487

M40-44

13487

25K→30K

15.5 - 18.6 mi

Top 82%
×9stories
+181ft-148ft

Overall

23195

Males

13698

M40-44

13698

30K→20M

18.6 - 20.0 mi

Top 80%
×5stories
+64ft-50ft

Overall

22744

Males

13408

M40-44

13408

20M→21M

20.0 - 21.0 mi

Top 79%
×8stories
+106ft-24ft

Overall

22427

Males

13166

M40-44

13166

21M→35K

21.0 - 21.8 mi

Top 83%
×7stories
+17ft-86ft

Overall

23604

Males

13688

M40-44

13688

35K→23M

21.8 - 23.0 mi

Top 81%
×5stories
+23ft-63ft

Overall

22870

Males

13279

M40-44

13279

23M→24M

23.0 - 24.0 mi

Top 81%
×6stories
+12ft-82ft

Overall

23114

Males

13366

M40-44

13366

24M→40K

24.0 - 24.9 mi

Top 82%
×1story
+6ft-20ft

Overall

23262

Males

13372

M40-44

13372

40K→25.2M

24.9 - 25.2 mi

Top 79%
×1story
+13ft-16ft

Overall

22431

Males

13009

M40-44

13009

25.2M→Finish

25.2 - 26.2 mi

Top 82%
×2stories
+22ft-21ft

Overall

23395

Males

13466

M40-44

13466

Passing Analysis

Category:
Athletes Passed
1462
Passed By
1186
Net Change
+276
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#23247
5K → 10K194276-82#23247#23329
10K → 15K209154+55#23329#23274
15K → 20K25064+186#23274#23088
20K → Half2638-12#23088#23100
Half → 25K19163+128#23100#22972
25K → 30K152175-23#22972#22995
30K → 20M9555+40#22995#22955
20M → 21M8155+26#22955#22929
21M → 35K3161-30#22929#22959
35K → 23M7958+21#22959#22938
23M → 24M55550#22938#22938
24M → 40K4562-17#22938#22955
40K → 25.2M1923-4#22955#22959
25.2M → Finish3547-12#22959#22971
TOTALS14621186+276
📊

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