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BOSTON MARATHON 2025

Lukasz Kaczmarek

Bib: 3380•M

0:00
0:00
/ mi
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Division (M18-39)
#0 / 5642
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
22:36
Rank: #10094
Start → 5K
22:36 | 7:16/mi
10K· 6.21 mi
45:51
Rank: #11040 (-946)
5K → 10K
23:15 | 7:29/mi
15K· 9.32 mi
1:09:03
Rank: #11141 (-101)
10K → 15K
23:12 | 7:28/mi
20K· 12.43 mi
1:32:11
Rank: #10911 (+230)
15K → 20K
23:08 | 7:27/mi
Half· 13.11 mi
1:37:14
Rank: #10895 (+16)
20K → Half
5:03 | 7:24/mi
25K· 15.53 mi
1:55:41
Rank: #10869 (+26)
Half → 25K
18:27 | 7:37/mi
30K· 18.64 mi
2:20:35
Rank: #10960 (-91)
25K → 30K
24:54 | 8:01/mi
20M
2:32:52
Rank: #11424 (-464)
30K → 20M
12:17 | 9:02/mi
21M
2:43:10
Rank: #12055 (-631)
20M → 21M
10:18 | 10:18/mi
35K· 21.75 mi
2:50:12
Rank: #12427 (-372)
21M → 35K
7:02 | 9:24/mi
23M
3:05:55
Rank: #14201 (-1774)
35K → 23M
15:43 | 12:33/mi
24M
3:23:06
Rank: #16641 (-2440)
23M → 24M
17:11 | 17:11/mi
40K· 24.85 mi
3:34:03
Rank: #17480 (-839)
24M → 40K
10:57 | 12:48/mi
25.2M
3:38:35
Rank: #17712 (-232)
40K → 25.2M
4:32 | 13:09/mi
Finish· 26.22 mi
3:48:46
Rank: #18034 (-322)
25.2M → Finish
10:11 | 10:00/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:37:14
Pace7:25 /mi
2nd Half
Distance13.11 mi
Time2:11:32
Pace10:02 /mi
📊Positive Split: 35.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:13:0822:367:1622:36
7:16
-
10K
6.21 mi11:36:2345:517:2323:15
7:29
+0:13
15K
9.32 mi11:59:351:09:037:2523:12
7:28
-0:01
20K
12.43 mi12:22:431:32:117:2523:08
7:27
-0:01
Half
13.11 mi12:27:461:37:147:255:03
7:24
-0:03
25K
15.53 mi12:46:131:55:417:2718:27
7:37
+0:13
30K
18.64 mi13:11:072:20:357:3224:54
8:01
+0:24
20M
20.00 mi13:23:242:32:527:3912:17
9:02
+1:01
21M
21.00 mi13:33:422:43:107:4610:18
10:18
+1:16
35K
21.75 mi13:40:442:50:127:507:02
9:24
-0:54
23M
23.00 mi13:56:273:05:558:0515:43
12:33
+3:09
24M
24.00 mi14:13:383:23:068:2817:11
17:11
+4:38
40K
24.85 mi14:24:353:34:038:3710:57
12:48
-4:23
25.2M
25.20 mi14:29:073:38:358:404:32
13:09
+0:21
Finish
26.22 mi14:39:183:48:468:4410:11
10:00
-3:09

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

7:16 /mi

Average Pace

8:44 /mi

Slowest Pace

17:11 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:55:41

51% of race

Time at Steady Pace

1:04:42

28% of race

Time at Slower Pace

48:23

21% of race

Average Pace: 8:43 /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 mi11:13:0822:367:1622:36
7:16
#10094
10K
6.21 mi11:36:2345:517:2323:15
7:29
#11040
15K
9.32 mi11:59:351:09:037:2523:12
7:28
#11141
20K
12.43 mi12:22:431:32:117:2523:08
7:27
#10911
Half
13.11 mi12:27:461:37:147:255:03
7:24
#10895
25K
15.53 mi12:46:131:55:417:2718:27
7:37
#10869
30K
18.64 mi13:11:072:20:357:3224:54
8:01
#10960
20M
20.00 mi13:23:242:32:527:3912:17
9:02
#11424
21M
21.00 mi13:33:422:43:107:4610:18
10:18
#12055
35K
21.75 mi13:40:442:50:127:507:02
9:24
#12427
23M
23.00 mi13:56:273:05:558:0515:43
12:33
#14201
24M
24.00 mi14:13:383:23:068:2817:11
17:11
#16641
40K
24.85 mi14:24:353:34:038:3710:57
12:48
#17480
25.2M
25.20 mi14:29:073:38:358:404:32
13:09
#17712
Finish
26.22 mi14:39:183:48:468:4410:11
10:00
#18034
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi100948228822811485(Top 40%)8831(Top 55%)8831(Top 157%)
10K6.21 mi3.10 mi11040-9468695-4678695-46711954(Top 42%)9134(Top 57%)9134(Top 162%)
15K9.32 mi3.11 mi11141-1018724-298724-2911485(Top 40%)8831(Top 55%)8831(Top 157%)
20K12.43 mi3.11 mi10911+2308590+1348590+13410304(Top 36%)8178(Top 51%)8178(Top 145%)
Half13.11 mi0.68 mi10895+168578+128578+1210900(Top 38%)8525(Top 53%)8525(Top 151%)
25K15.53 mi2.42 mi10869+268526+528526+5210850(Top 38%)8324(Top 52%)8324(Top 148%)
30K18.64 mi3.11 mi10960-918482+448482+4411484(Top 40%)8434(Top 52%)8434(Top 149%)
20M20.00 mi1.36 mi11424-4648662-1808662-18016999(Top 60%)10825(Top 67%)10825(Top 192%)
21M21.00 mi1.00 mi12055-6318926-2648926-26419355(Top 68%)11769(Top 73%)11769(Top 209%)
35K21.75 mi0.75 mi12427-3729071-1459071-14519928(Top 70%)11933(Top 74%)11933(Top 212%)
23M23.00 mi1.25 mi14201-17749823-7529823-75225860(Top 91%)14762(Top 92%)14762(Top 262%)
24M24.00 mi1.00 mi16641-244010859-103610859-103628321(Top 100%)16048(Top 100%)16048(Top 284%)
40K24.85 mi0.85 mi17480-83911165-30611165-30626077(Top 92%)14829(Top 92%)14829(Top 263%)
25.2M25.20 mi0.35 mi17712-23211261-9611261-9625226(Top 89%)14352(Top 89%)14352(Top 254%)
Finish26.22 mi1.02 mi18034-32211396-13511396-13522906(Top 81%)13222(Top 82%)13222(Top 234%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 40%
×21stories
+97ft-345ft

Overall

11485

Males

8831

M18-39

8831

5K→10K

3.1 - 6.2 mi

Top 42%
×5stories
+79ft-138ft

Overall

11954

Males

9134

M18-39

9134

10K→15K

6.2 - 9.3 mi

Top 40%
×3stories
+67ft-78ft

Overall

11485

Males

8831

M18-39

8831

15K→20K

9.3 - 12.4 mi

Top 36%
×5stories
+106ft-86ft

Overall

10304

Males

8178

M18-39

8178

20K→Half

12.4 - 13.1 mi

Top 38%
×2stories
+19ft-37ft

Overall

10900

Males

8525

M18-39

8525

Half→25K

13.1 - 15.5 mi

Top 38%
×4stories
+66ft-88ft

Overall

10850

Males

8324

M18-39

8324

25K→30K

15.5 - 18.6 mi

Top 40%
×9stories
+181ft-148ft

Overall

11484

Males

8434

M18-39

8434

30K→20M

18.6 - 20.0 mi

Top 60%
×5stories
+64ft-50ft

Overall

16999

Males

10825

M18-39

10825

20M→21M

20.0 - 21.0 mi

Top 68%
×8stories
+106ft-24ft

Overall

19355

Males

11769

M18-39

11769

21M→35K

21.0 - 21.8 mi

Top 70%
×7stories
+17ft-86ft

Overall

19928

Males

11933

M18-39

11933

35K→23M

21.8 - 23.0 mi

Top 91%
×5stories
+23ft-63ft

Overall

25860

Males

14762

M18-39

14762

23M→24M

23.0 - 24.0 mi

Top 100%
×6stories
+12ft-82ft

Overall

28321

Males

16048

M18-39

16048

24M→40K

24.0 - 24.9 mi

Top 92%
×1story
+6ft-20ft

Overall

26077

Males

14829

M18-39

14829

40K→25.2M

24.9 - 25.2 mi

Top 89%
×1story
+13ft-16ft

Overall

25226

Males

14352

M18-39

14352

25.2M→Finish

25.2 - 26.2 mi

Top 81%
×2stories
+22ft-21ft

Overall

22906

Males

13222

M18-39

13222

Passing Analysis

Category:
Athletes Passed
1006
Passed By
8945
Net Change
-7940
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#10094
5K → 10K42987-946#10094#11040
10K → 15K145246-101#11040#11141
15K → 20K29262+230#11141#10911
20K → Half4125+16#10911#10895
Half → 25K177151+26#10895#10869
25K → 30K209300-91#10869#10960
30K → 20M39503-464#10960#11424
20M → 21M17648-631#11424#12055
21M → 35K17389-372#12055#12427
35K → 23M51779-1774#12427#14201
23M → 24M02440-2440#14201#16641
24M → 40K6845-839#16641#17480
40K → 25.2M3235-232#17480#17712
25.2M → Finish13335-322#17712#18034
TOTALS10068945-7940
📊

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