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BOSTON MARATHON 2025

Christopher Klucznik

Bib: 997•M

MA

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 6%
Gender (Male)
#0 / 16105
Top 9%
Masters (Masters Men)
#0 / 10463
Top 2%
Division (M40-44)
#0 / 2247
Top 7%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
18:57
Rank: #1429
Start → 5K
18:57 | 6:06/mi
10K· 6.21 mi
38:13
Rank: #1638 (-209)
5K → 10K
19:16 | 6:12/mi
15K· 9.32 mi
57:42
Rank: #1815 (-177)
10K → 15K
19:29 | 6:16/mi
20K· 12.43 mi
1:17:13
Rank: #1820 (-5)
15K → 20K
19:31 | 6:17/mi
Half· 13.11 mi
1:21:23
Rank: #1805 (+15)
20K → Half
4:10 | 6:06/mi
25K· 15.53 mi
1:36:38
Rank: #1796 (+9)
Half → 25K
15:15 | 6:17/mi
30K· 18.64 mi
1:56:44
Rank: #1774 (+22)
25K → 30K
20:06 | 6:28/mi
20M
2:05:47
Rank: #1785 (-11)
30K → 20M
9:03 | 6:40/mi
21M
2:12:42
Rank: #1759 (+26)
20M → 21M
6:55 | 6:55/mi
35K· 21.75 mi
2:17:31
Rank: #1754 (+5)
21M → 35K
4:49 | 6:26/mi
23M
2:25:44
Rank: #1720 (+34)
35K → 23M
8:13 | 6:34/mi
24M
2:32:06
Rank: #1681 (+39)
23M → 24M
6:22 | 6:22/mi
40K· 24.85 mi
2:37:37
Rank: #1634 (+47)
24M → 40K
5:31 | 6:27/mi
25.2M
2:40:01
Rank: #1620 (+14)
40K → 25.2M
2:24 | 6:58/mi
Finish· 26.22 mi
2:46:24
Rank: #1603 (+17)
25.2M → Finish
6:23 | 6:16/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:21:23
Pace6:12 /mi
2nd Half
Distance13.11 mi
Time1:25:01
Pace6:29 /mi
📊Positive Split: 4.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:19:0818:576:0618:57
6:06
-
10K
6.21 mi10:38:2438:136:0919:16
6:12
+0:06
15K
9.32 mi10:57:5357:426:1119:29
6:16
+0:04
20K
12.43 mi11:17:241:17:136:1319:31
6:17
+0:01
Half
13.11 mi11:21:341:21:236:124:10
6:06
-0:11
25K
15.53 mi11:36:491:36:386:1315:15
6:17
+0:11
30K
18.64 mi11:56:551:56:446:1620:06
6:28
+0:11
20M
20.00 mi12:05:582:05:476:179:03
6:40
+0:12
21M
21.00 mi12:12:532:12:426:196:55
6:55
+0:15
35K
21.75 mi12:17:422:17:316:194:49
6:26
-0:29
23M
23.00 mi12:25:552:25:446:208:13
6:34
+0:08
24M
24.00 mi12:32:172:32:066:206:22
6:22
-0:12
40K
24.85 mi12:37:482:37:376:205:31
6:27
+0:05
25.2M
25.20 mi12:40:122:40:016:212:24
6:58
+0:31
Finish
26.22 mi12:46:352:46:246:216:23
6:16
-0:42

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

6:06 /mi

Average Pace

6:21 /mi

Slowest Pace

6:58 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:37:05

94% of race

Time at Steady Pace

9:19

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:21 /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 mi10:19:0818:576:0618:57
6:06
#1429
10K
6.21 mi10:38:2438:136:0919:16
6:12
#1638
15K
9.32 mi10:57:5357:426:1119:29
6:16
#1815
20K
12.43 mi11:17:241:17:136:1319:31
6:17
#1820
Half
13.11 mi11:21:341:21:236:124:10
6:06
#1805
25K
15.53 mi11:36:491:36:386:1315:15
6:17
#1796
30K
18.64 mi11:56:551:56:446:1620:06
6:28
#1774
20M
20.00 mi12:05:582:05:476:179:03
6:40
#1785
21M
21.00 mi12:12:532:12:426:196:55
6:55
#1759
35K
21.75 mi12:17:422:17:316:194:49
6:26
#1754
23M
23.00 mi12:25:552:25:446:208:13
6:34
#1720
24M
24.00 mi12:32:172:32:066:206:22
6:22
#1681
40K
24.85 mi12:37:482:37:376:205:31
6:27
#1634
25.2M
25.20 mi12:40:122:40:016:212:24
6:58
#1620
Finish
26.22 mi12:46:352:46:246:216:23
6:16
#1603
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi1429136113612209(Top 8%)2105(Top 13%)2105(Top 94%)
10K6.21 mi3.10 mi1638-2091559-1981559-1981935(Top 7%)1841(Top 11%)1841(Top 82%)
15K9.32 mi3.11 mi1815-1771727-1681727-1682209(Top 8%)2105(Top 13%)2105(Top 94%)
20K12.43 mi3.11 mi1820-51731-41731-41935(Top 7%)1843(Top 11%)1843(Top 82%)
Half13.11 mi0.68 mi1805+151716+151716+151577(Top 6%)1500(Top 9%)1500(Top 67%)
25K15.53 mi2.42 mi1796+91708+81708+81810(Top 6%)1720(Top 11%)1720(Top 77%)
30K18.64 mi3.11 mi1774+221689+191689+191852(Top 7%)1762(Top 11%)1762(Top 78%)
20M20.00 mi1.36 mi1785-111697-81697-82283(Top 8%)2157(Top 13%)2157(Top 96%)
21M21.00 mi1.00 mi1759+261670+271670+271947(Top 7%)1836(Top 11%)1836(Top 82%)
35K21.75 mi0.75 mi1754+51664+61664+62192(Top 8%)2051(Top 13%)2051(Top 91%)
23M23.00 mi1.25 mi1720+341630+341630+341701(Top 6%)1590(Top 10%)1590(Top 71%)
24M24.00 mi1.00 mi1681+391591+391591+391546(Top 5%)1445(Top 9%)1445(Top 64%)
40K24.85 mi0.85 mi1634+471547+441547+441454(Top 5%)1348(Top 8%)1348(Top 60%)
25.2M25.20 mi0.35 mi1620+141533+141533+141383(Top 5%)1270(Top 8%)1270(Top 57%)
Finish26.22 mi1.02 mi1603+171518+151518+151764(Top 6%)1634(Top 10%)1634(Top 73%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 8%
×21stories
+97ft-345ft

Overall

2209

Males

2105

M40-44

2105

5K→10K

3.1 - 6.2 mi

Top 7%
×5stories
+79ft-138ft

Overall

1935

Males

1841

M40-44

1841

10K→15K

6.2 - 9.3 mi

Top 8%
×3stories
+67ft-78ft

Overall

2209

Males

2105

M40-44

2105

15K→20K

9.3 - 12.4 mi

Top 7%
×5stories
+106ft-86ft

Overall

1935

Males

1843

M40-44

1843

20K→Half

12.4 - 13.1 mi

Top 6%
×2stories
+19ft-37ft

Overall

1577

Males

1500

M40-44

1500

Half→25K

13.1 - 15.5 mi

Top 6%
×4stories
+66ft-88ft

Overall

1810

Males

1720

M40-44

1720

25K→30K

15.5 - 18.6 mi

Top 7%
×9stories
+181ft-148ft

Overall

1852

Males

1762

M40-44

1762

30K→20M

18.6 - 20.0 mi

Top 8%
×5stories
+64ft-50ft

Overall

2283

Males

2157

M40-44

2157

20M→21M

20.0 - 21.0 mi

Top 7%
×8stories
+106ft-24ft

Overall

1947

Males

1836

M40-44

1836

21M→35K

21.0 - 21.8 mi

Top 8%
×7stories
+17ft-86ft

Overall

2192

Males

2051

M40-44

2051

35K→23M

21.8 - 23.0 mi

Top 6%
×5stories
+23ft-63ft

Overall

1701

Males

1590

M40-44

1590

23M→24M

23.0 - 24.0 mi

Top 5%
×6stories
+12ft-82ft

Overall

1546

Males

1445

M40-44

1445

24M→40K

24.0 - 24.9 mi

Top 5%
×1story
+6ft-20ft

Overall

1454

Males

1348

M40-44

1348

40K→25.2M

24.9 - 25.2 mi

Top 5%
×1story
+13ft-16ft

Overall

1383

Males

1270

M40-44

1270

25.2M→Finish

25.2 - 26.2 mi

Top 6%
×2stories
+22ft-21ft

Overall

1764

Males

1634

M40-44

1634

Passing Analysis

Category:
Athletes Passed
572
Passed By
746
Net Change
-174
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#1429
5K → 10K17226-209#1429#1638
10K → 15K19196-177#1638#1815
15K → 20K5964-5#1815#1820
20K → Half172+15#1820#1805
Half → 25K5546+9#1805#1796
25K → 30K8058+22#1796#1774
30K → 20M3849-11#1774#1785
20M → 21M4721+26#1785#1759
21M → 35K2217+5#1759#1754
35K → 23M5622+34#1754#1720
23M → 24M5112+39#1720#1681
24M → 40K536+47#1681#1634
40K → 25.2M195+14#1634#1620
25.2M → Finish3922+17#1620#1603
TOTALS572746-174
📊

Passing Visuals

Category:

📈Position Graph

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🎨Heatmap Timeline

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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