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BOSTON MARATHON 2025

John Belcik

Bib: 24142•M

IL

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M65-69)
#0 / 639
Top 28%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
25:24
Rank: #17935
Start → 5K
25:24 | 8:11/mi
10K· 6.21 mi
51:52
Rank: #18900 (-965)
5K → 10K
26:28 | 8:31/mi
15K· 9.32 mi
1:18:49
Rank: #19391 (-491)
10K → 15K
26:57 | 8:40/mi
20K· 12.43 mi
1:46:14
Rank: #19572 (-181)
15K → 20K
27:25 | 8:49/mi
Half· 13.11 mi
1:52:09
Rank: #19606 (-34)
20K → Half
5:55 | 8:40/mi
25K· 15.53 mi
2:13:55
Rank: #19623 (-17)
Half → 25K
21:46 | 8:59/mi
30K· 18.64 mi
2:42:59
Rank: #19549 (+74)
25K → 30K
29:04 | 9:21/mi
20M
2:55:34
Rank: #19457 (+92)
30K → 20M
12:35 | 9:16/mi
21M
3:05:07
Rank: #19257 (+200)
20M → 21M
9:33 | 9:33/mi
35K· 21.75 mi
3:11:54
Rank: #19237 (+20)
21M → 35K
6:47 | 9:04/mi
23M
3:23:19
Rank: #19099 (+138)
35K → 23M
11:25 | 9:07/mi
24M
3:32:16
Rank: #19013 (+86)
23M → 24M
8:57 | 8:57/mi
40K· 24.85 mi
3:40:03
Rank: #18906 (+107)
24M → 40K
7:47 | 9:06/mi
25.2M
3:43:24
Rank: #18860 (+46)
40K → 25.2M
3:21 | 9:43/mi
Finish· 26.22 mi
3:52:03
Rank: #18750 (+110)
25.2M → Finish
8:39 | 8:29/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:52:09
Pace8:33 /mi
2nd Half
Distance13.11 mi
Time1:59:54
Pace9:09 /mi
📊Positive Split: 6.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:24:4225:248:1125:24
8:11
-
10K
6.21 mi11:51:1051:528:2126:28
8:31
+0:20
15K
9.32 mi12:18:071:18:498:2726:57
8:40
+0:09
20K
12.43 mi12:45:321:46:148:3327:25
8:49
+0:09
Half
13.11 mi12:51:271:52:098:335:55
8:40
-0:09
25K
15.53 mi13:13:132:13:558:3721:46
8:59
+0:19
30K
18.64 mi13:42:172:42:598:4529:04
9:21
+0:22
20M
20.00 mi13:54:522:55:348:4712:35
9:16
-0:05
21M
21.00 mi14:04:253:05:078:499:33
9:33
+0:17
35K
21.75 mi14:11:123:11:548:496:47
9:04
-0:29
23M
23.00 mi14:22:373:23:198:5011:25
9:07
+0:03
24M
24.00 mi14:31:343:32:168:518:57
8:57
-0:10
40K
24.85 mi14:39:213:40:038:517:47
9:06
+0:09
25.2M
25.20 mi14:42:423:43:248:523:21
9:43
+0:37
Finish
26.22 mi14:51:213:52:038:518:39
8:29
-1:14

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

8:11 /mi

Average Pace

8:51 /mi

Slowest Pace

9:43 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:31:31

65% of race

Time at Steady Pace

1:17:11

33% of race

Time at Slower Pace

3:21

1% of race

Average Pace: 8:51 /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 mi11:24:4225:248:1125:24
8:11
#17935
10K
6.21 mi11:51:1051:528:2126:28
8:31
#18900
15K
9.32 mi12:18:071:18:498:2726:57
8:40
#19391
20K
12.43 mi12:45:321:46:148:3327:25
8:49
#19572
Half
13.11 mi12:51:271:52:098:335:55
8:40
#19606
25K
15.53 mi13:13:132:13:558:3721:46
8:59
#19623
30K
18.64 mi13:42:172:42:598:4529:04
9:21
#19549
20M
20.00 mi13:54:522:55:348:4712:35
9:16
#19457
21M
21.00 mi14:04:253:05:078:499:33
9:33
#19257
35K
21.75 mi14:11:123:11:548:496:47
9:04
#19237
23M
23.00 mi14:22:373:23:198:5011:25
9:07
#19099
24M
24.00 mi14:31:343:32:168:518:57
8:57
#19013
40K
24.85 mi14:39:213:40:038:517:47
9:06
#18906
25.2M
25.20 mi14:42:423:43:248:523:21
9:43
#18860
Finish
26.22 mi14:51:213:52:038:518:39
8:29
#18750
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM65-69Seg. OverallSeg. MalesSeg. M65-69
5K3.11 mi3.11 mi17935115811158120317(Top 72%)12653(Top 79%)12653(Top 1980%)
10K6.21 mi3.10 mi18900-96511998-41711998-41719903(Top 70%)12432(Top 77%)12432(Top 1946%)
15K9.32 mi3.11 mi19391-49112216-21812216-21820317(Top 72%)12653(Top 79%)12653(Top 1980%)
20K12.43 mi3.11 mi19572-18112288-7212288-7220052(Top 71%)12488(Top 78%)12488(Top 1954%)
Half13.11 mi0.68 mi19606-3412299-1112299-1120144(Top 71%)12512(Top 78%)12512(Top 1958%)
25K15.53 mi2.42 mi19623-1712296+312296+319783(Top 70%)12320(Top 76%)12320(Top 1928%)
30K18.64 mi3.11 mi19549+7412227+6912227+6919364(Top 68%)11991(Top 74%)11991(Top 1877%)
20M20.00 mi1.36 mi19457+9212166+6112166+6118081(Top 64%)11274(Top 70%)11274(Top 1764%)
21M21.00 mi1.00 mi19257+20012056+11012056+11016303(Top 57%)10395(Top 65%)10395(Top 1627%)
35K21.75 mi0.75 mi19237+2012029+2712029+2718544(Top 65%)11275(Top 70%)11275(Top 1764%)
23M23.00 mi1.25 mi19099+13811942+8711942+8716908(Top 60%)10470(Top 65%)10470(Top 1638%)
24M24.00 mi1.00 mi19013+8611886+5611886+5617105(Top 60%)10513(Top 65%)10513(Top 1645%)
40K24.85 mi0.85 mi18906+10711806+8011806+8016870(Top 59%)10316(Top 64%)10316(Top 1614%)
25.2M25.20 mi0.35 mi18860+4611781+2511781+2515662(Top 55%)9728(Top 60%)9728(Top 1522%)
Finish26.22 mi1.02 mi18750+11011709+7211709+7216137(Top 57%)10003(Top 62%)10003(Top 1565%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 72%
×21stories
+97ft-345ft

Overall

20317

Males

12653

M65-69

12653

5K→10K

3.1 - 6.2 mi

Top 70%
×5stories
+79ft-138ft

Overall

19903

Males

12432

M65-69

12432

10K→15K

6.2 - 9.3 mi

Top 72%
×3stories
+67ft-78ft

Overall

20317

Males

12653

M65-69

12653

15K→20K

9.3 - 12.4 mi

Top 71%
×5stories
+106ft-86ft

Overall

20052

Males

12488

M65-69

12488

20K→Half

12.4 - 13.1 mi

Top 71%
×2stories
+19ft-37ft

Overall

20144

Males

12512

M65-69

12512

Half→25K

13.1 - 15.5 mi

Top 70%
×4stories
+66ft-88ft

Overall

19783

Males

12320

M65-69

12320

25K→30K

15.5 - 18.6 mi

Top 68%
×9stories
+181ft-148ft

Overall

19364

Males

11991

M65-69

11991

30K→20M

18.6 - 20.0 mi

Top 64%
×5stories
+64ft-50ft

Overall

18081

Males

11274

M65-69

11274

20M→21M

20.0 - 21.0 mi

Top 57%
×8stories
+106ft-24ft

Overall

16303

Males

10395

M65-69

10395

21M→35K

21.0 - 21.8 mi

Top 65%
×7stories
+17ft-86ft

Overall

18544

Males

11275

M65-69

11275

35K→23M

21.8 - 23.0 mi

Top 60%
×5stories
+23ft-63ft

Overall

16908

Males

10470

M65-69

10470

23M→24M

23.0 - 24.0 mi

Top 60%
×6stories
+12ft-82ft

Overall

17105

Males

10513

M65-69

10513

24M→40K

24.0 - 24.9 mi

Top 59%
×1story
+6ft-20ft

Overall

16870

Males

10316

M65-69

10316

40K→25.2M

24.9 - 25.2 mi

Top 55%
×1story
+13ft-16ft

Overall

15662

Males

9728

M65-69

9728

25.2M→Finish

25.2 - 26.2 mi

Top 57%
×2stories
+22ft-21ft

Overall

16137

Males

10003

M65-69

10003

Passing Analysis

Category:
Athletes Passed
1695
Passed By
2510
Net Change
-815
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#17935
5K → 10K501015-965#17935#18900
10K → 15K69560-491#18900#19391
15K → 20K142323-181#19391#19572
20K → Half2660-34#19572#19606
Half → 25K154171-17#19606#19623
25K → 30K247173+74#19623#19549
30K → 20M14856+92#19549#19457
20M → 21M21717+200#19457#19257
21M → 35K6343+20#19257#19237
35K → 23M16123+138#19237#19099
23M → 24M11529+86#19099#19013
24M → 40K12114+107#19013#18906
40K → 25.2M548+46#18906#18860
25.2M → Finish12818+110#18860#18750
TOTALS16952510-815
📊

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