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BOSTON MARATHON 2025

Jon Mazzio

Bib: 4304•M

PA

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 10%
Gender (Male)
#0 / 16105
Top 17%
Division (M18-39)
#0 / 5642
Top 39%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:33
Rank: #4702
Start → 5K
20:33 | 6:37/mi
10K· 6.21 mi
41:14
Rank: #4772 (-70)
5K → 10K
20:41 | 6:39/mi
15K· 9.32 mi
1:01:53
Rank: #4699 (+73)
10K → 15K
20:39 | 6:39/mi
20K· 12.43 mi
1:22:33
Rank: #4484 (+215)
15K → 20K
20:40 | 6:39/mi
Half· 13.11 mi
1:27:05
Rank: #4499 (-15)
20K → Half
4:32 | 6:39/mi
25K· 15.53 mi
1:43:18
Rank: #4369 (+130)
Half → 25K
16:13 | 6:41/mi
30K· 18.64 mi
2:04:18
Rank: #4058 (+311)
25K → 30K
21:00 | 6:46/mi
20M
2:13:25
Rank: #3914 (+144)
30K → 20M
9:07 | 6:43/mi
21M
2:20:21
Rank: #3742 (+172)
20M → 21M
6:56 | 6:56/mi
35K· 21.75 mi
2:25:10
Rank: #3668 (+74)
21M → 35K
4:49 | 6:26/mi
23M
2:33:27
Rank: #3490 (+178)
35K → 23M
8:17 | 6:37/mi
24M
2:39:47
Rank: #3322 (+168)
23M → 24M
6:20 | 6:20/mi
40K· 24.85 mi
2:45:19
Rank: #3201 (+121)
24M → 40K
5:32 | 6:28/mi
25.2M
2:47:39
Rank: #3103 (+98)
40K → 25.2M
2:20 | 6:46/mi
Finish· 26.22 mi
2:53:44
Rank: #2954 (+149)
25.2M → Finish
6:05 | 5:58/mi

The Course

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Half Splits

1st Half· via Half⚖️ Balanced
Distance13.11 mi
Time1:27:05
Pace6:39 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:26:39
Pace6:37 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:22:4820:336:3720:33
6:37
-
10K
6.21 mi10:43:2941:146:3820:41
6:39
+0:02
15K
9.32 mi11:04:081:01:536:3820:39
6:39
0:00
20K
12.43 mi11:24:481:22:336:3920:40
6:39
0:00
Half
13.11 mi11:29:201:27:056:394:32
6:39
0:00
25K
15.53 mi11:45:331:43:186:3916:13
6:41
+0:02
30K
18.64 mi12:06:332:04:186:4021:00
6:46
+0:05
20M
20.00 mi12:15:402:13:256:409:07
6:43
-0:03
21M
21.00 mi12:22:362:20:216:416:56
6:56
+0:13
35K
21.75 mi12:27:252:25:106:404:49
6:26
-0:30
23M
23.00 mi12:35:422:33:276:408:17
6:37
+0:11
24M
24.00 mi12:42:022:39:476:396:20
6:20
-0:17
40K
24.85 mi12:47:342:45:196:395:32
6:28
+0:08
25.2M
25.20 mi12:49:542:47:396:392:20
6:46
+0:18
Finish
26.22 mi12:55:592:53:446:386:05
5:58
-0:48

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

5:58 /mi

Average Pace

6:38 /mi

Slowest Pace

6:56 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

22:46

13% of race

Time at Steady Pace

2:30:58

87% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:38 /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 mi10:22:4820:336:3720:33
6:37
#4702
10K
6.21 mi10:43:2941:146:3820:41
6:39
#4772
15K
9.32 mi11:04:081:01:536:3820:39
6:39
#4699
20K
12.43 mi11:24:481:22:336:3920:40
6:39
#4484
Half
13.11 mi11:29:201:27:056:394:32
6:39
#4499
25K
15.53 mi11:45:331:43:186:3916:13
6:41
#4369
30K
18.64 mi12:06:332:04:186:4021:00
6:46
#4058
20M
20.00 mi12:15:402:13:256:409:07
6:43
#3914
21M
21.00 mi12:22:362:20:216:416:56
6:56
#3742
35K
21.75 mi12:27:252:25:106:404:49
6:26
#3668
23M
23.00 mi12:35:422:33:276:408:17
6:37
#3490
24M
24.00 mi12:42:022:39:476:396:20
6:20
#3322
40K
24.85 mi12:47:342:45:196:395:32
6:28
#3201
25.2M
25.20 mi12:49:542:47:396:392:20
6:46
#3103
Finish
26.22 mi12:55:592:53:446:386:05
5:58
#2954
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi4702441044104607(Top 16%)4311(Top 27%)4311(Top 76%)
10K6.21 mi3.10 mi4772-704463-534463-534924(Top 17%)4594(Top 29%)4594(Top 81%)
15K9.32 mi3.11 mi4699+734398+654398+654607(Top 16%)4311(Top 27%)4311(Top 76%)
20K12.43 mi3.11 mi4484+2154202+1964202+1964012(Top 14%)3767(Top 23%)3767(Top 67%)
Half13.11 mi0.68 mi4499-154215-134215-134701(Top 17%)4361(Top 27%)4361(Top 77%)
25K15.53 mi2.42 mi4369+1304096+1194096+1194025(Top 14%)3749(Top 23%)3749(Top 66%)
30K18.64 mi3.11 mi4058+3113807+2893807+2893185(Top 11%)2983(Top 19%)2983(Top 53%)
20M20.00 mi1.36 mi3914+1443676+1313676+1312494(Top 9%)2348(Top 15%)2348(Top 42%)
21M21.00 mi1.00 mi3742+1723518+1583518+1581995(Top 7%)1878(Top 12%)1878(Top 33%)
35K21.75 mi0.75 mi3668+743449+693449+692173(Top 8%)2032(Top 13%)2032(Top 36%)
23M23.00 mi1.25 mi3490+1783284+1653284+1651896(Top 7%)1773(Top 11%)1773(Top 31%)
24M24.00 mi1.00 mi3322+1683126+1583126+1581413(Top 5%)1324(Top 8%)1324(Top 23%)
40K24.85 mi0.85 mi3201+1213015+1113015+1111517(Top 5%)1404(Top 9%)1404(Top 25%)
25.2M25.20 mi0.35 mi3103+982924+912924+91915(Top 3%)848(Top 5%)848(Top 15%)
Finish26.22 mi1.02 mi2954+1492789+1352789+135844(Top 3%)797(Top 5%)797(Top 14%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 16%
×21stories
+97ft-345ft

Overall

4607

Males

4311

M18-39

4311

5K→10K

3.1 - 6.2 mi

Top 17%
×5stories
+79ft-138ft

Overall

4924

Males

4594

M18-39

4594

10K→15K

6.2 - 9.3 mi

Top 16%
×3stories
+67ft-78ft

Overall

4607

Males

4311

M18-39

4311

15K→20K

9.3 - 12.4 mi

Top 14%
×5stories
+106ft-86ft

Overall

4012

Males

3767

M18-39

3767

20K→Half

12.4 - 13.1 mi

Top 17%
×2stories
+19ft-37ft

Overall

4701

Males

4361

M18-39

4361

Half→25K

13.1 - 15.5 mi

Top 14%
×4stories
+66ft-88ft

Overall

4025

Males

3749

M18-39

3749

25K→30K

15.5 - 18.6 mi

Top 11%
×9stories
+181ft-148ft

Overall

3185

Males

2983

M18-39

2983

30K→20M

18.6 - 20.0 mi

Top 9%
×5stories
+64ft-50ft

Overall

2494

Males

2348

M18-39

2348

20M→21M

20.0 - 21.0 mi

Top 7%
×8stories
+106ft-24ft

Overall

1995

Males

1878

M18-39

1878

21M→35K

21.0 - 21.8 mi

Top 8%
×7stories
+17ft-86ft

Overall

2173

Males

2032

M18-39

2032

35K→23M

21.8 - 23.0 mi

Top 7%
×5stories
+23ft-63ft

Overall

1896

Males

1773

M18-39

1773

23M→24M

23.0 - 24.0 mi

Top 5%
×6stories
+12ft-82ft

Overall

1413

Males

1324

M18-39

1324

24M→40K

24.0 - 24.9 mi

Top 5%
×1story
+6ft-20ft

Overall

1517

Males

1404

M18-39

1404

40K→25.2M

24.9 - 25.2 mi

Top 3%
×1story
+13ft-16ft

Overall

915

Males

848

M18-39

848

25.2M→Finish

25.2 - 26.2 mi

Top 3%
×2stories
+22ft-21ft

Overall

844

Males

797

M18-39

797

Passing Analysis

Category:
Athletes Passed
2172
Passed By
424
Net Change
+1748
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#4702
5K → 10K142212-70#4702#4772
10K → 15K15885+73#4772#4699
15K → 20K23924+215#4699#4484
20K → Half1025-15#4484#4499
Half → 25K16636+130#4499#4369
25K → 30K33423+311#4369#4058
30K → 20M1451+144#4058#3914
20M → 21M1753+172#3914#3742
21M → 35K828+74#3742#3668
35K → 23M1791+178#3668#3490
23M → 24M1713+168#3490#3322
24M → 40K1221+121#3322#3201
40K → 25.2M980+98#3201#3103
25.2M → Finish1512+149#3103#2954
TOTALS2172424+1748
📊

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