Boston Marathon logo
BOSTON MARATHON 2025

David Mazzola

Bib: 16586•M

NJ

0:00
0:00
/ mi
Masters
Be the first to cheer!
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
24:11
Rank: #14663
Start → 5K
24:11 | 7:47/mi
10K· 6.21 mi
50:59
Rank: #18015 (-3352)
5K → 10K
26:48 | 8:38/mi
15K· 9.32 mi
1:18:53
Rank: #19440 (-1425)
10K → 15K
27:54 | 8:59/mi
20K· 12.43 mi
1:47:19
Rank: #20060 (-620)
15K → 20K
28:26 | 9:09/mi
Half· 13.11 mi
1:53:25
Rank: #20124 (-64)
20K → Half
6:06 | 8:56/mi
25K· 15.53 mi
2:18:00
Rank: #21012 (-888)
Half → 25K
24:35 | 10:08/mi
30K· 18.64 mi
2:51:10
Rank: #21676 (-664)
25K → 30K
33:10 | 10:41/mi
20M
3:05:45
Rank: #21815 (-139)
30K → 20M
14:35 | 10:44/mi
21M
3:17:03
Rank: #21857 (-42)
20M → 21M
11:18 | 11:18/mi
35K· 21.75 mi
3:24:21
Rank: #21820 (+37)
21M → 35K
7:18 | 9:45/mi
23M
3:37:29
Rank: #21807 (+13)
35K → 23M
13:08 | 10:29/mi
24M
3:47:36
Rank: #21801 (+6)
23M → 24M
10:07 | 10:07/mi
40K· 24.85 mi
3:56:50
Rank: #21829 (-28)
24M → 40K
9:14 | 10:48/mi
25.2M
4:00:46
Rank: #21824 (+5)
40K → 25.2M
3:56 | 11:24/mi
Finish· 26.22 mi
4:11:20
Rank: #21908 (-84)
25.2M → Finish
10:34 | 10:22/mi

The Course

Is this your race?

Claim it — unlock a deeper AI report on this race, free

A personalized Race Performance Report that goes beyond this page — emailed to you, built from your real splits.

Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:53:25
Pace8:39 /mi
2nd Half
Distance13.11 mi
Time2:17:55
Pace10:31 /mi
📊Positive Split: 21.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:57:2124:117:4724:11
7:47
-
10K
6.21 mi11:24:0950:598:1226:48
8:38
+0:51
15K
9.32 mi11:52:031:18:538:2827:54
8:59
+0:21
20K
12.43 mi12:20:291:47:198:3828:26
9:09
+0:10
Half
13.11 mi12:26:351:53:258:396:06
8:56
-0:13
25K
15.53 mi12:51:102:18:008:5324:35
10:08
+1:12
30K
18.64 mi13:24:202:51:109:1133:10
10:41
+0:33
20M
20.00 mi13:38:553:05:459:1714:35
10:44
+0:03
21M
21.00 mi13:50:133:17:039:2311:18
11:18
+0:34
35K
21.75 mi13:57:313:24:219:247:18
9:45
-1:33
23M
23.00 mi14:10:393:37:299:2713:08
10:29
+0:44
24M
24.00 mi14:20:463:47:369:2910:07
10:07
-0:22
40K
24.85 mi14:30:003:56:509:329:14
10:48
+0:41
25.2M
25.20 mi14:33:564:00:469:333:56
11:24
+0:36
Finish
26.22 mi14:44:304:11:209:3610:34
10:22
-1:02

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

7:47 /mi

Average Pace

9:36 /mi

Slowest Pace

11:24 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:53:25

45% of race

Time at Steady Pace

1:05:42

26% of race

Time at Slower Pace

1:12:13

29% of race

Average Pace: 9:35 /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 mi10:57:2124:117:4724:11
7:47
#14663
10K
6.21 mi11:24:0950:598:1226:48
8:38
#18015
15K
9.32 mi11:52:031:18:538:2827:54
8:59
#19440
20K
12.43 mi12:20:291:47:198:3828:26
9:09
#20060
Half
13.11 mi12:26:351:53:258:396:06
8:56
#20124
25K
15.53 mi12:51:102:18:008:5324:35
10:08
#21012
30K
18.64 mi13:24:202:51:109:1133:10
10:41
#21676
20M
20.00 mi13:38:553:05:459:1714:35
10:44
#21815
21M
21.00 mi13:50:133:17:039:2311:18
11:18
#21857
35K
21.75 mi13:57:313:24:219:247:18
9:45
#21820
23M
23.00 mi14:10:393:37:299:2713:08
10:29
#21807
24M
24.00 mi14:20:463:47:369:2910:07
10:07
#21801
40K
24.85 mi14:30:003:56:509:329:14
10:48
#21829
25.2M
25.20 mi14:33:564:00:469:333:56
11:24
#21824
Finish
26.22 mi14:44:304:11:209:3610:34
10:22
#21908
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi14663102991029921946(Top 77%)13367(Top 83%)13367(Top 595%)
10K6.21 mi3.10 mi18015-335211627-132811627-132820476(Top 72%)12692(Top 79%)12692(Top 565%)
15K9.32 mi3.11 mi19440-142512237-61012237-61021946(Top 77%)13367(Top 83%)13367(Top 595%)
20K12.43 mi3.11 mi20060-62012499-26212499-26221673(Top 76%)13202(Top 82%)13202(Top 588%)
Half13.11 mi0.68 mi20124-6412524-2512524-2521553(Top 76%)13157(Top 82%)13157(Top 586%)
25K15.53 mi2.42 mi21012-88812914-39012914-39023583(Top 83%)13997(Top 87%)13997(Top 623%)
30K18.64 mi3.11 mi21676-66413171-25713171-25723333(Top 82%)13758(Top 85%)13758(Top 612%)
20M20.00 mi1.36 mi21815-13913223-5213223-5223018(Top 81%)13531(Top 84%)13531(Top 602%)
21M21.00 mi1.00 mi21857-4213217+613217+622144(Top 78%)13036(Top 81%)13036(Top 580%)
35K21.75 mi0.75 mi21820+3713182+3513182+3521183(Top 75%)12528(Top 78%)12528(Top 558%)
23M23.00 mi1.25 mi21807+1313140+4213140+4221990(Top 77%)12871(Top 80%)12871(Top 573%)
24M24.00 mi1.00 mi21801+613114+2613114+2621682(Top 76%)12671(Top 79%)12671(Top 564%)
40K24.85 mi0.85 mi21829-2813104+1013104+1022668(Top 80%)13074(Top 81%)13074(Top 582%)
25.2M25.20 mi0.35 mi21824+513100+413100+421788(Top 77%)12685(Top 79%)12685(Top 565%)
Finish26.22 mi1.02 mi21908-8413124-2413124-2423956(Top 84%)13742(Top 85%)13742(Top 612%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 77%
×21stories
+97ft-345ft

Overall

21946

Males

13367

M40-44

13367

5K→10K

3.1 - 6.2 mi

Top 72%
×5stories
+79ft-138ft

Overall

20476

Males

12692

M40-44

12692

10K→15K

6.2 - 9.3 mi

Top 77%
×3stories
+67ft-78ft

Overall

21946

Males

13367

M40-44

13367

15K→20K

9.3 - 12.4 mi

Top 76%
×5stories
+106ft-86ft

Overall

21673

Males

13202

M40-44

13202

20K→Half

12.4 - 13.1 mi

Top 76%
×2stories
+19ft-37ft

Overall

21553

Males

13157

M40-44

13157

Half→25K

13.1 - 15.5 mi

Top 83%
×4stories
+66ft-88ft

Overall

23583

Males

13997

M40-44

13997

25K→30K

15.5 - 18.6 mi

Top 82%
×9stories
+181ft-148ft

Overall

23333

Males

13758

M40-44

13758

30K→20M

18.6 - 20.0 mi

Top 81%
×5stories
+64ft-50ft

Overall

23018

Males

13531

M40-44

13531

20M→21M

20.0 - 21.0 mi

Top 78%
×8stories
+106ft-24ft

Overall

22144

Males

13036

M40-44

13036

21M→35K

21.0 - 21.8 mi

Top 75%
×7stories
+17ft-86ft

Overall

21183

Males

12528

M40-44

12528

35K→23M

21.8 - 23.0 mi

Top 77%
×5stories
+23ft-63ft

Overall

21990

Males

12871

M40-44

12871

23M→24M

23.0 - 24.0 mi

Top 76%
×6stories
+12ft-82ft

Overall

21682

Males

12671

M40-44

12671

24M→40K

24.0 - 24.9 mi

Top 80%
×1story
+6ft-20ft

Overall

22668

Males

13074

M40-44

13074

40K→25.2M

24.9 - 25.2 mi

Top 77%
×1story
+13ft-16ft

Overall

21788

Males

12685

M40-44

12685

25.2M→Finish

25.2 - 26.2 mi

Top 84%
×2stories
+22ft-21ft

Overall

23956

Males

13742

M40-44

13742

Passing Analysis

Category:
Athletes Passed
587
Passed By
7832
Net Change
-7245
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#14663
5K → 10K73359-3352#14663#18015
10K → 15K141439-1425#18015#19440
15K → 20K66686-620#19440#20060
20K → Half1579-64#20060#20124
Half → 25K24912-888#20124#21012
25K → 30K64728-664#21012#21676
30K → 20M42181-139#21676#21815
20M → 21M67109-42#21815#21857
21M → 35K6326+37#21857#21820
35K → 23M8572+13#21820#21807
23M → 24M5246+6#21807#21801
24M → 40K3866-28#21801#21829
40K → 25.2M2722+5#21829#21824
25.2M → Finish23107-84#21824#21908
TOTALS5877832-7245
📊

Passing Visuals

Category:
Loading...

🔥Passing Intensity

Loading...

🔄Passing Circle

Loading...

🌊Position Flow

Loading...

🏃Race Lanes

Loading...

Upload your GPX file

Supports Garmin, Apple Watch, Polar, Suunto, COROS, Strava, and other apps

.gpx files up to 10MB

Export Track Data

Download your race performance as a GPX or TCX file to import into Strava, Garmin Connect, or other fitness apps.

Questions or issues regarding timing data?

If you notice any discrepancies in your timing data or have questions about your results, our support team can help.

Contact Race Support
Share Feedback

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing