Boston Marathon logo
BOSTON MARATHON 2025

Matthew Scarzello

Bib: 1204•M

MA

0:00
0:00
/ mi
Be the first to cheer!
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
26:53
Rank: #20750
Start → 5K
26:53 | 8:39/mi
10K· 6.21 mi
52:37
Rank: #19627 (+1123)
5K → 10K
25:44 | 8:17/mi
15K· 9.32 mi
1:31:17
Rank: #24803 (-5176)
10K → 15K
38:40 | 12:27/mi
20K· 12.43 mi
2:01:53
Rank: #24556 (+247)
15K → 20K
30:36 | 9:51/mi
Half· 13.11 mi
2:06:41
Rank: #24198 (+358)
20K → Half
4:48 | 7:02/mi
25K· 15.53 mi
2:24:07
Rank: #22712 (+1486)
Half → 25K
17:26 | 7:11/mi
30K· 18.64 mi
2:47:03
Rank: #20688 (+2024)
25K → 30K
22:56 | 7:23/mi
20M
2:56:49
Rank: #19776 (+912)
30K → 20M
9:46 | 7:11/mi
21M
3:05:45
Rank: #19408 (+368)
20M → 21M
8:56 | 8:56/mi
35K· 21.75 mi
3:11:08
Rank: #19037 (+371)
21M → 35K
5:23 | 7:12/mi
23M
3:20:09
Rank: #18300 (+737)
35K → 23M
9:01 | 7:12/mi
24M
3:27:08
Rank: #17708 (+592)
23M → 24M
6:59 | 6:59/mi
40K· 24.85 mi
3:33:08
Rank: #17249 (+459)
24M → 40K
6:00 | 7:01/mi
25.2M
3:35:38
Rank: #16992 (+257)
40K → 25.2M
2:30 | 7:15/mi
Finish· 26.22 mi
3:42:15
Rank: #16425 (+567)
25.2M → Finish
6:37 | 6:30/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 Half
Distance13.11 mi
Time2:06:41
Pace9:40 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:35:34
Pace7:17 /mi
📊Negative Split: 24.6% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:50:0426:538:3926:53
8:39
-
10K
6.21 mi12:15:4852:378:2825:44
8:17
-0:22
15K
9.32 mi12:54:281:31:179:4838:40
12:27
+4:10
20K
12.43 mi13:25:042:01:539:4830:36
9:51
-2:36
Half
13.11 mi13:29:522:06:419:404:48
7:02
-2:49
25K
15.53 mi13:47:182:24:079:1717:26
7:11
+0:09
30K
18.64 mi14:10:142:47:038:5822:56
7:23
+0:12
20M
20.00 mi14:20:002:56:498:509:46
7:11
-0:12
21M
21.00 mi14:28:563:05:458:518:56
8:56
+1:45
35K
21.75 mi14:34:193:11:088:475:23
7:12
-1:44
23M
23.00 mi14:43:203:20:098:429:01
7:12
0:00
24M
24.00 mi14:50:193:27:088:386:59
6:59
-0:13
40K
24.85 mi14:56:193:33:088:356:00
7:01
+0:02
25.2M
25.20 mi14:58:493:35:388:332:30
7:15
+0:14
Finish
26.22 mi15:05:263:42:158:296:37
6:30
-0:45

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

6:30 /mi

Average Pace

8:29 /mi

Slowest Pace

12:27 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

0:00

0% of race

Time at Steady Pace

1:31:26

41% of race

Time at Slower Pace

2:10:49

59% of race

Average Pace: 8:29 /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 mi11:50:0426:538:3926:53
8:39
#20750
10K
6.21 mi12:15:4852:378:2825:44
8:17
#19627
15K
9.32 mi12:54:281:31:179:4838:40
12:27
#24803
20K
12.43 mi13:25:042:01:539:4830:36
9:51
#24556
Half
13.11 mi13:29:522:06:419:404:48
7:02
#24198
25K
15.53 mi13:47:182:24:079:1717:26
7:11
#22712
30K
18.64 mi14:10:142:47:038:5822:56
7:23
#20688
20M
20.00 mi14:20:002:56:498:509:46
7:11
#19776
21M
21.00 mi14:28:563:05:458:518:56
8:56
#19408
35K
21.75 mi14:34:193:11:088:475:23
7:12
#19037
23M
23.00 mi14:43:203:20:098:429:01
7:12
#18300
24M
24.00 mi14:50:193:27:088:386:59
6:59
#17708
40K
24.85 mi14:56:193:33:088:356:00
7:01
#17249
25.2M
25.20 mi14:58:493:35:388:332:30
7:15
#16992
Finish
26.22 mi15:05:263:42:158:296:37
6:30
#16425
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi20750127461274627895(Top 98%)15912(Top 99%)15912(Top 282%)
10K6.21 mi3.10 mi19627+112312312+43412312+43418422(Top 65%)11815(Top 73%)11815(Top 209%)
15K9.32 mi3.11 mi24803-517614622-231014622-231027895(Top 98%)15912(Top 99%)15912(Top 282%)
20K12.43 mi3.11 mi24556+24714488+13414488+13423875(Top 84%)14174(Top 88%)14174(Top 251%)
Half13.11 mi0.68 mi24198+35814326+16214326+1627858(Top 28%)6820(Top 42%)6820(Top 121%)
25K15.53 mi2.42 mi22712+148613668+65813668+6587541(Top 27%)6471(Top 40%)6471(Top 115%)
30K18.64 mi3.11 mi20688+202412712+95612712+9566950(Top 24%)5942(Top 37%)5942(Top 105%)
20M20.00 mi1.36 mi19776+91212301+41112301+4115146(Top 18%)4595(Top 29%)4595(Top 81%)
21M21.00 mi1.00 mi19408+36812113+18812113+18813126(Top 46%)8918(Top 55%)8918(Top 158%)
35K21.75 mi0.75 mi19037+37111940+17311940+1736595(Top 23%)5461(Top 34%)5461(Top 97%)
23M23.00 mi1.25 mi18300+73711598+34211598+3424900(Top 17%)4251(Top 26%)4251(Top 75%)
24M24.00 mi1.00 mi17708+59211291+30711291+3074568(Top 16%)3961(Top 25%)3961(Top 70%)
40K24.85 mi0.85 mi17249+45911072+21911072+2194045(Top 14%)3533(Top 22%)3533(Top 63%)
25.2M25.20 mi0.35 mi16992+25710949+12310949+1232395(Top 8%)2148(Top 13%)2148(Top 38%)
Finish26.22 mi1.02 mi16425+56710697+25210697+2522818(Top 10%)2525(Top 16%)2525(Top 45%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 98%
×21stories
+97ft-345ft

Overall

27895

Males

15912

M18-39

15912

5K→10K

3.1 - 6.2 mi

Top 65%
×5stories
+79ft-138ft

Overall

18422

Males

11815

M18-39

11815

10K→15K

6.2 - 9.3 mi

Top 98%
×3stories
+67ft-78ft

Overall

27895

Males

15912

M18-39

15912

15K→20K

9.3 - 12.4 mi

Top 84%
×5stories
+106ft-86ft

Overall

23875

Males

14174

M18-39

14174

20K→Half

12.4 - 13.1 mi

Top 28%
×2stories
+19ft-37ft

Overall

7858

Males

6820

M18-39

6820

Half→25K

13.1 - 15.5 mi

Top 27%
×4stories
+66ft-88ft

Overall

7541

Males

6471

M18-39

6471

25K→30K

15.5 - 18.6 mi

Top 24%
×9stories
+181ft-148ft

Overall

6950

Males

5942

M18-39

5942

30K→20M

18.6 - 20.0 mi

Top 18%
×5stories
+64ft-50ft

Overall

5146

Males

4595

M18-39

4595

20M→21M

20.0 - 21.0 mi

Top 46%
×8stories
+106ft-24ft

Overall

13126

Males

8918

M18-39

8918

21M→35K

21.0 - 21.8 mi

Top 23%
×7stories
+17ft-86ft

Overall

6595

Males

5461

M18-39

5461

35K→23M

21.8 - 23.0 mi

Top 17%
×5stories
+23ft-63ft

Overall

4900

Males

4251

M18-39

4251

23M→24M

23.0 - 24.0 mi

Top 16%
×6stories
+12ft-82ft

Overall

4568

Males

3961

M18-39

3961

24M→40K

24.0 - 24.9 mi

Top 14%
×1story
+6ft-20ft

Overall

4045

Males

3533

M18-39

3533

40K→25.2M

24.9 - 25.2 mi

Top 8%
×1story
+13ft-16ft

Overall

2395

Males

2148

M18-39

2148

25.2M→Finish

25.2 - 26.2 mi

Top 10%
×2stories
+22ft-21ft

Overall

2818

Males

2525

M18-39

2525

Passing Analysis

Category:
Athletes Passed
9573
Passed By
5248
Net Change
+4325
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#20750
5K → 10K115633+1123#20750#19627
10K → 15K55181-5176#19627#24803
15K → 20K27932+247#24803#24556
20K → Half3580+358#24556#24198
Half → 25K14860+1486#24198#22712
25K → 30K20240+2024#22712#20688
30K → 20M9120+912#20688#19776
20M → 21M3702+368#19776#19408
21M → 35K3710+371#19408#19037
35K → 23M7370+737#19037#18300
23M → 24M5920+592#18300#17708
24M → 40K4590+459#17708#17249
40K → 25.2M2570+257#17249#16992
25.2M → Finish5670+567#16992#16425
TOTALS95735248+4325
📊

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