Boston Marathon logo
BOSTON MARATHON 2025

David Defelice

Bib: 1102•M

MA

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 28404
Top 2%
Gender (Male)
#0 / 16105
Top 2%
Division (M18-39)
#0 / 5642
Top 6%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
18:10
Rank: #704
Start → 5K
18:10 | 5:51/mi
10K· 6.21 mi
36:17
Rank: #665 (+39)
5K → 10K
18:07 | 5:50/mi
15K· 9.32 mi
54:22
Rank: #624 (+41)
10K → 15K
18:05 | 5:49/mi
20K· 12.43 mi
1:12:31
Rank: #588 (+36)
15K → 20K
18:09 | 5:51/mi
Half· 13.11 mi
1:16:30
Rank: #589 (-1)
20K → Half
3:59 | 5:50/mi
25K· 15.53 mi
1:30:40
Rank: #561 (+28)
Half → 25K
14:10 | 5:51/mi
30K· 18.64 mi
1:49:12
Rank: #522 (+39)
25K → 30K
18:32 | 5:58/mi
20M
1:57:17
Rank: #495 (+27)
30K → 20M
8:05 | 5:57/mi
21M
2:03:37
Rank: #480 (+15)
20M → 21M
6:20 | 6:20/mi
35K· 21.75 mi
2:08:02
Rank: #478 (+2)
21M → 35K
4:25 | 5:54/mi
23M
2:15:42
Rank: #461 (+17)
35K → 23M
7:40 | 6:07/mi
24M
2:21:42
Rank: #456 (+5)
23M → 24M
6:00 | 6:00/mi
40K· 24.85 mi
2:26:50
Rank: #446 (+10)
24M → 40K
5:08 | 6:00/mi
25.2M
2:29:05
Rank: #441 (+5)
40K → 25.2M
2:15 | 6:31/mi
Finish· 26.22 mi
2:34:58
Rank: #432 (+9)
25.2M → Finish
5:53 | 5:46/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
Time1:16:30
Pace5:50 /mi
2nd Half
Distance13.11 mi
Time1:18:28
Pace5:59 /mi
📊Positive Split: 2.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:18:1918:105:5118:10
5:51
-
10K
6.21 mi10:36:2636:175:5018:07
5:50
-0:01
15K
9.32 mi10:54:3154:225:5018:05
5:49
-0:01
20K
12.43 mi11:12:401:12:315:5018:09
5:51
+0:02
Half
13.11 mi11:16:391:16:305:503:59
5:50
-0:01
25K
15.53 mi11:30:491:30:405:5014:10
5:51
+0:01
30K
18.64 mi11:49:211:49:125:5118:32
5:58
+0:07
20M
20.00 mi11:57:261:57:175:528:05
5:57
-0:01
21M
21.00 mi12:03:462:03:375:536:20
6:20
+0:23
35K
21.75 mi12:08:112:08:025:534:25
5:54
-0:26
23M
23.00 mi12:15:512:15:425:547:40
6:07
+0:13
24M
24.00 mi12:21:512:21:425:546:00
6:00
-0:07
40K
24.85 mi12:26:592:26:505:545:08
6:00
0:00
25.2M
25.20 mi12:29:142:29:055:552:15
6:31
+0:31
Finish
26.22 mi12:35:072:34:585:555:53
5:46
-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

5:46 /mi

Average Pace

5:55 /mi

Slowest Pace

6:31 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:32:43

99% of race

Time at Steady Pace

2:15

1% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 5:55 /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 mi10:18:1918:105:5118:10
5:51
#704
10K
6.21 mi10:36:2636:175:5018:07
5:50
#665
15K
9.32 mi10:54:3154:225:5018:05
5:49
#624
20K
12.43 mi11:12:401:12:315:5018:09
5:51
#588
Half
13.11 mi11:16:391:16:305:503:59
5:50
#589
25K
15.53 mi11:30:491:30:405:5014:10
5:51
#561
30K
18.64 mi11:49:211:49:125:5118:32
5:58
#522
20M
20.00 mi11:57:261:57:175:528:05
5:57
#495
21M
21.00 mi12:03:462:03:375:536:20
6:20
#480
35K
21.75 mi12:08:112:08:025:534:25
5:54
#478
23M
23.00 mi12:15:512:15:425:547:40
6:07
#461
24M
24.00 mi12:21:512:21:425:546:00
6:00
#456
40K
24.85 mi12:26:592:26:505:545:08
6:00
#446
25.2M
25.20 mi12:29:142:29:055:552:15
6:31
#441
Finish
26.22 mi12:35:072:34:585:555:53
5:46
#432
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi704654654558(Top 2%)520(Top 3%)520(Top 9%)
10K6.21 mi3.10 mi665+39619+35619+35665(Top 2%)621(Top 4%)621(Top 11%)
15K9.32 mi3.11 mi624+41579+40579+40558(Top 2%)520(Top 3%)520(Top 9%)
20K12.43 mi3.11 mi588+36544+35544+35499(Top 2%)461(Top 3%)461(Top 8%)
Half13.11 mi0.68 mi589-1545-1545-1644(Top 2%)601(Top 4%)601(Top 11%)
25K15.53 mi2.42 mi561+28516+29516+29476(Top 2%)443(Top 3%)443(Top 8%)
30K18.64 mi3.11 mi522+39477+39477+39449(Top 2%)416(Top 3%)416(Top 7%)
20M20.00 mi1.36 mi495+27456+21456+21325(Top 1%)301(Top 2%)301(Top 5%)
21M21.00 mi1.00 mi480+15443+13443+13406(Top 1%)382(Top 2%)382(Top 7%)
35K21.75 mi0.75 mi478+2438+5438+5521(Top 2%)485(Top 3%)485(Top 9%)
23M23.00 mi1.25 mi461+17423+15423+15520(Top 2%)490(Top 3%)490(Top 9%)
24M24.00 mi1.00 mi456+5419+4419+4573(Top 2%)536(Top 3%)536(Top 10%)
40K24.85 mi0.85 mi446+10411+8411+8391(Top 1%)363(Top 2%)363(Top 6%)
25.2M25.20 mi0.35 mi441+5406+5406+5471(Top 2%)436(Top 3%)436(Top 8%)
Finish26.22 mi1.02 mi432+9396+10396+10460(Top 2%)431(Top 3%)431(Top 8%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 2%
×21stories
+97ft-345ft

Overall

558

Males

520

M18-39

520

5K→10K

3.1 - 6.2 mi

Top 2%
×5stories
+79ft-138ft

Overall

665

Males

621

M18-39

621

10K→15K

6.2 - 9.3 mi

Top 2%
×3stories
+67ft-78ft

Overall

558

Males

520

M18-39

520

15K→20K

9.3 - 12.4 mi

Top 2%
×5stories
+106ft-86ft

Overall

499

Males

461

M18-39

461

20K→Half

12.4 - 13.1 mi

Top 2%
×2stories
+19ft-37ft

Overall

644

Males

601

M18-39

601

Half→25K

13.1 - 15.5 mi

Top 2%
×4stories
+66ft-88ft

Overall

476

Males

443

M18-39

443

25K→30K

15.5 - 18.6 mi

Top 2%
×9stories
+181ft-148ft

Overall

449

Males

416

M18-39

416

30K→20M

18.6 - 20.0 mi

Top 1%
×5stories
+64ft-50ft

Overall

325

Males

301

M18-39

301

20M→21M

20.0 - 21.0 mi

Top 1%
×8stories
+106ft-24ft

Overall

406

Males

382

M18-39

382

21M→35K

21.0 - 21.8 mi

Top 2%
×7stories
+17ft-86ft

Overall

521

Males

485

M18-39

485

35K→23M

21.8 - 23.0 mi

Top 2%
×5stories
+23ft-63ft

Overall

520

Males

490

M18-39

490

23M→24M

23.0 - 24.0 mi

Top 2%
×6stories
+12ft-82ft

Overall

573

Males

536

M18-39

536

24M→40K

24.0 - 24.9 mi

Top 1%
×1story
+6ft-20ft

Overall

391

Males

363

M18-39

363

40K→25.2M

24.9 - 25.2 mi

Top 2%
×1story
+13ft-16ft

Overall

471

Males

436

M18-39

436

25.2M→Finish

25.2 - 26.2 mi

Top 2%
×2stories
+22ft-21ft

Overall

460

Males

431

M18-39

431

Passing Analysis

Category:
Athletes Passed
347
Passed By
75
Net Change
+272
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#704
5K → 10K5314+39#704#665
10K → 15K454+41#665#624
15K → 20K415+36#624#588
20K → Half45-1#588#589
Half → 25K346+28#589#561
25K → 30K467+39#561#522
30K → 20M270+27#522#495
20M → 21M205+15#495#480
21M → 35K97+2#480#478
35K → 23M214+17#478#461
23M → 24M138+5#461#456
24M → 40K144+10#456#446
40K → 25.2M72+5#446#441
25.2M → Finish134+9#441#432
TOTALS34775+272
📊

Passing Visuals

Category:

📈Position Graph

Loading...

🎨Heatmap Timeline

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