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BOSTON MARATHON 2025

John Destefano

Bib: 27539•M

FL

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

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
9:55/mi
30:49
↑ 97↓ 3451.5%
10K· 6.21 mi
9:20/mi
59:49
↑ 79↓ 1380.4%
15K· 9.32 mi
9:46/mi
1:30:10
↑ 67↓ 78
20K· 12.43 mi
10:00/mi
2:01:14
↑ 106↓ 860.1%
Half· 13.11 mi
10:19/mi
2:08:16
↑ 19↓ 370.5%
25K· 15.53 mi
10:42/mi
2:34:13
↑ 66↓ 880.2%
30K· 18.64 mi
11:39/mi
3:10:24
↑ 181↓ 1480.2%
20M
10:53/mi
3:25:11
↑ 64↓ 500.2%
21M
12:05/mi
3:37:16
↑ 106↓ 241.6%
35K· 21.75 mi
10:35/mi
3:45:11
↑ 17↓ 861.7%
23M
10:28/mi
3:58:17
↑ 23↓ 630.6%
24M
10:19/mi
4:08:36
↓ 821.3%
40K· 24.85 mi
10:35/mi
4:17:39
↓ 200.3%
25.2M
14:01/mi
4:22:29
↑ 13↓ 160.2%
Finish· 26.22 mi
9:06/mi
4:31:45
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:08:16
Pace9:47 /mi
2nd Half
Distance13.11 mi
Time2:23:29
Pace10:57 /mi
📊Positive Split: 11.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:47:4830:499:5530:49
9:55
-
10K
6.21 mi12:16:4859:499:3829:00
9:20
-0:35
15K
9.32 mi12:47:091:30:109:4030:21
9:46
+0:26
20K
12.43 mi13:18:132:01:149:4531:04
10:00
+0:14
Half
13.11 mi13:25:152:08:169:477:02
10:19
+0:19
25K
15.53 mi13:51:122:34:139:5625:57
10:42
+0:23
30K
18.64 mi14:27:233:10:2410:1336:11
11:39
+0:57
20M
20.00 mi14:42:103:25:1110:1614:47
10:53
-0:46
21M
21.00 mi14:54:153:37:1610:2112:05
12:05
+1:12
35K
21.75 mi15:02:103:45:1110:217:55
10:35
-1:30
23M
23.00 mi15:15:163:58:1710:2213:06
10:28
-0:07
24M
24.00 mi15:25:354:08:3610:2210:19
10:19
-0:09
40K
24.85 mi15:34:384:17:3910:229:03
10:35
+0:16
25.2M
25.20 mi15:39:284:22:2910:254:50
14:01
+3:26
Finish
26.22 mi15:48:444:31:4510:229:16
9:06
-4:55

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

9:06 /mi

Average Pace

10:22 /mi

Slowest Pace

14:01 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:08:37

25% of race

Time at Steady Pace

2:30:02

55% of race

Time at Slower Pace

53:06

20% of race

Average Pace: 10:22 /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 mi11:47:4830:499:5530:49
9:55
#25394
10K
6.21 mi12:16:4859:499:3829:00
9:20
#24530
15K
9.32 mi12:47:091:30:109:4030:21
9:46
#24509
20K
12.43 mi13:18:132:01:149:4531:04
10:00
#24430
Half
13.11 mi13:25:152:08:169:477:02
10:19
#24488
25K
15.53 mi13:51:122:34:139:5625:57
10:42
#24564
30K
18.64 mi14:27:233:10:2410:1336:11
11:39
#24680
20M
20.00 mi14:42:103:25:1110:1614:47
10:53
#24602
21M
21.00 mi14:54:153:37:1610:2112:05
12:05
#24561
35K
21.75 mi15:02:103:45:1110:217:55
10:35
#24529
23M
23.00 mi15:15:163:58:1710:2213:06
10:28
#24391
24M
24.00 mi15:25:354:08:3610:2210:19
10:19
#24303
40K
24.85 mi15:34:384:17:3910:229:03
10:35
#24244
25.2M
25.20 mi15:39:284:22:2910:254:50
14:01
#24283
Finish
26.22 mi15:48:444:31:4510:229:16
9:06
#24166
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi25394149051490524474(Top 86%)14472(Top 90%)14472(Top 257%)
10K6.21 mi3.10 mi24530+86414501+40414501+40423631(Top 83%)14088(Top 87%)14088(Top 250%)
15K9.32 mi3.11 mi24509+2114485+1614485+1624474(Top 86%)14472(Top 90%)14472(Top 257%)
20K12.43 mi3.11 mi24430+7914431+5414431+5424213(Top 85%)14312(Top 89%)14312(Top 254%)
Half13.11 mi0.68 mi24488-5814454-2314454-2325464(Top 90%)14867(Top 92%)14867(Top 264%)
25K15.53 mi2.42 mi24564-7614489-3514489-3524718(Top 87%)14514(Top 90%)14514(Top 257%)
30K18.64 mi3.11 mi24680-11614514-2514514-2525060(Top 88%)14556(Top 90%)14556(Top 258%)
20M20.00 mi1.36 mi24602+7814467+4714467+4723334(Top 82%)13683(Top 85%)13683(Top 243%)
21M21.00 mi1.00 mi24561+4114431+3614431+3623736(Top 84%)13791(Top 86%)13791(Top 244%)
35K21.75 mi0.75 mi24529+3214405+2614405+2623337(Top 82%)13557(Top 84%)13557(Top 240%)
23M23.00 mi1.25 mi24391+13814329+7614329+7621925(Top 77%)12846(Top 80%)12846(Top 228%)
24M24.00 mi1.00 mi24303+8814282+4714282+4722294(Top 78%)12953(Top 80%)12953(Top 230%)
40K24.85 mi0.85 mi24244+5914236+4614236+4622149(Top 78%)12817(Top 80%)12817(Top 227%)
25.2M25.20 mi0.35 mi24283-3914255-1914255-1926298(Top 93%)14889(Top 92%)14889(Top 264%)
Finish26.22 mi1.02 mi24166+11714180+7514180+7519497(Top 69%)11590(Top 72%)11590(Top 205%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 86%
×21story building
+97ft-345ft

Overall

24474

Males

14472

M18-39

14472

5K→10K

3.1 - 6.2 mi

Top 83%
×5story building
+79ft-138ft

Overall

23631

Males

14088

M18-39

14088

10K→15K

6.2 - 9.3 mi

Top 86%
×3story building
+67ft-78ft

Overall

24474

Males

14472

M18-39

14472

15K→20K

9.3 - 12.4 mi

Top 85%
×5story building
+106ft-86ft

Overall

24213

Males

14312

M18-39

14312

20K→Half

12.4 - 13.1 mi

Top 90%
×2story building
+19ft-37ft

Overall

25464

Males

14867

M18-39

14867

Half→25K

13.1 - 15.5 mi

Top 87%
×4story building
+66ft-88ft

Overall

24718

Males

14514

M18-39

14514

25K→30K

15.5 - 18.6 mi

Top 88%
×9story building
+181ft-148ft

Overall

25060

Males

14556

M18-39

14556

30K→20M

18.6 - 20.0 mi

Top 82%
×5story building
+64ft-50ft

Overall

23334

Males

13683

M18-39

13683

20M→21M

20.0 - 21.0 mi

Top 84%
×8story building
+106ft-24ft

Overall

23736

Males

13791

M18-39

13791

21M→35K

21.0 - 21.8 mi

Top 82%
×7story building
+17ft-86ft

Overall

23337

Males

13557

M18-39

13557

35K→23M

21.8 - 23.0 mi

Top 77%
×5story building
+23ft-63ft

Overall

21925

Males

12846

M18-39

12846

23M→24M

23.0 - 24.0 mi

Top 78%
×6story building
+12ft-82ft

Overall

22294

Males

12953

M18-39

12953

24M→40K

24.0 - 24.9 mi

Top 78%
×1story
+6ft-20ft

Overall

22149

Males

12817

M18-39

12817

40K→25.2M

24.9 - 25.2 mi

Top 93%
×1story
+13ft-16ft

Overall

26298

Males

14889

M18-39

14889

25.2M→Finish

25.2 - 26.2 mi

Top 69%
×2story building
+22ft-21ft

Overall

19497

Males

11590

M18-39

11590

Passing Analysis

Category:
Athletes Passed
2040
Passed By
812
Net Change
+1228
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#25394
5K → 10K8739+864#25394#24530
10K → 15K149128+21#24530#24509
15K → 20K17091+79#24509#24430
20K → Half1573-58#24430#24488
Half → 25K78154-76#24488#24564
25K → 30K94210-116#24564#24680
30K → 20M9820+78#24680#24602
20M → 21M7534+41#24602#24561
21M → 35K4917+32#24561#24529
35K → 23M1468+138#24529#24391
23M → 24M9911+88#24391#24303
24M → 40K7112+59#24303#24244
40K → 25.2M645-39#24244#24283
25.2M → Finish1170+117#24283#24166
TOTALS2040812+1228
📊

Passing Visuals

Category:
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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