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BOSTON MARATHON 2025

Justin Costanza

Bib: 1796•M

NJ

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 3%
Gender (Male)
#0 / 16105
Top 5%
Division (M18-39)
#0 / 5642
Top 12%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
18:55
Rank: #1373
Start → 5K
18:55 | 6:05/mi
10K· 6.21 mi
37:48
Rank: #1360 (+13)
5K → 10K
18:53 | 6:05/mi
15K· 9.32 mi
56:41
Rank: #1320 (+40)
10K → 15K
18:53 | 6:05/mi
20K· 12.43 mi
1:15:35
Rank: #1242 (+78)
15K → 20K
18:54 | 6:05/mi
Half· 13.11 mi
1:19:43
Rank: #1248 (-6)
20K → Half
4:08 | 6:03/mi
25K· 15.53 mi
1:34:37
Rank: #1242 (+6)
Half → 25K
14:54 | 6:09/mi
30K· 18.64 mi
1:53:58
Rank: #1166 (+76)
25K → 30K
19:21 | 6:14/mi
20M
2:02:23
Rank: #1100 (+66)
30K → 20M
8:25 | 6:12/mi
21M
2:08:54
Rank: #1054 (+46)
20M → 21M
6:31 | 6:31/mi
35K· 21.75 mi
2:13:27
Rank: #1032 (+22)
21M → 35K
4:33 | 6:05/mi
23M
2:21:10
Rank: #969 (+63)
35K → 23M
7:43 | 6:10/mi
24M
2:27:09
Rank: #945 (+24)
23M → 24M
5:59 | 5:59/mi
40K· 24.85 mi
2:32:27
Rank: #921 (+24)
24M → 40K
5:18 | 6:12/mi
25.2M
2:34:45
Rank: #909 (+12)
40K → 25.2M
2:18 | 6:40/mi
Finish· 26.22 mi
2:40:37
Rank: #860 (+49)
25.2M → Finish
5:52 | 5:45/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:19:43
Pace6:05 /mi
2nd Half
Distance13.11 mi
Time1:20:54
Pace6:10 /mi
📊Positive Split: 1.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:20:0218:556:0518:55
6:05
-
10K
6.21 mi10:38:5537:486:0518:53
6:05
0:00
15K
9.32 mi10:57:4856:416:0518:53
6:05
0:00
20K
12.43 mi11:16:421:15:356:0518:54
6:05
0:00
Half
13.11 mi11:20:501:19:436:054:08
6:03
-0:02
25K
15.53 mi11:35:441:34:376:0514:54
6:09
+0:06
30K
18.64 mi11:55:051:53:586:0719:21
6:14
+0:05
20M
20.00 mi12:03:302:02:236:078:25
6:12
-0:02
21M
21.00 mi12:10:012:08:546:086:31
6:31
+0:19
35K
21.75 mi12:14:342:13:276:084:33
6:05
-0:26
23M
23.00 mi12:22:172:21:106:087:43
6:10
+0:05
24M
24.00 mi12:28:162:27:096:085:59
5:59
-0:11
40K
24.85 mi12:33:342:32:276:085:18
6:12
+0:13
25.2M
25.20 mi12:35:522:34:456:082:18
6:40
+0:28
Finish
26.22 mi12:41:442:40:376:085:52
5:45
-0:55

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

5:45 /mi

Average Pace

6:08 /mi

Slowest Pace

6:40 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:31:48

95% of race

Time at Steady Pace

8:49

5% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:08 /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 mi10:20:0218:556:0518:55
6:05
#1373
10K
6.21 mi10:38:5537:486:0518:53
6:05
#1360
15K
9.32 mi10:57:4856:416:0518:53
6:05
#1320
20K
12.43 mi11:16:421:15:356:0518:54
6:05
#1242
Half
13.11 mi11:20:501:19:436:054:08
6:03
#1248
25K
15.53 mi11:35:441:34:376:0514:54
6:09
#1242
30K
18.64 mi11:55:051:53:586:0719:21
6:14
#1166
20M
20.00 mi12:03:302:02:236:078:25
6:12
#1100
21M
21.00 mi12:10:012:08:546:086:31
6:31
#1054
35K
21.75 mi12:14:342:13:276:084:33
6:05
#1032
23M
23.00 mi12:22:172:21:106:087:43
6:10
#969
24M
24.00 mi12:28:162:27:096:085:59
5:59
#945
40K
24.85 mi12:33:342:32:276:085:18
6:12
#921
25.2M
25.20 mi12:35:522:34:456:082:18
6:40
#909
Finish
26.22 mi12:41:442:40:376:085:52
5:45
#860
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi1373130513051280(Top 5%)1215(Top 8%)1215(Top 22%)
10K6.21 mi3.10 mi1360+131293+121293+121387(Top 5%)1316(Top 8%)1316(Top 23%)
15K9.32 mi3.11 mi1320+401255+381255+381280(Top 5%)1215(Top 8%)1215(Top 22%)
20K12.43 mi3.11 mi1242+781176+791176+791106(Top 4%)1042(Top 6%)1042(Top 18%)
Half13.11 mi0.68 mi1248-61180-41180-41332(Top 5%)1264(Top 8%)1264(Top 22%)
25K15.53 mi2.42 mi1242+61175+51175+51256(Top 4%)1189(Top 7%)1189(Top 21%)
30K18.64 mi3.11 mi1166+761101+741101+74991(Top 3%)931(Top 6%)931(Top 17%)
20M20.00 mi1.36 mi1100+661037+641037+64714(Top 3%)673(Top 4%)673(Top 12%)
21M21.00 mi1.00 mi1054+46993+44993+44717(Top 3%)678(Top 4%)678(Top 12%)
35K21.75 mi0.75 mi1032+22971+22971+22904(Top 3%)849(Top 5%)849(Top 15%)
23M23.00 mi1.25 mi969+63911+60911+60601(Top 2%)566(Top 4%)566(Top 10%)
24M24.00 mi1.00 mi945+24888+23888+23554(Top 2%)518(Top 3%)518(Top 9%)
40K24.85 mi0.85 mi921+24864+24864+24720(Top 3%)675(Top 4%)675(Top 12%)
25.2M25.20 mi0.35 mi909+12852+12852+12705(Top 2%)655(Top 4%)655(Top 12%)
Finish26.22 mi1.02 mi860+49803+49803+49444(Top 2%)417(Top 3%)417(Top 7%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 5%
×21stories
+97ft-345ft

Overall

1280

Males

1215

M18-39

1215

5K→10K

3.1 - 6.2 mi

Top 5%
×5stories
+79ft-138ft

Overall

1387

Males

1316

M18-39

1316

10K→15K

6.2 - 9.3 mi

Top 5%
×3stories
+67ft-78ft

Overall

1280

Males

1215

M18-39

1215

15K→20K

9.3 - 12.4 mi

Top 4%
×5stories
+106ft-86ft

Overall

1106

Males

1042

M18-39

1042

20K→Half

12.4 - 13.1 mi

Top 5%
×2stories
+19ft-37ft

Overall

1332

Males

1264

M18-39

1264

Half→25K

13.1 - 15.5 mi

Top 4%
×4stories
+66ft-88ft

Overall

1256

Males

1189

M18-39

1189

25K→30K

15.5 - 18.6 mi

Top 3%
×9stories
+181ft-148ft

Overall

991

Males

931

M18-39

931

30K→20M

18.6 - 20.0 mi

Top 3%
×5stories
+64ft-50ft

Overall

714

Males

673

M18-39

673

20M→21M

20.0 - 21.0 mi

Top 3%
×8stories
+106ft-24ft

Overall

717

Males

678

M18-39

678

21M→35K

21.0 - 21.8 mi

Top 3%
×7stories
+17ft-86ft

Overall

904

Males

849

M18-39

849

35K→23M

21.8 - 23.0 mi

Top 2%
×5stories
+23ft-63ft

Overall

601

Males

566

M18-39

566

23M→24M

23.0 - 24.0 mi

Top 2%
×6stories
+12ft-82ft

Overall

554

Males

518

M18-39

518

24M→40K

24.0 - 24.9 mi

Top 3%
×1story
+6ft-20ft

Overall

720

Males

675

M18-39

675

40K→25.2M

24.9 - 25.2 mi

Top 2%
×1story
+13ft-16ft

Overall

705

Males

655

M18-39

655

25.2M→Finish

25.2 - 26.2 mi

Top 2%
×2stories
+22ft-21ft

Overall

444

Males

417

M18-39

417

Passing Analysis

Category:
Athletes Passed
706
Passed By
193
Net Change
+513
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#1373
5K → 10K7360+13#1373#1360
10K → 15K6828+40#1360#1320
15K → 20K9113+78#1320#1242
20K → Half814-6#1242#1248
Half → 25K3731+6#1248#1242
25K → 30K9418+76#1242#1166
30K → 20M693+66#1166#1100
20M → 21M515+46#1100#1054
21M → 35K275+22#1054#1032
35K → 23M663+63#1032#969
23M → 24M273+24#969#945
24M → 40K306+24#945#921
40K → 25.2M142+12#921#909
25.2M → Finish512+49#909#860
TOTALS706193+513
📊

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