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BOSTON MARATHON 2025

David Hu

Bib: 4127•M

MA

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 29%
Gender (Male)
#0 / 16105
Top 42%
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
19:30
Rank: #2300
Start → 5K
19:30 | 6:17/mi
10K· 6.21 mi
39:06
Rank: #2367 (-67)
5K → 10K
19:36 | 6:19/mi
15K· 9.32 mi
58:48
Rank: #2448 (-81)
10K → 15K
19:42 | 6:20/mi
20K· 12.43 mi
1:19:09
Rank: #2666 (-218)
15K → 20K
20:21 | 6:33/mi
Half· 13.11 mi
1:23:33
Rank: #2698 (-32)
20K → Half
4:24 | 6:27/mi
25K· 15.53 mi
1:40:47
Rank: #3297 (-599)
Half → 25K
17:14 | 7:06/mi
30K· 18.64 mi
2:05:15
Rank: #4478 (-1181)
25K → 30K
24:28 | 7:53/mi
20M
2:19:38
Rank: #6268 (-1790)
30K → 20M
14:23 | 10:35/mi
21M
2:28:19
Rank: #6459 (-191)
20M → 21M
8:41 | 8:41/mi
35K· 21.75 mi
2:34:32
Rank: #6668 (-209)
21M → 35K
6:13 | 8:19/mi
23M
2:45:46
Rank: #7155 (-487)
35K → 23M
11:14 | 8:58/mi
24M
2:55:11
Rank: #7702 (-547)
23M → 24M
9:25 | 9:25/mi
40K· 24.85 mi
3:03:04
Rank: #8108 (-406)
24M → 40K
7:53 | 9:13/mi
25.2M
3:06:15
Rank: #8174 (-66)
40K → 25.2M
3:11 | 9:14/mi
Finish· 26.22 mi
3:14:04
Rank: #8246 (-72)
25.2M → Finish
7:49 | 7:40/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:23:33
Pace6:22 /mi
2nd Half
Distance13.11 mi
Time1:50:31
Pace8:26 /mi
📊Positive Split: 32.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:21:4219:306:1719:30
6:17
-
10K
6.21 mi10:41:1839:066:1819:36
6:19
+0:02
15K
9.32 mi11:01:0058:486:1919:42
6:20
+0:01
20K
12.43 mi11:21:211:19:096:2220:21
6:33
+0:13
Half
13.11 mi11:25:451:23:336:224:24
6:27
-0:06
25K
15.53 mi11:42:591:40:476:2917:14
7:06
+0:39
30K
18.64 mi12:07:272:05:156:4324:28
7:53
+0:47
20M
20.00 mi12:21:502:19:386:5914:23
10:35
+2:42
21M
21.00 mi12:30:312:28:197:048:41
8:41
-1:54
35K
21.75 mi12:36:442:34:327:066:13
8:19
-0:22
23M
23.00 mi12:47:582:45:467:1211:14
8:58
+0:39
24M
24.00 mi12:57:232:55:117:189:25
9:25
+0:27
40K
24.85 mi13:05:163:03:047:227:53
9:13
-0:12
25.2M
25.20 mi13:08:273:06:157:233:11
9:14
+0:01
Finish
26.22 mi13:16:163:14:047:247:49
7:40
-1:34

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

6:17 /mi

Average Pace

7:24 /mi

Slowest Pace

10:35 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:40:47

52% of race

Time at Steady Pace

38:30

20% of race

Time at Slower Pace

54:47

28% of race

Average Pace: 7:24 /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 mi10:21:4219:306:1719:30
6:17
#2300
10K
6.21 mi10:41:1839:066:1819:36
6:19
#2367
15K
9.32 mi11:01:0058:486:1919:42
6:20
#2448
20K
12.43 mi11:21:211:19:096:2220:21
6:33
#2666
Half
13.11 mi11:25:451:23:336:224:24
6:27
#2698
25K
15.53 mi11:42:591:40:476:2917:14
7:06
#3297
30K
18.64 mi12:07:272:05:156:4324:28
7:53
#4478
20M
20.00 mi12:21:502:19:386:5914:23
10:35
#6268
21M
21.00 mi12:30:312:28:197:048:41
8:41
#6459
35K
21.75 mi12:36:442:34:327:066:13
8:19
#6668
23M
23.00 mi12:47:582:45:467:1211:14
8:58
#7155
24M
24.00 mi12:57:232:55:117:189:25
9:25
#7702
40K
24.85 mi13:05:163:03:047:227:53
9:13
#8108
25.2M
25.20 mi13:08:273:06:157:233:11
9:14
#8174
Finish
26.22 mi13:16:163:14:047:247:49
7:40
#8246
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi2300219721972596(Top 9%)2479(Top 15%)2479(Top 44%)
10K6.21 mi3.10 mi2367-672258-612258-612483(Top 9%)2373(Top 15%)2373(Top 42%)
15K9.32 mi3.11 mi2448-812338-802338-802596(Top 9%)2479(Top 15%)2479(Top 44%)
20K12.43 mi3.11 mi2666-2182543-2052543-2053428(Top 12%)3247(Top 20%)3247(Top 58%)
Half13.11 mi0.68 mi2698-322574-312574-313426(Top 12%)3252(Top 20%)3252(Top 58%)
25K15.53 mi2.42 mi3297-5993135-5613135-5617026(Top 25%)6139(Top 38%)6139(Top 109%)
30K18.64 mi3.11 mi4478-11814181-10464181-104610439(Top 37%)7897(Top 49%)7897(Top 140%)
20M20.00 mi1.36 mi6268-17905635-14545635-145422638(Top 80%)13352(Top 83%)13352(Top 237%)
21M21.00 mi1.00 mi6459-1915762-1275762-12711535(Top 41%)8128(Top 50%)8128(Top 144%)
35K21.75 mi0.75 mi6668-2095899-1375899-13714248(Top 50%)9379(Top 58%)9379(Top 166%)
23M23.00 mi1.25 mi7155-4876197-2986197-29816079(Top 57%)10097(Top 63%)10097(Top 179%)
24M24.00 mi1.00 mi7702-5476520-3236520-32319276(Top 68%)11530(Top 72%)11530(Top 204%)
40K24.85 mi0.85 mi8108-4066742-2226742-22217406(Top 61%)10544(Top 65%)10544(Top 187%)
25.2M25.20 mi0.35 mi8174-666774-326774-3212992(Top 46%)8437(Top 52%)8437(Top 150%)
Finish26.22 mi1.02 mi8246-726776-26776-210451(Top 37%)7221(Top 45%)7221(Top 128%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 9%
×21stories
+97ft-345ft

Overall

2596

Males

2479

M18-39

2479

5K→10K

3.1 - 6.2 mi

Top 9%
×5stories
+79ft-138ft

Overall

2483

Males

2373

M18-39

2373

10K→15K

6.2 - 9.3 mi

Top 9%
×3stories
+67ft-78ft

Overall

2596

Males

2479

M18-39

2479

15K→20K

9.3 - 12.4 mi

Top 12%
×5stories
+106ft-86ft

Overall

3428

Males

3247

M18-39

3247

20K→Half

12.4 - 13.1 mi

Top 12%
×2stories
+19ft-37ft

Overall

3426

Males

3252

M18-39

3252

Half→25K

13.1 - 15.5 mi

Top 25%
×4stories
+66ft-88ft

Overall

7026

Males

6139

M18-39

6139

25K→30K

15.5 - 18.6 mi

Top 37%
×9stories
+181ft-148ft

Overall

10439

Males

7897

M18-39

7897

30K→20M

18.6 - 20.0 mi

Top 80%
×5stories
+64ft-50ft

Overall

22638

Males

13352

M18-39

13352

20M→21M

20.0 - 21.0 mi

Top 41%
×8stories
+106ft-24ft

Overall

11535

Males

8128

M18-39

8128

21M→35K

21.0 - 21.8 mi

Top 50%
×7stories
+17ft-86ft

Overall

14248

Males

9379

M18-39

9379

35K→23M

21.8 - 23.0 mi

Top 57%
×5stories
+23ft-63ft

Overall

16079

Males

10097

M18-39

10097

23M→24M

23.0 - 24.0 mi

Top 68%
×6stories
+12ft-82ft

Overall

19276

Males

11530

M18-39

11530

24M→40K

24.0 - 24.9 mi

Top 61%
×1story
+6ft-20ft

Overall

17406

Males

10544

M18-39

10544

40K→25.2M

24.9 - 25.2 mi

Top 46%
×1story
+13ft-16ft

Overall

12992

Males

8437

M18-39

8437

25.2M→Finish

25.2 - 26.2 mi

Top 37%
×2stories
+22ft-21ft

Overall

10451

Males

7221

M18-39

7221

Passing Analysis

Category:
Athletes Passed
327
Passed By
6273
Net Change
-5946
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#2300
5K → 10K74141-67#2300#2367
10K → 15K59140-81#2367#2448
15K → 20K23241-218#2448#2666
20K → Half840-32#2666#2698
Half → 25K10609-599#2698#3297
25K → 30K101191-1181#3297#4478
30K → 20M11791-1790#4478#6268
20M → 21M23214-191#6268#6459
21M → 35K16225-209#6459#6668
35K → 23M22509-487#6668#7155
23M → 24M6553-547#7155#7702
24M → 40K15421-406#7702#8108
40K → 25.2M1278-66#8108#8174
25.2M → Finish48120-72#8174#8246
TOTALS3276273-5946
📊

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