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BOSTON MARATHON 2025

Chengchun Hou

Bib: 3967•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 28%
Gender (Male)
#0 / 16105
Top 41%
Masters (Masters Men)
#0 / 10463
Top 28%
Division (M40-44)
#0 / 2247
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:41
Rank: #5091
Start → 5K
20:41 | 6:39/mi
10K· 6.21 mi
41:10
Rank: #4702 (+389)
5K → 10K
20:29 | 6:36/mi
15K· 9.32 mi
1:01:53
Rank: #4709 (-7)
10K → 15K
20:43 | 6:40/mi
20K· 12.43 mi
1:23:03
Rank: #4847 (-138)
15K → 20K
21:10 | 6:49/mi
Half· 13.11 mi
1:27:35
Rank: #4844 (+3)
20K → Half
4:32 | 6:39/mi
25K· 15.53 mi
1:44:09
Rank: #4848 (-4)
Half → 25K
16:34 | 6:50/mi
30K· 18.64 mi
2:06:59
Rank: #5269 (-421)
25K → 30K
22:50 | 7:21/mi
20M
2:18:30
Rank: #5908 (-639)
30K → 20M
11:31 | 8:28/mi
21M
2:28:33
Rank: #6529 (-621)
20M → 21M
10:03 | 10:03/mi
35K· 21.75 mi
2:34:39
Rank: #6696 (-167)
21M → 35K
6:06 | 8:09/mi
23M
2:45:23
Rank: #7045 (-349)
35K → 23M
10:44 | 8:34/mi
24M
2:54:12
Rank: #7413 (-368)
23M → 24M
8:49 | 8:49/mi
40K· 24.85 mi
3:01:39
Rank: #7647 (-234)
24M → 40K
7:27 | 8:43/mi
25.2M
3:04:51
Rank: #7727 (-80)
40K → 25.2M
3:12 | 9:17/mi
Finish· 26.22 mi
3:13:05
Rank: #7932 (-205)
25.2M → Finish
8:14 | 8:05/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:27:35
Pace6:41 /mi
2nd Half
Distance13.11 mi
Time1:45:30
Pace8:03 /mi
📊Positive Split: 20.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:22:4620:416:3920:41
6:39
-
10K
6.21 mi10:43:1541:106:3820:29
6:36
-0:03
15K
9.32 mi11:03:581:01:536:3820:43
6:40
+0:04
20K
12.43 mi11:25:081:23:036:4121:10
6:49
+0:09
Half
13.11 mi11:29:401:27:356:414:32
6:39
-0:10
25K
15.53 mi11:46:141:44:096:4216:34
6:50
+0:11
30K
18.64 mi12:09:042:06:596:4922:50
7:21
+0:31
20M
20.00 mi12:20:352:18:306:5511:31
8:28
+1:07
21M
21.00 mi12:30:382:28:337:0410:03
10:03
+1:35
35K
21.75 mi12:36:442:34:397:076:06
8:09
-1:54
23M
23.00 mi12:47:282:45:237:1110:44
8:34
+0:25
24M
24.00 mi12:56:172:54:127:168:49
8:49
+0:15
40K
24.85 mi13:03:443:01:397:197:27
8:43
-0:06
25.2M
25.20 mi13:06:563:04:517:203:12
9:17
+0:34
Finish
26.22 mi13:15:103:13:057:228:14
8:05
-1:12

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

6:36 /mi

Average Pace

7:22 /mi

Slowest Pace

10:03 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:06:59

66% of race

Time at Steady Pace

36:35

19% of race

Time at Slower Pace

29:31

15% of race

Average Pace: 7:22 /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 mi10:22:4620:416:3920:41
6:39
#5091
10K
6.21 mi10:43:1541:106:3820:29
6:36
#4702
15K
9.32 mi11:03:581:01:536:3820:43
6:40
#4709
20K
12.43 mi11:25:081:23:036:4121:10
6:49
#4847
Half
13.11 mi11:29:401:27:356:414:32
6:39
#4844
25K
15.53 mi11:46:141:44:096:4216:34
6:50
#4848
30K
18.64 mi12:09:042:06:596:4922:50
7:21
#5269
20M
20.00 mi12:20:352:18:306:5511:31
8:28
#5908
21M
21.00 mi12:30:382:28:337:0410:03
10:03
#6529
35K
21.75 mi12:36:442:34:397:076:06
8:09
#6696
23M
23.00 mi12:47:282:45:237:1110:44
8:34
#7045
24M
24.00 mi12:56:172:54:127:168:49
8:49
#7413
40K
24.85 mi13:03:443:01:397:197:27
8:43
#7647
25.2M
25.20 mi13:06:563:04:517:203:12
9:17
#7727
Finish
26.22 mi13:15:103:13:057:228:14
8:05
#7932
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi5091475347534811(Top 17%)4492(Top 28%)4492(Top 200%)
10K6.21 mi3.10 mi4702+3894405+3484405+3484431(Top 16%)4156(Top 26%)4156(Top 185%)
15K9.32 mi3.11 mi4709-74408-34408-34811(Top 17%)4492(Top 28%)4492(Top 200%)
20K12.43 mi3.11 mi4847-1384518-1104518-1105432(Top 19%)4979(Top 31%)4979(Top 222%)
Half13.11 mi0.68 mi4844+34515+34515+34870(Top 17%)4530(Top 28%)4530(Top 202%)
25K15.53 mi2.42 mi4848-44508+74508+75153(Top 18%)4728(Top 29%)4728(Top 210%)
30K18.64 mi3.11 mi5269-4214841-3334841-3336752(Top 24%)5821(Top 36%)5821(Top 259%)
20M20.00 mi1.36 mi5908-6395351-5105351-51013583(Top 48%)9246(Top 57%)9246(Top 411%)
21M21.00 mi1.00 mi6529-6215810-4595810-45918462(Top 65%)11366(Top 71%)11366(Top 506%)
35K21.75 mi0.75 mi6696-1675919-1095919-10913233(Top 47%)8889(Top 55%)8889(Top 396%)
23M23.00 mi1.25 mi7045-3496126-2076126-20713717(Top 48%)9018(Top 56%)9018(Top 401%)
24M24.00 mi1.00 mi7413-3686330-2046330-20416368(Top 58%)10183(Top 63%)10183(Top 453%)
40K24.85 mi0.85 mi7647-2346448-1186448-11814651(Top 52%)9269(Top 58%)9269(Top 413%)
25.2M25.20 mi0.35 mi7727-806484-366484-3613258(Top 47%)8564(Top 53%)8564(Top 381%)
Finish26.22 mi1.02 mi7932-2056587-1036587-10313390(Top 47%)8698(Top 54%)8698(Top 387%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 17%
×21stories
+97ft-345ft

Overall

4811

Males

4492

M40-44

4492

5K→10K

3.1 - 6.2 mi

Top 16%
×5stories
+79ft-138ft

Overall

4431

Males

4156

M40-44

4156

10K→15K

6.2 - 9.3 mi

Top 17%
×3stories
+67ft-78ft

Overall

4811

Males

4492

M40-44

4492

15K→20K

9.3 - 12.4 mi

Top 19%
×5stories
+106ft-86ft

Overall

5432

Males

4979

M40-44

4979

20K→Half

12.4 - 13.1 mi

Top 17%
×2stories
+19ft-37ft

Overall

4870

Males

4530

M40-44

4530

Half→25K

13.1 - 15.5 mi

Top 18%
×4stories
+66ft-88ft

Overall

5153

Males

4728

M40-44

4728

25K→30K

15.5 - 18.6 mi

Top 24%
×9stories
+181ft-148ft

Overall

6752

Males

5821

M40-44

5821

30K→20M

18.6 - 20.0 mi

Top 48%
×5stories
+64ft-50ft

Overall

13583

Males

9246

M40-44

9246

20M→21M

20.0 - 21.0 mi

Top 65%
×8stories
+106ft-24ft

Overall

18462

Males

11366

M40-44

11366

21M→35K

21.0 - 21.8 mi

Top 47%
×7stories
+17ft-86ft

Overall

13233

Males

8889

M40-44

8889

35K→23M

21.8 - 23.0 mi

Top 48%
×5stories
+23ft-63ft

Overall

13717

Males

9018

M40-44

9018

23M→24M

23.0 - 24.0 mi

Top 58%
×6stories
+12ft-82ft

Overall

16368

Males

10183

M40-44

10183

24M→40K

24.0 - 24.9 mi

Top 52%
×1story
+6ft-20ft

Overall

14651

Males

9269

M40-44

9269

40K→25.2M

24.9 - 25.2 mi

Top 47%
×1story
+13ft-16ft

Overall

13258

Males

8564

M40-44

8564

25.2M→Finish

25.2 - 26.2 mi

Top 47%
×2stories
+22ft-21ft

Overall

13390

Males

8698

M40-44

8698

Passing Analysis

Category:
Athletes Passed
983
Passed By
3824
Net Change
-2841
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#5091
5K → 10K42435+389#5091#4702
10K → 15K123130-7#4702#4709
15K → 20K82220-138#4709#4847
20K → Half2825+3#4847#4844
Half → 25K104108-4#4844#4848
25K → 30K78499-421#4848#5269
30K → 20M7646-639#5269#5908
20M → 21M5626-621#5908#6529
21M → 35K16183-167#6529#6696
35K → 23M37386-349#6696#7045
23M → 24M14382-368#7045#7413
24M → 40K29263-234#7413#7647
40K → 25.2M1494-80#7647#7727
25.2M → Finish22227-205#7727#7932
TOTALS9833824-2841
📊

Passing Visuals

Category:

📈Position Graph

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🎨Heatmap Timeline

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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