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BOSTON MARATHON 2025

Chau Ying Cheng

Bib: 8918•F

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 20%
Gender (Female)
#0 / 12228
Top 5%
Division (F18-39)
#0 / 5469
Top 10%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:15
Rank: #3984
Start → 5K
20:15 | 6:31/mi
10K· 6.21 mi
40:47
Rank: #4236 (-252)
5K → 10K
20:32 | 6:37/mi
15K· 9.32 mi
1:01:41
Rank: #4534 (-298)
10K → 15K
20:54 | 6:44/mi
20K· 12.43 mi
1:22:58
Rank: #4795 (-261)
15K → 20K
21:17 | 6:51/mi
Half· 13.11 mi
1:27:37
Rank: #4870 (-75)
20K → Half
4:39 | 6:49/mi
25K· 15.53 mi
1:44:08
Rank: #4834 (+36)
Half → 25K
16:31 | 6:49/mi
30K· 18.64 mi
2:06:29
Rank: #5035 (-201)
25K → 30K
22:21 | 7:12/mi
20M
2:16:37
Rank: #5197 (-162)
30K → 20M
10:08 | 7:27/mi
21M
2:24:45
Rank: #5384 (-187)
20M → 21M
8:08 | 8:08/mi
35K· 21.75 mi
2:30:22
Rank: #5483 (-99)
21M → 35K
5:37 | 7:30/mi
23M
2:40:04
Rank: #5555 (-72)
35K → 23M
9:42 | 7:45/mi
24M
2:47:46
Rank: #5639 (-84)
23M → 24M
7:42 | 7:42/mi
40K· 24.85 mi
2:54:23
Rank: #5663 (-24)
24M → 40K
6:37 | 7:44/mi
25.2M
2:57:19
Rank: #5671 (-8)
40K → 25.2M
2:56 | 8:30/mi
Finish· 26.22 mi
3:04:57
Rank: #5748 (-77)
25.2M → Finish
7:38 | 7:29/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:27:37
Pace6:41 /mi
2nd Half
Distance13.11 mi
Time1:37:20
Pace7:25 /mi
📊Positive Split: 11.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:45:2320:156:3120:15
6:31
-
10K
6.21 mi11:05:5540:476:3420:32
6:37
+0:06
15K
9.32 mi11:26:491:01:416:3720:54
6:44
+0:07
20K
12.43 mi11:48:061:22:586:4121:17
6:51
+0:07
Half
13.11 mi11:52:451:27:376:414:39
6:49
-0:02
25K
15.53 mi12:09:161:44:086:4216:31
6:49
0:00
30K
18.64 mi12:31:372:06:296:4722:21
7:12
+0:23
20M
20.00 mi12:41:452:16:376:5010:08
7:27
+0:15
21M
21.00 mi12:49:532:24:456:548:08
8:08
+0:41
35K
21.75 mi12:55:302:30:226:555:37
7:30
-0:38
23M
23.00 mi13:05:122:40:046:589:42
7:45
+0:15
24M
24.00 mi13:12:542:47:466:597:42
7:42
-0:03
40K
24.85 mi13:19:312:54:237:016:37
7:44
+0:02
25.2M
25.20 mi13:22:272:57:197:022:56
8:30
+0:46
Finish
26.22 mi13:30:053:04:577:047:38
7:29
-1:01

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

6:31 /mi

Average Pace

7:04 /mi

Slowest Pace

8:30 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:44:08

56% of race

Time at Steady Pace

1:00:03

32% of race

Time at Slower Pace

20:46

11% of race

Average Pace: 7:03 /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 mi10:45:2320:156:3120:15
6:31
#3984
10K
6.21 mi11:05:5540:476:3420:32
6:37
#4236
15K
9.32 mi11:26:491:01:416:3720:54
6:44
#4534
20K
12.43 mi11:48:061:22:586:4121:17
6:51
#4795
Half
13.11 mi11:52:451:27:376:414:39
6:49
#4870
25K
15.53 mi12:09:161:44:086:4216:31
6:49
#4834
30K
18.64 mi12:31:372:06:296:4722:21
7:12
#5035
20M
20.00 mi12:41:452:16:376:5010:08
7:27
#5197
21M
21.00 mi12:49:532:24:456:548:08
8:08
#5384
35K
21.75 mi12:55:302:30:226:555:37
7:30
#5483
23M
23.00 mi13:05:122:40:046:589:42
7:45
#5555
24M
24.00 mi13:12:542:47:466:597:42
7:42
#5639
40K
24.85 mi13:19:312:54:237:016:37
7:44
#5663
25.2M
25.20 mi13:22:272:57:197:022:56
8:30
#5671
Finish
26.22 mi13:30:053:04:577:047:38
7:29
#5748
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi39842172175360(Top 19%)408(Top 3%)408(Top 7%)
10K6.21 mi3.10 mi4236-252244-27244-274561(Top 16%)280(Top 2%)280(Top 5%)
15K9.32 mi3.11 mi4534-298269-25269-255360(Top 19%)408(Top 3%)408(Top 7%)
20K12.43 mi3.11 mi4795-261313-44313-445802(Top 20%)513(Top 4%)513(Top 9%)
Half13.11 mi0.68 mi4870-75322-9322-96356(Top 22%)618(Top 5%)618(Top 11%)
25K15.53 mi2.42 mi4834+36330-8330-84990(Top 18%)397(Top 3%)397(Top 7%)
30K18.64 mi3.11 mi5035-201385-55385-555877(Top 21%)638(Top 5%)638(Top 12%)
20M20.00 mi1.36 mi5197-162417-32417-326747(Top 24%)1046(Top 9%)1046(Top 19%)
21M21.00 mi1.00 mi5384-187452-35452-358172(Top 29%)1787(Top 15%)1787(Top 33%)
35K21.75 mi0.75 mi5483-99474-22474-228691(Top 31%)1970(Top 16%)1970(Top 36%)
23M23.00 mi1.25 mi5555-72503-29503-298218(Top 29%)1899(Top 16%)1899(Top 35%)
24M24.00 mi1.00 mi5639-84540-37540-379117(Top 32%)2373(Top 19%)2373(Top 43%)
40K24.85 mi0.85 mi5663-24561-21561-218355(Top 29%)2138(Top 17%)2138(Top 39%)
25.2M25.20 mi0.35 mi5671-8570-9570-98832(Top 31%)2416(Top 20%)2416(Top 44%)
Finish26.22 mi1.02 mi5748-77606-36606-369123(Top 32%)2580(Top 21%)2580(Top 47%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 19%
×21stories
+97ft-345ft

Overall

5360

Females

408

F18-39

408

5K→10K

3.1 - 6.2 mi

Top 16%
×5stories
+79ft-138ft

Overall

4561

Females

280

F18-39

280

10K→15K

6.2 - 9.3 mi

Top 19%
×3stories
+67ft-78ft

Overall

5360

Females

408

F18-39

408

15K→20K

9.3 - 12.4 mi

Top 20%
×5stories
+106ft-86ft

Overall

5802

Females

513

F18-39

513

20K→Half

12.4 - 13.1 mi

Top 22%
×2stories
+19ft-37ft

Overall

6356

Females

618

F18-39

618

Half→25K

13.1 - 15.5 mi

Top 18%
×4stories
+66ft-88ft

Overall

4990

Females

397

F18-39

397

25K→30K

15.5 - 18.6 mi

Top 21%
×9stories
+181ft-148ft

Overall

5877

Females

638

F18-39

638

30K→20M

18.6 - 20.0 mi

Top 24%
×5stories
+64ft-50ft

Overall

6747

Females

1046

F18-39

1046

20M→21M

20.0 - 21.0 mi

Top 29%
×8stories
+106ft-24ft

Overall

8172

Females

1787

F18-39

1787

21M→35K

21.0 - 21.8 mi

Top 31%
×7stories
+17ft-86ft

Overall

8691

Females

1970

F18-39

1970

35K→23M

21.8 - 23.0 mi

Top 29%
×5stories
+23ft-63ft

Overall

8218

Females

1899

F18-39

1899

23M→24M

23.0 - 24.0 mi

Top 32%
×6stories
+12ft-82ft

Overall

9117

Females

2373

F18-39

2373

24M→40K

24.0 - 24.9 mi

Top 29%
×1story
+6ft-20ft

Overall

8355

Females

2138

F18-39

2138

40K→25.2M

24.9 - 25.2 mi

Top 31%
×1story
+13ft-16ft

Overall

8832

Females

2416

F18-39

2416

25.2M→Finish

25.2 - 26.2 mi

Top 32%
×2stories
+22ft-21ft

Overall

9123

Females

2580

F18-39

2580

Passing Analysis

Category:
Athletes Passed
670
Passed By
2434
Net Change
-1764
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#3984
5K → 10K60312-252#3984#4236
10K → 15K28326-298#4236#4534
15K → 20K65326-261#4534#4795
20K → Half479-75#4795#4870
Half → 25K12185+36#4870#4834
25K → 30K103304-201#4834#5035
30K → 20M32194-162#5035#5197
20M → 21M35222-187#5197#5384
21M → 35K20119-99#5384#5483
35K → 23M66138-72#5483#5555
23M → 24M27111-84#5555#5639
24M → 40K4771-24#5639#5663
40K → 25.2M2735-8#5663#5671
25.2M → Finish35112-77#5671#5748
TOTALS6702434-1764
📊

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