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BOSTON MARATHON 2025

Yu Pei Chiu

Bib: 16228•F

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

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
26:07
Rank: #19352
Start → 5K
26:07 | 8:24/mi
10K· 6.21 mi
53:10
Rank: #20174 (-822)
5K → 10K
27:03 | 8:42/mi
15K· 9.32 mi
1:20:45
Rank: #20554 (-380)
10K → 15K
27:35 | 8:53/mi
20K· 12.43 mi
1:48:17
Rank: #20488 (+66)
15K → 20K
27:32 | 8:52/mi
Half· 13.11 mi
1:54:11
Rank: #20459 (+29)
20K → Half
5:54 | 8:39/mi
25K· 15.53 mi
2:15:16
Rank: #20106 (+353)
Half → 25K
21:05 | 8:42/mi
30K· 18.64 mi
2:42:42
Rank: #19482 (+624)
25K → 30K
27:26 | 8:50/mi
20M
2:54:37
Rank: #19176 (+306)
30K → 20M
11:55 | 8:46/mi
21M
3:03:46
Rank: #18911 (+265)
20M → 21M
9:09 | 9:09/mi
35K· 21.75 mi
3:10:04
Rank: #18764 (+147)
21M → 35K
6:18 | 8:25/mi
23M
3:20:53
Rank: #18482 (+282)
35K → 23M
10:49 | 8:38/mi
24M
3:29:18
Rank: #18267 (+215)
23M → 24M
8:25 | 8:25/mi
40K· 24.85 mi
3:36:32
Rank: #18084 (+183)
24M → 40K
7:14 | 8:28/mi
25.2M
3:39:43
Rank: #18007 (+77)
40K → 25.2M
3:11 | 9:14/mi
Finish· 26.22 mi
3:48:05
Rank: #17861 (+146)
25.2M → Finish
8:22 | 8:13/mi

The Course

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Half Splits

1st Half· via Half⚖️ Balanced
Distance13.11 mi
Time1:54:11
Pace8:43 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:53:54
Pace8:41 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:59:2726:078:2426:07
8:24
-
10K
6.21 mi11:26:3053:108:3327:03
8:42
+0:18
15K
9.32 mi11:54:051:20:458:4027:35
8:53
+0:11
20K
12.43 mi12:21:371:48:178:4327:32
8:52
-0:01
Half
13.11 mi12:27:311:54:118:435:54
8:39
-0:13
25K
15.53 mi12:48:362:15:168:4221:05
8:42
+0:03
30K
18.64 mi13:16:022:42:428:4427:26
8:50
+0:08
20M
20.00 mi13:27:572:54:378:4411:55
8:46
-0:04
21M
21.00 mi13:37:063:03:468:459:09
9:09
+0:23
35K
21.75 mi13:43:243:10:048:446:18
8:25
-0:44
23M
23.00 mi13:54:133:20:538:4410:49
8:38
+0:13
24M
24.00 mi14:02:383:29:188:438:25
8:25
-0:13
40K
24.85 mi14:09:523:36:328:437:14
8:28
+0:03
25.2M
25.20 mi14:13:033:39:438:433:11
9:14
+0:46
Finish
26.22 mi14:21:253:48:058:428:22
8:13
-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

8:13 /mi

Average Pace

8:42 /mi

Slowest Pace

9:14 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:35:45

95% of race

Time at Steady Pace

12:20

5% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:42 /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 mi10:59:2726:078:2426:07
8:24
#19352
10K
6.21 mi11:26:3053:108:3327:03
8:42
#20174
15K
9.32 mi11:54:051:20:458:4027:35
8:53
#20554
20K
12.43 mi12:21:371:48:178:4327:32
8:52
#20488
Half
13.11 mi12:27:311:54:118:435:54
8:39
#20459
25K
15.53 mi12:48:362:15:168:4221:05
8:42
#20106
30K
18.64 mi13:16:022:42:428:4427:26
8:50
#19482
20M
20.00 mi13:27:572:54:378:4411:55
8:46
#19176
21M
21.00 mi13:37:063:03:468:459:09
9:09
#18911
35K
21.75 mi13:43:243:10:048:446:18
8:25
#18764
23M
23.00 mi13:54:133:20:538:4410:49
8:38
#18482
24M
24.00 mi14:02:383:29:188:438:25
8:25
#18267
40K
24.85 mi14:09:523:36:328:437:14
8:28
#18084
25.2M
25.20 mi14:13:033:39:438:433:11
9:14
#18007
Finish
26.22 mi14:21:253:48:058:428:22
8:13
#17861
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi193527112711221451(Top 76%)8246(Top 67%)8246(Top 151%)
10K6.21 mi3.10 mi20174-8227578-4667578-46620904(Top 74%)7966(Top 65%)7966(Top 146%)
15K9.32 mi3.11 mi20554-3807783-2057783-20521451(Top 76%)8246(Top 67%)8246(Top 151%)
20K12.43 mi3.11 mi20488+667752+317752+3120283(Top 71%)7635(Top 62%)7635(Top 140%)
Half13.11 mi0.68 mi20459+297740+127740+1220065(Top 71%)7505(Top 61%)7505(Top 137%)
25K15.53 mi2.42 mi20106+3537545+1957545+19518367(Top 65%)6632(Top 54%)6632(Top 121%)
30K18.64 mi3.11 mi19482+6247231+3147231+31416792(Top 59%)5919(Top 48%)5919(Top 108%)
20M20.00 mi1.36 mi19176+3067078+1537078+15315514(Top 55%)5322(Top 44%)5322(Top 97%)
21M21.00 mi1.00 mi18911+2656956+1226956+12214390(Top 51%)4844(Top 40%)4844(Top 89%)
35K21.75 mi0.75 mi18764+1476888+686888+6815065(Top 53%)5282(Top 43%)5282(Top 97%)
23M23.00 mi1.25 mi18482+2826753+1356753+13514220(Top 50%)4923(Top 40%)4923(Top 90%)
24M24.00 mi1.00 mi18267+2156663+906663+9014042(Top 49%)4861(Top 40%)4861(Top 89%)
40K24.85 mi0.85 mi18084+1836589+746589+7413239(Top 47%)4584(Top 37%)4584(Top 84%)
25.2M25.20 mi0.35 mi18007+776559+306559+3013218(Top 47%)4637(Top 38%)4637(Top 85%)
Finish26.22 mi1.02 mi17861+1466495+646495+6414382(Top 51%)5155(Top 42%)5155(Top 94%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 76%
×21stories
+97ft-345ft

Overall

21451

Females

8246

F18-39

8246

5K→10K

3.1 - 6.2 mi

Top 74%
×5stories
+79ft-138ft

Overall

20904

Females

7966

F18-39

7966

10K→15K

6.2 - 9.3 mi

Top 76%
×3stories
+67ft-78ft

Overall

21451

Females

8246

F18-39

8246

15K→20K

9.3 - 12.4 mi

Top 71%
×5stories
+106ft-86ft

Overall

20283

Females

7635

F18-39

7635

20K→Half

12.4 - 13.1 mi

Top 71%
×2stories
+19ft-37ft

Overall

20065

Females

7505

F18-39

7505

Half→25K

13.1 - 15.5 mi

Top 65%
×4stories
+66ft-88ft

Overall

18367

Females

6632

F18-39

6632

25K→30K

15.5 - 18.6 mi

Top 59%
×9stories
+181ft-148ft

Overall

16792

Females

5919

F18-39

5919

30K→20M

18.6 - 20.0 mi

Top 55%
×5stories
+64ft-50ft

Overall

15514

Females

5322

F18-39

5322

20M→21M

20.0 - 21.0 mi

Top 51%
×8stories
+106ft-24ft

Overall

14390

Females

4844

F18-39

4844

21M→35K

21.0 - 21.8 mi

Top 53%
×7stories
+17ft-86ft

Overall

15065

Females

5282

F18-39

5282

35K→23M

21.8 - 23.0 mi

Top 50%
×5stories
+23ft-63ft

Overall

14220

Females

4923

F18-39

4923

23M→24M

23.0 - 24.0 mi

Top 49%
×6stories
+12ft-82ft

Overall

14042

Females

4861

F18-39

4861

24M→40K

24.0 - 24.9 mi

Top 47%
×1story
+6ft-20ft

Overall

13239

Females

4584

F18-39

4584

40K→25.2M

24.9 - 25.2 mi

Top 47%
×1story
+13ft-16ft

Overall

13218

Females

4637

F18-39

4637

25.2M→Finish

25.2 - 26.2 mi

Top 51%
×2stories
+22ft-21ft

Overall

14382

Females

5155

F18-39

5155

Passing Analysis

Category:
Athletes Passed
3083
Passed By
1592
Net Change
+1491
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#19352
5K → 10K50872-822#19352#20174
10K → 15K93473-380#20174#20554
15K → 20K215149+66#20554#20488
20K → Half4819+29#20488#20459
Half → 25K37825+353#20459#20106
25K → 30K63612+624#20106#19482
30K → 20M3082+306#19482#19176
20M → 21M2694+265#19176#18911
21M → 35K1492+147#18911#18764
35K → 23M2864+282#18764#18482
23M → 24M2205+215#18482#18267
24M → 40K1863+183#18267#18084
40K → 25.2M814+77#18084#18007
25.2M → Finish16418+146#18007#17861
TOTALS30831592+1491
📊

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