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BOSTON MARATHON 2025

Yu Nung Yu

Bib: 18245•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
26:32
Rank: #20144
Start → 5K
8:32/mi
26:32 split
10K· 6.21 mi
53:28
Rank: #20417 (-273)
5K → 10K
8:40/mi
26:56 split
15K· 9.32 mi
1:20:41
Rank: #20517 (-100)
10K → 15K
8:46/mi
27:13 split
20K· 12.43 mi
1:48:04
Rank: #20396 (+121)
15K → 20K
8:49/mi
27:23 split
Half· 13.11 mi
1:54:07
Rank: #20436 (-40)
20K → Half
8:52/mi
6:03 split
25K· 15.53 mi
2:15:12
Rank: #20079 (+357)
Half → 25K
8:42/mi
21:05 split
30K· 18.64 mi
2:43:36
Rank: #19732 (+347)
25K → 30K
9:08/mi
28:24 split
20M
2:55:45
Rank: #19497 (+235)
30K → 20M
8:56/mi
12:09 split
21M
3:05:05
Rank: #19250 (+247)
20M → 21M
9:20/mi
9:20 split
35K· 21.75 mi
3:11:27
Rank: #19134 (+116)
21M → 35K
8:31/mi
6:22 split
23M
3:22:46
Rank: #18967 (+167)
35K → 23M
9:02/mi
11:19 split
24M
3:31:43
Rank: #18883 (+84)
23M → 24M
8:57/mi
8:57 split
40K· 24.85 mi
3:39:13
Rank: #18746 (+137)
24M → 40K
8:46/mi
7:30 split
25.2M
3:42:32
Rank: #18672 (+74)
40K → 25.2M
9:37/mi
3:19 split
Finish· 26.22 mi
3:51:03
Rank: #18551 (+121)
25.2M → Finish
8:21/mi
8:31 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:54:07
Pace8:42 /mi
2nd Half
Distance13.11 mi
Time1:56:56
Pace8:55 /mi
📊Positive Split: 2.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:19:3226:328:3226:32
8:32
-
10K
6.21 mi11:46:2853:288:3626:56
8:40
+0:08
15K
9.32 mi12:13:411:20:418:3927:13
8:46
+0:06
20K
12.43 mi12:41:041:48:048:4227:23
8:49
+0:03
Half
13.11 mi12:47:071:54:078:426:03
8:52
+0:03
25K
15.53 mi13:08:122:15:128:4221:05
8:42
-0:10
30K
18.64 mi13:36:362:43:368:4728:24
9:08
+0:26
20M
20.00 mi13:48:452:55:458:4712:09
8:56
-0:12
21M
21.00 mi13:58:053:05:058:499:20
9:20
+0:24
35K
21.75 mi14:04:273:11:278:486:22
8:31
-0:49
23M
23.00 mi14:15:463:22:468:4911:19
9:02
+0:31
24M
24.00 mi14:24:433:31:438:498:57
8:57
-0:05
40K
24.85 mi14:32:133:39:138:497:30
8:46
-0:11
25.2M
25.20 mi14:35:323:42:328:503:19
9:37
+0:51
Finish
26.22 mi14:44:033:51:038:498:31
8:21
-1:16

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

8:21 /mi

Average Pace

8:49 /mi

Slowest Pace

9:37 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:38:24

95% of race

Time at Steady Pace

12:39

5% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:49 /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 mi11:19:3226:328:3226:32
8:32
#20144
10K
6.21 mi11:46:2853:288:3626:56
8:40
#20417
15K
9.32 mi12:13:411:20:418:3927:13
8:46
#20517
20K
12.43 mi12:41:041:48:048:4227:23
8:49
#20396
Half
13.11 mi12:47:071:54:078:426:03
8:52
#20436
25K
15.53 mi13:08:122:15:128:4221:05
8:42
#20079
30K
18.64 mi13:36:362:43:368:4728:24
9:08
#19732
20M
20.00 mi13:48:452:55:458:4712:09
8:56
#19497
21M
21.00 mi13:58:053:05:058:499:20
9:20
#19250
35K
21.75 mi14:04:273:11:278:486:22
8:31
#19134
23M
23.00 mi14:15:463:22:468:4911:19
9:02
#18967
24M
24.00 mi14:24:433:31:438:498:57
8:57
#18883
40K
24.85 mi14:32:133:39:138:497:30
8:46
#18746
25.2M
25.20 mi14:35:323:42:328:503:19
9:37
#18672
Finish
26.22 mi14:44:033:51:038:498:31
8:21
#18551
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi201447585758520815(Top 73%)7892(Top 65%)7892(Top 144%)
10K6.21 mi3.10 mi20417-2737723-1387723-13820710(Top 73%)7865(Top 64%)7865(Top 144%)
15K9.32 mi3.11 mi20517-1007761-387761-3820815(Top 73%)7892(Top 65%)7892(Top 144%)
20K12.43 mi3.11 mi20396+1217699+627699+6220007(Top 70%)7481(Top 61%)7481(Top 137%)
Half13.11 mi0.68 mi20436-407728-297728-2921235(Top 75%)8149(Top 67%)8149(Top 149%)
25K15.53 mi2.42 mi20079+3577531+1977531+19718375(Top 65%)6640(Top 54%)6640(Top 121%)
30K18.64 mi3.11 mi19732+3477372+1597372+15918365(Top 65%)6768(Top 55%)6768(Top 124%)
20M20.00 mi1.36 mi19497+2357264+1087264+10816510(Top 58%)5891(Top 48%)5891(Top 108%)
21M21.00 mi1.00 mi19250+2477146+1187146+11815353(Top 54%)5383(Top 44%)5383(Top 98%)
35K21.75 mi0.75 mi19134+1167091+557091+5515589(Top 55%)5579(Top 46%)5579(Top 102%)
23M23.00 mi1.25 mi18967+1677031+607031+6016509(Top 58%)6180(Top 51%)6180(Top 113%)
24M24.00 mi1.00 mi18883+847008+237008+2317140(Top 60%)6575(Top 54%)6575(Top 120%)
40K24.85 mi0.85 mi18746+1376961+476961+4715082(Top 53%)5577(Top 46%)5577(Top 102%)
25.2M25.20 mi0.35 mi18672+746933+286933+2815283(Top 54%)5724(Top 47%)5724(Top 105%)
Finish26.22 mi1.02 mi18551+1216879+546879+5415332(Top 54%)5665(Top 46%)5665(Top 104%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 73%
×21stories
+97ft-345ft

Overall

20815

Females

7892

F18-39

7892

5K→10K

3.1 - 6.2 mi

Top 73%
×5stories
+79ft-138ft

Overall

20710

Females

7865

F18-39

7865

10K→15K

6.2 - 9.3 mi

Top 73%
×3stories
+67ft-78ft

Overall

20815

Females

7892

F18-39

7892

15K→20K

9.3 - 12.4 mi

Top 70%
×5stories
+106ft-86ft

Overall

20007

Females

7481

F18-39

7481

20K→Half

12.4 - 13.1 mi

Top 75%
×2stories
+19ft-37ft

Overall

21235

Females

8149

F18-39

8149

Half→25K

13.1 - 15.5 mi

Top 65%
×4stories
+66ft-88ft

Overall

18375

Females

6640

F18-39

6640

25K→30K

15.5 - 18.6 mi

Top 65%
×9stories
+181ft-148ft

Overall

18365

Females

6768

F18-39

6768

30K→20M

18.6 - 20.0 mi

Top 58%
×5stories
+64ft-50ft

Overall

16510

Females

5891

F18-39

5891

20M→21M

20.0 - 21.0 mi

Top 54%
×8stories
+106ft-24ft

Overall

15353

Females

5383

F18-39

5383

21M→35K

21.0 - 21.8 mi

Top 55%
×7stories
+17ft-86ft

Overall

15589

Females

5579

F18-39

5579

35K→23M

21.8 - 23.0 mi

Top 58%
×5stories
+23ft-63ft

Overall

16509

Females

6180

F18-39

6180

23M→24M

23.0 - 24.0 mi

Top 60%
×6stories
+12ft-82ft

Overall

17140

Females

6575

F18-39

6575

24M→40K

24.0 - 24.9 mi

Top 53%
×1story
+6ft-20ft

Overall

15082

Females

5577

F18-39

5577

40K→25.2M

24.9 - 25.2 mi

Top 54%
×1story
+13ft-16ft

Overall

15283

Females

5724

F18-39

5724

25.2M→Finish

25.2 - 26.2 mi

Top 54%
×2stories
+22ft-21ft

Overall

15332

Females

5665

F18-39

5665

Passing Analysis

Category:
Athletes Passed
2640
Passed By
1047
Net Change
+1593
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#20144
5K → 10K163436-273#20144#20417
10K → 15K151251-100#20417#20517
15K → 20K238117+121#20517#20396
20K → Half1656-40#20396#20436
Half → 25K38629+357#20436#20079
25K → 30K41265+347#20079#19732
30K → 20M24510+235#19732#19497
20M → 21M2536+247#19497#19250
21M → 35K1226+116#19250#19134
35K → 23M18316+167#19134#18967
23M → 24M11127+84#18967#18883
24M → 40K14811+137#18883#18746
40K → 25.2M784+74#18746#18672
25.2M → Finish13413+121#18672#18551
TOTALS26401047+1593
📊

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