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BOSTON MARATHON 2025

Emily Zhong

Bib: 15218•F

CA

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 42%
Gender (Female)
#0 / 12228
Top 27%
Division (F18-39)
#0 / 5469
Top 45%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
23:41
Rank: #13325
Start → 5K
23:41 | 7:37/mi
10K· 6.21 mi
47:01
Rank: #12723 (+602)
5K → 10K
23:20 | 7:31/mi
15K· 9.32 mi
1:10:35
Rank: #12621 (+102)
10K → 15K
23:34 | 7:35/mi
20K· 12.43 mi
1:36:06
Rank: #13648 (-1027)
15K → 20K
25:31 | 8:13/mi
Half· 13.11 mi
1:41:16
Rank: #13573 (+75)
20K → Half
5:10 | 7:34/mi
25K· 15.53 mi
1:59:57
Rank: #13205 (+368)
Half → 25K
18:41 | 7:42/mi
30K· 18.64 mi
2:25:26
Rank: #13104 (+101)
25K → 30K
25:29 | 8:12/mi
20M
2:36:26
Rank: #12918 (+186)
30K → 20M
11:00 | 8:06/mi
21M
2:45:06
Rank: #12806 (+112)
20M → 21M
8:40 | 8:40/mi
35K· 21.75 mi
2:50:48
Rank: #12649 (+157)
21M → 35K
5:42 | 7:37/mi
23M
3:00:49
Rank: #12456 (+193)
35K → 23M
10:01 | 8:00/mi
24M
3:09:07
Rank: #12479 (-23)
23M → 24M
8:18 | 8:18/mi
40K· 24.85 mi
3:15:47
Rank: #12310 (+169)
24M → 40K
6:40 | 7:48/mi
25.2M
3:18:43
Rank: #12242 (+68)
40K → 25.2M
2:56 | 8:30/mi
Finish· 26.22 mi
3:26:02
Rank: #12009 (+233)
25.2M → Finish
7:19 | 7:11/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:41:16
Pace7:43 /mi
2nd Half
Distance13.11 mi
Time1:44:46
Pace8:00 /mi
📊Positive Split: 3.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:56:0423:417:3723:41
7:37
-
10K
6.21 mi11:19:2447:017:3423:20
7:31
-0:06
15K
9.32 mi11:42:581:10:357:3423:34
7:35
+0:04
20K
12.43 mi12:08:291:36:067:4425:31
8:13
+0:38
Half
13.11 mi12:13:391:41:167:435:10
7:34
-0:39
25K
15.53 mi12:32:201:59:577:4318:41
7:42
+0:08
30K
18.64 mi12:57:492:25:267:4825:29
8:12
+0:30
20M
20.00 mi13:08:492:36:267:4911:00
8:06
-0:06
21M
21.00 mi13:17:292:45:067:528:40
8:40
+0:34
35K
21.75 mi13:23:112:50:487:515:42
7:37
-1:03
23M
23.00 mi13:33:123:00:497:5210:01
8:00
+0:23
24M
24.00 mi13:41:303:09:077:538:18
8:18
+0:18
40K
24.85 mi13:48:103:15:477:536:40
7:48
-0:30
25.2M
25.20 mi13:51:063:18:437:532:56
8:30
+0:42
Finish
26.22 mi13:58:253:26:027:527:19
7:11
-1:19

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

7:11 /mi

Average Pace

7:52 /mi

Slowest Pace

8:40 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

59:23

29% of race

Time at Steady Pace

1:04:45

31% of race

Time at Slower Pace

1:21:54

40% of race

Average Pace: 7:51 /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 mi10:56:0423:417:3723:41
7:37
#13325
10K
6.21 mi11:19:2447:017:3423:20
7:31
#12723
15K
9.32 mi11:42:581:10:357:3423:34
7:35
#12621
20K
12.43 mi12:08:291:36:067:4425:31
8:13
#13648
Half
13.11 mi12:13:391:41:167:435:10
7:34
#13573
25K
15.53 mi12:32:201:59:577:4318:41
7:42
#13205
30K
18.64 mi12:57:492:25:267:4825:29
8:12
#13104
20M
20.00 mi13:08:492:36:267:4911:00
8:06
#12918
21M
21.00 mi13:17:292:45:067:528:40
8:40
#12806
35K
21.75 mi13:23:112:50:487:515:42
7:37
#12649
23M
23.00 mi13:33:123:00:497:5210:01
8:00
#12456
24M
24.00 mi13:41:303:09:077:538:18
8:18
#12479
40K
24.85 mi13:48:103:15:477:536:40
7:48
#12310
25.2M
25.20 mi13:51:063:18:437:532:56
8:30
#12242
Finish
26.22 mi13:58:253:26:027:527:19
7:11
#12009
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi133253503350312481(Top 44%)3155(Top 26%)3155(Top 58%)
10K6.21 mi3.10 mi12723+6023190+3133190+31312211(Top 43%)2936(Top 24%)2936(Top 54%)
15K9.32 mi3.11 mi12621+1023165+253165+2512481(Top 44%)3155(Top 26%)3155(Top 58%)
20K12.43 mi3.11 mi13648-10273808-6433808-64316380(Top 58%)5422(Top 44%)5422(Top 99%)
Half13.11 mi0.68 mi13573+753772+363772+3612415(Top 44%)3182(Top 26%)3182(Top 58%)
25K15.53 mi2.42 mi13205+3683598+1743598+17411613(Top 41%)2917(Top 24%)2917(Top 53%)
30K18.64 mi3.11 mi13104+1013617-193617-1912842(Top 45%)3739(Top 31%)3739(Top 68%)
20M20.00 mi1.36 mi12918+1863539+783539+7811094(Top 39%)2991(Top 24%)2991(Top 55%)
21M21.00 mi1.00 mi12806+1123507+323507+3211499(Top 40%)3354(Top 27%)3354(Top 61%)
35K21.75 mi0.75 mi12649+1573446+613446+619543(Top 34%)2398(Top 20%)2398(Top 44%)
23M23.00 mi1.25 mi12456+1933381+653381+6510063(Top 35%)2775(Top 23%)2775(Top 51%)
24M24.00 mi1.00 mi12479-233410-293410-2913272(Top 47%)4447(Top 36%)4447(Top 81%)
40K24.85 mi0.85 mi12310+1693361+493361+498803(Top 31%)2373(Top 19%)2373(Top 43%)
25.2M25.20 mi0.35 mi12242+683339+223339+228919(Top 31%)2503(Top 20%)2503(Top 46%)
Finish26.22 mi1.02 mi12009+2333252+873252+876966(Top 25%)1643(Top 13%)1643(Top 30%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 44%
×21stories
+97ft-345ft

Overall

12481

Females

3155

F18-39

3155

5K→10K

3.1 - 6.2 mi

Top 43%
×5stories
+79ft-138ft

Overall

12211

Females

2936

F18-39

2936

10K→15K

6.2 - 9.3 mi

Top 44%
×3stories
+67ft-78ft

Overall

12481

Females

3155

F18-39

3155

15K→20K

9.3 - 12.4 mi

Top 58%
×5stories
+106ft-86ft

Overall

16380

Females

5422

F18-39

5422

20K→Half

12.4 - 13.1 mi

Top 44%
×2stories
+19ft-37ft

Overall

12415

Females

3182

F18-39

3182

Half→25K

13.1 - 15.5 mi

Top 41%
×4stories
+66ft-88ft

Overall

11613

Females

2917

F18-39

2917

25K→30K

15.5 - 18.6 mi

Top 45%
×9stories
+181ft-148ft

Overall

12842

Females

3739

F18-39

3739

30K→20M

18.6 - 20.0 mi

Top 39%
×5stories
+64ft-50ft

Overall

11094

Females

2991

F18-39

2991

20M→21M

20.0 - 21.0 mi

Top 40%
×8stories
+106ft-24ft

Overall

11499

Females

3354

F18-39

3354

21M→35K

21.0 - 21.8 mi

Top 34%
×7stories
+17ft-86ft

Overall

9543

Females

2398

F18-39

2398

35K→23M

21.8 - 23.0 mi

Top 35%
×5stories
+23ft-63ft

Overall

10063

Females

2775

F18-39

2775

23M→24M

23.0 - 24.0 mi

Top 47%
×6stories
+12ft-82ft

Overall

13272

Females

4447

F18-39

4447

24M→40K

24.0 - 24.9 mi

Top 31%
×1story
+6ft-20ft

Overall

8803

Females

2373

F18-39

2373

40K→25.2M

24.9 - 25.2 mi

Top 31%
×1story
+13ft-16ft

Overall

8919

Females

2503

F18-39

2503

25.2M→Finish

25.2 - 26.2 mi

Top 25%
×2stories
+22ft-21ft

Overall

6966

Females

1643

F18-39

1643

Passing Analysis

Category:
Athletes Passed
3043
Passed By
1727
Net Change
+1316
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#13325
5K → 10K69290+602#13325#12723
10K → 15K240138+102#12723#12621
15K → 20K421069-1027#12621#13648
20K → Half838+75#13648#13573
Half → 25K38416+368#13573#13205
25K → 30K296195+101#13205#13104
30K → 20M21327+186#13104#12918
20M → 21M15543+112#12918#12806
21M → 35K1658+157#12806#12649
35K → 23M21825+193#12649#12456
23M → 24M6790-23#12456#12479
24M → 40K17910+169#12479#12310
40K → 25.2M724+68#12310#12242
25.2M → Finish2374+233#12242#12009
TOTALS30431727+1316
📊

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