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BOSTON MARATHON 2025

Jennifer Shih

Bib: 8663•F

MA

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 39%
Gender (Female)
#0 / 12228
Top 22%
Division (F18-39)
#0 / 5469
Top 38%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
22:29
Rank: #9817
Start → 5K
22:29 | 7:14/mi
10K· 6.21 mi
44:39
Rank: #9349 (+468)
5K → 10K
22:10 | 7:08/mi
15K· 9.32 mi
1:06:58
Rank: #9209 (+140)
10K → 15K
22:19 | 7:11/mi
20K· 12.43 mi
1:29:21
Rank: #8896 (+313)
15K → 20K
22:23 | 7:12/mi
Half· 13.11 mi
1:34:12
Rank: #8847 (+49)
20K → Half
4:51 | 7:07/mi
25K· 15.53 mi
1:51:45
Rank: #8628 (+219)
Half → 25K
17:33 | 7:14/mi
30K· 18.64 mi
2:15:41
Rank: #8665 (-37)
25K → 30K
23:56 | 7:42/mi
20M
2:26:47
Rank: #8863 (-198)
30K → 20M
11:06 | 8:10/mi
21M
2:36:03
Rank: #9241 (-378)
20M → 21M
9:16 | 9:16/mi
35K· 21.75 mi
2:44:01
Rank: #10107 (-866)
21M → 35K
7:58 | 10:39/mi
23M
2:54:04
Rank: #10087 (+20)
35K → 23M
10:03 | 8:02/mi
24M
3:02:55
Rank: #10413 (-326)
23M → 24M
8:51 | 8:51/mi
40K· 24.85 mi
3:10:54
Rank: #10725 (-312)
24M → 40K
7:59 | 9:20/mi
25.2M
3:14:22
Rank: #10837 (-112)
40K → 25.2M
3:28 | 10:03/mi
Finish· 26.22 mi
3:22:51
Rank: #10984 (-147)
25.2M → Finish
8:29 | 8:19/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:34:12
Pace7:11 /mi
2nd Half
Distance13.11 mi
Time1:48:39
Pace8:17 /mi
📊Positive Split: 15.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:47:5122:297:1422:29
7:14
-
10K
6.21 mi11:10:0144:397:1122:10
7:08
-0:06
15K
9.32 mi11:32:201:06:587:1122:19
7:11
+0:03
20K
12.43 mi11:54:431:29:217:1122:23
7:12
+0:01
Half
13.11 mi11:59:341:34:127:114:51
7:07
-0:05
25K
15.53 mi12:17:071:51:457:1217:33
7:14
+0:07
30K
18.64 mi12:41:032:15:417:1723:56
7:42
+0:28
20M
20.00 mi12:52:092:26:477:2011:06
8:10
+0:28
21M
21.00 mi13:01:252:36:037:269:16
9:16
+1:06
35K
21.75 mi13:09:232:44:017:337:58
10:39
+1:23
23M
23.00 mi13:19:262:54:047:3410:03
8:02
-2:37
24M
24.00 mi13:28:173:02:557:378:51
8:51
+0:49
40K
24.85 mi13:36:163:10:547:417:59
9:20
+0:29
25.2M
25.20 mi13:39:443:14:227:433:28
10:03
+0:43
Finish
26.22 mi13:48:133:22:517:458:29
8:19
-1:44

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

7:07 /mi

Average Pace

7:45 /mi

Slowest Pace

10:39 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:51:45

55% of race

Time at Steady Pace

53:34

26% of race

Time at Slower Pace

37:32

19% of race

Average Pace: 7:44 /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 mi10:47:5122:297:1422:29
7:14
#9817
10K
6.21 mi11:10:0144:397:1122:10
7:08
#9349
15K
9.32 mi11:32:201:06:587:1122:19
7:11
#9209
20K
12.43 mi11:54:431:29:217:1122:23
7:12
#8896
Half
13.11 mi11:59:341:34:127:114:51
7:07
#8847
25K
15.53 mi12:17:071:51:457:1217:33
7:14
#8628
30K
18.64 mi12:41:032:15:417:1723:56
7:42
#8665
20M
20.00 mi12:52:092:26:477:2011:06
8:10
#8863
21M
21.00 mi13:01:252:36:037:269:16
9:16
#9241
35K
21.75 mi13:09:232:44:017:337:58
10:39
#10107
23M
23.00 mi13:19:262:54:047:3410:03
8:02
#10087
24M
24.00 mi13:28:173:02:557:378:51
8:51
#10413
40K
24.85 mi13:36:163:10:547:417:59
9:20
#10725
25.2M
25.20 mi13:39:443:14:227:433:28
10:03
#10837
Finish
26.22 mi13:48:133:22:517:458:29
8:19
#10984
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi9817173017308990(Top 32%)1429(Top 12%)1429(Top 26%)
10K6.21 mi3.10 mi9349+4681522+2081522+2088975(Top 32%)1368(Top 11%)1368(Top 25%)
15K9.32 mi3.11 mi9209+1401485+371485+378990(Top 32%)1429(Top 12%)1429(Top 26%)
20K12.43 mi3.11 mi8896+3131374+1111374+1118265(Top 29%)1220(Top 10%)1220(Top 22%)
Half13.11 mi0.68 mi8847+491361+131361+138450(Top 30%)1288(Top 11%)1288(Top 24%)
25K15.53 mi2.42 mi8628+2191291+701291+707922(Top 28%)1190(Top 10%)1190(Top 22%)
30K18.64 mi3.11 mi8665-371361-701361-709231(Top 32%)1937(Top 16%)1937(Top 35%)
20M20.00 mi1.36 mi8863-1981479-1181479-11811603(Top 41%)3225(Top 26%)3225(Top 59%)
21M21.00 mi1.00 mi9241-3781681-2021681-20214966(Top 53%)5149(Top 42%)5149(Top 94%)
35K21.75 mi0.75 mi10107-8662122-4412122-44123481(Top 83%)9790(Top 80%)9790(Top 179%)
23M23.00 mi1.25 mi10087+202147-252147-2510239(Top 36%)2857(Top 23%)2857(Top 52%)
24M24.00 mi1.00 mi10413-3262340-1932340-19316584(Top 58%)6246(Top 51%)6246(Top 114%)
40K24.85 mi0.85 mi10725-3122536-1962536-19618024(Top 63%)7128(Top 58%)7128(Top 130%)
25.2M25.20 mi0.35 mi10837-1122623-872623-8717266(Top 61%)6716(Top 55%)6716(Top 123%)
Finish26.22 mi1.02 mi10984-1472733-1102733-11015077(Top 53%)5514(Top 45%)5514(Top 101%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 32%
×21stories
+97ft-345ft

Overall

8990

Females

1429

F18-39

1429

5K→10K

3.1 - 6.2 mi

Top 32%
×5stories
+79ft-138ft

Overall

8975

Females

1368

F18-39

1368

10K→15K

6.2 - 9.3 mi

Top 32%
×3stories
+67ft-78ft

Overall

8990

Females

1429

F18-39

1429

15K→20K

9.3 - 12.4 mi

Top 29%
×5stories
+106ft-86ft

Overall

8265

Females

1220

F18-39

1220

20K→Half

12.4 - 13.1 mi

Top 30%
×2stories
+19ft-37ft

Overall

8450

Females

1288

F18-39

1288

Half→25K

13.1 - 15.5 mi

Top 28%
×4stories
+66ft-88ft

Overall

7922

Females

1190

F18-39

1190

25K→30K

15.5 - 18.6 mi

Top 32%
×9stories
+181ft-148ft

Overall

9231

Females

1937

F18-39

1937

30K→20M

18.6 - 20.0 mi

Top 41%
×5stories
+64ft-50ft

Overall

11603

Females

3225

F18-39

3225

20M→21M

20.0 - 21.0 mi

Top 53%
×8stories
+106ft-24ft

Overall

14966

Females

5149

F18-39

5149

21M→35K

21.0 - 21.8 mi

Top 83%
×7stories
+17ft-86ft

Overall

23481

Females

9790

F18-39

9790

35K→23M

21.8 - 23.0 mi

Top 36%
×5stories
+23ft-63ft

Overall

10239

Females

2857

F18-39

2857

23M→24M

23.0 - 24.0 mi

Top 58%
×6stories
+12ft-82ft

Overall

16584

Females

6246

F18-39

6246

24M→40K

24.0 - 24.9 mi

Top 63%
×1story
+6ft-20ft

Overall

18024

Females

7128

F18-39

7128

40K→25.2M

24.9 - 25.2 mi

Top 61%
×1story
+13ft-16ft

Overall

17266

Females

6716

F18-39

6716

25.2M→Finish

25.2 - 26.2 mi

Top 53%
×2stories
+22ft-21ft

Overall

15077

Females

5514

F18-39

5514

Passing Analysis

Category:
Athletes Passed
1918
Passed By
3082
Net Change
-1167
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#9817
5K → 10K54072+468#9817#9349
10K → 15K23393+140#9349#9209
15K → 20K34532+313#9209#8896
20K → Half5910+49#8896#8847
Half → 25K26243+219#8847#8628
25K → 30K191228-37#8628#8665
30K → 20M53251-198#8665#8863
20M → 21M28406-378#8863#9241
21M → 35K3867-866#9241#10107
35K → 23M11292+20#10107#10087
23M → 24M25350-326#10087#10413
24M → 40K19331-312#10413#10725
40K → 25.2M15127-112#10725#10837
25.2M → Finish33180-147#10837#10984
TOTALS19183082-1167
📊

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