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BOSTON MARATHON 2025

Jennifer Chung

Bib: 11694•F

CA

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 30%
Gender (Female)
#0 / 12228
Top 12%
Division (F18-39)
#0 / 5469
Top 23%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
21:56
Rank: #8318
Start → 5K
21:56 | 7:04/mi
10K· 6.21 mi
43:52
Rank: #8351 (-33)
5K → 10K
21:56 | 7:04/mi
15K· 9.32 mi
1:06:09
Rank: #8455 (-104)
10K → 15K
22:17 | 7:10/mi
20K· 12.43 mi
1:29:24
Rank: #8925 (-470)
15K → 20K
23:15 | 7:29/mi
Half· 13.11 mi
1:34:26
Rank: #9024 (-99)
20K → Half
5:02 | 7:23/mi
25K· 15.53 mi
1:52:34
Rank: #9087 (-63)
Half → 25K
18:08 | 7:29/mi
30K· 18.64 mi
2:16:26
Rank: #9000 (+87)
25K → 30K
23:52 | 7:41/mi
20M
2:26:53
Rank: #8906 (+94)
30K → 20M
10:27 | 7:41/mi
21M
2:35:08
Rank: #8874 (+32)
20M → 21M
8:15 | 8:15/mi
35K· 21.75 mi
2:40:37
Rank: #8791 (+83)
21M → 35K
5:29 | 7:20/mi
23M
2:50:10
Rank: #8632 (+159)
35K → 23M
9:33 | 7:38/mi
24M
2:57:30
Rank: #8482 (+150)
23M → 24M
7:20 | 7:20/mi
40K· 24.85 mi
3:03:57
Rank: #8371 (+111)
24M → 40K
6:27 | 7:33/mi
25.2M
3:06:52
Rank: #8359 (+12)
40K → 25.2M
2:55 | 8:27/mi
Finish· 26.22 mi
3:14:40
Rank: #8439 (-80)
25.2M → Finish
7:48 | 7:39/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:34:26
Pace7:12 /mi
2nd Half
Distance13.11 mi
Time1:40:14
Pace7:39 /mi
📊Positive Split: 6.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:52:1521:567:0421:56
7:04
-
10K
6.21 mi11:14:1143:527:0421:56
7:04
0:00
15K
9.32 mi11:36:281:06:097:0622:17
7:10
+0:06
20K
12.43 mi11:59:431:29:247:1223:15
7:29
+0:19
Half
13.11 mi12:04:451:34:267:125:02
7:23
-0:06
25K
15.53 mi12:22:531:52:347:1518:08
7:29
+0:06
30K
18.64 mi12:46:452:16:267:1923:52
7:41
+0:12
20M
20.00 mi12:57:122:26:537:2110:27
7:41
0:00
21M
21.00 mi13:05:272:35:087:238:15
8:15
+0:34
35K
21.75 mi13:10:562:40:377:235:29
7:20
-0:55
23M
23.00 mi13:20:292:50:107:249:33
7:38
+0:18
24M
24.00 mi13:27:492:57:307:247:20
7:20
-0:18
40K
24.85 mi13:34:163:03:577:246:27
7:33
+0:13
25.2M
25.20 mi13:37:113:06:527:252:55
8:27
+0:54
Finish
26.22 mi13:44:593:14:407:267:48
7:39
-0:48

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

7:04 /mi

Average Pace

7:26 /mi

Slowest Pace

8:27 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:03:30

94% of race

Time at Steady Pace

8:15

4% of race

Time at Slower Pace

2:55

1% of race

Average Pace: 7:25 /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 mi10:52:1521:567:0421:56
7:04
#8318
10K
6.21 mi11:14:1143:527:0421:56
7:04
#8351
15K
9.32 mi11:36:281:06:097:0622:17
7:10
#8455
20K
12.43 mi11:59:431:29:247:1223:15
7:29
#8925
Half
13.11 mi12:04:451:34:267:125:02
7:23
#9024
25K
15.53 mi12:22:531:52:347:1518:08
7:29
#9087
30K
18.64 mi12:46:452:16:267:1923:52
7:41
#9000
20M
20.00 mi12:57:122:26:537:2110:27
7:41
#8906
21M
21.00 mi13:05:272:35:087:238:15
8:15
#8874
35K
21.75 mi13:10:562:40:377:235:29
7:20
#8791
23M
23.00 mi13:20:292:50:107:249:33
7:38
#8632
24M
24.00 mi13:27:492:57:307:247:20
7:20
#8482
40K
24.85 mi13:34:163:03:577:246:27
7:33
#8371
25.2M
25.20 mi13:37:113:06:527:252:55
8:27
#8359
Finish
26.22 mi13:44:593:14:407:267:48
7:39
#8439
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi8318110411048909(Top 31%)1385(Top 11%)1385(Top 25%)
10K6.21 mi3.10 mi8351-331126-221126-228368(Top 29%)1132(Top 9%)1132(Top 21%)
15K9.32 mi3.11 mi8455-1041182-561182-568909(Top 31%)1385(Top 11%)1385(Top 25%)
20K12.43 mi3.11 mi8925-4701385-2031385-20310615(Top 37%)2265(Top 19%)2265(Top 41%)
Half13.11 mi0.68 mi9024-991429-441429-4410690(Top 38%)2255(Top 18%)2255(Top 41%)
25K15.53 mi2.42 mi9087-631489-601489-609800(Top 35%)2010(Top 16%)2010(Top 37%)
30K18.64 mi3.11 mi9000+871513-241513-249078(Top 32%)1871(Top 15%)1871(Top 34%)
20M20.00 mi1.36 mi8906+941496+171496+178290(Top 29%)1654(Top 14%)1654(Top 30%)
21M21.00 mi1.00 mi8874+321520-241520-248908(Top 31%)2113(Top 17%)2113(Top 39%)
35K21.75 mi0.75 mi8791+831503+171503+177452(Top 26%)1474(Top 12%)1474(Top 27%)
23M23.00 mi1.25 mi8632+1591482+211482+217450(Top 26%)1590(Top 13%)1590(Top 29%)
24M24.00 mi1.00 mi8482+1501459+231459+236649(Top 23%)1317(Top 11%)1317(Top 24%)
40K24.85 mi0.85 mi8371+1111450+91450+97080(Top 25%)1582(Top 13%)1582(Top 29%)
25.2M25.20 mi0.35 mi8359+121463-131463-138594(Top 30%)2307(Top 19%)2307(Top 42%)
Finish26.22 mi1.02 mi8439-801516-531516-5310358(Top 36%)3144(Top 26%)3144(Top 57%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 31%
×21stories
+97ft-345ft

Overall

8909

Females

1385

F18-39

1385

5K→10K

3.1 - 6.2 mi

Top 29%
×5stories
+79ft-138ft

Overall

8368

Females

1132

F18-39

1132

10K→15K

6.2 - 9.3 mi

Top 31%
×3stories
+67ft-78ft

Overall

8909

Females

1385

F18-39

1385

15K→20K

9.3 - 12.4 mi

Top 37%
×5stories
+106ft-86ft

Overall

10615

Females

2265

F18-39

2265

20K→Half

12.4 - 13.1 mi

Top 38%
×2stories
+19ft-37ft

Overall

10690

Females

2255

F18-39

2255

Half→25K

13.1 - 15.5 mi

Top 35%
×4stories
+66ft-88ft

Overall

9800

Females

2010

F18-39

2010

25K→30K

15.5 - 18.6 mi

Top 32%
×9stories
+181ft-148ft

Overall

9078

Females

1871

F18-39

1871

30K→20M

18.6 - 20.0 mi

Top 29%
×5stories
+64ft-50ft

Overall

8290

Females

1654

F18-39

1654

20M→21M

20.0 - 21.0 mi

Top 31%
×8stories
+106ft-24ft

Overall

8908

Females

2113

F18-39

2113

21M→35K

21.0 - 21.8 mi

Top 26%
×7stories
+17ft-86ft

Overall

7452

Females

1474

F18-39

1474

35K→23M

21.8 - 23.0 mi

Top 26%
×5stories
+23ft-63ft

Overall

7450

Females

1590

F18-39

1590

23M→24M

23.0 - 24.0 mi

Top 23%
×6stories
+12ft-82ft

Overall

6649

Females

1317

F18-39

1317

24M→40K

24.0 - 24.9 mi

Top 25%
×1story
+6ft-20ft

Overall

7080

Females

1582

F18-39

1582

40K→25.2M

24.9 - 25.2 mi

Top 30%
×1story
+13ft-16ft

Overall

8594

Females

2307

F18-39

2307

25.2M→Finish

25.2 - 26.2 mi

Top 36%
×2stories
+22ft-21ft

Overall

10358

Females

3144

F18-39

3144

Passing Analysis

Category:
Athletes Passed
1721
Passed By
1842
Net Change
-121
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#8318
5K → 10K202235-33#8318#8351
10K → 15K120224-104#8351#8455
15K → 20K65535-470#8455#8925
20K → Half16115-99#8925#9024
Half → 25K136199-63#9024#9087
25K → 30K259172+87#9087#9000
30K → 20M14753+94#9000#8906
20M → 21M11886+32#8906#8874
21M → 35K9613+83#8874#8791
35K → 23M19334+159#8791#8632
23M → 24M16313+150#8632#8482
24M → 40K13019+111#8482#8371
40K → 25.2M4230+12#8371#8359
25.2M → Finish34114-80#8359#8439
TOTALS17211842-121
📊

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