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BOSTON MARATHON 2025

Josephine Chan

Bib: 18184•F

0:00
0:00
/ mi
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Top 37%
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
24:55
Rank: #16746
Start → 5K
24:55 | 8:01/mi
10K· 6.21 mi
49:35
Rank: #16344 (+402)
5K → 10K
24:40 | 7:56/mi
15K· 9.32 mi
1:14:22
Rank: #16163 (+181)
10K → 15K
24:47 | 7:59/mi
20K· 12.43 mi
1:39:27
Rank: #15944 (+219)
15K → 20K
25:05 | 8:04/mi
Half· 13.11 mi
1:44:53
Rank: #15922 (+22)
20K → Half
5:26 | 7:58/mi
25K· 15.53 mi
2:04:45
Rank: #15806 (+116)
Half → 25K
19:52 | 8:12/mi
30K· 18.64 mi
2:31:09
Rank: #15572 (+234)
25K → 30K
26:24 | 8:30/mi
20M
2:42:52
Rank: #15446 (+126)
30K → 20M
11:43 | 8:37/mi
21M
2:51:56
Rank: #15311 (+135)
20M → 21M
9:04 | 9:04/mi
35K· 21.75 mi
2:58:10
Rank: #15236 (+75)
21M → 35K
6:14 | 8:20/mi
23M
3:08:40
Rank: #15054 (+182)
35K → 23M
10:30 | 8:23/mi
24M
3:16:45
Rank: #14867 (+187)
23M → 24M
8:05 | 8:05/mi
40K· 24.85 mi
3:23:45
Rank: #14726 (+141)
24M → 40K
7:00 | 8:11/mi
25.2M
3:26:52
Rank: #14657 (+69)
40K → 25.2M
3:07 | 9:02/mi
Finish· 26.22 mi
3:34:38
Rank: #14469 (+188)
25.2M → Finish
7:46 | 7:37/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:44:53
Pace8:00 /mi
2nd Half
Distance13.11 mi
Time1:49:45
Pace8:22 /mi
📊Positive Split: 4.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:16:2024:558:0124:55
8:01
-
10K
6.21 mi11:41:0049:357:5924:40
7:56
-0:05
15K
9.32 mi12:05:471:14:227:5924:47
7:59
+0:03
20K
12.43 mi12:30:521:39:278:0025:05
8:04
+0:05
Half
13.11 mi12:36:181:44:538:005:26
7:58
-0:06
25K
15.53 mi12:56:102:04:458:0219:52
8:12
+0:14
30K
18.64 mi13:22:342:31:098:0726:24
8:30
+0:18
20M
20.00 mi13:34:172:42:528:0911:43
8:37
+0:07
21M
21.00 mi13:43:212:51:568:119:04
9:04
+0:27
35K
21.75 mi13:49:352:58:108:126:14
8:20
-0:44
23M
23.00 mi14:00:053:08:408:1210:30
8:23
+0:03
24M
24.00 mi14:08:103:16:458:128:05
8:05
-0:18
40K
24.85 mi14:15:103:23:458:127:00
8:11
+0:06
25.2M
25.20 mi14:18:173:26:528:133:07
9:02
+0:51
Finish
26.22 mi14:26:033:34:388:127:46
7:37
-1:25

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

7:37 /mi

Average Pace

8:12 /mi

Slowest Pace

9:04 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:33:50

72% of race

Time at Steady Pace

48:37

23% of race

Time at Slower Pace

12:11

6% of race

Average Pace: 8:11 /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 mi11:16:2024:558:0124:55
8:01
#16746
10K
6.21 mi11:41:0049:357:5924:40
7:56
#16344
15K
9.32 mi12:05:471:14:227:5924:47
7:59
#16163
20K
12.43 mi12:30:521:39:278:0025:05
8:04
#15944
Half
13.11 mi12:36:181:44:538:005:26
7:58
#15922
25K
15.53 mi12:56:102:04:458:0219:52
8:12
#15806
30K
18.64 mi13:22:342:31:098:0726:24
8:30
#15572
20M
20.00 mi13:34:172:42:528:0911:43
8:37
#15446
21M
21.00 mi13:43:212:51:568:119:04
9:04
#15311
35K
21.75 mi13:49:352:58:108:126:14
8:20
#15236
23M
23.00 mi14:00:053:08:408:1210:30
8:23
#15054
24M
24.00 mi14:08:103:16:458:128:05
8:05
#14867
40K
24.85 mi14:15:103:23:458:127:00
8:11
#14726
25.2M
25.20 mi14:18:173:26:528:133:07
9:02
#14657
Finish
26.22 mi14:26:033:34:388:127:46
7:37
#14469
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi167465594559415875(Top 56%)5077(Top 42%)5077(Top 93%)
10K6.21 mi3.10 mi16344+4025343+2515343+25115992(Top 56%)5115(Top 42%)5115(Top 94%)
15K9.32 mi3.11 mi16163+1815235+1085235+10815875(Top 56%)5077(Top 42%)5077(Top 93%)
20K12.43 mi3.11 mi15944+2195113+1225113+12215460(Top 54%)4891(Top 40%)4891(Top 89%)
Half13.11 mi0.68 mi15922+225103+105103+1015647(Top 55%)4967(Top 41%)4967(Top 91%)
25K15.53 mi2.42 mi15806+1165056+475056+4715288(Top 54%)4890(Top 40%)4890(Top 89%)
30K18.64 mi3.11 mi15572+2344981+754981+7514736(Top 52%)4758(Top 39%)4758(Top 87%)
20M20.00 mi1.36 mi15446+1264947+344947+3414573(Top 51%)4814(Top 39%)4814(Top 88%)
21M21.00 mi1.00 mi15311+1354899+484899+4813923(Top 49%)4592(Top 38%)4592(Top 84%)
35K21.75 mi0.75 mi15236+754871+284871+2814499(Top 51%)4953(Top 41%)4953(Top 91%)
23M23.00 mi1.25 mi15054+1824798+734798+7312616(Top 44%)4065(Top 33%)4065(Top 74%)
24M24.00 mi1.00 mi14867+1874726+724726+7211834(Top 42%)3729(Top 30%)3729(Top 68%)
40K24.85 mi0.85 mi14726+1414678+484678+4811523(Top 41%)3675(Top 30%)3675(Top 67%)
25.2M25.20 mi0.35 mi14657+694645+334645+3312090(Top 43%)4031(Top 33%)4031(Top 74%)
Finish26.22 mi1.02 mi14469+1884573+724573+7210160(Top 36%)3080(Top 25%)3080(Top 56%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 56%
×21stories
+97ft-345ft

Overall

15875

Females

5077

F18-39

5077

5K→10K

3.1 - 6.2 mi

Top 56%
×5stories
+79ft-138ft

Overall

15992

Females

5115

F18-39

5115

10K→15K

6.2 - 9.3 mi

Top 56%
×3stories
+67ft-78ft

Overall

15875

Females

5077

F18-39

5077

15K→20K

9.3 - 12.4 mi

Top 54%
×5stories
+106ft-86ft

Overall

15460

Females

4891

F18-39

4891

20K→Half

12.4 - 13.1 mi

Top 55%
×2stories
+19ft-37ft

Overall

15647

Females

4967

F18-39

4967

Half→25K

13.1 - 15.5 mi

Top 54%
×4stories
+66ft-88ft

Overall

15288

Females

4890

F18-39

4890

25K→30K

15.5 - 18.6 mi

Top 52%
×9stories
+181ft-148ft

Overall

14736

Females

4758

F18-39

4758

30K→20M

18.6 - 20.0 mi

Top 51%
×5stories
+64ft-50ft

Overall

14573

Females

4814

F18-39

4814

20M→21M

20.0 - 21.0 mi

Top 49%
×8stories
+106ft-24ft

Overall

13923

Females

4592

F18-39

4592

21M→35K

21.0 - 21.8 mi

Top 51%
×7stories
+17ft-86ft

Overall

14499

Females

4953

F18-39

4953

35K→23M

21.8 - 23.0 mi

Top 44%
×5stories
+23ft-63ft

Overall

12616

Females

4065

F18-39

4065

23M→24M

23.0 - 24.0 mi

Top 42%
×6stories
+12ft-82ft

Overall

11834

Females

3729

F18-39

3729

24M→40K

24.0 - 24.9 mi

Top 41%
×1story
+6ft-20ft

Overall

11523

Females

3675

F18-39

3675

40K→25.2M

24.9 - 25.2 mi

Top 43%
×1story
+13ft-16ft

Overall

12090

Females

4031

F18-39

4031

25.2M→Finish

25.2 - 26.2 mi

Top 36%
×2stories
+22ft-21ft

Overall

10160

Females

3080

F18-39

3080

Passing Analysis

Category:
Athletes Passed
3036
Passed By
759
Net Change
+2277
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#16746
5K → 10K532130+402#16746#16344
10K → 15K305124+181#16344#16163
15K → 20K30990+219#16163#15944
20K → Half4321+22#15944#15922
Half → 25K226110+116#15922#15806
25K → 30K345111+234#15806#15572
30K → 20M17650+126#15572#15446
20M → 21M17035+135#15446#15311
21M → 35K10530+75#15311#15236
35K → 23M20321+182#15236#15054
23M → 24M1947+187#15054#14867
24M → 40K15110+141#14867#14726
40K → 25.2M7910+69#14726#14657
25.2M → Finish19810+188#14657#14469
TOTALS3036759+2277
📊

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