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BOSTON MARATHON 2025

Karen Chiang

Bib: 13106•F

MO

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 41%
Gender (Female)
#0 / 12228
Top 25%
Masters (Masters Women)
#0 / 6759
Top 11%
Division (F40-44)
#0 / 1718
Top 24%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
7:50/mi
24:21
↑ 97↓ 3451.5%
10K· 6.21 mi
7:43/mi
48:20
↑ 79↓ 1380.4%
15K· 9.32 mi
7:41/mi
1:12:13
↑ 67↓ 78
20K· 12.43 mi
7:40/mi
1:36:03
↑ 106↓ 860.1%
Half· 13.11 mi
7:40/mi
1:41:17
↑ 19↓ 370.5%
25K· 15.53 mi
7:42/mi
1:59:56
↑ 66↓ 880.2%
30K· 18.64 mi
7:54/mi
2:24:28
↑ 181↓ 1480.2%
20M
7:54/mi
2:35:12
↑ 64↓ 500.2%
21M
8:13/mi
2:43:25
↑ 106↓ 241.6%
35K· 21.75 mi
7:52/mi
2:49:18
↑ 17↓ 861.7%
23M
7:50/mi
2:59:07
↑ 23↓ 630.6%
24M
7:43/mi
3:06:50
↓ 821.3%
40K· 24.85 mi
8:08/mi
3:13:47
↓ 200.3%
25.2M
8:30/mi
3:16:43
↑ 13↓ 160.2%
Finish· 26.22 mi
7:57/mi
3:24:49
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:41:17
Pace7:44 /mi
2nd Half
Distance13.11 mi
Time1:43:32
Pace7:54 /mi
📊Positive Split: 2.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:57:4524:217:5024:21
7:50
-
10K
6.21 mi11:21:4448:207:4723:59
7:43
-0:07
15K
9.32 mi11:45:371:12:137:4523:53
7:41
-0:02
20K
12.43 mi12:09:271:36:037:4423:50
7:40
-0:01
Half
13.11 mi12:14:411:41:177:445:14
7:40
0:00
25K
15.53 mi12:33:201:59:567:4318:39
7:42
+0:02
30K
18.64 mi12:57:522:24:287:4524:32
7:54
+0:12
20M
20.00 mi13:08:362:35:127:4610:44
7:54
0:00
21M
21.00 mi13:16:492:43:257:478:13
8:13
+0:19
35K
21.75 mi13:22:422:49:187:475:53
7:52
-0:21
23M
23.00 mi13:32:312:59:077:479:49
7:50
-0:02
24M
24.00 mi13:40:143:06:507:477:43
7:43
-0:07
40K
24.85 mi13:47:113:13:477:486:57
8:08
+0:25
25.2M
25.20 mi13:50:073:16:437:482:56
8:30
+0:22
Finish
26.22 mi13:58:133:24:497:498:06
7:57
-0:33

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

7:40 /mi

Average Pace

7:49 /mi

Slowest Pace

8:30 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:21:53

99% of race

Time at Steady Pace

2:56

1% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:49 /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 mi10:57:4524:217:5024:21
7:50
#15151
10K
6.21 mi11:21:4448:207:4723:59
7:43
#14570
15K
9.32 mi11:45:371:12:137:4523:53
7:41
#14184
20K
12.43 mi12:09:271:36:037:4423:50
7:40
#13608
Half
13.11 mi12:14:411:41:177:445:14
7:40
#13583
25K
15.53 mi12:33:201:59:567:4318:39
7:42
#13199
30K
18.64 mi12:57:522:24:287:4524:32
7:54
#12660
20M
20.00 mi13:08:362:35:127:4610:44
7:54
#12409
21M
21.00 mi13:16:492:43:257:478:13
8:13
#12141
35K
21.75 mi13:22:422:49:187:475:53
7:52
#12106
23M
23.00 mi13:32:312:59:077:479:49
7:50
#11879
24M
24.00 mi13:40:143:06:507:477:43
7:43
#11728
40K
24.85 mi13:47:113:13:477:486:57
8:08
#11664
25.2M
25.20 mi13:50:073:16:437:482:56
8:30
#11599
Finish
26.22 mi13:58:133:24:497:498:06
7:57
#11624
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi151514621462113380(Top 47%)3666(Top 30%)3666(Top 213%)
10K6.21 mi3.10 mi14570+5814275+3464275+34614075(Top 50%)3996(Top 33%)3996(Top 233%)
15K9.32 mi3.11 mi14184+3864079+1964079+19613380(Top 47%)3666(Top 30%)3666(Top 213%)
20K12.43 mi3.11 mi13608+5763788+2913788+29112158(Top 43%)3082(Top 25%)3082(Top 179%)
Half13.11 mi0.68 mi13583+253780+83780+813186(Top 46%)3586(Top 29%)3586(Top 209%)
25K15.53 mi2.42 mi13199+3843592+1883592+18811501(Top 40%)2850(Top 23%)2850(Top 166%)
30K18.64 mi3.11 mi12660+5393357+2353357+23510621(Top 37%)2610(Top 21%)2610(Top 152%)
20M20.00 mi1.36 mi12409+2513259+983259+989766(Top 34%)2342(Top 19%)2342(Top 136%)
21M21.00 mi1.00 mi12141+2683149+1103149+1108726(Top 31%)2053(Top 17%)2053(Top 119%)
35K21.75 mi0.75 mi12106+353158-93158-911330(Top 40%)3282(Top 27%)3282(Top 191%)
23M23.00 mi1.25 mi11879+2273077+813077+818909(Top 31%)2219(Top 18%)2219(Top 129%)
24M24.00 mi1.00 mi11728+1513040+373040+379261(Top 33%)2459(Top 20%)2459(Top 143%)
40K24.85 mi0.85 mi11664+643031+93031+911113(Top 39%)3458(Top 28%)3458(Top 201%)
25.2M25.20 mi0.35 mi11599+653010+213010+218911(Top 31%)2495(Top 20%)2495(Top 145%)
Finish26.22 mi1.02 mi11624-253067-573067-5712551(Top 44%)4208(Top 34%)4208(Top 245%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 47%
×21story building
+97ft-345ft

Overall

13380

Females

3666

F40-44

3666

5K→10K

3.1 - 6.2 mi

Top 50%
×5story building
+79ft-138ft

Overall

14075

Females

3996

F40-44

3996

10K→15K

6.2 - 9.3 mi

Top 47%
×3story building
+67ft-78ft

Overall

13380

Females

3666

F40-44

3666

15K→20K

9.3 - 12.4 mi

Top 43%
×5story building
+106ft-86ft

Overall

12158

Females

3082

F40-44

3082

20K→Half

12.4 - 13.1 mi

Top 46%
×2story building
+19ft-37ft

Overall

13186

Females

3586

F40-44

3586

Half→25K

13.1 - 15.5 mi

Top 40%
×4story building
+66ft-88ft

Overall

11501

Females

2850

F40-44

2850

25K→30K

15.5 - 18.6 mi

Top 37%
×9story building
+181ft-148ft

Overall

10621

Females

2610

F40-44

2610

30K→20M

18.6 - 20.0 mi

Top 34%
×5story building
+64ft-50ft

Overall

9766

Females

2342

F40-44

2342

20M→21M

20.0 - 21.0 mi

Top 31%
×8story building
+106ft-24ft

Overall

8726

Females

2053

F40-44

2053

21M→35K

21.0 - 21.8 mi

Top 40%
×7story building
+17ft-86ft

Overall

11330

Females

3282

F40-44

3282

35K→23M

21.8 - 23.0 mi

Top 31%
×5story building
+23ft-63ft

Overall

8909

Females

2219

F40-44

2219

23M→24M

23.0 - 24.0 mi

Top 33%
×6story building
+12ft-82ft

Overall

9261

Females

2459

F40-44

2459

24M→40K

24.0 - 24.9 mi

Top 39%
×1story
+6ft-20ft

Overall

11113

Females

3458

F40-44

3458

40K→25.2M

24.9 - 25.2 mi

Top 31%
×1story
+13ft-16ft

Overall

8911

Females

2495

F40-44

2495

25.2M→Finish

25.2 - 26.2 mi

Top 44%
×2story building
+22ft-21ft

Overall

12551

Females

4208

F40-44

4208

Passing Analysis

Category:
Athletes Passed
3994
Passed By
467
Net Change
+3527
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#15151
5K → 10K682101+581#15151#14570
10K → 15K43347+386#14570#14184
15K → 20K58913+576#14184#13608
20K → Half4621+25#13608#13583
Half → 25K39713+384#13583#13199
25K → 30K56829+539#13199#12660
30K → 20M26211+251#12660#12409
20M → 21M2768+268#12409#12141
21M → 35K7742+35#12141#12106
35K → 23M24013+227#12106#11879
23M → 24M16514+151#11879#11728
24M → 40K11046+64#11728#11664
40K → 25.2M672+65#11664#11599
25.2M → Finish82107-25#11599#11624
TOTALS3994467+3527
📊

Passing Visuals

Category:
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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