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BOSTON MARATHON 2025

Kin Man Chung

Bib: 20793•F

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 43%
Gender (Female)
#0 / 12228
Top 28%
Masters (Masters Women)
#0 / 6759
Top 13%
Division (F40-44)
#0 / 1718
Top 28%
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
7:52/mi
24:25
↑ 97↓ 3451.5%
10K· 6.21 mi
7:48/mi
48:40
↑ 79↓ 1380.4%
15K· 9.32 mi
7:48/mi
1:12:55
↑ 67↓ 78
20K· 12.43 mi
7:53/mi
1:37:26
↑ 106↓ 860.1%
Half· 13.11 mi
7:48/mi
1:42:45
↑ 19↓ 370.5%
25K· 15.53 mi
7:59/mi
2:02:06
↑ 66↓ 880.2%
30K· 18.64 mi
8:12/mi
2:27:35
↑ 181↓ 1480.2%
20M
8:04/mi
2:38:33
↑ 64↓ 500.2%
21M
8:32/mi
2:47:05
↑ 106↓ 241.6%
35K· 21.75 mi
7:33/mi
2:52:44
↑ 17↓ 861.7%
23M
7:40/mi
3:02:20
↑ 23↓ 630.6%
24M
7:31/mi
3:09:51
↓ 821.3%
40K· 24.85 mi
7:38/mi
3:16:23
↓ 200.3%
25.2M
8:33/mi
3:19:20
↑ 13↓ 160.2%
Finish· 26.22 mi
7:25/mi
3:26:53
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:42:45
Pace7:50 /mi
2nd Half
Distance13.11 mi
Time1:44:08
Pace7:57 /mi
📊Positive Split: 1.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:17:5824:257:5224:25
7:52
-
10K
6.21 mi11:42:1348:407:5024:15
7:48
-0:04
15K
9.32 mi12:06:281:12:557:4924:15
7:48
0:00
20K
12.43 mi12:30:591:37:267:5024:31
7:53
+0:05
Half
13.11 mi12:36:181:42:457:505:19
7:48
-0:05
25K
15.53 mi12:55:392:02:067:5219:21
7:59
+0:11
30K
18.64 mi13:21:082:27:357:5525:29
8:12
+0:13
20M
20.00 mi13:32:062:38:337:5610:58
8:04
-0:08
21M
21.00 mi13:40:382:47:057:578:32
8:32
+0:28
35K
21.75 mi13:46:172:52:447:575:39
7:33
-0:59
23M
23.00 mi13:55:533:02:207:569:36
7:40
+0:07
24M
24.00 mi14:03:243:09:517:557:31
7:31
-0:09
40K
24.85 mi14:09:563:16:237:546:32
7:38
+0:07
25.2M
25.20 mi14:12:533:19:207:552:57
8:33
+0:55
Finish
26.22 mi14:20:263:26:537:547:33
7:25
-1:08

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

7:25 /mi

Average Pace

7:54 /mi

Slowest Pace

8:33 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:49:55

82% of race

Time at Steady Pace

36:58

18% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:53 /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 mi11:17:5824:257:5224:25
7:52
#15326
10K
6.21 mi11:42:1348:407:5024:15
7:48
#15074
15K
9.32 mi12:06:281:12:557:4924:15
7:48
#14834
20K
12.43 mi12:30:591:37:267:5024:31
7:53
#14585
Half
13.11 mi12:36:181:42:457:505:19
7:48
#14558
25K
15.53 mi12:55:392:02:067:5219:21
7:59
#14386
30K
18.64 mi13:21:082:27:357:5525:29
8:12
#14019
20M
20.00 mi13:32:062:38:337:5610:58
8:04
#13738
21M
21.00 mi13:40:382:47:057:578:32
8:32
#13524
35K
21.75 mi13:46:172:52:447:575:39
7:33
#13355
23M
23.00 mi13:55:533:02:207:569:36
7:40
#12983
24M
24.00 mi14:03:243:09:517:557:31
7:31
#12715
40K
24.85 mi14:09:563:16:237:546:32
7:38
#12484
25.2M
25.20 mi14:12:533:19:207:552:57
8:33
#12422
Finish
26.22 mi14:20:263:26:537:547:33
7:25
#12246
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi153264729472914421(Top 51%)4265(Top 35%)4265(Top 248%)
10K6.21 mi3.10 mi15074+2524584+1454584+14514868(Top 52%)4456(Top 36%)4456(Top 259%)
15K9.32 mi3.11 mi14834+2404457+1274457+12714421(Top 51%)4265(Top 35%)4265(Top 248%)
20K12.43 mi3.11 mi14585+2494336+1214336+12114006(Top 49%)4094(Top 33%)4094(Top 238%)
Half13.11 mi0.68 mi14558+274320+164320+1614214(Top 50%)4165(Top 34%)4165(Top 242%)
25K15.53 mi2.42 mi14386+1724265+554265+5513744(Top 48%)4070(Top 33%)4070(Top 237%)
30K18.64 mi3.11 mi14019+3674115+1504115+15012845(Top 45%)3742(Top 31%)3742(Top 218%)
20M20.00 mi1.36 mi13738+2813984+1313984+13110926(Top 38%)2913(Top 24%)2913(Top 170%)
21M21.00 mi1.00 mi13524+2143902+823902+8210723(Top 38%)2971(Top 24%)2971(Top 173%)
35K21.75 mi0.75 mi13355+1693830+723830+729083(Top 32%)2177(Top 18%)2177(Top 127%)
23M23.00 mi1.25 mi12983+3723655+1753655+1757742(Top 27%)1720(Top 14%)1720(Top 100%)
24M24.00 mi1.00 mi12715+2683537+1183537+1187883(Top 28%)1832(Top 15%)1832(Top 107%)
40K24.85 mi0.85 mi12484+2313448+893448+897768(Top 27%)1894(Top 15%)1894(Top 110%)
25.2M25.20 mi0.35 mi12422+623429+193429+199220(Top 32%)2657(Top 22%)2657(Top 155%)
Finish26.22 mi1.02 mi12246+1763378+513378+518606(Top 30%)2353(Top 19%)2353(Top 137%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 51%
×21story building
+97ft-345ft

Overall

14421

Females

4265

F40-44

4265

5K→10K

3.1 - 6.2 mi

Top 52%
×5story building
+79ft-138ft

Overall

14868

Females

4456

F40-44

4456

10K→15K

6.2 - 9.3 mi

Top 51%
×3story building
+67ft-78ft

Overall

14421

Females

4265

F40-44

4265

15K→20K

9.3 - 12.4 mi

Top 49%
×5story building
+106ft-86ft

Overall

14006

Females

4094

F40-44

4094

20K→Half

12.4 - 13.1 mi

Top 50%
×2story building
+19ft-37ft

Overall

14214

Females

4165

F40-44

4165

Half→25K

13.1 - 15.5 mi

Top 48%
×4story building
+66ft-88ft

Overall

13744

Females

4070

F40-44

4070

25K→30K

15.5 - 18.6 mi

Top 45%
×9story building
+181ft-148ft

Overall

12845

Females

3742

F40-44

3742

30K→20M

18.6 - 20.0 mi

Top 38%
×5story building
+64ft-50ft

Overall

10926

Females

2913

F40-44

2913

20M→21M

20.0 - 21.0 mi

Top 38%
×8story building
+106ft-24ft

Overall

10723

Females

2971

F40-44

2971

21M→35K

21.0 - 21.8 mi

Top 32%
×7story building
+17ft-86ft

Overall

9083

Females

2177

F40-44

2177

35K→23M

21.8 - 23.0 mi

Top 27%
×5story building
+23ft-63ft

Overall

7742

Females

1720

F40-44

1720

23M→24M

23.0 - 24.0 mi

Top 28%
×6story building
+12ft-82ft

Overall

7883

Females

1832

F40-44

1832

24M→40K

24.0 - 24.9 mi

Top 27%
×1story
+6ft-20ft

Overall

7768

Females

1894

F40-44

1894

40K→25.2M

24.9 - 25.2 mi

Top 32%
×1story
+13ft-16ft

Overall

9220

Females

2657

F40-44

2657

25.2M→Finish

25.2 - 26.2 mi

Top 30%
×2story building
+22ft-21ft

Overall

8606

Females

2353

F40-44

2353

Passing Analysis

Category:
Athletes Passed
3649
Passed By
569
Net Change
+3080
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#15326
5K → 10K425173+252#15326#15074
10K → 15K32585+240#15074#14834
15K → 20K32677+249#14834#14585
20K → Half5124+27#14585#14558
Half → 25K25078+172#14558#14386
25K → 30K44174+367#14386#14019
30K → 20M2898+281#14019#13738
20M → 21M23117+214#13738#13524
21M → 35K1723+169#13524#13355
35K → 23M3731+372#13355#12983
23M → 24M2724+268#12983#12715
24M → 40K2343+231#12715#12484
40K → 25.2M7311+62#12484#12422
25.2M → Finish18711+176#12422#12246
TOTALS3649569+3080
📊

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