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BOSTON MARATHON 2025

Shih-Hao Chan

Bib: 13926•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M50-54)
#0 / 1996
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
8:01/mi
24:55
↑ 97↓ 3451.5%
10K· 6.21 mi
9:10/mi
53:23
↑ 79↓ 1380.4%
15K· 9.32 mi
9:38/mi
1:23:18
↑ 67↓ 78
20K· 12.43 mi
9:45/mi
1:53:36
↑ 106↓ 860.1%
Half· 13.11 mi
9:05/mi
1:59:48
↑ 19↓ 370.5%
25K· 15.53 mi
10:28/mi
2:25:11
↑ 66↓ 880.2%
30K· 18.64 mi
11:56/mi
3:02:15
↑ 181↓ 1480.2%
20M
11:38/mi
3:18:03
↑ 64↓ 500.2%
21M
12:03/mi
3:30:06
↑ 106↓ 241.6%
35K· 21.75 mi
10:54/mi
3:38:15
↑ 17↓ 861.7%
23M
11:46/mi
3:52:59
↑ 23↓ 630.6%
24M
12:23/mi
4:05:22
↓ 821.3%
40K· 24.85 mi
11:16/mi
4:15:00
↓ 200.3%
25.2M
12:25/mi
4:19:17
↑ 13↓ 160.2%
Finish· 26.22 mi
10:00/mi
4:29:28
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:59:48
Pace9:08 /mi
2nd Half
Distance13.11 mi
Time2:29:40
Pace11:25 /mi
📊Positive Split: 24.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:54:2124:558:0124:55
8:01
-
10K
6.21 mi11:22:4953:238:3528:28
9:10
+1:09
15K
9.32 mi11:52:441:23:188:5629:55
9:38
+0:28
20K
12.43 mi12:23:021:53:369:0830:18
9:45
+0:07
Half
13.11 mi12:29:141:59:489:086:12
9:05
-0:40
25K
15.53 mi12:54:372:25:119:2125:23
10:28
+1:23
30K
18.64 mi13:31:413:02:159:4737:04
11:56
+1:28
20M
20.00 mi13:47:293:18:039:5415:48
11:38
-0:18
21M
21.00 mi13:59:323:30:0610:0012:03
12:03
+0:25
35K
21.75 mi14:07:413:38:1510:028:09
10:54
-1:09
23M
23.00 mi14:22:253:52:5910:0814:44
11:46
+0:52
24M
24.00 mi14:34:484:05:2210:1312:23
12:23
+0:37
40K
24.85 mi14:44:264:15:0010:169:38
11:16
-1:07
25.2M
25.20 mi14:48:434:19:1710:174:17
12:25
+1:09
Finish
26.22 mi14:58:544:29:2810:1710:11
10:00
-2:25

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

8:01 /mi

Average Pace

10:17 /mi

Slowest Pace

12:25 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:09:59

48% of race

Time at Steady Pace

43:10

16% of race

Time at Slower Pace

1:36:19

36% of race

Average Pace: 10:17 /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 mi10:54:2124:558:0124:55
8:01
#16739
10K
6.21 mi11:22:4953:238:3528:28
9:10
#20347
15K
9.32 mi11:52:441:23:188:5629:55
9:38
#22011
20K
12.43 mi12:23:021:53:369:0830:18
9:45
#22531
Half
13.11 mi12:29:141:59:489:086:12
9:05
#22521
25K
15.53 mi12:54:372:25:119:2125:23
10:28
#22939
30K
18.64 mi13:31:413:02:159:4737:04
11:56
#23609
20M
20.00 mi13:47:293:18:039:5415:48
11:38
#23740
21M
21.00 mi13:59:323:30:0610:0012:03
12:03
#23746
35K
21.75 mi14:07:413:38:1510:028:09
10:54
#23755
23M
23.00 mi14:22:253:52:5910:0814:44
11:46
#23825
24M
24.00 mi14:34:484:05:2210:1312:23
12:23
#23977
40K
24.85 mi14:44:264:15:0010:169:38
11:16
#23975
25.2M
25.20 mi14:48:434:19:1710:174:17
12:25
#23991
Finish
26.22 mi14:58:544:29:2810:1710:11
10:00
#23956
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi16739111011110124096(Top 85%)14309(Top 89%)14309(Top 717%)
10K6.21 mi3.10 mi20347-360812610-150912610-150923048(Top 81%)13826(Top 86%)13826(Top 693%)
15K9.32 mi3.11 mi22011-166413342-73213342-73224096(Top 85%)14309(Top 89%)14309(Top 717%)
20K12.43 mi3.11 mi22531-52013594-25213594-25223630(Top 83%)14070(Top 87%)14070(Top 705%)
Half13.11 mi0.68 mi22521+1013586+813586+822174(Top 78%)13419(Top 83%)13419(Top 672%)
25K15.53 mi2.42 mi22939-41813767-18113767-18124313(Top 86%)14331(Top 89%)14331(Top 718%)
30K18.64 mi3.11 mi23609-67014032-26514032-26525494(Top 90%)14757(Top 92%)14757(Top 739%)
20M20.00 mi1.36 mi23740-13114064-3214064-3224749(Top 87%)14346(Top 89%)14346(Top 719%)
21M21.00 mi1.00 mi23746-614054+1014054+1023685(Top 83%)13767(Top 85%)13767(Top 690%)
35K21.75 mi0.75 mi23755-914048+614048+623988(Top 84%)13878(Top 86%)13878(Top 695%)
23M23.00 mi1.25 mi23825-7014059-1114059-1124704(Top 87%)14192(Top 88%)14192(Top 711%)
24M24.00 mi1.00 mi23977-15214121-6214121-6226177(Top 92%)14897(Top 92%)14897(Top 746%)
40K24.85 mi0.85 mi23975+214100+2114100+2123700(Top 83%)13612(Top 85%)13612(Top 682%)
25.2M25.20 mi0.35 mi23991-1614107-714107-724036(Top 85%)13785(Top 86%)13785(Top 691%)
Finish26.22 mi1.02 mi23956+3514074+3314074+3322921(Top 81%)13237(Top 82%)13237(Top 663%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 85%
×21story building
+97ft-345ft

Overall

24096

Males

14309

M50-54

14309

5K→10K

3.1 - 6.2 mi

Top 81%
×5story building
+79ft-138ft

Overall

23048

Males

13826

M50-54

13826

10K→15K

6.2 - 9.3 mi

Top 85%
×3story building
+67ft-78ft

Overall

24096

Males

14309

M50-54

14309

15K→20K

9.3 - 12.4 mi

Top 83%
×5story building
+106ft-86ft

Overall

23630

Males

14070

M50-54

14070

20K→Half

12.4 - 13.1 mi

Top 78%
×2story building
+19ft-37ft

Overall

22174

Males

13419

M50-54

13419

Half→25K

13.1 - 15.5 mi

Top 86%
×4story building
+66ft-88ft

Overall

24313

Males

14331

M50-54

14331

25K→30K

15.5 - 18.6 mi

Top 90%
×9story building
+181ft-148ft

Overall

25494

Males

14757

M50-54

14757

30K→20M

18.6 - 20.0 mi

Top 87%
×5story building
+64ft-50ft

Overall

24749

Males

14346

M50-54

14346

20M→21M

20.0 - 21.0 mi

Top 83%
×8story building
+106ft-24ft

Overall

23685

Males

13767

M50-54

13767

21M→35K

21.0 - 21.8 mi

Top 84%
×7story building
+17ft-86ft

Overall

23988

Males

13878

M50-54

13878

35K→23M

21.8 - 23.0 mi

Top 87%
×5story building
+23ft-63ft

Overall

24704

Males

14192

M50-54

14192

23M→24M

23.0 - 24.0 mi

Top 92%
×6story building
+12ft-82ft

Overall

26177

Males

14897

M50-54

14897

24M→40K

24.0 - 24.9 mi

Top 83%
×1story
+6ft-20ft

Overall

23700

Males

13612

M50-54

13612

40K→25.2M

24.9 - 25.2 mi

Top 85%
×1story
+13ft-16ft

Overall

24036

Males

13785

M50-54

13785

25.2M→Finish

25.2 - 26.2 mi

Top 81%
×2story building
+22ft-21ft

Overall

22921

Males

13237

M50-54

13237

Passing Analysis

Category:
Athletes Passed
534
Passed By
7751
Net Change
-7217
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#16739
5K → 10K23610-3608#16739#20347
10K → 15K171681-1664#20347#22011
15K → 20K69589-520#22011#22531
20K → Half4030+10#22531#22521
Half → 25K51469-418#22521#22939
25K → 30K29699-670#22939#23609
30K → 20M47178-131#23609#23740
20M → 21M7278-6#23740#23746
21M → 35K3443-9#23746#23755
35K → 23M50120-70#23755#23825
23M → 24M12164-152#23825#23977
24M → 40K4745+2#23977#23975
40K → 25.2M622-16#23975#23991
25.2M → Finish5823+35#23991#23956
TOTALS5347751-7217
📊

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