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BOSTON MARATHON 2025

Shih-Yueh Chang

Bib: 19770•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M60-64)
#0 / 1259
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
26:56
Rank: #20861
Start → 5K
8:40/mi
26:56 split
10K· 6.21 mi
55:24
Rank: #22031 (-1170)
5K → 10K
9:10/mi
28:28 split
15K· 9.32 mi
1:22:56
Rank: #21803 (+228)
10K → 15K
8:52/mi
27:32 split
20K· 12.43 mi
1:54:42
Rank: #22911 (-1108)
15K → 20K
10:13/mi
31:46 split
Half· 13.11 mi
2:02:15
Rank: #23194 (-283)
20K → Half
11:04/mi
7:33 split
25K· 15.53 mi
2:28:39
Rank: #23603 (-409)
Half → 25K
10:53/mi
26:24 split
30K· 18.64 mi
3:05:16
Rank: #24066 (-463)
25K → 30K
11:47/mi
36:37 split
20M
3:21:49
Rank: #24234 (-168)
30K → 20M
12:11/mi
16:33 split
21M
3:39:06
Rank: #24740 (-506)
20M → 21M
17:17/mi
17:17 split
35K· 21.75 mi
3:49:33
Rank: #24922 (-182)
21M → 35K
13:58/mi
10:27 split
23M
4:05:27
Rank: #25024 (-102)
35K → 23M
12:42/mi
15:54 split
24M
4:16:10
Rank: #24964 (+60)
23M → 24M
10:43/mi
10:43 split
40K· 24.85 mi
4:25:23
Rank: #24892 (+72)
24M → 40K
10:47/mi
9:13 split
25.2M
4:29:21
Rank: #24867 (+25)
40K → 25.2M
11:30/mi
3:58 split
Finish· 26.22 mi
4:40:03
Rank: #24854 (+13)
25.2M → Finish
10:30/mi
10:42 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:02:15
Pace9:20 /mi
2nd Half
Distance13.11 mi
Time2:37:48
Pace12:02 /mi
📊Positive Split: 29.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:26:5326:568:4026:56
8:40
-
10K
6.21 mi11:55:2155:248:5528:28
9:10
+0:30
15K
9.32 mi12:22:531:22:568:5427:32
8:52
-0:18
20K
12.43 mi12:54:391:54:429:1431:46
10:13
+1:21
Half
13.11 mi13:02:122:02:159:207:33
11:04
+0:51
25K
15.53 mi13:28:362:28:399:3426:24
10:53
-0:11
30K
18.64 mi14:05:133:05:169:5636:37
11:47
+0:54
20M
20.00 mi14:21:463:21:4910:0516:33
12:11
+0:24
21M
21.00 mi14:39:033:39:0610:2617:17
17:17
+5:06
35K
21.75 mi14:49:303:49:3310:3310:27
13:58
-3:19
23M
23.00 mi15:05:244:05:2710:4015:54
12:42
-1:16
24M
24.00 mi15:16:074:16:1010:4010:43
10:43
-1:59
40K
24.85 mi15:25:204:25:2310:419:13
10:47
+0:04
25.2M
25.20 mi15:29:184:29:2110:413:58
11:30
+0:43
Finish
26.22 mi15:40:004:40:0310:4110:42
10:30
-1:00

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

8:40 /mi

Average Pace

10:41 /mi

Slowest Pace

17:17 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:22:56

30% of race

Time at Steady Pace

2:16:56

49% of race

Time at Slower Pace

1:00:11

21% of race

Average Pace: 10:41 /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 mi11:26:5326:568:4026:56
8:40
#20861
10K
6.21 mi11:55:2155:248:5528:28
9:10
#22031
15K
9.32 mi12:22:531:22:568:5427:32
8:52
#21803
20K
12.43 mi12:54:391:54:429:1431:46
10:13
#22911
Half
13.11 mi13:02:122:02:159:207:33
11:04
#23194
25K
15.53 mi13:28:362:28:399:3426:24
10:53
#23603
30K
18.64 mi14:05:133:05:169:5636:37
11:47
#24066
20M
20.00 mi14:21:463:21:4910:0516:33
12:11
#24234
21M
21.00 mi14:39:033:39:0610:2617:17
17:17
#24740
35K
21.75 mi14:49:303:49:3310:3310:27
13:58
#24922
23M
23.00 mi15:05:244:05:2710:4015:54
12:42
#25024
24M
24.00 mi15:16:074:16:1010:4010:43
10:43
#24964
40K
24.85 mi15:25:204:25:2310:419:13
10:47
#24892
25.2M
25.20 mi15:29:184:29:2110:413:58
11:30
#24867
Finish
26.22 mi15:40:004:40:0310:4110:42
10:30
#24854
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM60-64Seg. OverallSeg. MalesSeg. M60-64
5K3.11 mi3.11 mi20861128011280121348(Top 75%)13103(Top 81%)13103(Top 1041%)
10K6.21 mi3.10 mi22031-117013341-54013341-54023050(Top 81%)13828(Top 86%)13828(Top 1098%)
15K9.32 mi3.11 mi21803+22813243+9813243+9821348(Top 75%)13103(Top 81%)13103(Top 1041%)
20K12.43 mi3.11 mi22911-110813774-53113774-53124694(Top 87%)14527(Top 90%)14527(Top 1154%)
Half13.11 mi0.68 mi23194-28313907-13313907-13326583(Top 94%)15343(Top 95%)15343(Top 1219%)
25K15.53 mi2.42 mi23603-40914062-15514062-15525037(Top 88%)14659(Top 91%)14659(Top 1164%)
30K18.64 mi3.11 mi24066-46314239-17714239-17725288(Top 89%)14672(Top 91%)14672(Top 1165%)
20M20.00 mi1.36 mi24234-16814295-5614295-5625508(Top 90%)14683(Top 91%)14683(Top 1166%)
21M21.00 mi1.00 mi24740-50614516-22114516-22128191(Top 99%)15977(Top 99%)15977(Top 1269%)
35K21.75 mi0.75 mi24922-18214589-7314589-7327666(Top 97%)15655(Top 97%)15655(Top 1243%)
23M23.00 mi1.25 mi25024-10214618-2914618-2926042(Top 92%)14861(Top 92%)14861(Top 1180%)
24M24.00 mi1.00 mi24964+6014578+4014578+4023358(Top 82%)13496(Top 84%)13496(Top 1072%)
40K24.85 mi0.85 mi24892+7214530+4814530+4822641(Top 80%)13066(Top 81%)13066(Top 1038%)
25.2M25.20 mi0.35 mi24867+2514517+1314517+1322051(Top 78%)12826(Top 80%)12826(Top 1019%)
Finish26.22 mi1.02 mi24854+1314499+1814499+1824282(Top 85%)13912(Top 86%)13912(Top 1105%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 75%
×21stories
+97ft-345ft

Overall

21348

Males

13103

M60-64

13103

5K→10K

3.1 - 6.2 mi

Top 81%
×5stories
+79ft-138ft

Overall

23050

Males

13828

M60-64

13828

10K→15K

6.2 - 9.3 mi

Top 75%
×3stories
+67ft-78ft

Overall

21348

Males

13103

M60-64

13103

15K→20K

9.3 - 12.4 mi

Top 87%
×5stories
+106ft-86ft

Overall

24694

Males

14527

M60-64

14527

20K→Half

12.4 - 13.1 mi

Top 94%
×2stories
+19ft-37ft

Overall

26583

Males

15343

M60-64

15343

Half→25K

13.1 - 15.5 mi

Top 88%
×4stories
+66ft-88ft

Overall

25037

Males

14659

M60-64

14659

25K→30K

15.5 - 18.6 mi

Top 89%
×9stories
+181ft-148ft

Overall

25288

Males

14672

M60-64

14672

30K→20M

18.6 - 20.0 mi

Top 90%
×5stories
+64ft-50ft

Overall

25508

Males

14683

M60-64

14683

20M→21M

20.0 - 21.0 mi

Top 99%
×8stories
+106ft-24ft

Overall

28191

Males

15977

M60-64

15977

21M→35K

21.0 - 21.8 mi

Top 97%
×7stories
+17ft-86ft

Overall

27666

Males

15655

M60-64

15655

35K→23M

21.8 - 23.0 mi

Top 92%
×5stories
+23ft-63ft

Overall

26042

Males

14861

M60-64

14861

23M→24M

23.0 - 24.0 mi

Top 82%
×6stories
+12ft-82ft

Overall

23358

Males

13496

M60-64

13496

24M→40K

24.0 - 24.9 mi

Top 80%
×1story
+6ft-20ft

Overall

22641

Males

13066

M60-64

13066

40K→25.2M

24.9 - 25.2 mi

Top 78%
×1story
+13ft-16ft

Overall

22051

Males

12826

M60-64

12826

25.2M→Finish

25.2 - 26.2 mi

Top 85%
×2stories
+22ft-21ft

Overall

24282

Males

13912

M60-64

13912

Passing Analysis

Category:
Athletes Passed
759
Passed By
4752
Net Change
-3993
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#20861
5K → 10K371207-1170#20861#22031
10K → 15K328100+228#22031#21803
15K → 20K261134-1108#21803#22911
20K → Half3286-283#22911#23194
Half → 25K42451-409#23194#23603
25K → 30K38501-463#23603#24066
30K → 20M34202-168#24066#24234
20M → 21M9515-506#24234#24740
21M → 35K6188-182#24740#24922
35K → 23M20122-102#24922#25024
23M → 24M699+60#25024#24964
24M → 40K797+72#24964#24892
40K → 25.2M272+25#24892#24867
25.2M → Finish4128+13#24867#24854
TOTALS7594752-3993
📊

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