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BOSTON MARATHON 2025

Tai-Chung Kuo

Bib: 11653•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M45-49)
#0 / 2386
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
24:35
Rank: #15813
Start → 5K
24:35 | 7:55/mi
10K· 6.21 mi
51:38
Rank: #18672 (-2859)
5K → 10K
27:03 | 8:42/mi
15K· 9.32 mi
1:17:25
Rank: #18440 (+232)
10K → 15K
25:47 | 8:18/mi
20K· 12.43 mi
1:45:13
Rank: #19050 (-610)
15K → 20K
27:48 | 8:57/mi
Half· 13.11 mi
1:50:51
Rank: #18990 (+60)
20K → Half
5:38 | 8:15/mi
25K· 15.53 mi
2:12:25
Rank: #19052 (-62)
Half → 25K
21:34 | 8:54/mi
30K· 18.64 mi
2:40:48
Rank: #18899 (+153)
25K → 30K
28:23 | 9:08/mi
20M
2:53:46
Rank: #18961 (-62)
30K → 20M
12:58 | 9:33/mi
21M
3:03:07
Rank: #18730 (+231)
20M → 21M
9:21 | 9:21/mi
35K· 21.75 mi
3:09:23
Rank: #18596 (+134)
21M → 35K
6:16 | 8:23/mi
23M
3:21:19
Rank: #18597 (-1)
35K → 23M
11:56 | 9:32/mi
24M
3:30:24
Rank: #18563 (+34)
23M → 24M
9:05 | 9:05/mi
40K· 24.85 mi
3:38:58
Rank: #18680 (-117)
24M → 40K
8:34 | 10:01/mi
25.2M
3:42:24
Rank: #18637 (+43)
40K → 25.2M
3:26 | 9:57/mi
Finish· 26.22 mi
3:51:06
Rank: #18565 (+72)
25.2M → Finish
8:42 | 8:32/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:50:51
Pace8:27 /mi
2nd Half
Distance13.11 mi
Time2:00:15
Pace9:10 /mi
📊Positive Split: 8.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:51:4724:357:5524:35
7:55
-
10K
6.21 mi11:18:5051:388:1927:03
8:42
+0:47
15K
9.32 mi11:44:371:17:258:1825:47
8:18
-0:24
20K
12.43 mi12:12:251:45:138:2827:48
8:57
+0:39
Half
13.11 mi12:18:031:50:518:275:38
8:15
-0:42
25K
15.53 mi12:39:372:12:258:3121:34
8:54
+0:39
30K
18.64 mi13:08:002:40:488:3828:23
9:08
+0:14
20M
20.00 mi13:20:582:53:468:4112:58
9:33
+0:25
21M
21.00 mi13:30:193:03:078:439:21
9:21
-0:12
35K
21.75 mi13:36:353:09:238:426:16
8:23
-0:58
23M
23.00 mi13:48:313:21:198:4511:56
9:32
+1:09
24M
24.00 mi13:57:363:30:248:469:05
9:05
-0:27
40K
24.85 mi14:06:103:38:588:498:34
10:01
+0:56
25.2M
25.20 mi14:09:363:42:248:503:26
9:57
-0:04
Finish
26.22 mi14:18:183:51:068:498:42
8:32
-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

7:55 /mi

Average Pace

8:49 /mi

Slowest Pace

10:01 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:10:58

31% of race

Time at Steady Pace

1:53:53

49% of race

Time at Slower Pace

46:15

20% of race

Average Pace: 8:49 /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 mi10:51:4724:357:5524:35
7:55
#15813
10K
6.21 mi11:18:5051:388:1927:03
8:42
#18672
15K
9.32 mi11:44:371:17:258:1825:47
8:18
#18440
20K
12.43 mi12:12:251:45:138:2827:48
8:57
#19050
Half
13.11 mi12:18:031:50:518:275:38
8:15
#18990
25K
15.53 mi12:39:372:12:258:3121:34
8:54
#19052
30K
18.64 mi13:08:002:40:488:3828:23
9:08
#18899
20M
20.00 mi13:20:582:53:468:4112:58
9:33
#18961
21M
21.00 mi13:30:193:03:078:439:21
9:21
#18730
35K
21.75 mi13:36:353:09:238:426:16
8:23
#18596
23M
23.00 mi13:48:313:21:198:4511:56
9:32
#18597
24M
24.00 mi13:57:363:30:248:469:05
9:05
#18563
40K
24.85 mi14:06:103:38:588:498:34
10:01
#18680
25.2M
25.20 mi14:09:363:42:248:503:26
9:57
#18637
Finish
26.22 mi14:18:183:51:068:498:42
8:32
#18565
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi15813107381073818037(Top 64%)11648(Top 72%)11648(Top 488%)
10K6.21 mi3.10 mi18672-285911894-115611894-115620893(Top 74%)12872(Top 80%)12872(Top 539%)
15K9.32 mi3.11 mi18440+23211797+9711797+9718037(Top 64%)11648(Top 72%)11648(Top 488%)
20K12.43 mi3.11 mi19050-61012061-26412061-26420697(Top 73%)12749(Top 79%)12749(Top 534%)
Half13.11 mi0.68 mi18990+6012035+2612035+2617621(Top 62%)11463(Top 71%)11463(Top 480%)
25K15.53 mi2.42 mi19052-6212050-1512050-1519397(Top 68%)12137(Top 75%)12137(Top 509%)
30K18.64 mi3.11 mi18899+15311956+9411956+9418324(Top 65%)11522(Top 72%)11522(Top 483%)
20M20.00 mi1.36 mi18961-6211952+411952+419343(Top 68%)11846(Top 74%)11846(Top 496%)
21M21.00 mi1.00 mi18730+23111824+12811824+12815401(Top 54%)9973(Top 62%)9973(Top 418%)
35K21.75 mi0.75 mi18596+13411752+7211752+7214723(Top 52%)9605(Top 60%)9605(Top 403%)
23M23.00 mi1.25 mi18597-111725+2711725+2718823(Top 66%)11365(Top 71%)11365(Top 476%)
24M24.00 mi1.00 mi18563+3411678+4711678+4717779(Top 63%)10821(Top 67%)10821(Top 454%)
40K24.85 mi0.85 mi18680-11711707-2911707-2920496(Top 72%)12036(Top 75%)12036(Top 504%)
25.2M25.20 mi0.35 mi18637+4311674+3311674+3316796(Top 59%)10279(Top 64%)10279(Top 431%)
Finish26.22 mi1.02 mi18565+7211630+4411630+4416441(Top 58%)10134(Top 63%)10134(Top 425%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 64%
×21stories
+97ft-345ft

Overall

18037

Males

11648

M45-49

11648

5K→10K

3.1 - 6.2 mi

Top 74%
×5stories
+79ft-138ft

Overall

20893

Males

12872

M45-49

12872

10K→15K

6.2 - 9.3 mi

Top 64%
×3stories
+67ft-78ft

Overall

18037

Males

11648

M45-49

11648

15K→20K

9.3 - 12.4 mi

Top 73%
×5stories
+106ft-86ft

Overall

20697

Males

12749

M45-49

12749

20K→Half

12.4 - 13.1 mi

Top 62%
×2stories
+19ft-37ft

Overall

17621

Males

11463

M45-49

11463

Half→25K

13.1 - 15.5 mi

Top 68%
×4stories
+66ft-88ft

Overall

19397

Males

12137

M45-49

12137

25K→30K

15.5 - 18.6 mi

Top 65%
×9stories
+181ft-148ft

Overall

18324

Males

11522

M45-49

11522

30K→20M

18.6 - 20.0 mi

Top 68%
×5stories
+64ft-50ft

Overall

19343

Males

11846

M45-49

11846

20M→21M

20.0 - 21.0 mi

Top 54%
×8stories
+106ft-24ft

Overall

15401

Males

9973

M45-49

9973

21M→35K

21.0 - 21.8 mi

Top 52%
×7stories
+17ft-86ft

Overall

14723

Males

9605

M45-49

9605

35K→23M

21.8 - 23.0 mi

Top 66%
×5stories
+23ft-63ft

Overall

18823

Males

11365

M45-49

11365

23M→24M

23.0 - 24.0 mi

Top 63%
×6stories
+12ft-82ft

Overall

17779

Males

10821

M45-49

10821

24M→40K

24.0 - 24.9 mi

Top 72%
×1story
+6ft-20ft

Overall

20496

Males

12036

M45-49

12036

40K→25.2M

24.9 - 25.2 mi

Top 59%
×1story
+13ft-16ft

Overall

16796

Males

10279

M45-49

10279

25.2M→Finish

25.2 - 26.2 mi

Top 58%
×2stories
+22ft-21ft

Overall

16441

Males

10134

M45-49

10134

Passing Analysis

Category:
Athletes Passed
1782
Passed By
4534
Net Change
-2752
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#15813
5K → 10K92868-2859#15813#18672
10K → 15K31381+232#18672#18440
15K → 20K73683-610#18440#19050
20K → Half688+60#19050#18990
Half → 25K151213-62#18990#19052
25K → 30K296143+153#19052#18899
30K → 20M89151-62#18899#18961
20M → 21M24413+231#18961#18730
21M → 35K1362+134#18730#18596
35K → 23M109110-1#18596#18597
23M → 24M9056+34#18597#18563
24M → 40K43160-117#18563#18680
40K → 25.2M5916+43#18680#18637
25.2M → Finish10230+72#18637#18565
TOTALS17824534-2752
📊

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