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BOSTON MARATHON 2026

Chia-Shu Ku

Bib: 21454•M

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0:00
0:00
/ mi
Masters
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Overall
#0 / 29021
Gender (Male)
#0 / 16340
Masters (Masters Men)
#0 / 10617
Age Group (M60-64)
#0 / 1514
Top 40%
Race Day Weather
51°/41°F
overcast clouds

Race Timeline and Course Information

Your journey through the course with elevation, pacing, and checkpoint details

⏱️ Race Timeline

Watch your race unfold from start to finish

Start
0:00:00
Race begins
5K
25:07
3.11 mi
Rank: #17505
Start → 5K
25:07 | 8:06/mi
10K
49:56
6.21 mi
Rank: #17324 (+181)
5K → 10K
24:49 | 8:00/mi
15K
1:15:06
9.32 mi
Rank: #17480 (-156)
10K → 15K
25:10 | 8:07/mi
20K
1:40:47
12.43 mi
Rank: #17576 (-96)
15K → 20K
25:41 | 8:16/mi
HALF
1:46:08
13.11 mi
Rank: #17508 (+68)
20K → HALF
5:21 | 7:51/mi
25K
2:06:11
15.53 mi
Rank: #17436 (+72)
HALF → 25K
20:03 | 8:17/mi
30K
2:32:34
18.64 mi
Rank: #17286 (+150)
25K → 30K
26:23 | 8:30/mi
20M
2:44:21
20.00 mi
Rank: #17252 (+34)
30K → 20M
11:47 | 8:41/mi
21M
2:54:26
21.00 mi
Rank: #17489 (-237)
20M → 21M
10:05 | 10:05/mi
35K
3:02:05
21.75 mi
Rank: #17859 (-370)
21M → 35K
7:39 | 10:14/mi
23M
3:13:44
23.00 mi
Rank: #17987 (-128)
35K → 23M
11:39 | 9:19/mi
24M
3:22:38
24.00 mi
Rank: #18026 (-39)
23M → 24M
8:54 | 8:54/mi
40K
3:30:11
24.85 mi
Rank: #17990 (+36)
24M → 40K
7:33 | 8:50/mi
25.2M
3:33:40
25.20 mi
Rank: #18032 (-42)
40K → 25.2M
3:29 | 10:07/mi
FINISH
3:42:25
26.22 mi
Rank: #18049 (-17)
25.2M → FINISH
8:45 | 8:36/mi

Splits & Pacing

Detailed breakdown of your race performance at each timing point

Half Splits

1st HalfFaster
via HALF
Distance13.11 mi
Time1:46:08
Pace8:06 /mi
2nd Half
Distance13.11 mi
Time1:56:17
Pace8:53 /mi
📊Positive Split: 9.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:47:2425:078:0625:07
8:06
-
10K
6.21 mi12:12:1349:568:0324:49
8:00
-0:06
15K
9.32 mi12:37:231:15:068:0425:10
8:07
+0:07
20K
12.43 mi13:03:041:40:478:0725:41
8:16
+0:09
HALF
13.11 mi13:08:251:46:088:065:21
7:51
-0:25
25K
15.53 mi13:28:282:06:118:0820:03
8:17
+0:26
30K
18.64 mi13:54:512:32:348:1226:23
8:30
+0:13
20M
20.00 mi14:06:382:44:218:1411:47
8:41
+0:11
21M
21.00 mi14:16:432:54:268:1910:05
10:05
+1:24
35K
21.75 mi14:24:223:02:058:237:39
10:14
+0:09
23M
23.00 mi14:36:013:13:448:2611:39
9:19
-0:55
24M
24.00 mi14:44:553:22:388:278:54
8:54
-0:25
40K
24.85 mi14:52:283:30:118:287:33
8:50
-0:04
25.2M
25.20 mi14:55:573:33:408:293:29
10:07
+1:17
FINISH
26.22 mi15:04:423:42:258:308:45
8:36
-1:31

Checkpoint Splits Visualizations

Explore your race data through different visual perspectives. Scroll to discover each visualization.

📈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

7:51 /mi

Average Pace

8:29 /mi

Slowest Pace

10:14 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Bar length shows time spent in each segment. Colors mark your faster to slower segments, relative to your own pace.

Time at Faster Pace

1:20:27

36% of race

Time at Steady Pace

1:49:06

49% of race

Time at Slower Pace

32:52

15% of race

Average Pace: 8:29 /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

Enhanced split table showing pace trends through mini sparkline visualizations.

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi11:47:2425:078:0625:07
8:06
#17505
10K
6.21 mi12:12:1349:568:0324:49
8:00
#17324
15K
9.32 mi12:37:231:15:068:0425:10
8:07
#17480
20K
12.43 mi13:03:041:40:478:0725:41
8:16
#17576
HALF
13.11 mi13:08:251:46:088:065:21
7:51
#17508
25K
15.53 mi13:28:282:06:118:0820:03
8:17
#17436
30K
18.64 mi13:54:512:32:348:1226:23
8:30
#17286
20M
20.00 mi14:06:382:44:218:1411:47
8:41
#17252
21M
21.00 mi14:16:432:54:268:1910:05
10:05
#17489
35K
21.75 mi14:24:223:02:058:237:39
10:14
#17859
23M
23.00 mi14:36:013:13:448:2611:39
9:19
#17987
24M
24.00 mi14:44:553:22:388:278:54
8:54
#18026
40K
24.85 mi14:52:283:30:118:287:33
8:50
#17990
25.2M
25.20 mi14:55:573:33:408:293:29
10:07
#18032
FINISH
26.22 mi15:04:423:42:258:308:45
8:36
#18049
Faster pace
Steady pace
Slower pace

Rankings

Your position at each checkpoint and how you ranked in each segment

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM60-64Seg. OverallSeg. MalesSeg. M60-64
5K3.11 mi3.11 mi17505112181121817706(Top 61%)11319(Top 69%)11319(Top 748%)
10K6.21 mi3.10 mi17324+18111134+8411134+8417131(Top 59%)11072(Top 68%)11072(Top 731%)
15K9.32 mi3.11 mi17480-15611198-6411198-6417706(Top 61%)11319(Top 69%)11319(Top 748%)
20K12.43 mi3.11 mi17576-9611244-4611244-4617894(Top 62%)11363(Top 70%)11363(Top 751%)
HALF13.11 mi0.68 mi17508+6811218+2611218+2615924(Top 55%)10582(Top 65%)10582(Top 699%)
25K15.53 mi2.42 mi17436+7211189+2911189+2917239(Top 59%)11043(Top 68%)11043(Top 729%)
30K18.64 mi3.11 mi17286+15011089+10011089+10016875(Top 58%)10777(Top 66%)10777(Top 712%)
20M20.00 mi1.36 mi17252+3411065+2411065+2417249(Top 59%)10861(Top 66%)10861(Top 717%)
21M21.00 mi1.00 mi17489-23711140-7511140-7520684(Top 71%)12399(Top 76%)12399(Top 819%)
35K21.75 mi0.75 mi17859-37011277-13711277-13723688(Top 82%)13776(Top 84%)13776(Top 910%)
23M23.00 mi1.25 mi17987-12811297-2011297-2019853(Top 68%)11861(Top 73%)11861(Top 783%)
24M24.00 mi1.00 mi18026-3911300-311300-318998(Top 65%)11406(Top 70%)11406(Top 753%)
40K24.85 mi0.85 mi17990+3611267+3311267+3317534(Top 60%)10676(Top 65%)10676(Top 705%)
25.2M25.20 mi0.35 mi18032-4211277-1011277-1019717(Top 68%)11715(Top 72%)11715(Top 774%)
FINISH26.22 mi1.02 mi18049-1711285-811285-818592(Top 64%)11180(Top 68%)11180(Top 738%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 61%
×21
+97ft-345ft

Overall

17706

Males

11319

M60-64

11319

5K→10K

3.1 - 6.2 mi

Top 59%
×5
+79ft-138ft

Overall

17131

Males

11072

M60-64

11072

10K→15K

6.2 - 9.3 mi

Top 61%
×3
+67ft-78ft

Overall

17706

Males

11319

M60-64

11319

15K→20K

9.3 - 12.4 mi

Top 62%
×5
+106ft-86ft

Overall

17894

Males

11363

M60-64

11363

20K→HALF

12.4 - 13.1 mi

Top 55%
×2
+19ft-37ft

Overall

15924

Males

10582

M60-64

10582

HALF→25K

13.1 - 15.5 mi

Top 59%
×4
+66ft-88ft

Overall

17239

Males

11043

M60-64

11043

25K→30K

15.5 - 18.6 mi

Top 58%
×9
+181ft-148ft

Overall

16875

Males

10777

M60-64

10777

30K→20M

18.6 - 20.0 mi

Top 59%
×5
+64ft-50ft

Overall

17249

Males

10861

M60-64

10861

20M→21M

20.0 - 21.0 mi

Top 71%
×8
+106ft-24ft

Overall

20684

Males

12399

M60-64

12399

21M→35K

21.0 - 21.8 mi

Top 82%
×7
+17ft-86ft

Overall

23688

Males

13776

M60-64

13776

35K→23M

21.8 - 23.0 mi

Top 68%
×5
+23ft-63ft

Overall

19853

Males

11861

M60-64

11861

23M→24M

23.0 - 24.0 mi

Top 65%
×6
+12ft-82ft

Overall

18998

Males

11406

M60-64

11406

24M→40K

24.0 - 24.9 mi

Top 60%
×1
+6ft-20ft

Overall

17534

Males

10676

M60-64

10676

40K→25.2M

24.9 - 25.2 mi

Top 68%
×1
+13ft-16ft

Overall

19717

Males

11715

M60-64

11715

25.2M→FINISH

25.2 - 26.2 mi

Top 64%
×2
+22ft-21ft

Overall

18592

Males

11180

M60-64

11180

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
1593*
Passed By
1762
Net Change
-544
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#17505
5K → 10K379*198+181#17505#17324
10K → 15K135200-156#17324#17480
15K → 20K140200-96#17480#17576
20K → HALF779+68#17576#17508
HALF → 25K16492+72#17508#17436
25K → 30K265*115+150#17436#17286
30K → 20M10773+34#17286#17252
20M → 21M27200-237#17252#17489
21M → 35K14200-370#17489#17859
35K → 23M63191-128#17859#17987
23M → 24M5392-39#17987#18026
24M → 40K8549+36#18026#17990
40K → 25.2M2163-42#17990#18032
25.2M → FINISH6380-17#18032#18049
TOTALS1593*1762-544

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

Passing Analysis Visualizations

Explore your passing analysis through 5 different visualizations. Scroll to discover each one.

Time:
Category:

📈Position Graph

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🎨Heatmap Timeline

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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Activity Data

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing