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BOSTON MARATHON 2026

Kuangyi Tsai

Bib: 27444•M

CA

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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 (M45-49)
#0 / 2413
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
24:10
3.11 mi
Rank: #15217
Start → 5K
24:10 | 7:47/mi
10K
49:17
6.21 mi
Rank: #16564 (-1347)
5K → 10K
25:07 | 8:06/mi
15K
1:14:38
9.32 mi
Rank: #17121 (-557)
10K → 15K
25:21 | 8:10/mi
20K
1:39:37
12.43 mi
Rank: #16910 (+211)
15K → 20K
24:59 | 8:03/mi
HALF
1:45:05
13.11 mi
Rank: #16927 (-17)
20K → HALF
5:28 | 8:02/mi
25K
2:04:39
15.53 mi
Rank: #16740 (+187)
HALF → 25K
19:34 | 8:05/mi
30K
2:30:20
18.64 mi
Rank: #16483 (+257)
25K → 30K
25:41 | 8:16/mi
20M
2:41:32
20.00 mi
Rank: #16299 (+184)
30K → 20M
11:12 | 8:15/mi
21M
2:50:00
21.00 mi
Rank: #16079 (+220)
20M → 21M
8:28 | 8:28/mi
35K
2:55:56
21.75 mi
Rank: #15976 (+103)
21M → 35K
5:56 | 7:56/mi
23M
3:05:56
23.00 mi
Rank: #15742 (+234)
35K → 23M
10:00 | 8:00/mi
24M
3:13:38
24.00 mi
Rank: #15561 (+181)
23M → 24M
7:42 | 7:42/mi
40K
3:20:20
24.85 mi
Rank: #15399 (+162)
24M → 40K
6:42 | 7:51/mi
25.2M
3:23:13
25.20 mi
Rank: #15327 (+72)
40K → 25.2M
2:53 | 8:22/mi
FINISH
3:30:39
26.22 mi
Rank: #15096 (+231)
25.2M → FINISH
7:26 | 7:18/mi

Splits & Pacing

Detailed breakdown of your race performance at each timing point

Half Splits

1st Half⚖️ Balanced
via HALF
Distance13.11 mi
Time1:45:05
Pace8:01 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:45:34
Pace8:04 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:45:2124:107:4724:10
7:47
-
10K
6.21 mi12:10:2849:177:5625:07
8:06
+0:19
15K
9.32 mi12:35:491:14:388:0125:21
8:10
+0:04
20K
12.43 mi13:00:481:39:378:0124:59
8:03
-0:07
HALF
13.11 mi13:06:161:45:058:015:28
8:02
-0:01
25K
15.53 mi13:25:502:04:398:0219:34
8:05
+0:03
30K
18.64 mi13:51:312:30:208:0425:41
8:16
+0:11
20M
20.00 mi14:02:432:41:328:0511:12
8:15
-0:01
21M
21.00 mi14:11:112:50:008:068:28
8:28
+0:13
35K
21.75 mi14:17:072:55:568:065:56
7:56
-0:32
23M
23.00 mi14:27:073:05:568:0610:00
8:00
+0:04
24M
24.00 mi14:34:493:13:388:057:42
7:42
-0:18
40K
24.85 mi14:41:313:20:208:046:42
7:51
+0:09
25.2M
25.20 mi14:44:243:23:138:042:53
8:22
+0:31
FINISH
26.22 mi14:51:503:30:398:037:26
7:18
-1:04

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

7:18 /mi

Average Pace

8:02 /mi

Slowest Pace

8:28 /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

1:01:56

29% of race

Time at Steady Pace

2:28:43

71% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:02 /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 mi11:45:2124:107:4724:10
7:47
#15217
10K
6.21 mi12:10:2849:177:5625:07
8:06
#16564
15K
9.32 mi12:35:491:14:388:0125:21
8:10
#17121
20K
12.43 mi13:00:481:39:378:0124:59
8:03
#16910
HALF
13.11 mi13:06:161:45:058:015:28
8:02
#16927
25K
15.53 mi13:25:502:04:398:0219:34
8:05
#16740
30K
18.64 mi13:51:312:30:208:0425:41
8:16
#16483
20M
20.00 mi14:02:432:41:328:0511:12
8:15
#16299
21M
21.00 mi14:11:112:50:008:068:28
8:28
#16079
35K
21.75 mi14:17:072:55:568:065:56
7:56
#15976
23M
23.00 mi14:27:073:05:568:0610:00
8:00
#15742
24M
24.00 mi14:34:493:13:388:057:42
7:42
#15561
40K
24.85 mi14:41:313:20:208:046:42
7:51
#15399
25.2M
25.20 mi14:44:243:23:138:042:53
8:22
#15327
FINISH
26.22 mi14:51:503:30:398:037:26
7:18
#15096
Faster pace
Steady pace
Slower pace

Rankings

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

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi15217103321033218062(Top 62%)11475(Top 70%)11475(Top 476%)
10K6.21 mi3.10 mi16564-134710821-48910821-48917841(Top 61%)11360(Top 70%)11360(Top 471%)
15K9.32 mi3.11 mi17121-55711047-22611047-22618062(Top 62%)11475(Top 70%)11475(Top 476%)
20K12.43 mi3.11 mi16910+21110956+9110956+9116404(Top 57%)10729(Top 66%)10729(Top 445%)
HALF13.11 mi0.68 mi16927-1710964-810964-817180(Top 59%)11075(Top 68%)11075(Top 459%)
25K15.53 mi2.42 mi16740+18710878+8610878+8615896(Top 55%)10467(Top 64%)10467(Top 434%)
30K18.64 mi3.11 mi16483+25710727+15110727+15115382(Top 53%)10139(Top 62%)10139(Top 420%)
20M20.00 mi1.36 mi16299+18410635+9210635+9214539(Top 50%)9707(Top 59%)9707(Top 402%)
21M21.00 mi1.00 mi16079+22010518+11710518+11712897(Top 44%)8861(Top 54%)8861(Top 367%)
35K21.75 mi0.75 mi15976+10310469+4910469+4913970(Top 48%)9309(Top 57%)9309(Top 386%)
23M23.00 mi1.25 mi15742+23410355+11410355+11412381(Top 43%)8539(Top 52%)8539(Top 354%)
24M24.00 mi1.00 mi15561+18110260+9510260+9511538(Top 40%)8044(Top 49%)8044(Top 333%)
40K24.85 mi0.85 mi15399+16210170+9010170+9011310(Top 39%)7864(Top 48%)7864(Top 326%)
25.2M25.20 mi0.35 mi15327+7210137+3310137+3310700(Top 37%)7507(Top 46%)7507(Top 311%)
FINISH26.22 mi1.02 mi15096+23110033+10410033+1049850(Top 34%)7055(Top 43%)7055(Top 292%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 62%
×21
+97ft-345ft

Overall

18062

Males

11475

M45-49

11475

5K→10K

3.1 - 6.2 mi

Top 61%
×5
+79ft-138ft

Overall

17841

Males

11360

M45-49

11360

10K→15K

6.2 - 9.3 mi

Top 62%
×3
+67ft-78ft

Overall

18062

Males

11475

M45-49

11475

15K→20K

9.3 - 12.4 mi

Top 57%
×5
+106ft-86ft

Overall

16404

Males

10729

M45-49

10729

20K→HALF

12.4 - 13.1 mi

Top 59%
×2
+19ft-37ft

Overall

17180

Males

11075

M45-49

11075

HALF→25K

13.1 - 15.5 mi

Top 55%
×4
+66ft-88ft

Overall

15896

Males

10467

M45-49

10467

25K→30K

15.5 - 18.6 mi

Top 53%
×9
+181ft-148ft

Overall

15382

Males

10139

M45-49

10139

30K→20M

18.6 - 20.0 mi

Top 50%
×5
+64ft-50ft

Overall

14539

Males

9707

M45-49

9707

20M→21M

20.0 - 21.0 mi

Top 44%
×8
+106ft-24ft

Overall

12897

Males

8861

M45-49

8861

21M→35K

21.0 - 21.8 mi

Top 48%
×7
+17ft-86ft

Overall

13970

Males

9309

M45-49

9309

35K→23M

21.8 - 23.0 mi

Top 43%
×5
+23ft-63ft

Overall

12381

Males

8539

M45-49

8539

23M→24M

23.0 - 24.0 mi

Top 40%
×6
+12ft-82ft

Overall

11538

Males

8044

M45-49

8044

24M→40K

24.0 - 24.9 mi

Top 39%
×1
+6ft-20ft

Overall

11310

Males

7864

M45-49

7864

40K→25.2M

24.9 - 25.2 mi

Top 37%
×1
+13ft-16ft

Overall

10700

Males

7507

M45-49

7507

25.2M→FINISH

25.2 - 26.2 mi

Top 34%
×2
+22ft-21ft

Overall

9850

Males

7055

M45-49

7055

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
2419*
Passed By
703
Net Change
+121
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#15217
5K → 10K30200-1347#15217#16564
10K → 15K61200-557#16564#17121
15K → 20K283*72+211#17121#16910
20K → HALF2845-17#16910#16927
HALF → 25K233*46+187#16927#16740
25K → 30K331*74+257#16740#16483
30K → 20M19713+184#16483#16299
20M → 21M230*10+220#16299#16079
21M → 35K11613+103#16079#15976
35K → 23M245*11+234#15976#15742
23M → 24M1843+181#15742#15561
24M → 40K1697+162#15561#15399
40K → 25.2M775+72#15399#15327
25.2M → FINISH235*4+231#15327#15096
TOTALS2419*703+121

* 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