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BOSTON MARATHON 2026

Chao Chi Chang

Bib: 32896•M

Masters
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0:00
0:00
/ mi
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Overall
#0 / 29021
Gender (Male)
#0 / 16340
Masters (Masters Men)
#0 / 10617
Age Group (M50-54)
#0 / 1868
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· 3.11 mi
25:59
Rank: #19282
Start → 5K
25:59 | 8:22/mi
10K· 6.21 mi
53:17
Rank: #20591 (-1309)
5K → 10K
27:18 | 8:48/mi
15K· 9.32 mi
1:19:44
Rank: #20452 (+139)
10K → 15K
26:27 | 8:31/mi
20K· 12.43 mi
1:47:29
Rank: #20774 (-322)
15K → 20K
27:45 | 8:56/mi
HALF· 13.11 mi
1:53:27
Rank: #20810 (-36)
20K → HALF
5:58 | 8:46/mi
25K· 15.53 mi
2:15:57
Rank: #21089 (-279)
HALF → 25K
22:30 | 9:17/mi
30K· 18.64 mi
2:44:26
Rank: #20935 (+154)
25K → 30K
28:29 | 9:11/mi
20M
2:56:46
Rank: #20820 (+115)
30K → 20M
12:20 | 9:05/mi
21M
3:06:42
Rank: #20763 (+57)
20M → 21M
9:56 | 9:56/mi
35K· 21.75 mi
3:13:22
Rank: #20706 (+57)
21M → 35K
6:40 | 8:55/mi
23M
3:24:44
Rank: #20619 (+87)
35K → 23M
11:22 | 9:05/mi
24M
3:33:24
Rank: #20489 (+130)
23M → 24M
8:40 | 8:40/mi
40K· 24.85 mi
3:41:07
Rank: #20415 (+74)
24M → 40K
7:43 | 9:02/mi
25.2M
3:44:40
Rank: #20408 (+7)
40K → 25.2M
3:33 | 10:18/mi
FINISH· 26.22 mi
3:53:52
Rank: #20435 (-27)
25.2M → FINISH
9:12 | 9:02/mi
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Splits & Pacing

Detailed breakdown of your race performance at each timing point

Half Splits

1st HalfFaster
via HALF
Distance13.11 mi
Time1:53:27
Pace8:40 /mi
2nd Half
Distance13.11 mi
Time2:00:25
Pace9:12 /mi
📊Positive Split: 6.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:55:0925:598:2225:59
8:22
-
10K
6.21 mi12:22:2753:178:3527:18
8:48
+0:26
15K
9.32 mi12:48:541:19:448:3426:27
8:31
-0:17
20K
12.43 mi13:16:391:47:298:3927:45
8:56
+0:25
HALF
13.11 mi13:22:371:53:278:405:58
8:46
-0:10
25K
15.53 mi13:45:072:15:578:4622:30
9:17
+0:31
30K
18.64 mi14:13:362:44:268:5028:29
9:11
-0:06
20M
20.00 mi14:25:562:56:468:5112:20
9:05
-0:06
21M
21.00 mi14:35:523:06:428:549:56
9:56
+0:51
35K
21.75 mi14:42:323:13:228:546:40
8:55
-1:01
23M
23.00 mi14:53:543:24:448:5511:22
9:05
+0:10
24M
24.00 mi15:02:343:33:248:548:40
8:40
-0:25
40K
24.85 mi15:10:173:41:078:547:43
9:02
+0:22
25.2M
25.20 mi15:13:503:44:408:553:33
10:18
+1:16
FINISH
26.22 mi15:23:023:53:528:569:12
9:02
-1:16

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

8:22 /mi

Average Pace

8:56 /mi

Slowest Pace

10:18 /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

1:07:04

29% of race

Time at Steady Pace

2:10:49

56% of race

Time at Slower Pace

35:59

15% of race

Average Pace: 8:55 /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 mi11:55:0925:598:2225:59
8:22
#19282
10K
6.21 mi12:22:2753:178:3527:18
8:48
#20591
15K
9.32 mi12:48:541:19:448:3426:27
8:31
#20452
20K
12.43 mi13:16:391:47:298:3927:45
8:56
#20774
HALF
13.11 mi13:22:371:53:278:405:58
8:46
#20810
25K
15.53 mi13:45:072:15:578:4622:30
9:17
#21089
30K
18.64 mi14:13:362:44:268:5028:29
9:11
#20935
20M
20.00 mi14:25:562:56:468:5112:20
9:05
#20820
21M
21.00 mi14:35:523:06:428:549:56
9:56
#20763
35K
21.75 mi14:42:323:13:228:546:40
8:55
#20706
23M
23.00 mi14:53:543:24:448:5511:22
9:05
#20619
24M
24.00 mi15:02:343:33:248:548:40
8:40
#20489
40K
24.85 mi15:10:173:41:078:547:43
9:02
#20415
25.2M
25.20 mi15:13:503:44:408:553:33
10:18
#20408
FINISH
26.22 mi15:23:023:53:528:569:12
9:02
#20435
Faster pace
Steady pace
Slower pace

Rankings

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

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi19282119621196220232(Top 70%)12430(Top 76%)12430(Top 665%)
10K6.21 mi3.10 mi20591-130912565-60312565-60321845(Top 75%)13179(Top 81%)13179(Top 706%)
15K9.32 mi3.11 mi20452+13912522+4312522+4320232(Top 70%)12430(Top 76%)12430(Top 665%)
20K12.43 mi3.11 mi20774-32212656-13412656-13421606(Top 74%)13049(Top 80%)13049(Top 699%)
HALF13.11 mi0.68 mi20810-3612670-1412670-1421540(Top 74%)13035(Top 80%)13035(Top 698%)
25K15.53 mi2.42 mi21089-27912788-11812788-11822312(Top 77%)13381(Top 82%)13381(Top 716%)
30K18.64 mi3.11 mi20935+15412699+8912699+8920363(Top 70%)12358(Top 76%)12358(Top 662%)
20M20.00 mi1.36 mi20820+11512635+6412635+6419308(Top 67%)11800(Top 72%)11800(Top 632%)
21M21.00 mi1.00 mi20763+5712603+3212603+3220197(Top 70%)12168(Top 74%)12168(Top 651%)
35K21.75 mi0.75 mi20706+5712561+4212561+4219646(Top 68%)11797(Top 72%)11797(Top 632%)
23M23.00 mi1.25 mi20619+8712511+5012511+5018887(Top 65%)11403(Top 70%)11403(Top 610%)
24M24.00 mi1.00 mi20489+13012429+8212429+8217838(Top 61%)10872(Top 67%)10872(Top 582%)
40K24.85 mi0.85 mi20415+7412380+4912380+4918522(Top 64%)11133(Top 68%)11133(Top 596%)
25.2M25.20 mi0.35 mi20408+712372+812372+820382(Top 70%)12040(Top 74%)12040(Top 645%)
FINISH26.22 mi1.02 mi20435-2712370+212370+220617(Top 71%)12163(Top 74%)12163(Top 651%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 70%
×21stories
+97ft-345ft

Overall

20232

Males

12430

M50-54

12430

5K→10K

3.1 - 6.2 mi

Top 75%
×5stories
+79ft-138ft

Overall

21845

Males

13179

M50-54

13179

10K→15K

6.2 - 9.3 mi

Top 70%
×3stories
+67ft-78ft

Overall

20232

Males

12430

M50-54

12430

15K→20K

9.3 - 12.4 mi

Top 74%
×5stories
+106ft-86ft

Overall

21606

Males

13049

M50-54

13049

20K→HALF

12.4 - 13.1 mi

Top 74%
×2stories
+19ft-37ft

Overall

21540

Males

13035

M50-54

13035

HALF→25K

13.1 - 15.5 mi

Top 77%
×4stories
+66ft-88ft

Overall

22312

Males

13381

M50-54

13381

25K→30K

15.5 - 18.6 mi

Top 70%
×9stories
+181ft-148ft

Overall

20363

Males

12358

M50-54

12358

30K→20M

18.6 - 20.0 mi

Top 67%
×5stories
+64ft-50ft

Overall

19308

Males

11800

M50-54

11800

20M→21M

20.0 - 21.0 mi

Top 70%
×8stories
+106ft-24ft

Overall

20197

Males

12168

M50-54

12168

21M→35K

21.0 - 21.8 mi

Top 68%
×7stories
+17ft-86ft

Overall

19646

Males

11797

M50-54

11797

35K→23M

21.8 - 23.0 mi

Top 65%
×5stories
+23ft-63ft

Overall

18887

Males

11403

M50-54

11403

23M→24M

23.0 - 24.0 mi

Top 61%
×6stories
+12ft-82ft

Overall

17838

Males

10872

M50-54

10872

24M→40K

24.0 - 24.9 mi

Top 64%
×1story
+6ft-20ft

Overall

18522

Males

11133

M50-54

11133

40K→25.2M

24.9 - 25.2 mi

Top 70%
×1story
+13ft-16ft

Overall

20382

Males

12040

M50-54

12040

25.2M→FINISH

25.2 - 26.2 mi

Top 71%
×2stories
+22ft-21ft

Overall

20617

Males

12163

M50-54

12163

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
1442
Passed By
2595
Net Change
-1153
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#19282
5K → 10K301339-1309#19282#20591
10K → 15K281142+139#20591#20452
15K → 20K83405-322#20452#20774
20K → HALF2056-36#20774#20810
HALF → 25K54333-279#20810#21089
25K → 30K23985+154#21089#20935
30K → 20M13520+115#20935#20820
20M → 21M10447+57#20820#20763
21M → 35K7720+57#20763#20706
35K → 23M11427+87#20706#20619
23M → 24M1399+130#20619#20489
24M → 40K9117+74#20489#20415
40K → 25.2M2922+7#20415#20408
25.2M → FINISH4673-27#20408#20435
TOTALS14422595-1153
📊

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