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BOSTON MARATHON 2026

Jin Suk Chang

Bib: 29817•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 (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
26:00
3.11 mi
Rank: #19330
Start → 5K
26:00 | 8:23/mi
10K
52:17
6.21 mi
Rank: #19689 (-359)
5K → 10K
26:17 | 8:28/mi
15K
1:18:24
9.32 mi
Rank: #19635 (+54)
10K → 15K
26:07 | 8:25/mi
20K
1:45:28
12.43 mi
Rank: #19840 (-205)
15K → 20K
27:04 | 8:43/mi
HALF
1:51:17
13.11 mi
Rank: #19875 (-35)
20K → HALF
5:49 | 8:32/mi
25K
2:13:09
15.53 mi
Rank: #20121 (-246)
HALF → 25K
21:52 | 9:01/mi
30K
2:43:27
18.64 mi
Rank: #20689 (-568)
25K → 30K
30:18 | 9:46/mi
20M
2:56:32
20.00 mi
Rank: #20763 (-74)
30K → 20M
13:05 | 9:38/mi
21M
3:07:08
21.00 mi
Rank: #20848 (-85)
20M → 21M
10:36 | 10:36/mi
35K
3:14:27
21.75 mi
Rank: #20951 (-103)
21M → 35K
7:19 | 9:47/mi
23M
3:27:17
23.00 mi
Rank: #21136 (-185)
35K → 23M
12:50 | 10:16/mi
24M
3:36:57
24.00 mi
Rank: #21201 (-65)
23M → 24M
9:40 | 9:40/mi
40K
3:44:54
24.85 mi
Rank: #21152 (+49)
24M → 40K
7:57 | 9:18/mi
25.2M
3:48:50
25.20 mi
Rank: #21214 (-62)
40K → 25.2M
3:56 | 11:25/mi
FINISH
3:58:29
26.22 mi
Rank: #21283 (-69)
25.2M → FINISH
9:39 | 9:29/mi

Splits & Pacing

Detailed breakdown of your race performance at each timing point

Half Splits

1st HalfFaster
via HALF
Distance13.11 mi
Time1:51:17
Pace8:30 /mi
2nd Half
Distance13.11 mi
Time2:07:12
Pace9:43 /mi
📊Positive Split: 14.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:51:4926:008:2326:00
8:23
-
10K
6.21 mi12:18:0652:178:2526:17
8:28
+0:05
15K
9.32 mi12:44:131:18:248:2526:07
8:25
-0:03
20K
12.43 mi13:11:171:45:288:3027:04
8:43
+0:18
HALF
13.11 mi13:17:061:51:178:305:49
8:32
-0:11
25K
15.53 mi13:38:582:13:098:3521:52
9:01
+0:29
30K
18.64 mi14:09:162:43:278:4730:18
9:46
+0:45
20M
20.00 mi14:22:212:56:328:5013:05
9:38
-0:08
21M
21.00 mi14:32:573:07:088:5510:36
10:36
+0:58
35K
21.75 mi14:40:163:14:278:577:19
9:47
-0:49
23M
23.00 mi14:53:063:27:179:0112:50
10:16
+0:29
24M
24.00 mi15:02:463:36:579:039:40
9:40
-0:36
40K
24.85 mi15:10:433:44:549:037:57
9:18
-0:22
25.2M
25.20 mi15:14:393:48:509:053:56
11:25
+2:07
FINISH
26.22 mi15:24:183:58:299:079:39
9:29
-1:56

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

8:23 /mi

Average Pace

9:06 /mi

Slowest Pace

11:25 /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

2:13:09

56% of race

Time at Steady Pace

1:17:58

33% of race

Time at Slower Pace

27:22

11% of race

Average Pace: 9:06 /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 mi11:51:4926:008:2326:00
8:23
#19330
10K
6.21 mi12:18:0652:178:2526:17
8:28
#19689
15K
9.32 mi12:44:131:18:248:2526:07
8:25
#19635
20K
12.43 mi13:11:171:45:288:3027:04
8:43
#19840
HALF
13.11 mi13:17:061:51:178:305:49
8:32
#19875
25K
15.53 mi13:38:582:13:098:3521:52
9:01
#20121
30K
18.64 mi14:09:162:43:278:4730:18
9:46
#20689
20M
20.00 mi14:22:212:56:328:5013:05
9:38
#20763
21M
21.00 mi14:32:573:07:088:5510:36
10:36
#20848
35K
21.75 mi14:40:163:14:278:577:19
9:47
#20951
23M
23.00 mi14:53:063:27:179:0112:50
10:16
#21136
24M
24.00 mi15:02:463:36:579:039:40
9:40
#21201
40K
24.85 mi15:10:433:44:549:037:57
9:18
#21152
25.2M
25.20 mi15:14:393:48:509:053:56
11:25
#21214
FINISH
26.22 mi15:24:183:58:299:079:39
9:29
#21283
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 mi19330119851198519595(Top 68%)12146(Top 74%)12146(Top 503%)
10K6.21 mi3.10 mi19689-35912156-17112156-17120135(Top 69%)12378(Top 76%)12378(Top 513%)
15K9.32 mi3.11 mi19635+5412139+1712139+1719595(Top 68%)12146(Top 74%)12146(Top 503%)
20K12.43 mi3.11 mi19840-20512211-7212211-7220518(Top 71%)12529(Top 77%)12529(Top 519%)
HALF13.11 mi0.68 mi19875-3512234-2312234-2320426(Top 70%)12534(Top 77%)12534(Top 519%)
25K15.53 mi2.42 mi20121-24612341-10712341-10721248(Top 73%)12868(Top 79%)12868(Top 533%)
30K18.64 mi3.11 mi20689-56812578-23712578-23722420(Top 77%)13341(Top 82%)13341(Top 553%)
20M20.00 mi1.36 mi20763-7412609-3112609-3121505(Top 74%)12818(Top 78%)12818(Top 531%)
21M21.00 mi1.00 mi20848-8512638-2912638-2922179(Top 76%)13114(Top 80%)13114(Top 543%)
35K21.75 mi0.75 mi20951-10312682-4412682-4422544(Top 78%)13225(Top 81%)13225(Top 548%)
23M23.00 mi1.25 mi21136-18512769-8712769-8722788(Top 79%)13291(Top 81%)13291(Top 551%)
24M24.00 mi1.00 mi21201-6512783-1412783-1421865(Top 75%)12813(Top 78%)12813(Top 531%)
40K24.85 mi0.85 mi21152+4912752+3112752+3119660(Top 68%)11684(Top 72%)11684(Top 484%)
25.2M25.20 mi0.35 mi21214-6212770-1812770-1823284(Top 80%)13430(Top 82%)13430(Top 557%)
FINISH26.22 mi1.02 mi21283-6912798-2812798-2822232(Top 77%)12961(Top 79%)12961(Top 537%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 68%
×21
+97ft-345ft

Overall

19595

Males

12146

M45-49

12146

5K→10K

3.1 - 6.2 mi

Top 69%
×5
+79ft-138ft

Overall

20135

Males

12378

M45-49

12378

10K→15K

6.2 - 9.3 mi

Top 68%
×3
+67ft-78ft

Overall

19595

Males

12146

M45-49

12146

15K→20K

9.3 - 12.4 mi

Top 71%
×5
+106ft-86ft

Overall

20518

Males

12529

M45-49

12529

20K→HALF

12.4 - 13.1 mi

Top 70%
×2
+19ft-37ft

Overall

20426

Males

12534

M45-49

12534

HALF→25K

13.1 - 15.5 mi

Top 73%
×4
+66ft-88ft

Overall

21248

Males

12868

M45-49

12868

25K→30K

15.5 - 18.6 mi

Top 77%
×9
+181ft-148ft

Overall

22420

Males

13341

M45-49

13341

30K→20M

18.6 - 20.0 mi

Top 74%
×5
+64ft-50ft

Overall

21505

Males

12818

M45-49

12818

20M→21M

20.0 - 21.0 mi

Top 76%
×8
+106ft-24ft

Overall

22179

Males

13114

M45-49

13114

21M→35K

21.0 - 21.8 mi

Top 78%
×7
+17ft-86ft

Overall

22544

Males

13225

M45-49

13225

35K→23M

21.8 - 23.0 mi

Top 79%
×5
+23ft-63ft

Overall

22788

Males

13291

M45-49

13291

23M→24M

23.0 - 24.0 mi

Top 75%
×6
+12ft-82ft

Overall

21865

Males

12813

M45-49

12813

24M→40K

24.0 - 24.9 mi

Top 68%
×1
+6ft-20ft

Overall

19660

Males

11684

M45-49

11684

40K→25.2M

24.9 - 25.2 mi

Top 80%
×1
+13ft-16ft

Overall

23284

Males

13430

M45-49

13430

25.2M→FINISH

25.2 - 26.2 mi

Top 77%
×2
+22ft-21ft

Overall

22232

Males

12961

M45-49

12961

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
890
Passed By
1885
Net Change
-1953
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#19330
5K → 10K136200-359#19330#19689
10K → 15K190136+54#19689#19635
15K → 20K88200-205#19635#19840
20K → HALF2257-35#19840#19875
HALF → 25K65200-246#19875#20121
25K → 30K72200-568#20121#20689
30K → 20M54128-74#20689#20763
20M → 21M46131-85#20763#20848
21M → 35K26129-103#20848#20951
35K → 23M34200-185#20951#21136
23M → 24M39104-65#21136#21201
24M → 40K7324+49#21201#21152
40K → 25.2M1375-62#21152#21214
25.2M → FINISH32101-69#21214#21283
TOTALS8901885-1953
📊

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