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BOSTON MARATHON 2026

Chih-Wen Su

Bib: 8838•M

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0:00
0:00
/ mi
Masters
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Overall
#0 / 29021
Top 33%
Gender (Male)
#0 / 16340
Top 46%
Masters (Masters Men)
#0 / 10617
Top 34%
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
22:23
3.11 mi
Rank: #10194
Start → 5K
22:23 | 7:13/mi
10K
44:29
6.21 mi
Rank: #9839 (+355)
5K → 10K
22:06 | 7:07/mi
15K
1:06:15
9.32 mi
Rank: #9345 (+494)
10K → 15K
21:46 | 7:01/mi
20K
1:29:10
12.43 mi
Rank: #9667 (-322)
15K → 20K
22:55 | 7:23/mi
HALF
1:34:13
13.11 mi
Rank: #9788 (-121)
20K → HALF
5:03 | 7:25/mi
25K
1:52:11
15.53 mi
Rank: #9906 (-118)
HALF → 25K
17:58 | 7:25/mi
30K
2:15:25
18.64 mi
Rank: #9763 (+143)
25K → 30K
23:14 | 7:29/mi
20M
2:25:36
20.00 mi
Rank: #9682 (+81)
30K → 20M
10:11 | 7:30/mi
21M
2:33:35
21.00 mi
Rank: #9649 (+33)
20M → 21M
7:59 | 7:59/mi
35K
2:39:09
21.75 mi
Rank: #9632 (+17)
21M → 35K
5:34 | 7:27/mi
23M
2:48:36
23.00 mi
Rank: #9542 (+90)
35K → 23M
9:27 | 7:34/mi
24M
2:56:00
24.00 mi
Rank: #9488 (+54)
23M → 24M
7:24 | 7:24/mi
40K
3:02:32
24.85 mi
Rank: #9498 (-10)
24M → 40K
6:32 | 7:39/mi
25.2M
3:05:22
25.20 mi
Rank: #9481 (+17)
40K → 25.2M
2:50 | 8:13/mi
FINISH
3:12:51
26.22 mi
Rank: #9468 (+13)
25.2M → FINISH
7:29 | 7:21/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
Time1:34:13
Pace7:12 /mi
2nd Half
Distance13.11 mi
Time1:38:38
Pace7:32 /mi
📊Positive Split: 4.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:37:3922:237:1322:23
7:13
-
10K
6.21 mi10:59:4544:297:1022:06
7:07
-0:06
15K
9.32 mi11:21:311:06:157:0721:46
7:01
-0:06
20K
12.43 mi11:44:261:29:107:1122:55
7:23
+0:22
HALF
13.11 mi11:49:291:34:137:125:03
7:25
+0:02
25K
15.53 mi12:07:271:52:117:1417:58
7:25
0:00
30K
18.64 mi12:30:412:15:257:1623:14
7:29
+0:04
20M
20.00 mi12:40:522:25:367:1710:11
7:30
+0:01
21M
21.00 mi12:48:512:33:357:197:59
7:59
+0:29
35K
21.75 mi12:54:252:39:097:205:34
7:27
-0:32
23M
23.00 mi13:03:522:48:367:209:27
7:34
+0:07
24M
24.00 mi13:11:162:56:007:217:24
7:24
-0:10
40K
24.85 mi13:17:483:02:327:216:32
7:39
+0:15
25.2M
25.20 mi13:20:383:05:227:222:50
8:13
+0:34
FINISH
26.22 mi13:28:073:12:517:227:29
7:21
-0:52

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

7:01 /mi

Average Pace

7:22 /mi

Slowest Pace

8:13 /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

3:02:02

94% of race

Time at Steady Pace

10:49

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:21 /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 mi10:37:3922:237:1322:23
7:13
#10194
10K
6.21 mi10:59:4544:297:1022:06
7:07
#9839
15K
9.32 mi11:21:311:06:157:0721:46
7:01
#9345
20K
12.43 mi11:44:261:29:107:1122:55
7:23
#9667
HALF
13.11 mi11:49:291:34:137:125:03
7:25
#9788
25K
15.53 mi12:07:271:52:117:1417:58
7:25
#9906
30K
18.64 mi12:30:412:15:257:1623:14
7:29
#9763
20M
20.00 mi12:40:522:25:367:1710:11
7:30
#9682
21M
21.00 mi12:48:512:33:357:197:59
7:59
#9649
35K
21.75 mi12:54:252:39:097:205:34
7:27
#9632
23M
23.00 mi13:03:522:48:367:209:27
7:34
#9542
24M
24.00 mi13:11:162:56:007:217:24
7:24
#9488
40K
24.85 mi13:17:483:02:327:216:32
7:39
#9498
25.2M
25.20 mi13:20:383:05:227:222:50
8:13
#9481
FINISH
26.22 mi13:28:073:12:517:227:29
7:21
#9468
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 mi10194818781878609(Top 30%)7250(Top 44%)7250(Top 300%)
10K6.21 mi3.10 mi9839+3557995+1927995+1929485(Top 33%)7781(Top 48%)7781(Top 322%)
15K9.32 mi3.11 mi9345+4947712+2837712+2838609(Top 30%)7250(Top 44%)7250(Top 300%)
20K12.43 mi3.11 mi9667-3227865-1537865-15310886(Top 38%)8329(Top 51%)8329(Top 345%)
HALF13.11 mi0.68 mi9788-1217918-537918-5312088(Top 42%)8943(Top 55%)8943(Top 371%)
25K15.53 mi2.42 mi9906-1187950-327950-3210613(Top 37%)8133(Top 50%)8133(Top 337%)
30K18.64 mi3.11 mi9763+1437816+1347816+1349483(Top 33%)7418(Top 45%)7418(Top 307%)
20M20.00 mi1.36 mi9682+817751+657751+659089(Top 31%)7116(Top 44%)7116(Top 295%)
21M21.00 mi1.00 mi9649+337702+497702+499754(Top 34%)7340(Top 45%)7340(Top 304%)
35K21.75 mi0.75 mi9632+177681+217681+2110342(Top 36%)7643(Top 47%)7643(Top 317%)
23M23.00 mi1.25 mi9542+907603+787603+789217(Top 32%)6991(Top 43%)6991(Top 290%)
24M24.00 mi1.00 mi9488+547553+507553+509320(Top 32%)6955(Top 43%)6955(Top 288%)
40K24.85 mi0.85 mi9498-107537+167537+169866(Top 34%)7138(Top 44%)7138(Top 296%)
25.2M25.20 mi0.35 mi9481+177509+287509+289670(Top 33%)6959(Top 43%)6959(Top 288%)
FINISH26.22 mi1.02 mi9468+137467+427467+4210181(Top 35%)7211(Top 44%)7211(Top 299%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 30%
×21
+97ft-345ft

Overall

8609

Males

7250

M45-49

7250

5K→10K

3.1 - 6.2 mi

Top 33%
×5
+79ft-138ft

Overall

9485

Males

7781

M45-49

7781

10K→15K

6.2 - 9.3 mi

Top 30%
×3
+67ft-78ft

Overall

8609

Males

7250

M45-49

7250

15K→20K

9.3 - 12.4 mi

Top 38%
×5
+106ft-86ft

Overall

10886

Males

8329

M45-49

8329

20K→HALF

12.4 - 13.1 mi

Top 42%
×2
+19ft-37ft

Overall

12088

Males

8943

M45-49

8943

HALF→25K

13.1 - 15.5 mi

Top 37%
×4
+66ft-88ft

Overall

10613

Males

8133

M45-49

8133

25K→30K

15.5 - 18.6 mi

Top 33%
×9
+181ft-148ft

Overall

9483

Males

7418

M45-49

7418

30K→20M

18.6 - 20.0 mi

Top 31%
×5
+64ft-50ft

Overall

9089

Males

7116

M45-49

7116

20M→21M

20.0 - 21.0 mi

Top 34%
×8
+106ft-24ft

Overall

9754

Males

7340

M45-49

7340

21M→35K

21.0 - 21.8 mi

Top 36%
×7
+17ft-86ft

Overall

10342

Males

7643

M45-49

7643

35K→23M

21.8 - 23.0 mi

Top 32%
×5
+23ft-63ft

Overall

9217

Males

6991

M45-49

6991

23M→24M

23.0 - 24.0 mi

Top 32%
×6
+12ft-82ft

Overall

9320

Males

6955

M45-49

6955

24M→40K

24.0 - 24.9 mi

Top 34%
×1
+6ft-20ft

Overall

9866

Males

7138

M45-49

7138

40K→25.2M

24.9 - 25.2 mi

Top 33%
×1
+13ft-16ft

Overall

9670

Males

6959

M45-49

6959

25.2M→FINISH

25.2 - 26.2 mi

Top 35%
×2
+22ft-21ft

Overall

10181

Males

7211

M45-49

7211

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
2098*
Passed By
1372
Net Change
+726
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#10194
5K → 10K470*115+355#10194#9839
10K → 15K519*25+494#9839#9345
15K → 20K67389-322#9345#9667
20K → HALF3124-121#9667#9788
HALF → 25K82200-118#9788#9906
25K → 30K247104+143#9906#9763
30K → 20M12039+81#9763#9682
20M → 21M9966+33#9682#9649
21M → 35K5942+17#9649#9632
35K → 23M13646+90#9632#9542
23M → 24M10248+54#9542#9488
24M → 40K6878-10#9488#9498
40K → 25.2M4528+17#9498#9481
25.2M → FINISH8168+13#9481#9468
TOTALS2098*1372+726

* 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