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BOSTON MARATHON 2026

Chienyi Su

Bib: 21257•F

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0:00
0:00
/ mi
Masters
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Overall
#0 / 29021
Gender (Female)
#0 / 12578
Top 50%
Masters (Masters Women)
#0 / 6862
Top 38%
Age Group (F45-49)
#0 / 1786
Top 49%
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
23:52
3.11 mi
Rank: #14404
Start → 5K
23:52 | 7:41/mi
10K
48:21
6.21 mi
Rank: #15322 (-918)
5K → 10K
24:29 | 7:53/mi
15K
1:13:32
9.32 mi
Rank: #16168 (-846)
10K → 15K
25:11 | 8:07/mi
20K
1:39:38
12.43 mi
Rank: #16923 (-755)
15K → 20K
26:06 | 8:25/mi
HALF
1:45:10
13.11 mi
Rank: #16986 (-63)
20K → HALF
5:32 | 8:08/mi
25K
2:05:37
15.53 mi
Rank: #17181 (-195)
HALF → 25K
20:27 | 8:26/mi
30K
2:32:43
18.64 mi
Rank: #17335 (-154)
25K → 30K
27:06 | 8:44/mi
20M
2:44:51
20.00 mi
Rank: #17435 (-100)
30K → 20M
12:08 | 8:56/mi
21M
2:54:22
21.00 mi
Rank: #17468 (-33)
20M → 21M
9:31 | 9:31/mi
35K
3:00:39
21.75 mi
Rank: #17441 (+27)
21M → 35K
6:17 | 8:24/mi
23M
3:11:50
23.00 mi
Rank: #17476 (-35)
35K → 23M
11:11 | 8:57/mi
24M
3:20:23
24.00 mi
Rank: #17432 (+44)
23M → 24M
8:33 | 8:33/mi
40K
3:27:43
24.85 mi
Rank: #17360 (+72)
24M → 40K
7:20 | 8:35/mi
25.2M
3:30:55
25.20 mi
Rank: #17340 (+20)
40K → 25.2M
3:12 | 9:17/mi
FINISH
3:39:08
26.22 mi
Rank: #17251 (+89)
25.2M → FINISH
8:13 | 8:04/mi

Splits & Pacing

Detailed breakdown of your race performance at each timing point

Half Splits

1st HalfFaster
via HALF
Distance13.11 mi
Time1:45:10
Pace8:02 /mi
2nd Half
Distance13.11 mi
Time1:53:58
Pace8:42 /mi
📊Positive Split: 8.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:07:3423:527:4123:52
7:41
-
10K
6.21 mi11:32:0348:217:4724:29
7:53
+0:12
15K
9.32 mi11:57:141:13:327:5425:11
8:07
+0:14
20K
12.43 mi12:23:201:39:388:0226:06
8:25
+0:18
HALF
13.11 mi12:28:521:45:108:025:32
8:08
-0:17
25K
15.53 mi12:49:192:05:378:0620:27
8:26
+0:18
30K
18.64 mi13:16:252:32:438:1227:06
8:44
+0:18
20M
20.00 mi13:28:332:44:518:1512:08
8:56
+0:12
21M
21.00 mi13:38:042:54:228:199:31
9:31
+0:35
35K
21.75 mi13:44:213:00:398:196:17
8:24
-1:07
23M
23.00 mi13:55:323:11:508:2111:11
8:57
+0:33
24M
24.00 mi14:04:053:20:238:218:33
8:33
-0:24
40K
24.85 mi14:11:253:27:438:227:20
8:35
+0:02
25.2M
25.20 mi14:14:373:30:558:233:12
9:17
+0:42
FINISH
26.22 mi14:22:503:39:088:228:13
8:04
-1:13

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

7:41 /mi

Average Pace

8:22 /mi

Slowest Pace

9:31 /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

1:27:17

40% of race

Time at Steady Pace

1:08:43

31% of race

Time at Slower Pace

1:03:08

29% of race

Average Pace: 8:21 /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 mi11:07:3423:527:4123:52
7:41
#14404
10K
6.21 mi11:32:0348:217:4724:29
7:53
#15322
15K
9.32 mi11:57:141:13:327:5425:11
8:07
#16168
20K
12.43 mi12:23:201:39:388:0226:06
8:25
#16923
HALF
13.11 mi12:28:521:45:108:025:32
8:08
#16986
25K
15.53 mi12:49:192:05:378:0620:27
8:26
#17181
30K
18.64 mi13:16:252:32:438:1227:06
8:44
#17335
20M
20.00 mi13:28:332:44:518:1512:08
8:56
#17435
21M
21.00 mi13:38:042:54:228:199:31
9:31
#17468
35K
21.75 mi13:44:213:00:398:196:17
8:24
#17441
23M
23.00 mi13:55:323:11:508:2111:11
8:57
#17476
24M
24.00 mi14:04:053:20:238:218:33
8:33
#17432
40K
24.85 mi14:11:253:27:438:227:20
8:35
#17360
25.2M
25.20 mi14:14:373:30:558:233:12
9:17
#17340
FINISH
26.22 mi14:22:503:39:088:228:13
8:04
#17251
Faster pace
Steady pace
Slower pace

Rankings

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

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi144044315431517757(Top 61%)6338(Top 50%)6338(Top 355%)
10K6.21 mi3.10 mi15322-9184915-6004915-60016316(Top 56%)5509(Top 44%)5509(Top 308%)
15K9.32 mi3.11 mi16168-8465440-5255440-52517757(Top 61%)6338(Top 50%)6338(Top 355%)
20K12.43 mi3.11 mi16923-7555890-4505890-45018722(Top 65%)6921(Top 55%)6921(Top 388%)
HALF13.11 mi0.68 mi16986-635927-375927-3717938(Top 62%)6428(Top 51%)6428(Top 360%)
25K15.53 mi2.42 mi17181-1956033-1066033-10618174(Top 63%)6670(Top 53%)6670(Top 373%)
30K18.64 mi3.11 mi17335-1546153-1206153-12018156(Top 63%)6761(Top 54%)6761(Top 379%)
20M20.00 mi1.36 mi17435-1006222-696222-6918618(Top 64%)7081(Top 56%)7081(Top 396%)
21M21.00 mi1.00 mi17468-336263-416263-4118598(Top 64%)7109(Top 57%)7109(Top 398%)
35K21.75 mi0.75 mi17441+276263626317054(Top 59%)6362(Top 51%)6362(Top 356%)
23M23.00 mi1.25 mi17476-356306-436306-4318200(Top 63%)7059(Top 56%)7059(Top 395%)
24M24.00 mi1.00 mi17432+446312-66312-617194(Top 59%)6582(Top 52%)6582(Top 369%)
40K24.85 mi0.85 mi17360+726287+256287+2516187(Top 56%)6081(Top 48%)6081(Top 340%)
25.2M25.20 mi0.35 mi17340+206285+26285+216285(Top 56%)6121(Top 49%)6121(Top 343%)
FINISH26.22 mi1.02 mi17251+896259+266259+2615604(Top 54%)5739(Top 46%)5739(Top 321%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 61%
×21
+97ft-345ft

Overall

17757

Females

6338

F45-49

6338

5K→10K

3.1 - 6.2 mi

Top 56%
×5
+79ft-138ft

Overall

16316

Females

5509

F45-49

5509

10K→15K

6.2 - 9.3 mi

Top 61%
×3
+67ft-78ft

Overall

17757

Females

6338

F45-49

6338

15K→20K

9.3 - 12.4 mi

Top 65%
×5
+106ft-86ft

Overall

18722

Females

6921

F45-49

6921

20K→HALF

12.4 - 13.1 mi

Top 62%
×2
+19ft-37ft

Overall

17938

Females

6428

F45-49

6428

HALF→25K

13.1 - 15.5 mi

Top 63%
×4
+66ft-88ft

Overall

18174

Females

6670

F45-49

6670

25K→30K

15.5 - 18.6 mi

Top 63%
×9
+181ft-148ft

Overall

18156

Females

6761

F45-49

6761

30K→20M

18.6 - 20.0 mi

Top 64%
×5
+64ft-50ft

Overall

18618

Females

7081

F45-49

7081

20M→21M

20.0 - 21.0 mi

Top 64%
×8
+106ft-24ft

Overall

18598

Females

7109

F45-49

7109

21M→35K

21.0 - 21.8 mi

Top 59%
×7
+17ft-86ft

Overall

17054

Females

6362

F45-49

6362

35K→23M

21.8 - 23.0 mi

Top 63%
×5
+23ft-63ft

Overall

18200

Females

7059

F45-49

7059

23M→24M

23.0 - 24.0 mi

Top 59%
×6
+12ft-82ft

Overall

17194

Females

6582

F45-49

6582

24M→40K

24.0 - 24.9 mi

Top 56%
×1
+6ft-20ft

Overall

16187

Females

6081

F45-49

6081

40K→25.2M

24.9 - 25.2 mi

Top 56%
×1
+13ft-16ft

Overall

16285

Females

6121

F45-49

6121

25.2M→FINISH

25.2 - 26.2 mi

Top 54%
×2
+22ft-21ft

Overall

15604

Females

5739

F45-49

5739

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
1020
Passed By
1621
Net Change
-2847
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#14404
5K → 10K62200-918#14404#15322
10K → 15K44200-846#15322#16168
15K → 20K40200-755#16168#16923
20K → HALF1881-63#16923#16986
HALF → 25K78200-195#16986#17181
25K → 30K154200-154#17181#17335
30K → 20M62162-100#17335#17435
20M → 21M6598-33#17435#17468
21M → 35K6841+27#17468#17441
35K → 23M83118-35#17441#17476
23M → 24M9147+44#17476#17432
24M → 40K9523+72#17432#17360
40K → 25.2M4020+20#17360#17340
25.2M → FINISH12031+89#17340#17251
TOTALS10201621-2847
📊

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