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BOSTON MARATHON 2023

Yaan Tsai

Bib: 9155•F

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0:00
0:00
/ mi
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Overall
#0 / 26622
Top 29%
Gender (Female)
#0 / 11423
Top 10%
Age Group (F18-39)
#0 / 4884
Top 19%
Race Day Weather
49°/39°F
light intensity drizzle

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
21:25
Rank: #5530
Start → 5K
21:25 | 6:54/mi
10K· 6.21 mi
43:00
Rank: #5988 (-458)
5K → 10K
21:35 | 6:57/mi
15K· 9.32 mi
1:05:03
Rank: #6378 (-390)
10K → 15K
22:03 | 7:06/mi
20K· 12.43 mi
1:28:49
Rank: #7207 (-829)
15K → 20K
23:46 | 7:39/mi
Half· 13.11 mi
1:34:13
Rank: #7465 (-258)
20K → Half
5:24 | 7:55/mi
25K· 15.53 mi
1:52:49
Rank: #7812 (-347)
Half → 25K
18:36 | 7:40/mi
30K· 18.64 mi
2:17:04
Rank: #8043 (-231)
25K → 30K
24:15 | 7:48/mi
20M
2:27:33
Rank: #7999 (+44)
30K → 20M
10:29 | 7:43/mi
21M
2:35:32
Rank: #7920 (+79)
20M → 21M
7:59 | 7:59/mi
35K· 21.75 mi
2:40:58
Rank: #7859 (+61)
21M → 35K
5:26 | 7:16/mi
23M
2:50:32
Rank: #7805 (+54)
35K → 23M
9:34 | 7:38/mi
24M
2:58:00
Rank: #7759 (+46)
23M → 24M
7:28 | 7:28/mi
40K· 24.85 mi
3:04:33
Rank: #7752 (+7)
24M → 40K
6:33 | 7:40/mi
25.2M
3:07:20
Rank: #7715 (+37)
40K → 25.2M
2:47 | 8:04/mi
Finish· 26.22 mi
3:15:00
Rank: #7733 (-18)
25.2M → Finish
7:40 | 7:31/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
Pace7:11 /mi
2nd Half
Distance13.11 mi
Time1:40:47
Pace7:41 /mi
📊Positive Split: 7.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:46:4621:256:5421:25
6:54
-
10K
6.21 mi11:08:2143:006:5521:35
6:57
+0:03
15K
9.32 mi11:30:241:05:036:5922:03
7:06
+0:09
20K
12.43 mi11:54:101:28:497:0923:46
7:39
+0:33
Half
13.11 mi11:59:341:34:137:115:24
7:55
+0:16
25K
15.53 mi12:18:101:52:497:1618:36
7:40
-0:15
30K
18.64 mi12:42:252:17:047:2124:15
7:48
+0:08
20M
20.00 mi12:52:542:27:337:2310:29
7:43
-0:05
21M
21.00 mi13:00:532:35:327:247:59
7:59
+0:16
35K
21.75 mi13:06:192:40:587:245:26
7:16
-0:43
23M
23.00 mi13:15:532:50:327:259:34
7:38
+0:22
24M
24.00 mi13:23:212:58:007:257:28
7:28
-0:10
40K
24.85 mi13:29:543:04:337:266:33
7:40
+0:12
25.2M
25.20 mi13:32:413:07:207:262:47
8:04
+0:24
Finish
26.22 mi13:40:213:15:007:277:40
7:31
-0:33

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

6:54 /mi

Average Pace

7:27 /mi

Slowest Pace

8:04 /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

1:25:37

44% of race

Time at Steady Pace

1:49:23

56% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:26 /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 mi10:46:4621:256:5421:25
6:54
#5530
10K
6.21 mi11:08:2143:006:5521:35
6:57
#5988
15K
9.32 mi11:30:241:05:036:5922:03
7:06
#6378
20K
12.43 mi11:54:101:28:497:0923:46
7:39
#7207
Half
13.11 mi11:59:341:34:137:115:24
7:55
#7465
25K
15.53 mi12:18:101:52:497:1618:36
7:40
#7812
30K
18.64 mi12:42:252:17:047:2124:15
7:48
#8043
20M
20.00 mi12:52:542:27:337:2310:29
7:43
#7999
21M
21.00 mi13:00:532:35:327:247:59
7:59
#7920
35K
21.75 mi13:06:192:40:587:245:26
7:16
#7859
23M
23.00 mi13:15:532:50:327:259:34
7:38
#7805
24M
24.00 mi13:23:212:58:007:257:28
7:28
#7759
40K
24.85 mi13:29:543:04:337:266:33
7:40
#7752
25.2M
25.20 mi13:32:413:07:207:262:47
8:04
#7715
Finish
26.22 mi13:40:213:15:007:277:40
7:31
#7733
Faster pace
Steady pace
Slower pace

Rankings

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

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi55304284287155(Top 27%)793(Top 7%)793(Top 16%)
10K6.21 mi3.10 mi5988-458506-78506-786479(Top 24%)637(Top 6%)637(Top 13%)
15K9.32 mi3.11 mi6378-390601-95601-957155(Top 27%)793(Top 7%)793(Top 16%)
20K12.43 mi3.11 mi7207-829801-200801-20010537(Top 40%)2169(Top 19%)2169(Top 44%)
Half13.11 mi0.68 mi7465-258871-70871-7013798(Top 52%)3983(Top 35%)3983(Top 82%)
25K15.53 mi2.42 mi7812-3471009-1381009-13810108(Top 38%)2048(Top 18%)2048(Top 42%)
30K18.64 mi3.11 mi8043-2311134-1251134-1259421(Top 35%)1903(Top 17%)1903(Top 39%)
20M20.00 mi1.36 mi7999+44113411348335(Top 31%)1539(Top 13%)1539(Top 32%)
21M21.00 mi1.00 mi7920+791117+171117+177303(Top 27%)1250(Top 11%)1250(Top 26%)
35K21.75 mi0.75 mi7859+611106+111106+116967(Top 26%)1107(Top 10%)1107(Top 23%)
23M23.00 mi1.25 mi7805+541115-91115-97414(Top 28%)1354(Top 12%)1354(Top 28%)
24M24.00 mi1.00 mi7759+461121-61121-67533(Top 28%)1512(Top 13%)1512(Top 31%)
40K24.85 mi0.85 mi7752+71128-71128-77774(Top 29%)1679(Top 15%)1679(Top 34%)
25.2M25.20 mi0.35 mi7715+371129-11129-17054(Top 26%)1474(Top 13%)1474(Top 30%)
Finish26.22 mi1.02 mi7733-181157-281157-288781(Top 33%)2160(Top 19%)2160(Top 44%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 27%
×21stories
+97ft-345ft

Overall

7155

Females

793

F18-39

793

5K→10K

3.1 - 6.2 mi

Top 24%
×5stories
+79ft-138ft

Overall

6479

Females

637

F18-39

637

10K→15K

6.2 - 9.3 mi

Top 27%
×3stories
+67ft-78ft

Overall

7155

Females

793

F18-39

793

15K→20K

9.3 - 12.4 mi

Top 40%
×5stories
+106ft-86ft

Overall

10537

Females

2169

F18-39

2169

20K→Half

12.4 - 13.1 mi

Top 52%
×2stories
+19ft-37ft

Overall

13798

Females

3983

F18-39

3983

Half→25K

13.1 - 15.5 mi

Top 38%
×4stories
+66ft-88ft

Overall

10108

Females

2048

F18-39

2048

25K→30K

15.5 - 18.6 mi

Top 35%
×9stories
+181ft-148ft

Overall

9421

Females

1903

F18-39

1903

30K→20M

18.6 - 20.0 mi

Top 31%
×5stories
+64ft-50ft

Overall

8335

Females

1539

F18-39

1539

20M→21M

20.0 - 21.0 mi

Top 27%
×8stories
+106ft-24ft

Overall

7303

Females

1250

F18-39

1250

21M→35K

21.0 - 21.8 mi

Top 26%
×7stories
+17ft-86ft

Overall

6967

Females

1107

F18-39

1107

35K→23M

21.8 - 23.0 mi

Top 28%
×5stories
+23ft-63ft

Overall

7414

Females

1354

F18-39

1354

23M→24M

23.0 - 24.0 mi

Top 28%
×6stories
+12ft-82ft

Overall

7533

Females

1512

F18-39

1512

24M→40K

24.0 - 24.9 mi

Top 29%
×1story
+6ft-20ft

Overall

7774

Females

1679

F18-39

1679

40K→25.2M

24.9 - 25.2 mi

Top 26%
×1story
+13ft-16ft

Overall

7054

Females

1474

F18-39

1474

25.2M→Finish

25.2 - 26.2 mi

Top 33%
×2stories
+22ft-21ft

Overall

8781

Females

2160

F18-39

2160

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
821
Passed By
3024
Net Change
-2203
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#5530
5K → 10K55513-458#5530#5988
10K → 15K26416-390#5988#6378
15K → 20K12841-829#6378#7207
20K → Half0258-258#7207#7465
Half → 25K23370-347#7465#7812
25K → 30K61292-231#7812#8043
30K → 20M10258+44#8043#7999
20M → 21M11435+79#7999#7920
21M → 35K7615+61#7920#7859
35K → 23M9844+54#7859#7805
23M → 24M8640+46#7805#7759
24M → 40K6558+7#7759#7752
40K → 25.2M447+37#7752#7715
25.2M → Finish5977-18#7715#7733
TOTALS8213024-2203
📊

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