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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing
BOSTON MARATHON 2026

Pei Chun Tsai

Bib: 22976 •F •Age: N/A

Boston Marathon logo
0:00
0:00
/ mi
Masters
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Overall
#0 / 29021
Gender (Female)
#0 / 12578
Masters (Masters Women)
#0 / 6862
Top 39%
Age Group (F45-49)
#0 / 1786
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
25:31
3.11 mi
Rank: #18299
Start → 5K
25:31 | 8:13/mi
10K
50:39
6.21 mi
Rank: #18114 (+185)
5K → 10K
25:08 | 8:06/mi
15K
1:16:13
9.32 mi
Rank: #18256 (-142)
10K → 15K
25:34 | 8:14/mi
20K
1:42:03
12.43 mi
Rank: #18236 (+20)
15K → 20K
25:50 | 8:19/mi
HALF
1:47:38
13.11 mi
Rank: #18237 (-1)
20K → HALF
5:35 | 8:12/mi
25K
2:08:16
15.53 mi
Rank: #18291 (-54)
HALF → 25K
20:38 | 8:31/mi
30K
2:34:58
18.64 mi
Rank: #18112 (+179)
25K → 30K
26:42 | 8:36/mi
20M
2:46:48
20.00 mi
Rank: #18027 (+85)
30K → 20M
11:50 | 8:43/mi
21M
2:56:00
21.00 mi
Rank: #17978 (+49)
20M → 21M
9:12 | 9:12/mi
35K
3:02:18
21.75 mi
Rank: #17925 (+53)
21M → 35K
6:18 | 8:26/mi
23M
3:13:06
23.00 mi
Rank: #17801 (+124)
35K → 23M
10:48 | 8:38/mi
24M
3:21:30
24.00 mi
Rank: #17740 (+61)
23M → 24M
8:24 | 8:24/mi
40K
3:28:43
24.85 mi
Rank: #17625 (+115)
24M → 40K
7:13 | 8:27/mi
25.2M
3:31:51
25.20 mi
Rank: #17563 (+62)
40K → 25.2M
3:08 | 9:06/mi
FINISH
3:40:12
26.22 mi
Rank: #17511 (+52)
25.2M → FINISH
8:21 | 8:12/mi

Splits & Pacing

Detailed breakdown of your race performance at each timing point

Half Splits

1st HalfFaster
via HALF
Distance13.11 mi
Time1:47:38
Pace8:13 /mi
2nd Half
Distance13.11 mi
Time1:52:34
Pace8:36 /mi
📊Positive Split: 4.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:27:5825:318:1325:31
8:13
-
10K
6.21 mi11:53:0650:398:1025:08
8:06
-0:07
15K
9.32 mi12:18:401:16:138:1125:34
8:14
+0:08
20K
12.43 mi12:44:301:42:038:1325:50
8:19
+0:05
HALF
13.11 mi12:50:051:47:388:135:35
8:12
-0:07
25K
15.53 mi13:10:432:08:168:1620:38
8:31
+0:19
30K
18.64 mi13:37:252:34:588:1926:42
8:36
+0:05
20M
20.00 mi13:49:152:46:488:2111:50
8:43
+0:07
21M
21.00 mi13:58:272:56:008:239:12
9:12
+0:29
35K
21.75 mi14:04:453:02:188:236:18
8:26
-0:46
23M
23.00 mi14:15:333:13:068:2410:48
8:38
+0:12
24M
24.00 mi14:23:573:21:308:248:24
8:24
-0:14
40K
24.85 mi14:31:103:28:438:247:13
8:27
+0:03
25.2M
25.20 mi14:34:183:31:518:253:08
9:06
+0:39
FINISH
26.22 mi14:42:393:40:128:258:21
8:12
-0:54

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

8:06 /mi

Average Pace

8:24 /mi

Slowest Pace

9:12 /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

3:27:52

94% of race

Time at Steady Pace

12:20

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:24 /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 mi11:27:5825:318:1325:31
8:13
#18299
10K
6.21 mi11:53:0650:398:1025:08
8:06
#18114
15K
9.32 mi12:18:401:16:138:1125:34
8:14
#18256
20K
12.43 mi12:44:301:42:038:1325:50
8:19
#18236
HALF
13.11 mi12:50:051:47:388:135:35
8:12
#18237
25K
15.53 mi13:10:432:08:168:1620:38
8:31
#18291
30K
18.64 mi13:37:252:34:588:1926:42
8:36
#18112
20M
20.00 mi13:49:152:46:488:2111:50
8:43
#18027
21M
21.00 mi13:58:272:56:008:239:12
9:12
#17978
35K
21.75 mi14:04:453:02:188:236:18
8:26
#17925
23M
23.00 mi14:15:333:13:068:2410:48
8:38
#17801
24M
24.00 mi14:23:573:21:308:248:24
8:24
#17740
40K
24.85 mi14:31:103:28:438:247:13
8:27
#17625
25.2M
25.20 mi14:34:183:31:518:253:08
9:06
#17563
FINISH
26.22 mi14:42:393:40:128:258:21
8:12
#17511
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 mi182996681668118548(Top 64%)6785(Top 54%)6785(Top 380%)
10K6.21 mi3.10 mi18114+1856567+1146567+11417905(Top 62%)6436(Top 51%)6436(Top 360%)
15K9.32 mi3.11 mi18256-1426630-636630-6318548(Top 64%)6785(Top 54%)6785(Top 380%)
20K12.43 mi3.11 mi18236+206618+126618+1218220(Top 63%)6641(Top 53%)6641(Top 372%)
HALF13.11 mi0.68 mi18237-16618661818383(Top 63%)6695(Top 53%)6695(Top 375%)
25K15.53 mi2.42 mi18291-546666-486666-4818634(Top 64%)6920(Top 55%)6920(Top 387%)
30K18.64 mi3.11 mi18112+1796600+666600+6617455(Top 60%)6373(Top 51%)6373(Top 357%)
20M20.00 mi1.36 mi18027+856578+226578+2217472(Top 60%)6452(Top 51%)6452(Top 361%)
21M21.00 mi1.00 mi17978+496563+156563+1517172(Top 59%)6362(Top 51%)6362(Top 356%)
35K21.75 mi0.75 mi17925+536543+206543+2017181(Top 59%)6442(Top 51%)6442(Top 361%)
23M23.00 mi1.25 mi17801+1246507+366507+3616509(Top 57%)6149(Top 49%)6149(Top 344%)
24M24.00 mi1.00 mi17740+616484+236484+2316349(Top 56%)6099(Top 48%)6099(Top 341%)
40K24.85 mi0.85 mi17625+1156431+536431+5315332(Top 53%)5621(Top 45%)5621(Top 315%)
25.2M25.20 mi0.35 mi17563+626407+246407+2415290(Top 53%)5611(Top 45%)5611(Top 314%)
FINISH26.22 mi1.02 mi17511+526401+66401+616419(Top 57%)6181(Top 49%)6181(Top 346%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 64%
×21
+97ft-345ft

Overall

18548

Females

6785

F45-49

6785

5K→10K

3.1 - 6.2 mi

Top 62%
×5
+79ft-138ft

Overall

17905

Females

6436

F45-49

6436

10K→15K

6.2 - 9.3 mi

Top 64%
×3
+67ft-78ft

Overall

18548

Females

6785

F45-49

6785

15K→20K

9.3 - 12.4 mi

Top 63%
×5
+106ft-86ft

Overall

18220

Females

6641

F45-49

6641

20K→HALF

12.4 - 13.1 mi

Top 63%
×2
+19ft-37ft

Overall

18383

Females

6695

F45-49

6695

HALF→25K

13.1 - 15.5 mi

Top 64%
×4
+66ft-88ft

Overall

18634

Females

6920

F45-49

6920

25K→30K

15.5 - 18.6 mi

Top 60%
×9
+181ft-148ft

Overall

17455

Females

6373

F45-49

6373

30K→20M

18.6 - 20.0 mi

Top 60%
×5
+64ft-50ft

Overall

17472

Females

6452

F45-49

6452

20M→21M

20.0 - 21.0 mi

Top 59%
×8
+106ft-24ft

Overall

17172

Females

6362

F45-49

6362

21M→35K

21.0 - 21.8 mi

Top 59%
×7
+17ft-86ft

Overall

17181

Females

6442

F45-49

6442

35K→23M

21.8 - 23.0 mi

Top 57%
×5
+23ft-63ft

Overall

16509

Females

6149

F45-49

6149

23M→24M

23.0 - 24.0 mi

Top 56%
×6
+12ft-82ft

Overall

16349

Females

6099

F45-49

6099

24M→40K

24.0 - 24.9 mi

Top 53%
×1
+6ft-20ft

Overall

15332

Females

5621

F45-49

5621

40K→25.2M

24.9 - 25.2 mi

Top 53%
×1
+13ft-16ft

Overall

15290

Females

5611

F45-49

5611

25.2M→FINISH

25.2 - 26.2 mi

Top 57%
×2
+22ft-21ft

Overall

16419

Females

6181

F45-49

6181

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
1970*
Passed By
1105
Net Change
+788
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#18299
5K → 10K385*200+185#18299#18114
10K → 15K135200-142#18114#18256
15K → 20K174154+20#18256#18236
20K → HALF3031-1#18236#18237
HALF → 25K108162-54#18237#18291
25K → 30K271*92+179#18291#18112
30K → 20M14156+85#18112#18027
20M → 21M9849+49#18027#17978
21M → 35K7926+53#17978#17925
35K → 23M15632+124#17925#17801
23M → 24M9332+61#17801#17740
24M → 40K14025+115#17740#17625
40K → 25.2M697+62#17625#17563
25.2M → FINISH9139+52#17563#17511
TOTALS1970*1105+788

* 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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