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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing
BOSTON MARATHON 2026

Sejeong Choi

Bib: 21389 •F •Age: N/A

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0:00
0:00
/ mi
Masters
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Overall
#0 / 29021
Gender (Female)
#0 / 12578
Masters (Masters Women)
#0 / 6862
Top 42%
Age Group (F45-49)
#0 / 1786
Race Day Weather
51°/41°F
overcast clouds
Personalized for Sejeong

Your Race Performance Report is ready

See how your race unfolded, where your performance changed, and what to focus on next.

Personalized by MyRace AI
Preview insight
Your pace by distance
Fastest segment · 8:01/mi at mile 6.2

Your report includes

  • Race Overview
  • Pacing & Splits
  • Performance Analysis
  • Segment Analysis
  • Passing Analysis
  • Potential Focus Areas
One-time purchase · Instant access · Downloadable PDF · Shareable report

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
28:18
3.11 mi
Rank: #23103
Start → 5K
28:18 | 9:07/mi
10K
53:11
6.21 mi
Rank: #20492 (+2611)
5K → 10K
24:53 | 8:01/mi
15K
1:19:03
9.32 mi
Rank: #20037 (+455)
10K → 15K
25:52 | 8:20/mi
20K
1:44:03
12.43 mi
Rank: #19213 (+824)
15K → 20K
25:00 | 8:03/mi
HALF
1:49:43
13.11 mi
Rank: #19203 (+10)
20K → HALF
5:40 | 8:19/mi
25K
2:09:27
15.53 mi
Rank: #18735 (+468)
HALF → 25K
19:44 | 8:09/mi
30K
2:35:27
18.64 mi
Rank: #18273 (+462)
25K → 30K
26:00 | 8:23/mi
20M
2:47:08
20.00 mi
Rank: #18134 (+139)
30K → 20M
11:41 | 8:37/mi
21M
2:56:51
21.00 mi
Rank: #18200 (-66)
20M → 21M
9:43 | 9:43/mi
35K
3:03:14
21.75 mi
Rank: #18190 (+10)
21M → 35K
6:23 | 8:32/mi
23M
3:14:08
23.00 mi
Rank: #18094 (+96)
35K → 23M
10:54 | 8:43/mi
24M
3:22:49
24.00 mi
Rank: #18081 (+13)
23M → 24M
8:41 | 8:41/mi
40K
3:30:12
24.85 mi
Rank: #17995 (+86)
24M → 40K
7:23 | 8:39/mi
25.2M
3:33:28
25.20 mi
Rank: #17983 (+12)
40K → 25.2M
3:16 | 9:29/mi
FINISH
3:41:50
26.22 mi
Rank: #17912 (+71)
25.2M → FINISH
8:22 | 8:13/mi

Splits & Pacing

Detailed breakdown of your race performance at each timing point

Half Splits

1st HalfFaster
via HALF
Distance13.11 mi
Time1:49:43
Pace8:23 /mi
2nd Half
Distance13.11 mi
Time1:52:07
Pace8:34 /mi
📊Positive Split: 2.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:50:1928:189:0728:18
9:07
-
10K
6.21 mi12:15:1253:118:3424:53
8:01
-1:06
15K
9.32 mi12:41:041:19:038:2925:52
8:20
+0:19
20K
12.43 mi13:06:041:44:038:2325:00
8:03
-0:17
HALF
13.11 mi13:11:441:49:438:235:40
8:19
+0:16
25K
15.53 mi13:31:282:09:278:2019:44
8:09
-0:10
30K
18.64 mi13:57:282:35:278:2126:00
8:23
+0:14
20M
20.00 mi14:09:092:47:088:2211:41
8:37
+0:14
21M
21.00 mi14:18:522:56:518:269:43
9:43
+1:06
35K
21.75 mi14:25:153:03:148:266:23
8:32
-1:11
23M
23.00 mi14:36:093:14:088:2710:54
8:43
+0:11
24M
24.00 mi14:44:503:22:498:288:41
8:41
-0:02
40K
24.85 mi14:52:133:30:128:287:23
8:39
-0:02
25.2M
25.20 mi14:55:293:33:288:293:16
9:29
+0:50
FINISH
26.22 mi15:03:513:41:508:298:22
8:13
-1:16

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

8:01 /mi

Average Pace

8:28 /mi

Slowest Pace

9:43 /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

1:17:59

35% of race

Time at Steady Pace

1:42:34

46% of race

Time at Slower Pace

41:17

19% of race

Average Pace: 8:28 /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 mi11:50:1928:189:0728:18
9:07
#23103
10K
6.21 mi12:15:1253:118:3424:53
8:01
#20492
15K
9.32 mi12:41:041:19:038:2925:52
8:20
#20037
20K
12.43 mi13:06:041:44:038:2325:00
8:03
#19213
HALF
13.11 mi13:11:441:49:438:235:40
8:19
#19203
25K
15.53 mi13:31:282:09:278:2019:44
8:09
#18735
30K
18.64 mi13:57:282:35:278:2126:00
8:23
#18273
20M
20.00 mi14:09:092:47:088:2211:41
8:37
#18134
21M
21.00 mi14:18:522:56:518:269:43
9:43
#18200
35K
21.75 mi14:25:153:03:148:266:23
8:32
#18190
23M
23.00 mi14:36:093:14:088:2710:54
8:43
#18094
24M
24.00 mi14:44:503:22:498:288:41
8:41
#18081
40K
24.85 mi14:52:133:30:128:287:23
8:39
#17995
25.2M
25.20 mi14:55:293:33:288:293:16
9:29
#17983
FINISH
26.22 mi15:03:513:41:508:298:22
8:13
#17912
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 mi231039224922419137(Top 66%)7113(Top 57%)7113(Top 398%)
10K6.21 mi3.10 mi20492+26117877+13477877+134717331(Top 60%)6111(Top 49%)6111(Top 342%)
15K9.32 mi3.11 mi20037+4557627+2507627+25019137(Top 66%)7113(Top 57%)7113(Top 398%)
20K12.43 mi3.11 mi19213+8247176+4517176+45116487(Top 57%)5651(Top 45%)5651(Top 316%)
HALF13.11 mi0.68 mi19203+107172+47172+419134(Top 66%)7105(Top 56%)7105(Top 398%)
25K15.53 mi2.42 mi18735+4686916+2566916+25616406(Top 57%)5659(Top 45%)5659(Top 317%)
30K18.64 mi3.11 mi18273+4626692+2246692+22416096(Top 55%)5579(Top 44%)5579(Top 312%)
20M20.00 mi1.36 mi18134+1396642+506642+5016826(Top 58%)6109(Top 49%)6109(Top 342%)
21M21.00 mi1.00 mi18200-666696-546696-5419444(Top 67%)7553(Top 60%)7553(Top 423%)
35K21.75 mi0.75 mi18190+106696669617779(Top 61%)6770(Top 54%)6770(Top 379%)
23M23.00 mi1.25 mi18094+966668+286668+2816982(Top 59%)6426(Top 51%)6426(Top 360%)
24M24.00 mi1.00 mi18081+136676-86676-817937(Top 62%)6960(Top 55%)6960(Top 390%)
40K24.85 mi0.85 mi17995+866650+266650+2616513(Top 57%)6263(Top 50%)6263(Top 351%)
25.2M25.20 mi0.35 mi17983+126647+36647+317244(Top 59%)6643(Top 53%)6643(Top 372%)
FINISH26.22 mi1.02 mi17912+716627+206627+2016506(Top 57%)6230(Top 50%)6230(Top 349%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 66%
×21
+97ft-345ft

Overall

19137

Females

7113

F45-49

7113

5K→10K

3.1 - 6.2 mi

Top 60%
×5
+79ft-138ft

Overall

17331

Females

6111

F45-49

6111

10K→15K

6.2 - 9.3 mi

Top 66%
×3
+67ft-78ft

Overall

19137

Females

7113

F45-49

7113

15K→20K

9.3 - 12.4 mi

Top 57%
×5
+106ft-86ft

Overall

16487

Females

5651

F45-49

5651

20K→HALF

12.4 - 13.1 mi

Top 66%
×2
+19ft-37ft

Overall

19134

Females

7105

F45-49

7105

HALF→25K

13.1 - 15.5 mi

Top 57%
×4
+66ft-88ft

Overall

16406

Females

5659

F45-49

5659

25K→30K

15.5 - 18.6 mi

Top 55%
×9
+181ft-148ft

Overall

16096

Females

5579

F45-49

5579

30K→20M

18.6 - 20.0 mi

Top 58%
×5
+64ft-50ft

Overall

16826

Females

6109

F45-49

6109

20M→21M

20.0 - 21.0 mi

Top 67%
×8
+106ft-24ft

Overall

19444

Females

7553

F45-49

7553

21M→35K

21.0 - 21.8 mi

Top 61%
×7
+17ft-86ft

Overall

17779

Females

6770

F45-49

6770

35K→23M

21.8 - 23.0 mi

Top 59%
×5
+23ft-63ft

Overall

16982

Females

6426

F45-49

6426

23M→24M

23.0 - 24.0 mi

Top 62%
×6
+12ft-82ft

Overall

17937

Females

6960

F45-49

6960

24M→40K

24.0 - 24.9 mi

Top 57%
×1
+6ft-20ft

Overall

16513

Females

6263

F45-49

6263

40K→25.2M

24.9 - 25.2 mi

Top 59%
×1
+13ft-16ft

Overall

17244

Females

6643

F45-49

6643

25.2M→FINISH

25.2 - 26.2 mi

Top 57%
×2
+22ft-21ft

Overall

16506

Females

6230

F45-49

6230

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
5688*
Passed By
497
Net Change
+5191
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#23103
5K → 10K2612*1+2611#23103#20492
10K → 15K503*48+455#20492#20037
15K → 20K829*5+824#20037#19213
20K → HALF3626+10#19213#19203
HALF → 25K475*7+468#19203#18735
25K → 30K471*9+462#18735#18273
30K → 20M17435+139#18273#18134
20M → 21M63129-66#18134#18200
21M → 35K5040+10#18200#18190
35K → 23M14650+96#18190#18094
23M → 24M7562+13#18094#18081
24M → 40K11226+86#18081#17995
40K → 25.2M3624+12#17995#17983
25.2M → FINISH10635+71#17983#17912
TOTALS5688*497+5191

* 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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