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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing
BOSTON MARATHON 2026

Samantha Kempner

Bib: 20531 •F •Age: N/A

MI

Boston Marathon logo
0:00
0:00
/ mi
Masters
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Overall
#0 / 29021
Gender (Female)
#0 / 12578
Top 44%
Masters (Masters Women)
#0 / 6862
Top 30%
Age Group (F45-49)
#0 / 1786
Top 37%
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
24:33
3.11 mi
Rank: #16225
Start → 5K
24:33 | 7:55/mi
10K
49:13
6.21 mi
Rank: #16481 (-256)
5K → 10K
24:40 | 7:57/mi
15K
1:13:33
9.32 mi
Rank: #16188 (+293)
10K → 15K
24:20 | 7:50/mi
20K
1:38:12
12.43 mi
Rank: #16030 (+158)
15K → 20K
24:39 | 7:57/mi
HALF
1:43:32
13.11 mi
Rank: #16012 (+18)
20K → HALF
5:20 | 7:50/mi
25K
2:02:58
15.53 mi
Rank: #15907 (+105)
HALF → 25K
19:26 | 8:01/mi
30K
2:28:42
18.64 mi
Rank: #15822 (+85)
25K → 30K
25:44 | 8:17/mi
20M
2:40:20
20.00 mi
Rank: #15872 (-50)
30K → 20M
11:38 | 8:34/mi
21M
2:49:20
21.00 mi
Rank: #15858 (+14)
20M → 21M
9:00 | 9:00/mi
35K
2:55:37
21.75 mi
Rank: #15873 (-15)
21M → 35K
6:17 | 8:24/mi
23M
3:06:31
23.00 mi
Rank: #15922 (-49)
35K → 23M
10:54 | 8:43/mi
24M
3:15:04
24.00 mi
Rank: #15972 (-50)
23M → 24M
8:33 | 8:33/mi
40K
3:22:30
24.85 mi
Rank: #15982 (-10)
24M → 40K
7:26 | 8:42/mi
25.2M
3:25:44
25.20 mi
Rank: #15984 (-2)
40K → 25.2M
3:14 | 9:23/mi
FINISH
3:34:11
26.22 mi
Rank: #16006 (-22)
25.2M → FINISH
8:27 | 8:18/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
Time1:43:32
Pace7:54 /mi
2nd Half
Distance13.11 mi
Time1:50:39
Pace8:27 /mi
📊Positive Split: 6.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:11:5124:337:5524:33
7:55
-
10K
6.21 mi11:36:3149:137:5624:40
7:57
+0:02
15K
9.32 mi12:00:511:13:337:5424:20
7:50
-0:07
20K
12.43 mi12:25:301:38:127:5524:39
7:57
+0:07
HALF
13.11 mi12:30:501:43:327:545:20
7:50
-0:07
25K
15.53 mi12:50:162:02:587:5519:26
8:01
+0:11
30K
18.64 mi13:16:002:28:427:5925:44
8:17
+0:16
20M
20.00 mi13:27:382:40:208:0211:38
8:34
+0:17
21M
21.00 mi13:36:382:49:208:049:00
9:00
+0:26
35K
21.75 mi13:42:552:55:378:056:17
8:24
-0:36
23M
23.00 mi13:53:493:06:318:0710:54
8:43
+0:19
24M
24.00 mi14:02:223:15:048:088:33
8:33
-0:10
40K
24.85 mi14:09:483:22:308:097:26
8:42
+0:09
25.2M
25.20 mi14:13:023:25:448:103:14
9:23
+0:41
FINISH
26.22 mi14:21:293:34:118:118:27
8:18
-1:05

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

7:50 /mi

Average Pace

8:10 /mi

Slowest Pace

9:23 /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

3:03:37

86% of race

Time at Steady Pace

27:20

13% of race

Time at Slower Pace

3:14

2% of race

Average Pace: 8:10 /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 mi11:11:5124:337:5524:33
7:55
#16225
10K
6.21 mi11:36:3149:137:5624:40
7:57
#16481
15K
9.32 mi12:00:511:13:337:5424:20
7:50
#16188
20K
12.43 mi12:25:301:38:127:5524:39
7:57
#16030
HALF
13.11 mi12:30:501:43:327:545:20
7:50
#16012
25K
15.53 mi12:50:162:02:587:5519:26
8:01
#15907
30K
18.64 mi13:16:002:28:427:5925:44
8:17
#15822
20M
20.00 mi13:27:382:40:208:0211:38
8:34
#15872
21M
21.00 mi13:36:382:49:208:049:00
9:00
#15858
35K
21.75 mi13:42:552:55:378:056:17
8:24
#15873
23M
23.00 mi13:53:493:06:318:0710:54
8:43
#15922
24M
24.00 mi14:02:223:15:048:088:33
8:33
#15972
40K
24.85 mi14:09:483:22:308:097:26
8:42
#15982
25.2M
25.20 mi14:13:023:25:448:103:14
9:23
#15984
FINISH
26.22 mi14:21:293:34:118:118:27
8:18
#16006
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 mi162255461546115638(Top 54%)5136(Top 41%)5136(Top 288%)
10K6.21 mi3.10 mi16481-2565622-1615622-16116787(Top 58%)5790(Top 46%)5790(Top 324%)
15K9.32 mi3.11 mi16188+2935450+1725450+17215638(Top 54%)5136(Top 41%)5136(Top 288%)
20K12.43 mi3.11 mi16030+1585374+765374+7615647(Top 54%)5178(Top 41%)5178(Top 290%)
HALF13.11 mi0.68 mi16012+185371+35371+315823(Top 55%)5240(Top 42%)5240(Top 293%)
25K15.53 mi2.42 mi15907+1055311+605311+6015542(Top 54%)5165(Top 41%)5165(Top 289%)
30K18.64 mi3.11 mi15822+855298+135298+1315510(Top 53%)5252(Top 42%)5252(Top 294%)
20M20.00 mi1.36 mi15872-505345-475345-4716582(Top 57%)5960(Top 47%)5960(Top 334%)
21M21.00 mi1.00 mi15858+145353-85353-816141(Top 56%)5762(Top 46%)5762(Top 323%)
35K21.75 mi0.75 mi15873-155377-245377-2417040(Top 59%)6348(Top 50%)6348(Top 355%)
23M23.00 mi1.25 mi15922-495442-655442-6516969(Top 58%)6413(Top 51%)6413(Top 359%)
24M24.00 mi1.00 mi15972-505487-455487-4517179(Top 59%)6567(Top 52%)6567(Top 368%)
40K24.85 mi0.85 mi15982-105511-245511-2416840(Top 58%)6421(Top 51%)6421(Top 360%)
25.2M25.20 mi0.35 mi15984-25518-75518-716765(Top 58%)6371(Top 51%)6371(Top 357%)
FINISH26.22 mi1.02 mi16006-225554-365554-3617003(Top 59%)6511(Top 52%)6511(Top 365%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 54%
×21
+97ft-345ft

Overall

15638

Females

5136

F45-49

5136

5K→10K

3.1 - 6.2 mi

Top 58%
×5
+79ft-138ft

Overall

16787

Females

5790

F45-49

5790

10K→15K

6.2 - 9.3 mi

Top 54%
×3
+67ft-78ft

Overall

15638

Females

5136

F45-49

5136

15K→20K

9.3 - 12.4 mi

Top 54%
×5
+106ft-86ft

Overall

15647

Females

5178

F45-49

5178

20K→HALF

12.4 - 13.1 mi

Top 55%
×2
+19ft-37ft

Overall

15823

Females

5240

F45-49

5240

HALF→25K

13.1 - 15.5 mi

Top 54%
×4
+66ft-88ft

Overall

15542

Females

5165

F45-49

5165

25K→30K

15.5 - 18.6 mi

Top 53%
×9
+181ft-148ft

Overall

15510

Females

5252

F45-49

5252

30K→20M

18.6 - 20.0 mi

Top 57%
×5
+64ft-50ft

Overall

16582

Females

5960

F45-49

5960

20M→21M

20.0 - 21.0 mi

Top 56%
×8
+106ft-24ft

Overall

16141

Females

5762

F45-49

5762

21M→35K

21.0 - 21.8 mi

Top 59%
×7
+17ft-86ft

Overall

17040

Females

6348

F45-49

6348

35K→23M

21.8 - 23.0 mi

Top 58%
×5
+23ft-63ft

Overall

16969

Females

6413

F45-49

6413

23M→24M

23.0 - 24.0 mi

Top 59%
×6
+12ft-82ft

Overall

17179

Females

6567

F45-49

6567

24M→40K

24.0 - 24.9 mi

Top 58%
×1
+6ft-20ft

Overall

16840

Females

6421

F45-49

6421

40K→25.2M

24.9 - 25.2 mi

Top 58%
×1
+13ft-16ft

Overall

16765

Females

6371

F45-49

6371

25.2M→FINISH

25.2 - 26.2 mi

Top 59%
×2
+22ft-21ft

Overall

17003

Females

6511

F45-49

6511

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
1788*
Passed By
1343
Net Change
+219
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#16225
5K → 10K170200-256#16225#16481
10K → 15K384*91+293#16481#16188
15K → 20K266*108+158#16188#16030
20K → HALF4022+18#16030#16012
HALF → 25K19186+105#16012#15907
25K → 30K231*146+85#15907#15822
30K → 20M69119-50#15822#15872
20M → 21M10995+14#15872#15858
21M → 35K5267-15#15858#15873
35K → 23M90139-49#15873#15922
23M → 24M4797-50#15922#15972
24M → 40K5767-10#15972#15982
40K → 25.2M2931-2#15982#15984
25.2M → FINISH5375-22#15984#16006
TOTALS1788*1343+219

* 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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Qualifying & Age Grade

See how your performance stacks up against qualifying standards

OTQ

Olympic Trials Qualifying analysis available

Activity Data

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