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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing
BOSTON MARATHON 2026

Marit Kosters

Bib: 20929 •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
24:52
3.11 mi
Rank: #16996
Start → 5K
24:52 | 8:01/mi
10K
49:47
6.21 mi
Rank: #17179 (-183)
5K → 10K
24:55 | 8:02/mi
15K
1:14:54
9.32 mi
Rank: #17329 (-150)
10K → 15K
25:07 | 8:06/mi
20K
1:40:47
12.43 mi
Rank: #17586 (-257)
15K → 20K
25:53 | 8:20/mi
HALF
1:46:20
13.11 mi
Rank: #17599 (-13)
20K → HALF
5:33 | 8:09/mi
25K
2:06:48
15.53 mi
Rank: #17688 (-89)
HALF → 25K
20:28 | 8:27/mi
30K
2:34:00
18.64 mi
Rank: #17780 (-92)
25K → 30K
27:12 | 8:46/mi
20M
2:45:55
20.00 mi
Rank: #17773 (+7)
30K → 20M
11:55 | 8:47/mi
21M
2:55:12
21.00 mi
Rank: #17737 (+36)
20M → 21M
9:17 | 9:17/mi
35K
3:01:32
21.75 mi
Rank: #17703 (+34)
21M → 35K
6:20 | 8:28/mi
23M
3:12:39
23.00 mi
Rank: #17699 (+4)
35K → 23M
11:07 | 8:53/mi
24M
3:20:58
24.00 mi
Rank: #17591 (+108)
23M → 24M
8:19 | 8:19/mi
40K
3:28:15
24.85 mi
Rank: #17498 (+93)
24M → 40K
7:17 | 8:32/mi
25.2M
3:31:30
25.20 mi
Rank: #17481 (+17)
40K → 25.2M
3:15 | 9:26/mi
FINISH
3:39:54
26.22 mi
Rank: #17449 (+32)
25.2M → FINISH
8:24 | 8:15/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
Time1:46:20
Pace8:07 /mi
2nd Half
Distance13.11 mi
Time1:53:34
Pace8:40 /mi
📊Positive Split: 6.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:11:3624:528:0124:52
8:01
-
10K
6.21 mi11:36:3149:478:0124:55
8:02
+0:01
15K
9.32 mi12:01:381:14:548:0325:07
8:06
+0:04
20K
12.43 mi12:27:311:40:478:0725:53
8:20
+0:14
HALF
13.11 mi12:33:041:46:208:075:33
8:09
-0:11
25K
15.53 mi12:53:322:06:488:1020:28
8:27
+0:18
30K
18.64 mi13:20:442:34:008:1627:12
8:46
+0:19
20M
20.00 mi13:32:392:45:558:1811:55
8:47
+0:01
21M
21.00 mi13:41:562:55:128:219:17
9:17
+0:30
35K
21.75 mi13:48:163:01:328:216:20
8:28
-0:49
23M
23.00 mi13:59:233:12:398:2311:07
8:53
+0:25
24M
24.00 mi14:07:423:20:588:238:19
8:19
-0:34
40K
24.85 mi14:14:593:28:158:237:17
8:32
+0:13
25.2M
25.20 mi14:18:143:31:308:243:15
9:26
+0:54
FINISH
26.22 mi14:26:383:39:548:248:24
8:15
-1:11

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

8:24 /mi

Slowest Pace

9:26 /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

3:16:15

89% of race

Time at Steady Pace

23:39

11% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:23 /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 mi11:11:3624:528:0124:52
8:01
#16996
10K
6.21 mi11:36:3149:478:0124:55
8:02
#17179
15K
9.32 mi12:01:381:14:548:0325:07
8:06
#17329
20K
12.43 mi12:27:311:40:478:0725:53
8:20
#17586
HALF
13.11 mi12:33:041:46:208:075:33
8:09
#17599
25K
15.53 mi12:53:322:06:488:1020:28
8:27
#17688
30K
18.64 mi13:20:442:34:008:1627:12
8:46
#17780
20M
20.00 mi13:32:392:45:558:1811:55
8:47
#17773
21M
21.00 mi13:41:562:55:128:219:17
9:17
#17737
35K
21.75 mi13:48:163:01:328:216:20
8:28
#17703
23M
23.00 mi13:59:233:12:398:2311:07
8:53
#17699
24M
24.00 mi14:07:423:20:588:238:19
8:19
#17591
40K
24.85 mi14:14:593:28:158:237:17
8:32
#17498
25.2M
25.20 mi14:18:143:31:308:243:15
9:26
#17481
FINISH
26.22 mi14:26:383:39:548:248:24
8:15
#17449
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 mi169965926592617611(Top 61%)6262(Top 50%)6262(Top 351%)
10K6.21 mi3.10 mi17179-1836032-1066032-10617403(Top 60%)6147(Top 49%)6147(Top 344%)
15K9.32 mi3.11 mi17329-1506115-836115-8317611(Top 61%)6262(Top 50%)6262(Top 351%)
20K12.43 mi3.11 mi17586-2576266-1516266-15118299(Top 63%)6688(Top 53%)6688(Top 374%)
HALF13.11 mi0.68 mi17599-136268-26268-218094(Top 62%)6522(Top 52%)6522(Top 365%)
25K15.53 mi2.42 mi17688-896326-586326-5818216(Top 63%)6693(Top 53%)6693(Top 375%)
30K18.64 mi3.11 mi17780-926409-836409-8318345(Top 63%)6861(Top 55%)6861(Top 384%)
20M20.00 mi1.36 mi17773+76420-116420-1117825(Top 61%)6652(Top 53%)6652(Top 372%)
21M21.00 mi1.00 mi17737+366419+16419+117559(Top 61%)6548(Top 52%)6548(Top 367%)
35K21.75 mi0.75 mi17703+346417+26417+217422(Top 60%)6578(Top 52%)6578(Top 368%)
23M23.00 mi1.25 mi17699+46450-336450-3317919(Top 62%)6916(Top 55%)6916(Top 387%)
24M24.00 mi1.00 mi17591+1086399+516399+5115834(Top 55%)5811(Top 46%)5811(Top 325%)
40K24.85 mi0.85 mi17498+936365+346365+3415842(Top 55%)5884(Top 47%)5884(Top 329%)
25.2M25.20 mi0.35 mi17481+176364+16364+117000(Top 59%)6506(Top 52%)6506(Top 364%)
FINISH26.22 mi1.02 mi17449+326367-36367-316699(Top 58%)6345(Top 50%)6345(Top 355%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 61%
×21
+97ft-345ft

Overall

17611

Females

6262

F45-49

6262

5K→10K

3.1 - 6.2 mi

Top 60%
×5
+79ft-138ft

Overall

17403

Females

6147

F45-49

6147

10K→15K

6.2 - 9.3 mi

Top 61%
×3
+67ft-78ft

Overall

17611

Females

6262

F45-49

6262

15K→20K

9.3 - 12.4 mi

Top 63%
×5
+106ft-86ft

Overall

18299

Females

6688

F45-49

6688

20K→HALF

12.4 - 13.1 mi

Top 62%
×2
+19ft-37ft

Overall

18094

Females

6522

F45-49

6522

HALF→25K

13.1 - 15.5 mi

Top 63%
×4
+66ft-88ft

Overall

18216

Females

6693

F45-49

6693

25K→30K

15.5 - 18.6 mi

Top 63%
×9
+181ft-148ft

Overall

18345

Females

6861

F45-49

6861

30K→20M

18.6 - 20.0 mi

Top 61%
×5
+64ft-50ft

Overall

17825

Females

6652

F45-49

6652

20M→21M

20.0 - 21.0 mi

Top 61%
×8
+106ft-24ft

Overall

17559

Females

6548

F45-49

6548

21M→35K

21.0 - 21.8 mi

Top 60%
×7
+17ft-86ft

Overall

17422

Females

6578

F45-49

6578

35K→23M

21.8 - 23.0 mi

Top 62%
×5
+23ft-63ft

Overall

17919

Females

6916

F45-49

6916

23M→24M

23.0 - 24.0 mi

Top 55%
×6
+12ft-82ft

Overall

15834

Females

5811

F45-49

5811

24M→40K

24.0 - 24.9 mi

Top 55%
×1
+6ft-20ft

Overall

15842

Females

5884

F45-49

5884

40K→25.2M

24.9 - 25.2 mi

Top 59%
×1
+13ft-16ft

Overall

17000

Females

6506

F45-49

6506

25.2M→FINISH

25.2 - 26.2 mi

Top 58%
×2
+22ft-21ft

Overall

16699

Females

6345

F45-49

6345

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
1422
Passed By
1414
Net Change
-453
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#16996
5K → 10K192200-183#16996#17179
10K → 15K129200-150#17179#17329
15K → 20K94200-257#17329#17586
20K → HALF3245-13#17586#17599
HALF → 25K94183-89#17599#17688
25K → 30K164200-92#17688#17780
30K → 20M9184+7#17780#17773
20M → 21M10266+36#17773#17737
21M → 35K7339+34#17737#17703
35K → 23M9490+4#17703#17699
23M → 24M12416+108#17699#17591
24M → 40K11825+93#17591#17498
40K → 25.2M3922+17#17498#17481
25.2M → FINISH7644+32#17481#17449
TOTALS14221414-453
📊

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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