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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing
BOSTON MARATHON 2026

Yasuhiro Karasu

Bib: 6045 •M •Age: N/A

Boston Marathon logo
0:00
0:00
/ mi
Masters
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Overall
#0 / 29021
Gender (Male)
#0 / 16340
Masters (Masters Men)
#0 / 10617
Age Group (M50-54)
#0 / 1868
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
20:49
3.11 mi
Rank: #5912
Start → 5K
20:49 | 6:43/mi
10K
40:59
6.21 mi
Rank: #4955 (+957)
5K → 10K
20:10 | 6:30/mi
15K
1:04:51
9.32 mi
Rank: #8271 (-3316)
10K → 15K
23:52 | 7:41/mi
20K
1:29:14
12.43 mi
Rank: #9713 (-1442)
15K → 20K
24:23 | 7:51/mi
HALF
1:34:14
13.11 mi
Rank: #9811 (-98)
20K → HALF
5:00 | 7:21/mi
25K
1:56:20
15.53 mi
Rank: #12302 (-2491)
HALF → 25K
22:06 | 9:07/mi
30K
2:25:39
18.64 mi
Rank: #14458 (-2156)
25K → 30K
29:19 | 9:27/mi
20M
2:37:45
20.00 mi
Rank: #14835 (-377)
30K → 20M
12:06 | 8:55/mi
21M
2:47:41
21.00 mi
Rank: #15245 (-410)
20M → 21M
9:56 | 9:56/mi
35K
2:55:10
21.75 mi
Rank: #15731 (-486)
21M → 35K
7:29 | 10:01/mi
23M
3:09:03
23.00 mi
Rank: #16686 (-955)
35K → 23M
13:53 | 11:06/mi
24M
3:18:42
24.00 mi
Rank: #16979 (-293)
23M → 24M
9:39 | 9:39/mi
40K
3:26:26
24.85 mi
Rank: #17035 (-56)
24M → 40K
7:44 | 9:03/mi
25.2M
3:29:29
25.20 mi
Rank: #16984 (+51)
40K → 25.2M
3:03 | 8:51/mi
FINISH
3:38:09
26.22 mi
Rank: #17018 (-34)
25.2M → FINISH
8:40 | 8:31/mi

Splits & Pacing

Detailed breakdown of your race performance at each timing point

Half Splits

1st HalfFaster
via HALF
Distance13.11 mi
Time1:34:14
Pace7:12 /mi
2nd Half
Distance13.11 mi
Time2:03:55
Pace9:28 /mi
📊Positive Split: 31.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:24:1520:496:4320:49
6:43
-
10K
6.21 mi10:44:2540:596:3620:10
6:30
-0:13
15K
9.32 mi11:08:171:04:516:5823:52
7:41
+1:11
20K
12.43 mi11:32:401:29:147:1124:23
7:51
+0:10
HALF
13.11 mi11:37:401:34:147:125:00
7:21
-0:30
25K
15.53 mi11:59:461:56:207:3022:06
9:07
+1:46
30K
18.64 mi12:29:052:25:397:4929:19
9:27
+0:20
20M
20.00 mi12:41:112:37:457:5412:06
8:55
-0:32
21M
21.00 mi12:51:072:47:418:009:56
9:56
+1:01
35K
21.75 mi12:58:362:55:108:047:29
10:01
+0:05
23M
23.00 mi13:12:293:09:038:1413:53
11:06
+1:05
24M
24.00 mi13:22:083:18:428:179:39
9:39
-1:27
40K
24.85 mi13:29:523:26:268:197:44
9:03
-0:36
25.2M
25.20 mi13:32:553:29:298:193:03
8:51
-0:12
FINISH
26.22 mi13:41:353:38:098:208:40
8:31
-0:20

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

6:30 /mi

Average Pace

8:20 /mi

Slowest Pace

11:06 /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

1:34:14

43% of race

Time at Steady Pace

1:22:58

38% of race

Time at Slower Pace

40:57

19% of race

Average Pace: 8:19 /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 mi10:24:1520:496:4320:49
6:43
#5912
10K
6.21 mi10:44:2540:596:3620:10
6:30
#4955
15K
9.32 mi11:08:171:04:516:5823:52
7:41
#8271
20K
12.43 mi11:32:401:29:147:1124:23
7:51
#9713
HALF
13.11 mi11:37:401:34:147:125:00
7:21
#9811
25K
15.53 mi11:59:461:56:207:3022:06
9:07
#12302
30K
18.64 mi12:29:052:25:397:4929:19
9:27
#14458
20M
20.00 mi12:41:112:37:457:5412:06
8:55
#14835
21M
21.00 mi12:51:072:47:418:009:56
9:56
#15245
35K
21.75 mi12:58:362:55:108:047:29
10:01
#15731
23M
23.00 mi13:12:293:09:038:1413:53
11:06
#16686
24M
24.00 mi13:22:083:18:428:179:39
9:39
#16979
40K
24.85 mi13:29:523:26:268:197:44
9:03
#17035
25.2M
25.20 mi13:32:553:29:298:193:03
8:51
#16984
FINISH
26.22 mi13:41:353:38:098:208:40
8:31
#17018
Faster pace
Steady pace
Slower pace

Rankings

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

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi59125413541314371(Top 50%)9948(Top 61%)9948(Top 533%)
10K6.21 mi3.10 mi4955+9574630+7834630+7834167(Top 14%)3951(Top 24%)3951(Top 212%)
15K9.32 mi3.11 mi8271-33167049-24197049-241914371(Top 50%)9948(Top 61%)9948(Top 533%)
20K12.43 mi3.11 mi9713-14427880-8317880-83114894(Top 51%)10103(Top 62%)10103(Top 541%)
HALF13.11 mi0.68 mi9811-987931-517931-5111502(Top 40%)8733(Top 53%)8733(Top 468%)
25K15.53 mi2.42 mi12302-24919054-11239054-112321653(Top 75%)13062(Top 80%)13062(Top 699%)
30K18.64 mi3.11 mi14458-21569925-8719925-87121406(Top 74%)12846(Top 79%)12846(Top 688%)
20M20.00 mi1.36 mi14835-37710046-12110046-12118480(Top 64%)11386(Top 70%)11386(Top 610%)
21M21.00 mi1.00 mi15245-41010176-13010176-13020180(Top 70%)12151(Top 74%)12151(Top 650%)
35K21.75 mi0.75 mi15731-48610376-20010376-20023145(Top 80%)13532(Top 83%)13532(Top 724%)
23M23.00 mi1.25 mi16686-95510760-38410760-38424675(Top 85%)14181(Top 87%)14181(Top 759%)
24M24.00 mi1.00 mi16979-29310860-10010860-10021799(Top 75%)12775(Top 78%)12775(Top 684%)
40K24.85 mi0.85 mi17035-5610863-310863-318590(Top 64%)11162(Top 68%)11162(Top 598%)
25.2M25.20 mi0.35 mi16984+5110834+2910834+2913749(Top 47%)8961(Top 55%)8961(Top 480%)
FINISH26.22 mi1.02 mi17018-3410828+610828+618172(Top 63%)10967(Top 67%)10967(Top 587%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 50%
×21
+97ft-345ft

Overall

14371

Males

9948

M50-54

9948

5K→10K

3.1 - 6.2 mi

Top 14%
×5
+79ft-138ft

Overall

4167

Males

3951

M50-54

3951

10K→15K

6.2 - 9.3 mi

Top 50%
×3
+67ft-78ft

Overall

14371

Males

9948

M50-54

9948

15K→20K

9.3 - 12.4 mi

Top 51%
×5
+106ft-86ft

Overall

14894

Males

10103

M50-54

10103

20K→HALF

12.4 - 13.1 mi

Top 40%
×2
+19ft-37ft

Overall

11502

Males

8733

M50-54

8733

HALF→25K

13.1 - 15.5 mi

Top 75%
×4
+66ft-88ft

Overall

21653

Males

13062

M50-54

13062

25K→30K

15.5 - 18.6 mi

Top 74%
×9
+181ft-148ft

Overall

21406

Males

12846

M50-54

12846

30K→20M

18.6 - 20.0 mi

Top 64%
×5
+64ft-50ft

Overall

18480

Males

11386

M50-54

11386

20M→21M

20.0 - 21.0 mi

Top 70%
×8
+106ft-24ft

Overall

20180

Males

12151

M50-54

12151

21M→35K

21.0 - 21.8 mi

Top 80%
×7
+17ft-86ft

Overall

23145

Males

13532

M50-54

13532

35K→23M

21.8 - 23.0 mi

Top 85%
×5
+23ft-63ft

Overall

24675

Males

14181

M50-54

14181

23M→24M

23.0 - 24.0 mi

Top 75%
×6
+12ft-82ft

Overall

21799

Males

12775

M50-54

12775

24M→40K

24.0 - 24.9 mi

Top 64%
×1
+6ft-20ft

Overall

18590

Males

11162

M50-54

11162

40K→25.2M

24.9 - 25.2 mi

Top 47%
×1
+13ft-16ft

Overall

13749

Males

8961

M50-54

8961

25.2M→FINISH

25.2 - 26.2 mi

Top 63%
×2
+22ft-21ft

Overall

18172

Males

10967

M50-54

10967

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
1271*
Passed By
2104
Net Change
-11106
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#5912
5K → 10K968*11+957#5912#4955
10K → 15K1200-3316#4955#8271
15K → 20K12200-1442#8271#9713
20K → HALF6104-98#9713#9811
HALF → 25K5200-2491#9811#12302
25K → 30K15200-2156#12302#14458
30K → 20M29200-377#14458#14835
20M → 21M37200-410#14835#15245
21M → 35K10200-486#15245#15731
35K → 23M12200-955#15731#16686
23M → 24M26200-293#16686#16979
24M → 40K44100-56#16979#17035
40K → 25.2M565+51#17035#16984
25.2M → FINISH5084-34#16984#17018
TOTALS1271*2104-11106

* 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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