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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing
BOSTON MARATHON 2026

Tomoki Koizumi

Bib: 905 β€’M β€’Age: N/A

NY

Boston Marathon logo
0:00
0:00
/ mi
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Overall
#0 / 29021
Top 6%
Gender (Male)
#0 / 16340
Top 10%
Age Group (M18-39)
#0 / 5723
Top 25%
Race Day Weather
51Β°/41Β°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
19:01
3.11 mi
Rank: #1687
Start β†’ 5K
19:01 | 6:08/mi
10K
38:20
6.21 mi
Rank: #2039 (-352)
5K β†’ 10K
19:19 | 6:14/mi
15K
57:37
9.32 mi
Rank: #2120 (-81)
10K β†’ 15K
19:17 | 6:13/mi
20K
1:17:00
12.43 mi
Rank: #2138 (-18)
15K β†’ 20K
19:23 | 6:15/mi
HALF
1:21:12
13.11 mi
Rank: #2136 (+2)
20K β†’ HALF
4:12 | 6:10/mi
25K
1:36:20
15.53 mi
Rank: #2107 (+29)
HALF β†’ 25K
15:08 | 6:15/mi
30K
1:55:58
18.64 mi
Rank: #1993 (+114)
25K β†’ 30K
19:38 | 6:20/mi
20M
2:04:31
20.00 mi
Rank: #1934 (+59)
30K β†’ 20M
8:33 | 6:18/mi
21M
2:11:01
21.00 mi
Rank: #1868 (+66)
20M β†’ 21M
6:30 | 6:30/mi
35K
2:15:32
21.75 mi
Rank: #1826 (+42)
21M β†’ 35K
4:31 | 6:03/mi
23M
2:23:24
23.00 mi
Rank: #1775 (+51)
35K β†’ 23M
7:52 | 6:18/mi
24M
2:29:39
24.00 mi
Rank: #1761 (+14)
23M β†’ 24M
6:15 | 6:15/mi
40K
2:35:03
24.85 mi
Rank: #1723 (+38)
24M β†’ 40K
5:24 | 6:19/mi
25.2M
2:37:23
25.20 mi
Rank: #1721 (+2)
40K β†’ 25.2M
2:20 | 6:46/mi
FINISH
2:43:37
26.22 mi
Rank: #1714 (+7)
25.2M β†’ FINISH
6:14 | 6:08/mi

Splits & Pacing

Detailed breakdown of your race performance at each timing point

Half Splits

1st HalfFaster
via HALF
Distance13.11 mi
Time1:21:12
Pace6:12 /mi
2nd Half
Distance13.11 mi
Time1:22:25
Pace6:18 /mi
πŸ“ŠPositive Split: 1.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:19:1619:016:0819:01
6:08
-
10K
6.21 mi10:38:3538:206:1119:19
6:14
+0:06
15K
9.32 mi10:57:5257:376:1119:17
6:13
-0:01
20K
12.43 mi11:17:151:17:006:1219:23
6:15
+0:02
HALF
13.11 mi11:21:271:21:126:124:12
6:10
-0:05
25K
15.53 mi11:36:351:36:206:1315:08
6:15
+0:05
30K
18.64 mi11:56:131:55:586:1419:38
6:20
+0:05
20M
20.00 mi12:04:462:04:316:148:33
6:18
-0:02
21M
21.00 mi12:11:162:11:016:156:30
6:30
+0:12
35K
21.75 mi12:15:472:15:326:144:31
6:03
-0:27
23M
23.00 mi12:23:392:23:246:157:52
6:18
+0:15
24M
24.00 mi12:29:542:29:396:156:15
6:15
-0:03
40K
24.85 mi12:35:182:35:036:155:24
6:19
+0:04
25.2M
25.20 mi12:37:382:37:236:152:20
6:46
+0:27
FINISH
26.22 mi12:43:522:43:376:156:14
6:08
-0:38

Checkpoint Splits Visualizations

Explore your race data through different visual perspectives. Scroll to discover each visualization.

πŸ“ˆPace 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

6:03 /mi

Average Pace

6:15 /mi

Slowest Pace

6:46 /mi

Loading chart...
Fastest
Middle
Slowest
Average

πŸ“ŠSegments

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

2:41:17

99% of race

Time at Steady Pace

2:20

1% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:14 /mi

Loading chart...
Faster pace (< avg)
Steady pace (β‰ˆ 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 mi10:19:1619:016:0819:01
6:08
#1687
10K
6.21 mi10:38:3538:206:1119:19
6:14
#2039
15K
9.32 mi10:57:5257:376:1119:17
6:13
#2120
20K
12.43 mi11:17:151:17:006:1219:23
6:15
#2138
HALF
13.11 mi11:21:271:21:126:124:12
6:10
#2136
25K
15.53 mi11:36:351:36:206:1315:08
6:15
#2107
30K
18.64 mi11:56:131:55:586:1419:38
6:20
#1993
20M
20.00 mi12:04:462:04:316:148:33
6:18
#1934
21M
21.00 mi12:11:162:11:016:156:30
6:30
#1868
35K
21.75 mi12:15:472:15:326:144:31
6:03
#1826
23M
23.00 mi12:23:392:23:246:157:52
6:18
#1775
24M
24.00 mi12:29:542:29:396:156:15
6:15
#1761
40K
24.85 mi12:35:182:35:036:155:24
6:19
#1723
25.2M
25.20 mi12:37:382:37:236:152:20
6:46
#1721
FINISH
26.22 mi12:43:522:43:376:156:14
6:08
#1714
Faster pace
Steady pace
Slower pace

Rankings

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

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi1687162116212302(Top 8%)2217(Top 14%)2217(Top 39%)
10K6.21 mi3.10 mi2039-3521967-3461967-3462335(Top 8%)2249(Top 14%)2249(Top 39%)
15K9.32 mi3.11 mi2120-812044-772044-772302(Top 8%)2217(Top 14%)2217(Top 39%)
20K12.43 mi3.11 mi2138-182061-172061-172219(Top 8%)2137(Top 13%)2137(Top 37%)
HALF13.11 mi0.68 mi2136+22060+12060+12204(Top 8%)2125(Top 13%)2125(Top 37%)
25K15.53 mi2.42 mi2107+292032+282032+282011(Top 7%)1937(Top 12%)1937(Top 34%)
30K18.64 mi3.11 mi1993+1141922+1101922+1101719(Top 6%)1653(Top 10%)1653(Top 29%)
20M20.00 mi1.36 mi1934+591863+591863+591515(Top 5%)1452(Top 9%)1452(Top 25%)
21M21.00 mi1.00 mi1868+661801+621801+621260(Top 4%)1212(Top 7%)1212(Top 21%)
35K21.75 mi0.75 mi1826+421758+431758+431340(Top 5%)1288(Top 8%)1288(Top 23%)
23M23.00 mi1.25 mi1775+511709+491709+491500(Top 5%)1434(Top 9%)1434(Top 25%)
24M24.00 mi1.00 mi1761+141695+141695+141955(Top 7%)1842(Top 11%)1842(Top 32%)
40K24.85 mi0.85 mi1723+381658+371658+371786(Top 6%)1679(Top 10%)1679(Top 29%)
25.2M25.20 mi0.35 mi1721+21657+11657+11698(Top 6%)1585(Top 10%)1585(Top 28%)
FINISH26.22 mi1.02 mi1714+71648+91648+92096(Top 7%)1930(Top 12%)1930(Top 34%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 8%
Γ—21
+97ft-345ft

Overall

2302

Males

2217

M18-39

2217

5K→10K

3.1 - 6.2 mi

Top 8%
Γ—5
+79ft-138ft

Overall

2335

Males

2249

M18-39

2249

10K→15K

6.2 - 9.3 mi

Top 8%
Γ—3
+67ft-78ft

Overall

2302

Males

2217

M18-39

2217

15K→20K

9.3 - 12.4 mi

Top 8%
Γ—5
+106ft-86ft

Overall

2219

Males

2137

M18-39

2137

20K→HALF

12.4 - 13.1 mi

Top 8%
Γ—2
+19ft-37ft

Overall

2204

Males

2125

M18-39

2125

HALF→25K

13.1 - 15.5 mi

Top 7%
Γ—4
+66ft-88ft

Overall

2011

Males

1937

M18-39

1937

25K→30K

15.5 - 18.6 mi

Top 6%
Γ—9
+181ft-148ft

Overall

1719

Males

1653

M18-39

1653

30K→20M

18.6 - 20.0 mi

Top 5%
Γ—5
+64ft-50ft

Overall

1515

Males

1452

M18-39

1452

20M→21M

20.0 - 21.0 mi

Top 4%
Γ—8
+106ft-24ft

Overall

1260

Males

1212

M18-39

1212

21M→35K

21.0 - 21.8 mi

Top 5%
Γ—7
+17ft-86ft

Overall

1340

Males

1288

M18-39

1288

35K→23M

21.8 - 23.0 mi

Top 5%
Γ—5
+23ft-63ft

Overall

1500

Males

1434

M18-39

1434

23M→24M

23.0 - 24.0 mi

Top 7%
Γ—6
+12ft-82ft

Overall

1955

Males

1842

M18-39

1842

24M→40K

24.0 - 24.9 mi

Top 6%
Γ—1
+6ft-20ft

Overall

1786

Males

1679

M18-39

1679

40K→25.2M

24.9 - 25.2 mi

Top 6%
Γ—1
+13ft-16ft

Overall

1698

Males

1585

M18-39

1585

25.2M→FINISH

25.2 - 26.2 mi

Top 7%
Γ—2
+22ft-21ft

Overall

2096

Males

1930

M18-39

1930

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
642
Passed By
505
Net Change
-27
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start β†’ 5K----#1687
5K β†’ 10K12200-352#1687#2039
10K β†’ 15K31112-81#2039#2120
15K β†’ 20K3755-18#2120#2138
20K β†’ HALF108+2#2138#2136
HALF β†’ 25K5223+29#2136#2107
25K β†’ 30K13622+114#2107#1993
30K β†’ 20M634+59#1993#1934
20M β†’ 21M748+66#1934#1868
21M β†’ 35K486+42#1868#1826
35K β†’ 23M576+51#1826#1775
23M β†’ 24M3117+14#1775#1761
24M β†’ 40K4810+38#1761#1723
40K β†’ 25.2M1311+2#1723#1721
25.2M β†’ FINISH3023+7#1721#1714
TOTALS642505-27
πŸ“Š

Passing Analysis Visualizations

Explore your passing analysis through 5 different visualizations. Scroll to discover each one.

Time:
Category:

πŸ“ˆPosition Graph

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🎨Heatmap Timeline

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πŸ”„Passing Circle

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🌊Position Flow

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πŸƒRace Lanes

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