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BOSTON MARATHON 2024

Tetsu Kozakura

Bib: 8752•M

IL

0:00
0:00
/ mi
Masters
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Overall
#0 / 25550
Top 16%
Gender (Male)
#0 / 14578
Top 25%
Masters (Masters Men)
#0 / 9729
Top 14%
Division (M40-44)
#0 / 2009
Top 35%
Race Day Weather
55°/45°F
scattered clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:44
Rank: #4613
Start → 5K
20:44 | 6:40/mi
10K· 6.21 mi
41:43
Rank: #4665 (-52)
5K → 10K
20:59 | 6:45/mi
15K· 9.32 mi
1:03:09
Rank: #4959 (-294)
10K → 15K
21:26 | 6:54/mi
20K· 12.43 mi
1:24:34
Rank: #4792 (+167)
15K → 20K
21:26 | 6:54/mi
Half· 13.11 mi
1:29:17
Rank: #4802 (-10)
20K → Half
4:42 | 6:54/mi
25K· 15.53 mi
1:46:00
Rank: #4527 (+275)
Half → 25K
16:43 | 6:54/mi
30K· 18.64 mi
2:09:09
Rank: #4592 (-65)
25K → 30K
23:09 | 7:27/mi
20M
2:19:29
Rank: #4541 (+51)
30K → 20M
10:20 | 7:36/mi
21M
2:27:32
Rank: #4456 (+85)
20M → 21M
8:03 | 8:03/mi
35K· 21.75 mi
2:32:49
Rank: #4345 (+111)
21M → 35K
5:17 | 7:04/mi
23M
2:42:14
Rank: #4194 (+151)
35K → 23M
9:25 | 7:31/mi
24M
2:49:46
Rank: #4118 (+76)
23M → 24M
7:32 | 7:32/mi
40K· 24.85 mi
2:56:26
Rank: #4089 (+29)
24M → 40K
6:40 | 7:48/mi
25.2M
2:59:38
Rank: #4108 (-19)
40K → 25.2M
3:12 | 9:17/mi
Finish· 26.22 mi
3:07:12
Rank: #4099 (+9)
25.2M → Finish
7:34 | 7:26/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:29:17
Pace6:49 /mi
2nd Half
Distance13.11 mi
Time1:37:55
Pace7:28 /mi
📊Positive Split: 9.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:46:0320:446:4020:44
6:40
-
10K
6.21 mi11:07:0241:436:4320:59
6:45
+0:05
15K
9.32 mi11:28:281:03:096:4621:26
6:54
+0:09
20K
12.43 mi11:49:531:24:346:4821:26
6:54
0:00
Half
13.11 mi11:54:361:29:176:494:42
6:54
0:00
25K
15.53 mi12:11:191:46:006:4916:43
6:54
0:00
30K
18.64 mi12:34:282:09:096:5623:09
7:27
+0:33
20M
20.00 mi12:44:482:19:296:5810:20
7:36
+0:09
21M
21.00 mi12:52:512:27:327:028:03
8:03
+0:27
35K
21.75 mi12:58:082:32:497:025:17
7:04
-0:59
23M
23.00 mi13:07:332:42:147:039:25
7:31
+0:27
24M
24.00 mi13:15:052:49:467:047:32
7:32
+0:01
40K
24.85 mi13:21:452:56:267:066:40
7:48
+0:16
25.2M
25.20 mi13:24:572:59:387:083:12
9:17
+1:29
Finish
26.22 mi13:32:313:07:127:097:34
7:26
-1:51

Checkpoints & Pacing

📈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

6:40 /mi

Average Pace

7:09 /mi

Slowest Pace

9:17 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:51:17

59% of race

Time at Steady Pace

58:00

31% of race

Time at Slower Pace

17:55

10% of race

Average Pace: 7:08 /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

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi10:46:0320:446:4020:44
6:40
#4613
10K
6.21 mi11:07:0241:436:4320:59
6:45
#4665
15K
9.32 mi11:28:281:03:096:4621:26
6:54
#4959
20K
12.43 mi11:49:531:24:346:4821:26
6:54
#4792
Half
13.11 mi11:54:361:29:176:494:42
6:54
#4802
25K
15.53 mi12:11:191:46:006:4916:43
6:54
#4527
30K
18.64 mi12:34:282:09:096:5623:09
7:27
#4592
20M
20.00 mi12:44:482:19:296:5810:20
7:36
#4541
21M
21.00 mi12:52:512:27:327:028:03
8:03
#4456
35K
21.75 mi12:58:082:32:497:025:17
7:04
#4345
23M
23.00 mi13:07:332:42:147:039:25
7:31
#4194
24M
24.00 mi13:15:052:49:467:047:32
7:32
#4118
40K
24.85 mi13:21:452:56:267:066:40
7:48
#4089
25.2M
25.20 mi13:24:572:59:387:083:12
9:17
#4108
Finish
26.22 mi13:32:313:07:127:097:34
7:26
#4099
Faster pace
Steady pace
Slower pace
Est.Checkpoint not recorded (estimated)
~Segment time uses estimated prior

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi4613431443145529(Top 22%)5023(Top 34%)5023(Top 250%)
10K6.21 mi3.10 mi4665-524351-374351-374771(Top 19%)4432(Top 30%)4432(Top 221%)
15K9.32 mi3.11 mi4959-2944592-2414592-2415529(Top 22%)5023(Top 34%)5023(Top 250%)
20K12.43 mi3.11 mi4792+1674443+1494443+1494605(Top 18%)4241(Top 29%)4241(Top 211%)
Half13.11 mi0.68 mi4802-104453-104453-105192(Top 20%)4707(Top 32%)4707(Top 234%)
25K15.53 mi2.42 mi4527+2754209+2444209+2443774(Top 15%)3503(Top 24%)3503(Top 174%)
30K18.64 mi3.11 mi4592-654232-234232-234849(Top 19%)4241(Top 29%)4241(Top 211%)
20M20.00 mi1.36 mi4541+514178+544178+544750(Top 19%)4084(Top 28%)4084(Top 203%)
21M21.00 mi1.00 mi4456+854089+894089+894346(Top 17%)3670(Top 25%)3670(Top 183%)
35K21.75 mi0.75 mi4345+1113985+1043985+1043300(Top 13%)2935(Top 20%)2935(Top 146%)
23M23.00 mi1.25 mi4194+1513835+1503835+1503702(Top 14%)3175(Top 22%)3175(Top 158%)
24M24.00 mi1.00 mi4118+763750+853750+854254(Top 17%)3454(Top 24%)3454(Top 172%)
40K24.85 mi0.85 mi4089+293709+413709+414733(Top 19%)3631(Top 25%)3631(Top 181%)
25.2M25.20 mi0.35 mi4108-193715-63715-67739(Top 30%)5159(Top 35%)5159(Top 257%)
Finish26.22 mi1.02 mi4099+93689+263689+265180(Top 20%)3893(Top 27%)3893(Top 194%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 22%
×21stories
+97ft-345ft

Overall

5529

Males

5023

M40-44

5023

5K→10K

3.1 - 6.2 mi

Top 19%
×5stories
+79ft-138ft

Overall

4771

Males

4432

M40-44

4432

10K→15K

6.2 - 9.3 mi

Top 22%
×3stories
+67ft-78ft

Overall

5529

Males

5023

M40-44

5023

15K→20K

9.3 - 12.4 mi

Top 18%
×5stories
+106ft-86ft

Overall

4605

Males

4241

M40-44

4241

20K→Half

12.4 - 13.1 mi

Top 20%
×2stories
+19ft-37ft

Overall

5192

Males

4707

M40-44

4707

Half→25K

13.1 - 15.5 mi

Top 15%
×4stories
+66ft-88ft

Overall

3774

Males

3503

M40-44

3503

25K→30K

15.5 - 18.6 mi

Top 19%
×9stories
+181ft-148ft

Overall

4849

Males

4241

M40-44

4241

30K→20M

18.6 - 20.0 mi

Top 19%
×5stories
+64ft-50ft

Overall

4750

Males

4084

M40-44

4084

20M→21M

20.0 - 21.0 mi

Top 17%
×8stories
+106ft-24ft

Overall

4346

Males

3670

M40-44

3670

21M→35K

21.0 - 21.8 mi

Top 13%
×7stories
+17ft-86ft

Overall

3300

Males

2935

M40-44

2935

35K→23M

21.8 - 23.0 mi

Top 14%
×5stories
+23ft-63ft

Overall

3702

Males

3175

M40-44

3175

23M→24M

23.0 - 24.0 mi

Top 17%
×6stories
+12ft-82ft

Overall

4254

Males

3454

M40-44

3454

24M→40K

24.0 - 24.9 mi

Top 19%
×1story
+6ft-20ft

Overall

4733

Males

3631

M40-44

3631

40K→25.2M

24.9 - 25.2 mi

Top 30%
×1story
+13ft-16ft

Overall

7739

Males

5159

M40-44

5159

25.2M→Finish

25.2 - 26.2 mi

Top 20%
×2stories
+22ft-21ft

Overall

5180

Males

3893

M40-44

3893

Passing Analysis

Category:
Athletes Passed
1750
Passed By
1236
Net Change
+514
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#4613
5K → 10K158210-52#4613#4665
10K → 15K63357-294#4665#4959
15K → 20K24073+167#4959#4792
20K → Half2737-10#4792#4802
Half → 25K30631+275#4802#4527
25K → 30K174239-65#4527#4592
30K → 20M11564+51#4592#4541
20M → 21M12540+85#4541#4456
21M → 35K1187+111#4456#4345
35K → 23M17524+151#4345#4194
23M → 24M10226+76#4194#4118
24M → 40K6738+29#4118#4089
40K → 25.2M2140-19#4089#4108
25.2M → Finish5950+9#4108#4099
TOTALS17501236+514
📊

Passing Visuals

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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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing