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BOSTON MARATHON 2025

Eiichi Kozono

Bib: 19679•M

CA

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M55-59)
#0 / 1648
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
26:29
Rank: #20014
Start → 5K
26:29 | 8:31/mi
10K· 6.21 mi
52:48
Rank: #19822 (+192)
5K → 10K
26:19 | 8:28/mi
15K· 9.32 mi
1:18:54
Rank: #19451 (+371)
10K → 15K
26:06 | 8:24/mi
20K· 12.43 mi
1:45:26
Rank: #19167 (+284)
15K → 20K
26:32 | 8:32/mi
Half· 13.11 mi
1:51:12
Rank: #19140 (+27)
20K → Half
5:46 | 8:27/mi
25K· 15.53 mi
2:12:10
Rank: #18946 (+194)
Half → 25K
20:58 | 8:39/mi
30K· 18.64 mi
2:40:22
Rank: #18773 (+173)
25K → 30K
28:12 | 9:05/mi
20M
2:52:44
Rank: #18640 (+133)
30K → 20M
12:22 | 9:06/mi
21M
3:02:20
Rank: #18503 (+137)
20M → 21M
9:36 | 9:36/mi
35K· 21.75 mi
3:08:55
Rank: #18458 (+45)
21M → 35K
6:35 | 8:48/mi
23M
3:20:15
Rank: #18320 (+138)
35K → 23M
11:20 | 9:03/mi
24M
3:29:15
Rank: #18255 (+65)
23M → 24M
9:00 | 9:00/mi
40K· 24.85 mi
3:36:59
Rank: #18185 (+70)
24M → 40K
7:44 | 9:03/mi
25.2M
3:40:28
Rank: #18187 (-2)
40K → 25.2M
3:29 | 10:06/mi
Finish· 26.22 mi
3:49:26
Rank: #18190 (-3)
25.2M → Finish
8:58 | 8:48/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:51:12
Pace8:29 /mi
2nd Half
Distance13.11 mi
Time1:58:14
Pace9:01 /mi
📊Positive Split: 6.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:18:5226:298:3126:29
8:31
-
10K
6.21 mi11:45:1152:488:3026:19
8:28
-0:03
15K
9.32 mi12:11:171:18:548:2826:06
8:24
-0:04
20K
12.43 mi12:37:491:45:268:2926:32
8:32
+0:08
Half
13.11 mi12:43:351:51:128:295:46
8:27
-0:05
25K
15.53 mi13:04:332:12:108:3020:58
8:39
+0:12
30K
18.64 mi13:32:452:40:228:3628:12
9:05
+0:26
20M
20.00 mi13:45:072:52:448:3812:22
9:06
+0:01
21M
21.00 mi13:54:433:02:208:419:36
9:36
+0:30
35K
21.75 mi14:01:183:08:558:416:35
8:48
-0:48
23M
23.00 mi14:12:383:20:158:4211:20
9:03
+0:15
24M
24.00 mi14:21:383:29:158:439:00
9:00
-0:03
40K
24.85 mi14:29:223:36:598:447:44
9:03
+0:03
25.2M
25.20 mi14:32:513:40:288:453:29
10:06
+1:03
Finish
26.22 mi14:41:493:49:268:458:58
8:48
-1:18

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

8:24 /mi

Average Pace

8:45 /mi

Slowest Pace

10:06 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:51:12

48% of race

Time at Steady Pace

45:31

20% of race

Time at Slower Pace

1:12:43

32% of race

Average Pace: 8:45 /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 mi11:18:5226:298:3126:29
8:31
#20014
10K
6.21 mi11:45:1152:488:3026:19
8:28
#19822
15K
9.32 mi12:11:171:18:548:2826:06
8:24
#19451
20K
12.43 mi12:37:491:45:268:2926:32
8:32
#19167
Half
13.11 mi12:43:351:51:128:295:46
8:27
#19140
25K
15.53 mi13:04:332:12:108:3020:58
8:39
#18946
30K
18.64 mi13:32:452:40:228:3628:12
9:05
#18773
20M
20.00 mi13:45:072:52:448:3812:22
9:06
#18640
21M
21.00 mi13:54:433:02:208:419:36
9:36
#18503
35K
21.75 mi14:01:183:08:558:416:35
8:48
#18458
23M
23.00 mi14:12:383:20:158:4211:20
9:03
#18320
24M
24.00 mi14:21:383:29:158:439:00
9:00
#18255
40K
24.85 mi14:29:223:36:598:447:44
9:03
#18185
25.2M
25.20 mi14:32:513:40:288:453:29
10:06
#18187
Finish
26.22 mi14:41:493:49:268:458:58
8:48
#18190
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM55-59Seg. OverallSeg. MalesSeg. M55-59
5K3.11 mi3.11 mi20014124461244618707(Top 66%)11927(Top 74%)11927(Top 724%)
10K6.21 mi3.10 mi19822+19212394+5212394+5219620(Top 69%)12314(Top 76%)12314(Top 747%)
15K9.32 mi3.11 mi19451+37112239+15512239+15518707(Top 66%)11927(Top 74%)11927(Top 724%)
20K12.43 mi3.11 mi19167+28412111+12812111+12818494(Top 65%)11818(Top 73%)11818(Top 717%)
Half13.11 mi0.68 mi19140+2712099+1212099+1218847(Top 66%)11972(Top 74%)11972(Top 726%)
25K15.53 mi2.42 mi18946+19412005+9412005+9418077(Top 64%)11555(Top 72%)11555(Top 701%)
30K18.64 mi3.11 mi18773+17311907+9811907+9818065(Top 64%)11409(Top 71%)11409(Top 692%)
20M20.00 mi1.36 mi18640+13311820+8711820+8717305(Top 61%)10950(Top 68%)10950(Top 664%)
21M21.00 mi1.00 mi18503+13711727+9311727+9316536(Top 58%)10495(Top 65%)10495(Top 637%)
35K21.75 mi0.75 mi18458+4511694+3311694+3317233(Top 61%)10711(Top 67%)10711(Top 650%)
23M23.00 mi1.25 mi18320+13811604+9011604+9016540(Top 58%)10308(Top 64%)10308(Top 625%)
24M24.00 mi1.00 mi18255+6511547+5711547+5717354(Top 61%)10631(Top 66%)10631(Top 645%)
40K24.85 mi0.85 mi18185+7011486+6111486+6116560(Top 58%)10181(Top 63%)10181(Top 618%)
25.2M25.20 mi0.35 mi18187-211476+1011476+1017432(Top 61%)10572(Top 66%)10572(Top 642%)
Finish26.22 mi1.02 mi18190-311466+1011466+1018018(Top 63%)10881(Top 68%)10881(Top 660%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 66%
×21stories
+97ft-345ft

Overall

18707

Males

11927

M55-59

11927

5K→10K

3.1 - 6.2 mi

Top 69%
×5stories
+79ft-138ft

Overall

19620

Males

12314

M55-59

12314

10K→15K

6.2 - 9.3 mi

Top 66%
×3stories
+67ft-78ft

Overall

18707

Males

11927

M55-59

11927

15K→20K

9.3 - 12.4 mi

Top 65%
×5stories
+106ft-86ft

Overall

18494

Males

11818

M55-59

11818

20K→Half

12.4 - 13.1 mi

Top 66%
×2stories
+19ft-37ft

Overall

18847

Males

11972

M55-59

11972

Half→25K

13.1 - 15.5 mi

Top 64%
×4stories
+66ft-88ft

Overall

18077

Males

11555

M55-59

11555

25K→30K

15.5 - 18.6 mi

Top 64%
×9stories
+181ft-148ft

Overall

18065

Males

11409

M55-59

11409

30K→20M

18.6 - 20.0 mi

Top 61%
×5stories
+64ft-50ft

Overall

17305

Males

10950

M55-59

10950

20M→21M

20.0 - 21.0 mi

Top 58%
×8stories
+106ft-24ft

Overall

16536

Males

10495

M55-59

10495

21M→35K

21.0 - 21.8 mi

Top 61%
×7stories
+17ft-86ft

Overall

17233

Males

10711

M55-59

10711

35K→23M

21.8 - 23.0 mi

Top 58%
×5stories
+23ft-63ft

Overall

16540

Males

10308

M55-59

10308

23M→24M

23.0 - 24.0 mi

Top 61%
×6stories
+12ft-82ft

Overall

17354

Males

10631

M55-59

10631

24M→40K

24.0 - 24.9 mi

Top 58%
×1story
+6ft-20ft

Overall

16560

Males

10181

M55-59

10181

40K→25.2M

24.9 - 25.2 mi

Top 61%
×1story
+13ft-16ft

Overall

17432

Males

10572

M55-59

10572

25.2M→Finish

25.2 - 26.2 mi

Top 63%
×2stories
+22ft-21ft

Overall

18018

Males

10881

M55-59

10881

Passing Analysis

Category:
Athletes Passed
2671
Passed By
847
Net Change
+1824
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#20014
5K → 10K393201+192#20014#19822
10K → 15K42352+371#19822#19451
15K → 20K34258+284#19451#19167
20K → Half4922+27#19167#19140
Half → 25K25965+194#19140#18946
25K → 30K322149+173#18946#18773
30K → 20M16936+133#18773#18640
20M → 21M17437+137#18640#18503
21M → 35K7833+45#18503#18458
35K → 23M17133+138#18458#18320
23M → 24M10540+65#18320#18255
24M → 40K9424+70#18255#18185
40K → 25.2M2628-2#18185#18187
25.2M → Finish6669-3#18187#18190
TOTALS2671847+1824
📊

Passing Visuals

Category:
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🔥Passing Intensity

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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