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BOSTON MARATHON 2026

Kohji Nakagawa

Bib: 14114•M

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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
23:45
3.11 mi
Rank: #14047
Start → 5K
23:45 | 7:39/mi
10K
47:38
6.21 mi
Rank: #14308 (-261)
5K → 10K
23:53 | 7:42/mi
15K
1:12:00
9.32 mi
Rank: #14745 (-437)
10K → 15K
24:22 | 7:51/mi
20K
1:36:48
12.43 mi
Rank: #15071 (-326)
15K → 20K
24:48 | 7:59/mi
HALF
1:42:15
13.11 mi
Rank: #15183 (-112)
20K → HALF
5:27 | 8:00/mi
25K
2:02:09
15.53 mi
Rank: #15466 (-283)
HALF → 25K
19:54 | 8:13/mi
30K
2:28:48
18.64 mi
Rank: #15850 (-384)
25K → 30K
26:39 | 8:35/mi
20M
2:40:30
20.00 mi
Rank: #15927 (-77)
30K → 20M
11:42 | 8:37/mi
21M
2:51:04
21.00 mi
Rank: #16436 (-509)
20M → 21M
10:34 | 10:34/mi
35K
2:57:13
21.75 mi
Rank: #16390 (+46)
21M → 35K
6:09 | 8:14/mi
23M
3:08:35
23.00 mi
Rank: #16548 (-158)
35K → 23M
11:22 | 9:05/mi
24M
3:17:13
24.00 mi
Rank: #16572 (-24)
23M → 24M
8:38 | 8:38/mi
40K
3:24:45
24.85 mi
Rank: #16615 (-43)
24M → 40K
7:32 | 8:49/mi
25.2M
3:28:23
25.20 mi
Rank: #16694 (-79)
40K → 25.2M
3:38 | 10:33/mi
FINISH
3:37:12
26.22 mi
Rank: #16786 (-92)
25.2M → FINISH
8:49 | 8:40/mi

Splits & Pacing

Detailed breakdown of your race performance at each timing point

Half Splits

1st HalfFaster
via HALF
Distance13.11 mi
Time1:42:15
Pace7:48 /mi
2nd Half
Distance13.11 mi
Time1:54:57
Pace8:47 /mi
📊Positive Split: 12.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:53:3523:457:3923:45
7:39
-
10K
6.21 mi11:17:2847:387:4023:53
7:42
+0:03
15K
9.32 mi11:41:501:12:007:4424:22
7:51
+0:09
20K
12.43 mi12:06:381:36:487:4824:48
7:59
+0:08
HALF
13.11 mi12:12:051:42:157:485:27
8:00
+0:01
25K
15.53 mi12:31:592:02:097:5219:54
8:13
+0:13
30K
18.64 mi12:58:382:28:487:5926:39
8:35
+0:22
20M
20.00 mi13:10:202:40:308:0211:42
8:37
+0:02
21M
21.00 mi13:20:542:51:048:0910:34
10:34
+1:57
35K
21.75 mi13:27:032:57:138:096:09
8:14
-2:20
23M
23.00 mi13:38:253:08:358:1211:22
9:05
+0:51
24M
24.00 mi13:47:033:17:138:148:38
8:38
-0:27
40K
24.85 mi13:54:353:24:458:157:32
8:49
+0:11
25.2M
25.20 mi13:58:133:28:238:173:38
10:33
+1:44
FINISH
26.22 mi14:07:023:37:128:188:49
8:40
-1:53

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

7:39 /mi

Average Pace

8:17 /mi

Slowest Pace

10:34 /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

1:42:15

47% of race

Time at Steady Pace

1:29:23

41% of race

Time at Slower Pace

25:34

12% of race

Average Pace: 8:17 /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 mi10:53:3523:457:3923:45
7:39
#14047
10K
6.21 mi11:17:2847:387:4023:53
7:42
#14308
15K
9.32 mi11:41:501:12:007:4424:22
7:51
#14745
20K
12.43 mi12:06:381:36:487:4824:48
7:59
#15071
HALF
13.11 mi12:12:051:42:157:485:27
8:00
#15183
25K
15.53 mi12:31:592:02:097:5219:54
8:13
#15466
30K
18.64 mi12:58:382:28:487:5926:39
8:35
#15850
20M
20.00 mi13:10:202:40:308:0211:42
8:37
#15927
21M
21.00 mi13:20:542:51:048:0910:34
10:34
#16436
35K
21.75 mi13:27:032:57:138:096:09
8:14
#16390
23M
23.00 mi13:38:253:08:358:1211:22
9:05
#16548
24M
24.00 mi13:47:033:17:138:148:38
8:38
#16572
40K
24.85 mi13:54:353:24:458:157:32
8:49
#16615
25.2M
25.20 mi13:58:133:28:238:173:38
10:33
#16694
FINISH
26.22 mi14:07:023:37:128:188:49
8:40
#16786
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 mi140479894989415695(Top 54%)10467(Top 64%)10467(Top 560%)
10K6.21 mi3.10 mi14308-2619976-829976-8214642(Top 50%)10106(Top 62%)10106(Top 541%)
15K9.32 mi3.11 mi14745-43710107-13110107-13115695(Top 54%)10467(Top 64%)10467(Top 560%)
20K12.43 mi3.11 mi15071-32610222-11510222-11515977(Top 55%)10543(Top 65%)10543(Top 564%)
HALF13.11 mi0.68 mi15183-11210262-4010262-4017044(Top 59%)11029(Top 67%)11029(Top 590%)
25K15.53 mi2.42 mi15466-28310352-9010352-9016821(Top 58%)10863(Top 66%)10863(Top 582%)
30K18.64 mi3.11 mi15850-38410467-11510467-11517343(Top 60%)10967(Top 67%)10967(Top 587%)
20M20.00 mi1.36 mi15927-7710479-1210479-1216848(Top 58%)10669(Top 65%)10669(Top 571%)
21M21.00 mi1.00 mi16436-50910680-20110680-20122112(Top 76%)13080(Top 80%)13080(Top 700%)
35K21.75 mi0.75 mi16390+4610655+2510655+2515919(Top 55%)10158(Top 62%)10158(Top 544%)
23M23.00 mi1.25 mi16548-15810694-3910694-3918873(Top 65%)11389(Top 70%)11389(Top 610%)
24M24.00 mi1.00 mi16572-2410692+210692+217630(Top 61%)10764(Top 66%)10764(Top 576%)
40K24.85 mi0.85 mi16615-4310686+610686+617422(Top 60%)10614(Top 65%)10614(Top 568%)
25.2M25.20 mi0.35 mi16694-7910715-2910715-2921093(Top 73%)12390(Top 76%)12390(Top 663%)
FINISH26.22 mi1.02 mi16786-9210731-1610731-1618897(Top 65%)11317(Top 69%)11317(Top 606%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 54%
×21
+97ft-345ft

Overall

15695

Males

10467

M50-54

10467

5K→10K

3.1 - 6.2 mi

Top 50%
×5
+79ft-138ft

Overall

14642

Males

10106

M50-54

10106

10K→15K

6.2 - 9.3 mi

Top 54%
×3
+67ft-78ft

Overall

15695

Males

10467

M50-54

10467

15K→20K

9.3 - 12.4 mi

Top 55%
×5
+106ft-86ft

Overall

15977

Males

10543

M50-54

10543

20K→HALF

12.4 - 13.1 mi

Top 59%
×2
+19ft-37ft

Overall

17044

Males

11029

M50-54

11029

HALF→25K

13.1 - 15.5 mi

Top 58%
×4
+66ft-88ft

Overall

16821

Males

10863

M50-54

10863

25K→30K

15.5 - 18.6 mi

Top 60%
×9
+181ft-148ft

Overall

17343

Males

10967

M50-54

10967

30K→20M

18.6 - 20.0 mi

Top 58%
×5
+64ft-50ft

Overall

16848

Males

10669

M50-54

10669

20M→21M

20.0 - 21.0 mi

Top 76%
×8
+106ft-24ft

Overall

22112

Males

13080

M50-54

13080

21M→35K

21.0 - 21.8 mi

Top 55%
×7
+17ft-86ft

Overall

15919

Males

10158

M50-54

10158

35K→23M

21.8 - 23.0 mi

Top 65%
×5
+23ft-63ft

Overall

18873

Males

11389

M50-54

11389

23M→24M

23.0 - 24.0 mi

Top 61%
×6
+12ft-82ft

Overall

17630

Males

10764

M50-54

10764

24M→40K

24.0 - 24.9 mi

Top 60%
×1
+6ft-20ft

Overall

17422

Males

10614

M50-54

10614

40K→25.2M

24.9 - 25.2 mi

Top 73%
×1
+13ft-16ft

Overall

21093

Males

12390

M50-54

12390

25.2M→FINISH

25.2 - 26.2 mi

Top 65%
×2
+22ft-21ft

Overall

18897

Males

11317

M50-54

11317

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
958
Passed By
3697
Net Change
-2739
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#14047
5K → 10K186447-261#14047#14308
10K → 15K94531-437#14308#14745
15K → 20K82408-326#14745#15071
20K → HALF14126-112#15071#15183
HALF → 25K72355-283#15183#15466
25K → 30K104488-384#15466#15850
30K → 20M64141-77#15850#15927
20M → 21M24533-509#15927#16436
21M → 35K8842+46#16436#16390
35K → 23M59217-158#16390#16548
23M → 24M6084-24#16548#16572
24M → 40K62105-43#16572#16615
40K → 25.2M1392-79#16615#16694
25.2M → FINISH36128-92#16694#16786
TOTALS9583697-2739
📊

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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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing