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BOSTON MARATHON 2023

Masaru Nakagawa

Bib: 8560•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 40%
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Top 44%
Division (M60-64)
#0 / 1110
Top 11%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:49
Rank: #3687
Start → 5K
20:49 | 6:42/mi
10K· 6.21 mi
42:29
Rank: #5293 (-1606)
5K → 10K
21:40 | 6:58/mi
15K· 9.32 mi
1:04:50
Rank: #6228 (-935)
10K → 15K
22:21 | 7:12/mi
20K· 12.43 mi
1:28:03
Rank: #6841 (-613)
15K → 20K
23:13 | 7:28/mi
Half· 13.11 mi
1:33:05
Rank: #6941 (-100)
20K → Half
5:02 | 7:23/mi
25K· 15.53 mi
1:51:58
Rank: #7414 (-473)
Half → 25K
18:53 | 7:47/mi
30K· 18.64 mi
2:17:47
Rank: #8291 (-877)
25K → 30K
25:49 | 8:19/mi
20M
2:29:17
Rank: #8667 (-376)
30K → 20M
11:30 | 8:28/mi
21M
2:38:29
Rank: #9004 (-337)
20M → 21M
9:12 | 9:12/mi
35K· 21.75 mi
2:44:42
Rank: #9183 (-179)
21M → 35K
6:13 | 8:19/mi
23M
2:55:54
Rank: #9594 (-411)
35K → 23M
11:12 | 8:57/mi
24M
3:05:03
Rank: #10028 (-434)
23M → 24M
9:09 | 9:09/mi
40K· 24.85 mi
3:13:06
Rank: #10391 (-363)
24M → 40K
8:03 | 9:25/mi
25.2M
3:16:27
Rank: #10498 (-107)
40K → 25.2M
3:21 | 9:43/mi
Finish· 26.22 mi
3:24:59
Rank: #10640 (-142)
25.2M → Finish
8:32 | 8:22/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:33:05
Pace7:06 /mi
2nd Half
Distance13.11 mi
Time1:51:54
Pace8:32 /mi
📊Positive Split: 20.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:45:5320:496:4220:49
6:42
-
10K
6.21 mi11:07:3342:296:5021:40
6:58
+0:16
15K
9.32 mi11:29:541:04:506:5722:21
7:12
+0:14
20K
12.43 mi11:53:071:28:037:0523:13
7:28
+0:16
Half
13.11 mi11:58:091:33:057:065:02
7:23
-0:05
25K
15.53 mi12:17:021:51:587:1218:53
7:47
+0:24
30K
18.64 mi12:42:512:17:477:2325:49
8:19
+0:32
20M
20.00 mi12:54:212:29:177:2811:30
8:28
+0:09
21M
21.00 mi13:03:332:38:297:339:12
9:12
+0:44
35K
21.75 mi13:09:462:44:427:346:13
8:19
-0:53
23M
23.00 mi13:20:582:55:547:3911:12
8:57
+0:38
24M
24.00 mi13:30:073:05:037:439:09
9:09
+0:12
40K
24.85 mi13:38:103:13:067:468:03
9:25
+0:16
25.2M
25.20 mi13:41:313:16:277:483:21
9:43
+0:18
Finish
26.22 mi13:50:033:24:597:498:32
8:22
-1:21

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

6:42 /mi

Average Pace

7:49 /mi

Slowest Pace

9:43 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:51:58

55% of race

Time at Steady Pace

52:04

25% of race

Time at Slower Pace

40:57

20% of race

Average Pace: 7:49 /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 mi10:45:5320:496:4220:49
6:42
#3687
10K
6.21 mi11:07:3342:296:5021:40
6:58
#5293
15K
9.32 mi11:29:541:04:506:5722:21
7:12
#6228
20K
12.43 mi11:53:071:28:037:0523:13
7:28
#6841
Half
13.11 mi11:58:091:33:057:065:02
7:23
#6941
25K
15.53 mi12:17:021:51:587:1218:53
7:47
#7414
30K
18.64 mi12:42:512:17:477:2325:49
8:19
#8291
20M
20.00 mi12:54:212:29:177:2811:30
8:28
#8667
21M
21.00 mi13:03:332:38:297:339:12
9:12
#9004
35K
21.75 mi13:09:462:44:427:346:13
8:19
#9183
23M
23.00 mi13:20:582:55:547:3911:12
8:57
#9594
24M
24.00 mi13:30:073:05:037:439:09
9:09
#10028
40K
24.85 mi13:38:103:13:067:468:03
9:25
#10391
25.2M
25.20 mi13:41:313:16:277:483:21
9:43
#10498
Finish
26.22 mi13:50:033:24:597:498:32
8:22
#10640
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM60-64Seg. OverallSeg. MalesSeg. M60-64
5K3.11 mi3.11 mi3687347134717761(Top 29%)6761(Top 45%)6761(Top 609%)
10K6.21 mi3.10 mi5293-16064897-14264897-14266654(Top 25%)5976(Top 39%)5976(Top 538%)
15K9.32 mi3.11 mi6228-9355657-7605657-7607761(Top 29%)6761(Top 45%)6761(Top 609%)
20K12.43 mi3.11 mi6841-6136135-4786135-4789103(Top 34%)7561(Top 50%)7561(Top 681%)
Half13.11 mi0.68 mi6941-1006202-676202-679240(Top 35%)7675(Top 51%)7675(Top 691%)
25K15.53 mi2.42 mi7414-4736539-3376539-33710984(Top 41%)8490(Top 56%)8490(Top 765%)
30K18.64 mi3.11 mi8291-8777056-5177056-51713075(Top 49%)9258(Top 61%)9258(Top 834%)
20M20.00 mi1.36 mi8667-3767277-2217277-22113387(Top 50%)9299(Top 61%)9299(Top 838%)
21M21.00 mi1.00 mi9004-3377460-1837460-18314445(Top 54%)9685(Top 64%)9685(Top 873%)
35K21.75 mi0.75 mi9183-1797550-907550-9014102(Top 53%)9457(Top 62%)9457(Top 852%)
23M23.00 mi1.25 mi9594-4117764-2147764-21415741(Top 59%)10115(Top 67%)10115(Top 911%)
24M24.00 mi1.00 mi10028-4347968-2047968-20417835(Top 67%)10989(Top 72%)10989(Top 990%)
40K24.85 mi0.85 mi10391-3638125-1578125-15717985(Top 68%)11013(Top 73%)11013(Top 992%)
25.2M25.20 mi0.35 mi10498-1078166-418166-4116093(Top 60%)10137(Top 67%)10137(Top 913%)
Finish26.22 mi1.02 mi10640-1428217-518217-5114526(Top 55%)9495(Top 63%)9495(Top 855%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 29%
×21stories
+97ft-345ft

Overall

7761

Males

6761

M60-64

6761

5K→10K

3.1 - 6.2 mi

Top 25%
×5stories
+79ft-138ft

Overall

6654

Males

5976

M60-64

5976

10K→15K

6.2 - 9.3 mi

Top 29%
×3stories
+67ft-78ft

Overall

7761

Males

6761

M60-64

6761

15K→20K

9.3 - 12.4 mi

Top 34%
×5stories
+106ft-86ft

Overall

9103

Males

7561

M60-64

7561

20K→Half

12.4 - 13.1 mi

Top 35%
×2stories
+19ft-37ft

Overall

9240

Males

7675

M60-64

7675

Half→25K

13.1 - 15.5 mi

Top 41%
×4stories
+66ft-88ft

Overall

10984

Males

8490

M60-64

8490

25K→30K

15.5 - 18.6 mi

Top 49%
×9stories
+181ft-148ft

Overall

13075

Males

9258

M60-64

9258

30K→20M

18.6 - 20.0 mi

Top 50%
×5stories
+64ft-50ft

Overall

13387

Males

9299

M60-64

9299

20M→21M

20.0 - 21.0 mi

Top 54%
×8stories
+106ft-24ft

Overall

14445

Males

9685

M60-64

9685

21M→35K

21.0 - 21.8 mi

Top 53%
×7stories
+17ft-86ft

Overall

14102

Males

9457

M60-64

9457

35K→23M

21.8 - 23.0 mi

Top 59%
×5stories
+23ft-63ft

Overall

15741

Males

10115

M60-64

10115

23M→24M

23.0 - 24.0 mi

Top 67%
×6stories
+12ft-82ft

Overall

17835

Males

10989

M60-64

10989

24M→40K

24.0 - 24.9 mi

Top 68%
×1story
+6ft-20ft

Overall

17985

Males

11013

M60-64

11013

40K→25.2M

24.9 - 25.2 mi

Top 60%
×1story
+13ft-16ft

Overall

16093

Males

10137

M60-64

10137

25.2M→Finish

25.2 - 26.2 mi

Top 55%
×2stories
+22ft-21ft

Overall

14526

Males

9495

M60-64

9495

Passing Analysis

Category:
Athletes Passed
200
Passed By
7151
Net Change
-6953
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#3687
5K → 10K51611-1606#3687#5293
10K → 15K6941-935#5293#6228
15K → 20K14627-613#6228#6841
20K → Half3103-100#6841#6941
Half → 25K12485-473#6941#7414
25K → 30K17894-877#7414#8291
30K → 20M21397-376#8291#8667
20M → 21M20357-337#8667#9004
21M → 35K9188-179#9004#9183
35K → 23M25436-411#9183#9594
23M → 24M7439-434#9594#10028
24M → 40K14377-363#10028#10391
40K → 25.2M9116-107#10391#10498
25.2M → Finish38180-142#10498#10640
TOTALS2007151-6953
📊

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