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BOSTON MARATHON 2023

Kaz Naganuma

Bib: 18477•M

MA

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M60-64)
#0 / 1110
Top 25%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
25:53
Rank: #16343
Start → 5K
25:53 | 8:20/mi
10K· 6.21 mi
51:31
Rank: #16432 (-89)
5K → 10K
25:38 | 8:15/mi
15K· 9.32 mi
1:17:03
Rank: #16276 (+156)
10K → 15K
25:32 | 8:13/mi
20K· 12.43 mi
1:42:39
Rank: #15974 (+302)
15K → 20K
25:36 | 8:14/mi
Half· 13.11 mi
1:48:14
Rank: #15954 (+20)
20K → Half
5:35 | 8:11/mi
25K· 15.53 mi
2:08:19
Rank: #15750 (+204)
Half → 25K
20:05 | 8:17/mi
30K· 18.64 mi
2:34:05
Rank: #15229 (+521)
25K → 30K
25:46 | 8:18/mi
20M
2:45:26
Rank: #15048 (+181)
30K → 20M
11:21 | 8:21/mi
21M
2:54:00
Rank: #14791 (+257)
20M → 21M
8:34 | 8:34/mi
35K· 21.75 mi
3:00:09
Rank: #14733 (+58)
21M → 35K
6:09 | 8:13/mi
23M
3:10:41
Rank: #14596 (+137)
35K → 23M
10:32 | 8:25/mi
24M
3:18:50
Rank: #14472 (+124)
23M → 24M
8:09 | 8:09/mi
40K· 24.85 mi
3:25:57
Rank: #14384 (+88)
24M → 40K
7:07 | 8:19/mi
25.2M
3:28:51
Rank: #14290 (+94)
40K → 25.2M
2:54 | 8:25/mi
Finish· 26.22 mi
3:36:38
Rank: #14090 (+200)
25.2M → Finish
7:47 | 7:38/mi

The Course

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Half Splits

1st Half· via Half⚖️ Balanced
Distance13.11 mi
Time1:48:14
Pace8:15 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:48:24
Pace8:16 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:17:3125:538:2025:53
8:20
-
10K
6.21 mi11:43:0951:318:1725:38
8:15
-0:05
15K
9.32 mi12:08:411:17:038:1625:32
8:13
-0:02
20K
12.43 mi12:34:171:42:398:1625:36
8:14
+0:01
Half
13.11 mi12:39:521:48:148:155:35
8:11
-0:03
25K
15.53 mi12:59:572:08:198:1620:05
8:17
+0:06
30K
18.64 mi13:25:432:34:058:1625:46
8:18
+0:01
20M
20.00 mi13:37:042:45:268:1611:21
8:21
+0:03
21M
21.00 mi13:45:382:54:008:178:34
8:34
+0:13
35K
21.75 mi13:51:473:00:098:176:09
8:13
-0:21
23M
23.00 mi14:02:193:10:418:1710:32
8:25
+0:12
24M
24.00 mi14:10:283:18:508:178:09
8:09
-0:16
40K
24.85 mi14:17:353:25:578:177:07
8:19
+0:10
25.2M
25.20 mi14:20:293:28:518:172:54
8:25
+0:06
Finish
26.22 mi14:28:163:36:388:167:47
7:38
-0:47

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

7:38 /mi

Average Pace

8:16 /mi

Slowest Pace

8:34 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:14:38

90% of race

Time at Steady Pace

22:00

10% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:16 /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 mi11:17:3125:538:2025:53
8:20
#16343
10K
6.21 mi11:43:0951:318:1725:38
8:15
#16432
15K
9.32 mi12:08:411:17:038:1625:32
8:13
#16276
20K
12.43 mi12:34:171:42:398:1625:36
8:14
#15974
Half
13.11 mi12:39:521:48:148:155:35
8:11
#15954
25K
15.53 mi12:59:572:08:198:1620:05
8:17
#15750
30K
18.64 mi13:25:432:34:058:1625:46
8:18
#15229
20M
20.00 mi13:37:042:45:268:1611:21
8:21
#15048
21M
21.00 mi13:45:382:54:008:178:34
8:34
#14791
35K
21.75 mi13:51:473:00:098:176:09
8:13
#14733
23M
23.00 mi14:02:193:10:418:1710:32
8:25
#14596
24M
24.00 mi14:10:283:18:508:178:09
8:09
#14472
40K
24.85 mi14:17:353:25:578:177:07
8:19
#14384
25.2M
25.20 mi14:20:293:28:518:172:54
8:25
#14290
Finish
26.22 mi14:28:163:36:388:167:47
7:38
#14090
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM60-64Seg. OverallSeg. MalesSeg. M60-64
5K3.11 mi3.11 mi16343108261082615973(Top 60%)10668(Top 70%)10668(Top 961%)
10K6.21 mi3.10 mi16432-8910867-4110867-4116575(Top 62%)10928(Top 72%)10928(Top 985%)
15K9.32 mi3.11 mi16276+15610801+6610801+6615973(Top 60%)10668(Top 70%)10668(Top 961%)
20K12.43 mi3.11 mi15974+30210662+13910662+13915198(Top 57%)10346(Top 68%)10346(Top 932%)
Half13.11 mi0.68 mi15954+2010653+910653+915610(Top 59%)10518(Top 69%)10518(Top 948%)
25K15.53 mi2.42 mi15750+20410553+10010553+10014819(Top 56%)10084(Top 66%)10084(Top 908%)
30K18.64 mi3.11 mi15229+52110310+24310310+24312980(Top 49%)9222(Top 61%)9222(Top 831%)
20M20.00 mi1.36 mi15048+18110226+8410226+8412698(Top 48%)9007(Top 59%)9007(Top 811%)
21M21.00 mi1.00 mi14791+25710113+11310113+11310870(Top 41%)8067(Top 53%)8067(Top 727%)
35K21.75 mi0.75 mi14733+5810070+4310070+4313559(Top 51%)9219(Top 61%)9219(Top 831%)
23M23.00 mi1.25 mi14596+1379994+769994+7612651(Top 48%)8760(Top 58%)8760(Top 789%)
24M24.00 mi1.00 mi14472+1249918+769918+7612243(Top 46%)8516(Top 56%)8516(Top 767%)
40K24.85 mi0.85 mi14384+889858+609858+6012203(Top 46%)8413(Top 55%)8413(Top 758%)
25.2M25.20 mi0.35 mi14290+949811+479811+478981(Top 34%)6754(Top 45%)6754(Top 608%)
Finish26.22 mi1.02 mi14090+2009718+939718+939550(Top 36%)7056(Top 46%)7056(Top 636%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 60%
×21stories
+97ft-345ft

Overall

15973

Males

10668

M60-64

10668

5K→10K

3.1 - 6.2 mi

Top 62%
×5stories
+79ft-138ft

Overall

16575

Males

10928

M60-64

10928

10K→15K

6.2 - 9.3 mi

Top 60%
×3stories
+67ft-78ft

Overall

15973

Males

10668

M60-64

10668

15K→20K

9.3 - 12.4 mi

Top 57%
×5stories
+106ft-86ft

Overall

15198

Males

10346

M60-64

10346

20K→Half

12.4 - 13.1 mi

Top 59%
×2stories
+19ft-37ft

Overall

15610

Males

10518

M60-64

10518

Half→25K

13.1 - 15.5 mi

Top 56%
×4stories
+66ft-88ft

Overall

14819

Males

10084

M60-64

10084

25K→30K

15.5 - 18.6 mi

Top 49%
×9stories
+181ft-148ft

Overall

12980

Males

9222

M60-64

9222

30K→20M

18.6 - 20.0 mi

Top 48%
×5stories
+64ft-50ft

Overall

12698

Males

9007

M60-64

9007

20M→21M

20.0 - 21.0 mi

Top 41%
×8stories
+106ft-24ft

Overall

10870

Males

8067

M60-64

8067

21M→35K

21.0 - 21.8 mi

Top 51%
×7stories
+17ft-86ft

Overall

13559

Males

9219

M60-64

9219

35K→23M

21.8 - 23.0 mi

Top 48%
×5stories
+23ft-63ft

Overall

12651

Males

8760

M60-64

8760

23M→24M

23.0 - 24.0 mi

Top 46%
×6stories
+12ft-82ft

Overall

12243

Males

8516

M60-64

8516

24M→40K

24.0 - 24.9 mi

Top 46%
×1story
+6ft-20ft

Overall

12203

Males

8413

M60-64

8413

40K→25.2M

24.9 - 25.2 mi

Top 34%
×1story
+13ft-16ft

Overall

8981

Males

6754

M60-64

6754

25.2M→Finish

25.2 - 26.2 mi

Top 36%
×2stories
+22ft-21ft

Overall

9550

Males

7056

M60-64

7056

Passing Analysis

Category:
Athletes Passed
2923
Passed By
670
Net Change
+2253
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#16343
5K → 10K247336-89#16343#16432
10K → 15K275119+156#16432#16276
15K → 20K34745+302#16276#15974
20K → Half3919+20#15974#15954
Half → 25K24642+204#15954#15750
25K → 30K5287+521#15750#15229
30K → 20M19514+181#15229#15048
20M → 21M2581+257#15048#14791
21M → 35K8022+58#14791#14733
35K → 23M15821+137#14733#14596
23M → 24M14521+124#14596#14472
24M → 40K10517+88#14472#14384
40K → 25.2M951+94#14384#14290
25.2M → Finish2055+200#14290#14090
TOTALS2923670+2253
📊

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