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BOSTON MARATHON 2023

Sean Nakamura

Bib: 8966•M

CA

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M40-44)
#0 / 2241
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
23:19
Rank: #9677
Start → 5K
23:19 | 7:30/mi
10K· 6.21 mi
48:17
Rank: #12446 (-2769)
5K → 10K
24:58 | 8:02/mi
15K· 9.32 mi
1:14:09
Rank: #14010 (-1564)
10K → 15K
25:52 | 8:20/mi
20K· 12.43 mi
1:41:20
Rank: #15280 (-1270)
15K → 20K
27:11 | 8:45/mi
Half· 13.11 mi
1:47:08
Rank: #15393 (-113)
20K → Half
5:48 | 8:30/mi
25K· 15.53 mi
2:08:43
Rank: #15941 (-548)
Half → 25K
21:35 | 8:54/mi
30K· 18.64 mi
2:38:25
Rank: #16762 (-821)
25K → 30K
29:42 | 9:34/mi
20M
2:51:50
Rank: #17074 (-312)
30K → 20M
13:25 | 9:52/mi
21M
3:02:33
Rank: #17333 (-259)
20M → 21M
10:43 | 10:43/mi
35K· 21.75 mi
3:09:13
Rank: #17341 (-8)
21M → 35K
6:40 | 8:55/mi
23M
3:21:10
Rank: #17445 (-104)
35K → 23M
11:57 | 9:33/mi
24M
3:30:26
Rank: #17512 (-67)
23M → 24M
9:16 | 9:16/mi
40K· 24.85 mi
3:38:38
Rank: #17598 (-86)
24M → 40K
8:12 | 9:35/mi
25.2M
3:42:12
Rank: #17621 (-23)
40K → 25.2M
3:34 | 10:21/mi
Finish· 26.22 mi
3:51:34
Rank: #17682 (-61)
25.2M → Finish
9:22 | 9:11/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:47:08
Pace8:10 /mi
2nd Half
Distance13.11 mi
Time2:04:26
Pace9:30 /mi
📊Positive Split: 16.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:48:2823:197:3023:19
7:30
-
10K
6.21 mi11:13:2648:177:4624:58
8:02
+0:32
15K
9.32 mi11:39:181:14:097:5725:52
8:20
+0:18
20K
12.43 mi12:06:291:41:208:0927:11
8:45
+0:25
Half
13.11 mi12:12:171:47:088:105:48
8:30
-0:15
25K
15.53 mi12:33:522:08:438:1721:35
8:54
+0:24
30K
18.64 mi13:03:342:38:258:3029:42
9:34
+0:40
20M
20.00 mi13:16:592:51:508:3513:25
9:52
+0:18
21M
21.00 mi13:27:423:02:338:4210:43
10:43
+0:51
35K
21.75 mi13:34:223:09:138:426:40
8:55
-1:48
23M
23.00 mi13:46:193:21:108:4511:57
9:33
+0:38
24M
24.00 mi13:55:353:30:268:469:16
9:16
-0:17
40K
24.85 mi14:03:473:38:388:488:12
9:35
+0:19
25.2M
25.20 mi14:07:213:42:128:493:34
10:21
+0:46
Finish
26.22 mi14:16:433:51:348:509:22
9:11
-1:10

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

7:30 /mi

Average Pace

8:50 /mi

Slowest Pace

10:43 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:47:08

46% of race

Time at Steady Pace

1:36:44

42% of race

Time at Slower Pace

27:42

12% of race

Average Pace: 8:50 /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 mi10:48:2823:197:3023:19
7:30
#9677
10K
6.21 mi11:13:2648:177:4624:58
8:02
#12446
15K
9.32 mi11:39:181:14:097:5725:52
8:20
#14010
20K
12.43 mi12:06:291:41:208:0927:11
8:45
#15280
Half
13.11 mi12:12:171:47:088:105:48
8:30
#15393
25K
15.53 mi12:33:522:08:438:1721:35
8:54
#15941
30K
18.64 mi13:03:342:38:258:3029:42
9:34
#16762
20M
20.00 mi13:16:592:51:508:3513:25
9:52
#17074
21M
21.00 mi13:27:423:02:338:4210:43
10:43
#17333
35K
21.75 mi13:34:223:09:138:426:40
8:55
#17341
23M
23.00 mi13:46:193:21:108:4511:57
9:33
#17445
24M
24.00 mi13:55:353:30:268:469:16
9:16
#17512
40K
24.85 mi14:03:473:38:388:488:12
9:35
#17598
25.2M
25.20 mi14:07:213:42:128:493:34
10:21
#17621
Finish
26.22 mi14:16:433:51:348:509:22
9:11
#17682
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi96777976797616692(Top 63%)10948(Top 72%)10948(Top 489%)
10K6.21 mi3.10 mi12446-27699303-13279303-132715062(Top 57%)10336(Top 68%)10336(Top 461%)
15K9.32 mi3.11 mi14010-15649929-6269929-62616692(Top 63%)10948(Top 72%)10948(Top 489%)
20K12.43 mi3.11 mi15280-127010403-47410403-47418402(Top 69%)11642(Top 77%)11642(Top 520%)
Half13.11 mi0.68 mi15393-11310443-4010443-4017687(Top 66%)11375(Top 75%)11375(Top 508%)
25K15.53 mi2.42 mi15941-54810623-18010623-18018454(Top 69%)11613(Top 77%)11613(Top 518%)
30K18.64 mi3.11 mi16762-82110910-28710910-28719651(Top 74%)12066(Top 80%)12066(Top 538%)
20M20.00 mi1.36 mi17074-31211038-12811038-12820084(Top 75%)12151(Top 80%)12151(Top 542%)
21M21.00 mi1.00 mi17333-25911117-7911117-7920172(Top 76%)12129(Top 80%)12129(Top 541%)
35K21.75 mi0.75 mi17341-811112+511112+517488(Top 66%)10926(Top 72%)10926(Top 488%)
23M23.00 mi1.25 mi17445-10411135-2311135-2318477(Top 69%)11336(Top 75%)11336(Top 506%)
24M24.00 mi1.00 mi17512-6711154-1911154-1918315(Top 69%)11228(Top 74%)11228(Top 501%)
40K24.85 mi0.85 mi17598-8611174-2011174-2018627(Top 70%)11317(Top 75%)11317(Top 505%)
25.2M25.20 mi0.35 mi17621-2311176-211176-218571(Top 70%)11280(Top 74%)11280(Top 503%)
Finish26.22 mi1.02 mi17682-6111196-2011196-2018853(Top 71%)11469(Top 76%)11469(Top 512%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 63%
×21stories
+97ft-345ft

Overall

16692

Males

10948

M40-44

10948

5K→10K

3.1 - 6.2 mi

Top 57%
×5stories
+79ft-138ft

Overall

15062

Males

10336

M40-44

10336

10K→15K

6.2 - 9.3 mi

Top 63%
×3stories
+67ft-78ft

Overall

16692

Males

10948

M40-44

10948

15K→20K

9.3 - 12.4 mi

Top 69%
×5stories
+106ft-86ft

Overall

18402

Males

11642

M40-44

11642

20K→Half

12.4 - 13.1 mi

Top 66%
×2stories
+19ft-37ft

Overall

17687

Males

11375

M40-44

11375

Half→25K

13.1 - 15.5 mi

Top 69%
×4stories
+66ft-88ft

Overall

18454

Males

11613

M40-44

11613

25K→30K

15.5 - 18.6 mi

Top 74%
×9stories
+181ft-148ft

Overall

19651

Males

12066

M40-44

12066

30K→20M

18.6 - 20.0 mi

Top 75%
×5stories
+64ft-50ft

Overall

20084

Males

12151

M40-44

12151

20M→21M

20.0 - 21.0 mi

Top 76%
×8stories
+106ft-24ft

Overall

20172

Males

12129

M40-44

12129

21M→35K

21.0 - 21.8 mi

Top 66%
×7stories
+17ft-86ft

Overall

17488

Males

10926

M40-44

10926

35K→23M

21.8 - 23.0 mi

Top 69%
×5stories
+23ft-63ft

Overall

18477

Males

11336

M40-44

11336

23M→24M

23.0 - 24.0 mi

Top 69%
×6stories
+12ft-82ft

Overall

18315

Males

11228

M40-44

11228

24M→40K

24.0 - 24.9 mi

Top 70%
×1story
+6ft-20ft

Overall

18627

Males

11317

M40-44

11317

40K→25.2M

24.9 - 25.2 mi

Top 70%
×1story
+13ft-16ft

Overall

18571

Males

11280

M40-44

11280

25.2M→Finish

25.2 - 26.2 mi

Top 71%
×2stories
+22ft-21ft

Overall

18853

Males

11469

M40-44

11469

Passing Analysis

Category:
Athletes Passed
421
Passed By
8424
Net Change
-8005
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#9677
5K → 10K92776-2769#9677#12446
10K → 15K121576-1564#12446#14010
15K → 20K251295-1270#14010#15280
20K → Half15128-113#15280#15393
Half → 25K34582-548#15393#15941
25K → 30K41862-821#15941#16762
30K → 20M22334-312#16762#17074
20M → 21M26285-259#17074#17333
21M → 35K5058-8#17333#17341
35K → 23M57161-104#17341#17445
23M → 24M40107-67#17445#17512
24M → 40K31117-86#17512#17598
40K → 25.2M2245-23#17598#17621
25.2M → Finish3798-61#17621#17682
TOTALS4218424-8005
📊

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