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BOSTON MARATHON 2023

Shuichi Nagai

Bib: 13559•M

NJ

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 36%
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Top 39%
Division (M45-49)
#0 / 2252
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
7:43/mi
24:00
↑ 97↓ 3451.5%
10K· 6.21 mi
7:41/mi
47:52
↑ 79↓ 1380.4%
15K· 9.32 mi
7:33/mi
1:11:20
↑ 67↓ 78
20K· 12.43 mi
7:39/mi
1:35:06
↑ 106↓ 860.1%
Half· 13.11 mi
7:18/mi
1:40:05
↑ 19↓ 370.5%
25K· 15.53 mi
7:31/mi
1:58:19
↑ 66↓ 880.2%
30K· 18.64 mi
7:28/mi
2:21:32
↑ 181↓ 1480.2%
20M
7:31/mi
2:31:45
↑ 64↓ 500.2%
21M
7:56/mi
2:39:41
↑ 106↓ 241.6%
35K· 21.75 mi
7:26/mi
2:45:15
↑ 17↓ 861.7%
23M
7:51/mi
2:55:05
↑ 23↓ 630.6%
24M
7:48/mi
3:02:53
↓ 821.3%
40K· 24.85 mi
8:17/mi
3:09:58
↓ 200.3%
25.2M
8:54/mi
3:13:02
↑ 13↓ 160.2%
Finish· 26.22 mi
8:02/mi
3:21:13
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:40:05
Pace7:38 /mi
2nd Half
Distance13.11 mi
Time1:41:08
Pace7:43 /mi
📊Positive Split: 1.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:52:1924:007:4324:00
7:43
-
10K
6.21 mi11:16:1147:527:4223:52
7:41
-0:02
15K
9.32 mi11:39:391:11:207:3923:28
7:33
-0:08
20K
12.43 mi12:03:251:35:067:3923:46
7:39
+0:06
Half
13.11 mi12:08:241:40:057:384:59
7:18
-0:21
25K
15.53 mi12:26:381:58:197:3718:14
7:31
+0:13
30K
18.64 mi12:49:512:21:327:3623:13
7:28
-0:03
20M
20.00 mi13:00:042:31:457:3510:13
7:31
+0:03
21M
21.00 mi13:08:002:39:417:367:56
7:56
+0:25
35K
21.75 mi13:13:342:45:157:365:34
7:26
-0:30
23M
23.00 mi13:23:242:55:057:379:50
7:51
+0:25
24M
24.00 mi13:31:123:02:537:377:48
7:48
-0:03
40K
24.85 mi13:38:173:09:587:397:05
8:17
+0:29
25.2M
25.20 mi13:41:213:13:027:403:04
8:54
+0:37
Finish
26.22 mi13:49:323:21:137:418:11
8:02
-0:52

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

7:18 /mi

Average Pace

7:41 /mi

Slowest Pace

8:54 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

33:46

17% of race

Time at Steady Pace

2:21:11

70% of race

Time at Slower Pace

26:16

13% of race

Average Pace: 7:40 /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 mi10:52:1924:007:4324:00
7:43
#11664
10K
6.21 mi11:16:1147:527:4223:52
7:41
#11833
15K
9.32 mi11:39:391:11:207:3923:28
7:33
#11380
20K
12.43 mi12:03:251:35:067:3923:46
7:39
#11121
Half
13.11 mi12:08:241:40:057:384:59
7:18
#10998
25K
15.53 mi12:26:381:58:197:3718:14
7:31
#10621
30K
18.64 mi12:49:512:21:327:3623:13
7:28
#9917
20M
20.00 mi13:00:042:31:457:3510:13
7:31
#9648
21M
21.00 mi13:08:002:39:417:367:56
7:56
#9466
35K
21.75 mi13:13:342:45:157:365:34
7:26
#9384
23M
23.00 mi13:23:242:55:057:379:50
7:51
#9299
24M
24.00 mi13:31:123:02:537:377:48
7:48
#9294
40K
24.85 mi13:38:173:09:587:397:05
8:17
#9392
25.2M
25.20 mi13:41:213:13:027:403:04
8:54
#9408
Finish
26.22 mi13:49:323:21:137:418:11
8:02
#9505
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi116648970897010581(Top 40%)8438(Top 56%)8438(Top 375%)
10K6.21 mi3.10 mi11833-1699034-649034-6412049(Top 45%)9128(Top 60%)9128(Top 405%)
15K9.32 mi3.11 mi11380+4538828+2068828+20610581(Top 40%)8438(Top 56%)8438(Top 375%)
20K12.43 mi3.11 mi11121+2598713+1158713+11510490(Top 39%)8332(Top 55%)8332(Top 370%)
Half13.11 mi0.68 mi10998+1238650+638650+638626(Top 32%)7290(Top 48%)7290(Top 324%)
25K15.53 mi2.42 mi10621+3778447+2038447+2038915(Top 33%)7380(Top 49%)7380(Top 328%)
30K18.64 mi3.11 mi9917+7048045+4028045+4027045(Top 26%)6103(Top 40%)6103(Top 271%)
20M20.00 mi1.36 mi9648+2697863+1827863+1826917(Top 26%)5926(Top 39%)5926(Top 263%)
21M21.00 mi1.00 mi9466+1827733+1307733+1306935(Top 26%)5831(Top 38%)5831(Top 259%)
35K21.75 mi0.75 mi9384+827668+657668+658081(Top 30%)6552(Top 43%)6552(Top 291%)
23M23.00 mi1.25 mi9299+857594+747594+748753(Top 33%)6834(Top 45%)6834(Top 303%)
24M24.00 mi1.00 mi9294+57568+267568+269768(Top 37%)7274(Top 48%)7274(Top 323%)
40K24.85 mi0.85 mi9392-987595-277595-2711880(Top 45%)8259(Top 54%)8259(Top 367%)
25.2M25.20 mi0.35 mi9408-167591+47591+411799(Top 44%)8142(Top 54%)8142(Top 362%)
Finish26.22 mi1.02 mi9505-977624-337624-3312312(Top 46%)8426(Top 56%)8426(Top 374%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 40%
×21story building
+97ft-345ft

Overall

10581

Males

8438

M45-49

8438

5K→10K

3.1 - 6.2 mi

Top 45%
×5story building
+79ft-138ft

Overall

12049

Males

9128

M45-49

9128

10K→15K

6.2 - 9.3 mi

Top 40%
×3story building
+67ft-78ft

Overall

10581

Males

8438

M45-49

8438

15K→20K

9.3 - 12.4 mi

Top 39%
×5story building
+106ft-86ft

Overall

10490

Males

8332

M45-49

8332

20K→Half

12.4 - 13.1 mi

Top 32%
×2story building
+19ft-37ft

Overall

8626

Males

7290

M45-49

7290

Half→25K

13.1 - 15.5 mi

Top 33%
×4story building
+66ft-88ft

Overall

8915

Males

7380

M45-49

7380

25K→30K

15.5 - 18.6 mi

Top 26%
×9story building
+181ft-148ft

Overall

7045

Males

6103

M45-49

6103

30K→20M

18.6 - 20.0 mi

Top 26%
×5story building
+64ft-50ft

Overall

6917

Males

5926

M45-49

5926

20M→21M

20.0 - 21.0 mi

Top 26%
×8story building
+106ft-24ft

Overall

6935

Males

5831

M45-49

5831

21M→35K

21.0 - 21.8 mi

Top 30%
×7story building
+17ft-86ft

Overall

8081

Males

6552

M45-49

6552

35K→23M

21.8 - 23.0 mi

Top 33%
×5story building
+23ft-63ft

Overall

8753

Males

6834

M45-49

6834

23M→24M

23.0 - 24.0 mi

Top 37%
×6story building
+12ft-82ft

Overall

9768

Males

7274

M45-49

7274

24M→40K

24.0 - 24.9 mi

Top 45%
×1story
+6ft-20ft

Overall

11880

Males

8259

M45-49

8259

40K→25.2M

24.9 - 25.2 mi

Top 44%
×1story
+13ft-16ft

Overall

11799

Males

8142

M45-49

8142

25.2M→Finish

25.2 - 26.2 mi

Top 46%
×2story building
+22ft-21ft

Overall

12312

Males

8426

M45-49

8426

Passing Analysis

Category:
Athletes Passed
3069*
Passed By
910
Net Change
+2159
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#11664
5K → 10K230399-169#11664#11833
10K → 15K49441+453#11833#11380
15K → 20K30344+259#11380#11121
20K → Half1230+123#11121#10998
Half → 25K3792+377#10998#10621
25K → 30K705*1+704#10621#9917
30K → 20M2712+269#9917#9648
20M → 21M1875+182#9648#9466
21M → 35K9412+82#9466#9384
35K → 23M12237+85#9384#9299
23M → 24M6964+5#9299#9294
24M → 40K40138-98#9294#9392
40K → 25.2M2339-16#9392#9408
25.2M → Finish29126-97#9408#9505
TOTALS3069*910+2159

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

Passing Visuals

Category:
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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