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BOSTON MARATHON 2023

Shinichi Yamashita

Bib: 6270•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 22%
Gender (Male)
#0 / 15176
Top 35%
Masters (Masters Men)
#0 / 9891
Top 21%
Division (M40-44)
#0 / 2241
Top 47%
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
6:46/mi
21:02
↑ 97↓ 3451.5%
10K· 6.21 mi
6:38/mi
41:37
↑ 79↓ 1380.4%
15K· 9.32 mi
6:39/mi
1:02:16
↑ 67↓ 78
20K· 12.43 mi
6:52/mi
1:23:37
↑ 106↓ 860.1%
Half· 13.11 mi
6:50/mi
1:28:17
↑ 19↓ 370.5%
25K· 15.53 mi
7:20/mi
1:46:03
↑ 66↓ 880.2%
30K· 18.64 mi
7:33/mi
2:09:30
↑ 181↓ 1480.2%
20M
7:38/mi
2:19:52
↑ 64↓ 500.2%
21M
8:01/mi
2:27:53
↑ 106↓ 241.6%
35K· 21.75 mi
7:22/mi
2:33:24
↑ 17↓ 861.7%
23M
7:42/mi
2:43:03
↑ 23↓ 630.6%
24M
7:39/mi
2:50:42
↓ 821.3%
40K· 24.85 mi
7:41/mi
2:57:16
↓ 200.3%
25.2M
8:07/mi
3:00:04
↑ 13↓ 160.2%
Finish· 26.22 mi
7:38/mi
3:07:51
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:28:17
Pace6:44 /mi
2nd Half
Distance13.11 mi
Time1:39:34
Pace7:36 /mi
📊Positive Split: 12.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:24:1721:026:4621:02
6:46
-
10K
6.21 mi10:44:5241:376:4220:35
6:38
-0:08
15K
9.32 mi11:05:311:02:166:4120:39
6:39
+0:01
20K
12.43 mi11:26:521:23:376:4421:21
6:52
+0:13
Half
13.11 mi11:31:321:28:176:444:40
6:50
-0:02
25K
15.53 mi11:49:181:46:036:5017:46
7:20
+0:30
30K
18.64 mi12:12:452:09:306:5723:27
7:33
+0:13
20M
20.00 mi12:23:072:19:527:0010:22
7:38
+0:05
21M
21.00 mi12:31:082:27:537:038:01
8:01
+0:23
35K
21.75 mi12:36:392:33:247:035:31
7:22
-0:39
23M
23.00 mi12:46:182:43:037:059:39
7:42
+0:20
24M
24.00 mi12:53:572:50:427:077:39
7:39
-0:03
40K
24.85 mi13:00:312:57:167:086:34
7:41
+0:02
25.2M
25.20 mi13:03:193:00:047:092:48
8:07
+0:26
Finish
26.22 mi13:11:063:07:517:107:47
7:38
-0:29

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

6:38 /mi

Average Pace

7:10 /mi

Slowest Pace

8:07 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:28:17

47% of race

Time at Steady Pace

1:28:45

47% of race

Time at Slower Pace

10:49

6% of race

Average Pace: 7:10 /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 mi10:24:1721:026:4621:02
6:46
#4374
10K
6.21 mi10:44:5241:376:4220:35
6:38
#3955
15K
9.32 mi11:05:311:02:166:4120:39
6:39
#3826
20K
12.43 mi11:26:521:23:376:4421:21
6:52
#4156
Half
13.11 mi11:31:321:28:176:444:40
6:50
#4217
25K
15.53 mi11:49:181:46:036:5017:46
7:20
#4963
30K
18.64 mi12:12:452:09:306:5723:27
7:33
#5514
20M
20.00 mi12:23:072:19:527:0010:22
7:38
#5606
21M
21.00 mi12:31:082:27:537:038:01
8:01
#5663
35K
21.75 mi12:36:392:33:247:035:31
7:22
#5711
23M
23.00 mi12:46:182:43:037:059:39
7:42
#5752
24M
24.00 mi12:53:572:50:427:077:39
7:39
#5799
40K
24.85 mi13:00:312:57:167:086:34
7:41
#5823
25.2M
25.20 mi13:03:193:00:047:092:48
8:07
#5830
Finish
26.22 mi13:11:063:07:517:107:47
7:38
#5900
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi4374408540853677(Top 14%)3468(Top 23%)3468(Top 155%)
10K6.21 mi3.10 mi3955+4193724+3613724+3613696(Top 14%)3492(Top 23%)3492(Top 156%)
15K9.32 mi3.11 mi3826+1293610+1143610+1143677(Top 14%)3468(Top 23%)3468(Top 155%)
20K12.43 mi3.11 mi4156-3303900-2903900-2905135(Top 19%)4750(Top 31%)4750(Top 212%)
Half13.11 mi0.68 mi4217-613954-543954-545612(Top 21%)5172(Top 34%)5172(Top 231%)
25K15.53 mi2.42 mi4963-7464614-6604614-6607437(Top 28%)6439(Top 42%)6439(Top 287%)
30K18.64 mi3.11 mi5514-5515077-4635077-4637541(Top 28%)6409(Top 42%)6409(Top 286%)
20M20.00 mi1.36 mi5606-925145-685145-687645(Top 29%)6361(Top 42%)6361(Top 284%)
21M21.00 mi1.00 mi5663-575189-445189-447412(Top 28%)6116(Top 40%)6116(Top 273%)
35K21.75 mi0.75 mi5711-485221-325221-327572(Top 28%)6214(Top 41%)6214(Top 277%)
23M23.00 mi1.25 mi5752-415226-55226-57732(Top 29%)6257(Top 41%)6257(Top 279%)
24M24.00 mi1.00 mi5799-475255-295255-298700(Top 33%)6718(Top 44%)6718(Top 300%)
40K24.85 mi0.85 mi5823-245264-95264-97791(Top 29%)6105(Top 40%)6105(Top 272%)
25.2M25.20 mi0.35 mi5830-75263+15263+17122(Top 27%)5636(Top 37%)5636(Top 251%)
Finish26.22 mi1.02 mi5900-705307-445307-449491(Top 36%)6997(Top 46%)6997(Top 312%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 14%
×21story building
+97ft-345ft

Overall

3677

Males

3468

M40-44

3468

5K→10K

3.1 - 6.2 mi

Top 14%
×5story building
+79ft-138ft

Overall

3696

Males

3492

M40-44

3492

10K→15K

6.2 - 9.3 mi

Top 14%
×3story building
+67ft-78ft

Overall

3677

Males

3468

M40-44

3468

15K→20K

9.3 - 12.4 mi

Top 19%
×5story building
+106ft-86ft

Overall

5135

Males

4750

M40-44

4750

20K→Half

12.4 - 13.1 mi

Top 21%
×2story building
+19ft-37ft

Overall

5612

Males

5172

M40-44

5172

Half→25K

13.1 - 15.5 mi

Top 28%
×4story building
+66ft-88ft

Overall

7437

Males

6439

M40-44

6439

25K→30K

15.5 - 18.6 mi

Top 28%
×9story building
+181ft-148ft

Overall

7541

Males

6409

M40-44

6409

30K→20M

18.6 - 20.0 mi

Top 29%
×5story building
+64ft-50ft

Overall

7645

Males

6361

M40-44

6361

20M→21M

20.0 - 21.0 mi

Top 28%
×8story building
+106ft-24ft

Overall

7412

Males

6116

M40-44

6116

21M→35K

21.0 - 21.8 mi

Top 28%
×7story building
+17ft-86ft

Overall

7572

Males

6214

M40-44

6214

35K→23M

21.8 - 23.0 mi

Top 29%
×5story building
+23ft-63ft

Overall

7732

Males

6257

M40-44

6257

23M→24M

23.0 - 24.0 mi

Top 33%
×6story building
+12ft-82ft

Overall

8700

Males

6718

M40-44

6718

24M→40K

24.0 - 24.9 mi

Top 29%
×1story
+6ft-20ft

Overall

7791

Males

6105

M40-44

6105

40K→25.2M

24.9 - 25.2 mi

Top 27%
×1story
+13ft-16ft

Overall

7122

Males

5636

M40-44

5636

25.2M→Finish

25.2 - 26.2 mi

Top 36%
×2story building
+22ft-21ft

Overall

9491

Males

6997

M40-44

6997

Passing Analysis

Category:
Athletes Passed
1035
Passed By
2561
Net Change
-1526
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#4374
5K → 10K49677+419#4374#3955
10K → 15K18960+129#3955#3826
15K → 20K31361-330#3826#4156
20K → Half465-61#4156#4217
Half → 25K16762-746#4217#4963
25K → 30K33584-551#4963#5514
30K → 20M27119-92#5514#5606
20M → 21M3289-57#5606#5663
21M → 35K2371-48#5663#5711
35K → 23M5697-41#5711#5752
23M → 24M3481-47#5752#5799
24M → 40K3963-24#5799#5823
40K → 25.2M1724-7#5823#5830
25.2M → Finish38108-70#5830#5900
TOTALS10352561-1526
📊

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