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BOSTON MARATHON 2023

Akio Matsuzaki

Bib: 23532•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M65-69)
#0 / 549
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
27:21
Rank: #19471
Start → 5K
8:48/mi
27:21 split
10K· 6.21 mi
55:23
Rank: #20272 (-801)
5K → 10K
9:01/mi
28:02 split
15K· 9.32 mi
1:24:08
Rank: #20692 (-420)
10K → 15K
9:15/mi
28:45 split
20K· 12.43 mi
1:54:56
Rank: #21346 (-654)
15K → 20K
9:55/mi
30:48 split
Half· 13.11 mi
2:01:15
Rank: #21338 (+8)
20K → Half
9:16/mi
6:19 split
25K· 15.53 mi
2:24:47
Rank: #21346 (-8)
Half → 25K
9:42/mi
23:32 split
30K· 18.64 mi
2:56:39
Rank: #21403 (-57)
25K → 30K
10:15/mi
31:52 split
20M
3:10:41
Rank: #21396 (+7)
30K → 20M
10:20/mi
14:02 split
21M
3:22:13
Rank: #21436 (-40)
20M → 21M
11:32/mi
11:32 split
35K· 21.75 mi
3:31:10
Rank: #21637 (-201)
21M → 35K
11:58/mi
8:57 split
23M
3:43:39
Rank: #21530 (+107)
35K → 23M
9:58/mi
12:29 split
24M
3:53:24
Rank: #21451 (+79)
23M → 24M
9:45/mi
9:45 split
40K· 24.85 mi
4:01:49
Rank: #21377 (+74)
24M → 40K
9:51/mi
8:25 split
25.2M
4:05:32
Rank: #21328 (+49)
40K → 25.2M
10:47/mi
3:43 split
Finish· 26.22 mi
4:15:42
Rank: #21345 (-17)
25.2M → Finish
9:59/mi
10:10 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:01:15
Pace9:15 /mi
2nd Half
Distance13.11 mi
Time2:14:27
Pace10:15 /mi
📊Positive Split: 10.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:22:1627:218:4827:21
8:48
-
10K
6.21 mi11:50:1855:238:5528:02
9:01
+0:13
15K
9.32 mi12:19:031:24:089:0228:45
9:15
+0:14
20K
12.43 mi12:49:511:54:569:1530:48
9:55
+0:40
Half
13.11 mi12:56:102:01:159:156:19
9:16
-0:39
25K
15.53 mi13:19:422:24:479:1923:32
9:42
+0:26
30K
18.64 mi13:51:342:56:399:2931:52
10:15
+0:33
20M
20.00 mi14:05:363:10:419:3214:02
10:20
+0:05
21M
21.00 mi14:17:083:22:139:3811:32
11:32
+1:12
35K
21.75 mi14:26:053:31:109:438:57
11:58
+0:26
23M
23.00 mi14:38:343:43:399:4312:29
9:58
-2:00
24M
24.00 mi14:48:193:53:249:449:45
9:45
-0:13
40K
24.85 mi14:56:444:01:499:448:25
9:51
+0:06
25.2M
25.20 mi15:00:274:05:329:453:43
10:47
+0:56
Finish
26.22 mi15:10:374:15:429:4610:10
9:59
-0:48

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

8:48 /mi

Average Pace

9:46 /mi

Slowest Pace

11:58 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:30:27

35% of race

Time at Steady Pace

2:21:03

55% of race

Time at Slower Pace

24:12

9% of race

Average Pace: 9:45 /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 mi11:22:1627:218:4827:21
8:48
#19471
10K
6.21 mi11:50:1855:238:5528:02
9:01
#20272
15K
9.32 mi12:19:031:24:089:0228:45
9:15
#20692
20K
12.43 mi12:49:511:54:569:1530:48
9:55
#21346
Half
13.11 mi12:56:102:01:159:156:19
9:16
#21338
25K
15.53 mi13:19:422:24:479:1923:32
9:42
#21346
30K
18.64 mi13:51:342:56:399:2931:52
10:15
#21403
20M
20.00 mi14:05:363:10:419:3214:02
10:20
#21396
21M
21.00 mi14:17:083:22:139:3811:32
11:32
#21436
35K
21.75 mi14:26:053:31:109:438:57
11:58
#21637
23M
23.00 mi14:38:343:43:399:4312:29
9:58
#21530
24M
24.00 mi14:48:193:53:249:449:45
9:45
#21451
40K
24.85 mi14:56:444:01:499:448:25
9:51
#21377
25.2M
25.20 mi15:00:274:05:329:453:43
10:47
#21328
Finish
26.22 mi15:10:374:15:429:4610:10
9:59
#21345
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM65-69Seg. OverallSeg. MalesSeg. M65-69
5K3.11 mi3.11 mi19471119601196021486(Top 81%)12975(Top 85%)12975(Top 2363%)
10K6.21 mi3.10 mi20272-80112346-38612346-38620972(Top 79%)12705(Top 84%)12705(Top 2314%)
15K9.32 mi3.11 mi20692-42012553-20712553-20721486(Top 81%)12975(Top 85%)12975(Top 2363%)
20K12.43 mi3.11 mi21346-65412866-31312866-31322680(Top 85%)13476(Top 89%)13476(Top 2455%)
Half13.11 mi0.68 mi21338+812862+412862+421337(Top 80%)12888(Top 85%)12888(Top 2348%)
25K15.53 mi2.42 mi21346-812869-712869-721468(Top 81%)12905(Top 85%)12905(Top 2351%)
30K18.64 mi3.11 mi21403-5712877-812877-821668(Top 81%)12926(Top 85%)12926(Top 2354%)
20M20.00 mi1.36 mi21396+712860+1712860+1721328(Top 80%)12709(Top 84%)12709(Top 2315%)
21M21.00 mi1.00 mi21436-4012871-1112871-1121926(Top 82%)12950(Top 85%)12950(Top 2359%)
35K21.75 mi0.75 mi21637-20112950-7912950-7924643(Top 93%)14141(Top 93%)14141(Top 2576%)
23M23.00 mi1.25 mi21530+10712894+5612894+5619908(Top 75%)11984(Top 79%)11984(Top 2183%)
24M24.00 mi1.00 mi21451+7912844+5012844+5020054(Top 75%)12032(Top 79%)12032(Top 2192%)
40K24.85 mi0.85 mi21377+7412798+4612798+4619518(Top 73%)11718(Top 77%)11718(Top 2134%)
25.2M25.20 mi0.35 mi21328+4912771+2712771+2719898(Top 75%)11877(Top 78%)11877(Top 2163%)
Finish26.22 mi1.02 mi21345-17127711277121689(Top 81%)12713(Top 84%)12713(Top 2316%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 81%
×21stories
+97ft-345ft

Overall

21486

Males

12975

M65-69

12975

5K→10K

3.1 - 6.2 mi

Top 79%
×5stories
+79ft-138ft

Overall

20972

Males

12705

M65-69

12705

10K→15K

6.2 - 9.3 mi

Top 81%
×3stories
+67ft-78ft

Overall

21486

Males

12975

M65-69

12975

15K→20K

9.3 - 12.4 mi

Top 85%
×5stories
+106ft-86ft

Overall

22680

Males

13476

M65-69

13476

20K→Half

12.4 - 13.1 mi

Top 80%
×2stories
+19ft-37ft

Overall

21337

Males

12888

M65-69

12888

Half→25K

13.1 - 15.5 mi

Top 81%
×4stories
+66ft-88ft

Overall

21468

Males

12905

M65-69

12905

25K→30K

15.5 - 18.6 mi

Top 81%
×9stories
+181ft-148ft

Overall

21668

Males

12926

M65-69

12926

30K→20M

18.6 - 20.0 mi

Top 80%
×5stories
+64ft-50ft

Overall

21328

Males

12709

M65-69

12709

20M→21M

20.0 - 21.0 mi

Top 82%
×8stories
+106ft-24ft

Overall

21926

Males

12950

M65-69

12950

21M→35K

21.0 - 21.8 mi

Top 93%
×7stories
+17ft-86ft

Overall

24643

Males

14141

M65-69

14141

35K→23M

21.8 - 23.0 mi

Top 75%
×5stories
+23ft-63ft

Overall

19908

Males

11984

M65-69

11984

23M→24M

23.0 - 24.0 mi

Top 75%
×6stories
+12ft-82ft

Overall

20054

Males

12032

M65-69

12032

24M→40K

24.0 - 24.9 mi

Top 73%
×1story
+6ft-20ft

Overall

19518

Males

11718

M65-69

11718

40K→25.2M

24.9 - 25.2 mi

Top 75%
×1story
+13ft-16ft

Overall

19898

Males

11877

M65-69

11877

25.2M→Finish

25.2 - 26.2 mi

Top 81%
×2stories
+22ft-21ft

Overall

21689

Males

12713

M65-69

12713

Passing Analysis

Category:
Athletes Passed
920
Passed By
2794
Net Change
-1874
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#19471
5K → 10K72873-801#19471#20272
10K → 15K71491-420#20272#20692
15K → 20K24678-654#20692#21346
20K → Half3123+8#21346#21338
Half → 25K101109-8#21338#21346
25K → 30K102159-57#21346#21403
30K → 20M8477+7#21403#21396
20M → 21M4787-40#21396#21436
21M → 35K4205-201#21436#21637
35K → 23M12316+107#21637#21530
23M → 24M9314+79#21530#21451
24M → 40K9117+74#21451#21377
40K → 25.2M512+49#21377#21328
25.2M → Finish2643-17#21328#21345
TOTALS9202794-1874
📊

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