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BOSTON MARATHON 2023

Masahiro Nagano

Bib: 23418•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
Top 25%
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
8:14/mi
25:35
↑ 97↓ 3451.5%
10K· 6.21 mi
8:04/mi
50:40
↑ 79↓ 1380.4%
15K· 9.32 mi
8:15/mi
1:16:17
↑ 67↓ 78
20K· 12.43 mi
8:25/mi
1:42:26
↑ 106↓ 860.1%
Half· 13.11 mi
8:23/mi
1:48:09
↑ 19↓ 370.5%
25K· 15.53 mi
8:25/mi
2:08:34
↑ 66↓ 880.2%
30K· 18.64 mi
8:51/mi
2:36:03
↑ 181↓ 1480.2%
20M
9:01/mi
2:48:18
↑ 64↓ 500.2%
21M
9:46/mi
2:58:04
↑ 106↓ 241.6%
35K· 21.75 mi
8:57/mi
3:04:46
↑ 17↓ 861.7%
23M
9:22/mi
3:16:30
↑ 23↓ 630.6%
24M
9:32/mi
3:26:02
↓ 821.3%
40K· 24.85 mi
10:39/mi
3:35:08
↓ 200.3%
25.2M
12:25/mi
3:39:25
↑ 13↓ 160.2%
Finish· 26.22 mi
10:38/mi
3:50:15
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:48:09
Pace8:15 /mi
2nd Half
Distance13.11 mi
Time2:02:06
Pace9:19 /mi
📊Positive Split: 12.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:20:3925:358:1425:35
8:14
-
10K
6.21 mi11:45:4450:408:0925:05
8:04
-0:10
15K
9.32 mi12:11:211:16:178:1125:37
8:15
+0:11
20K
12.43 mi12:37:301:42:268:1526:09
8:25
+0:10
Half
13.11 mi12:43:131:48:098:155:43
8:23
-0:02
25K
15.53 mi13:03:382:08:348:1720:25
8:25
+0:02
30K
18.64 mi13:31:072:36:038:2227:29
8:51
+0:26
20M
20.00 mi13:43:222:48:188:2512:15
9:01
+0:10
21M
21.00 mi13:53:082:58:048:299:46
9:46
+0:45
35K
21.75 mi13:59:503:04:468:306:42
8:57
-0:49
23M
23.00 mi14:11:343:16:308:3311:44
9:22
+0:25
24M
24.00 mi14:21:063:26:028:359:32
9:32
+0:10
40K
24.85 mi14:30:123:35:088:399:06
10:39
+1:07
25.2M
25.20 mi14:34:293:39:258:424:17
12:25
+1:46
Finish
26.22 mi14:45:193:50:158:4710:50
10:38
-1:47

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

8:04 /mi

Average Pace

8:47 /mi

Slowest Pace

12:25 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:16:17

33% of race

Time at Steady Pace

1:50:27

48% of race

Time at Slower Pace

43:31

19% of race

Average Pace: 8:47 /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 mi11:20:3925:358:1425:35
8:14
#15684
10K
6.21 mi11:45:4450:408:0925:05
8:04
#15485
15K
9.32 mi12:11:211:16:178:1125:37
8:15
#15705
20K
12.43 mi12:37:301:42:268:1526:09
8:25
#15871
Half
13.11 mi12:43:131:48:098:155:43
8:23
#15907
25K
15.53 mi13:03:382:08:348:1720:25
8:25
#15868
30K
18.64 mi13:31:072:36:038:2227:29
8:51
#15945
20M
20.00 mi13:43:222:48:188:2512:15
9:01
#16002
21M
21.00 mi13:53:082:58:048:299:46
9:46
#16050
35K
21.75 mi13:59:503:04:468:306:42
8:57
#16110
23M
23.00 mi14:11:343:16:308:3311:44
9:22
#16225
24M
24.00 mi14:21:063:26:028:359:32
9:32
#16417
40K
24.85 mi14:30:123:35:088:399:06
10:39
#16744
25.2M
25.20 mi14:34:293:39:258:424:17
12:25
#16949
Finish
26.22 mi14:45:193:50:158:4710:50
10:38
#17393
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM65-69Seg. OverallSeg. MalesSeg. M65-69
5K3.11 mi3.11 mi15684105801058016175(Top 61%)10760(Top 71%)10760(Top 1960%)
10K6.21 mi3.10 mi15485+19910506+7410506+7415323(Top 58%)10440(Top 69%)10440(Top 1902%)
15K9.32 mi3.11 mi15705-22010586-8010586-8016175(Top 61%)10760(Top 71%)10760(Top 1960%)
20K12.43 mi3.11 mi15871-16610626-4010626-4016341(Top 61%)10770(Top 71%)10770(Top 1962%)
Half13.11 mi0.68 mi15907-3610641-1510641-1516976(Top 64%)11074(Top 73%)11074(Top 2017%)
25K15.53 mi2.42 mi15868+3910596+4510596+4515715(Top 59%)10429(Top 69%)10429(Top 1900%)
30K18.64 mi3.11 mi15945-7710587+910587+916349(Top 61%)10634(Top 70%)10634(Top 1937%)
20M20.00 mi1.36 mi16002-5710590-310590-316611(Top 62%)10669(Top 70%)10669(Top 1943%)
21M21.00 mi1.00 mi16050-4810585+510585+517105(Top 64%)10835(Top 71%)10835(Top 1974%)
35K21.75 mi0.75 mi16110-6010587-210587-217706(Top 67%)11014(Top 73%)11014(Top 2006%)
23M23.00 mi1.25 mi16225-11510634-4710634-4717802(Top 67%)11030(Top 73%)11030(Top 2009%)
24M24.00 mi1.00 mi16417-19210695-6110695-6119308(Top 73%)11663(Top 77%)11663(Top 2124%)
40K24.85 mi0.85 mi16744-32710818-12310818-12321549(Top 81%)12612(Top 83%)12612(Top 2297%)
25.2M25.20 mi0.35 mi16949-20510885-6710885-6723130(Top 87%)13370(Top 88%)13370(Top 2435%)
Finish26.22 mi1.02 mi17393-44411070-18511070-18523271(Top 87%)13459(Top 89%)13459(Top 2452%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 61%
×21story building
+97ft-345ft

Overall

16175

Males

10760

M65-69

10760

5K→10K

3.1 - 6.2 mi

Top 58%
×5story building
+79ft-138ft

Overall

15323

Males

10440

M65-69

10440

10K→15K

6.2 - 9.3 mi

Top 61%
×3story building
+67ft-78ft

Overall

16175

Males

10760

M65-69

10760

15K→20K

9.3 - 12.4 mi

Top 61%
×5story building
+106ft-86ft

Overall

16341

Males

10770

M65-69

10770

20K→Half

12.4 - 13.1 mi

Top 64%
×2story building
+19ft-37ft

Overall

16976

Males

11074

M65-69

11074

Half→25K

13.1 - 15.5 mi

Top 59%
×4story building
+66ft-88ft

Overall

15715

Males

10429

M65-69

10429

25K→30K

15.5 - 18.6 mi

Top 61%
×9story building
+181ft-148ft

Overall

16349

Males

10634

M65-69

10634

30K→20M

18.6 - 20.0 mi

Top 62%
×5story building
+64ft-50ft

Overall

16611

Males

10669

M65-69

10669

20M→21M

20.0 - 21.0 mi

Top 64%
×8story building
+106ft-24ft

Overall

17105

Males

10835

M65-69

10835

21M→35K

21.0 - 21.8 mi

Top 67%
×7story building
+17ft-86ft

Overall

17706

Males

11014

M65-69

11014

35K→23M

21.8 - 23.0 mi

Top 67%
×5story building
+23ft-63ft

Overall

17802

Males

11030

M65-69

11030

23M→24M

23.0 - 24.0 mi

Top 73%
×6story building
+12ft-82ft

Overall

19308

Males

11663

M65-69

11663

24M→40K

24.0 - 24.9 mi

Top 81%
×1story
+6ft-20ft

Overall

21549

Males

12612

M65-69

12612

40K→25.2M

24.9 - 25.2 mi

Top 87%
×1story
+13ft-16ft

Overall

23130

Males

13370

M65-69

13370

25.2M→Finish

25.2 - 26.2 mi

Top 87%
×2story building
+22ft-21ft

Overall

23271

Males

13459

M65-69

13459

Passing Analysis

Category:
Athletes Passed
1221
Passed By
2930
Net Change
-1709
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#15684
5K → 10K399200+199#15684#15485
10K → 15K109329-220#15485#15705
15K → 20K121287-166#15705#15871
20K → Half1753-36#15871#15907
Half → 25K152113+39#15907#15868
25K → 30K156233-77#15868#15945
30K → 20M70127-57#15945#16002
20M → 21M70118-48#16002#16050
21M → 35K3595-60#16050#16110
35K → 23M46161-115#16110#16225
23M → 24M25217-192#16225#16417
24M → 40K9336-327#16417#16744
40K → 25.2M4209-205#16744#16949
25.2M → Finish8452-444#16949#17393
TOTALS12212930-1709
📊

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