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BOSTON MARATHON 2023

Kenji Niwa

Bib: 29502•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M60-64)
#0 / 1110
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
10:05/mi
31:19
↑ 97↓ 3451.5%
10K· 6.21 mi
10:22/mi
1:03:33
↑ 79↓ 1380.4%
15K· 9.32 mi
11:31/mi
1:39:19
↑ 67↓ 78
20K· 12.43 mi
11:28/mi
2:14:56
↑ 106↓ 860.1%
Half· 13.11 mi
10:38/mi
2:22:11
↑ 19↓ 370.5%
25K· 15.53 mi
11:15/mi
2:49:28
↑ 66↓ 880.2%
30K· 18.64 mi
11:47/mi
3:26:03
↑ 181↓ 1480.2%
20M
13:15/mi
3:44:03
↑ 64↓ 500.2%
21M
13:16/mi
3:57:19
↑ 106↓ 241.6%
35K· 21.75 mi
11:06/mi
4:05:37
↑ 17↓ 861.7%
23M
11:43/mi
4:20:17
↑ 23↓ 630.6%
24M
11:51/mi
4:32:08
↓ 821.3%
40K· 24.85 mi
11:32/mi
4:42:00
↓ 200.3%
25.2M
12:17/mi
4:46:14
↑ 13↓ 160.2%
Finish· 26.22 mi
10:49/mi
4:57:15
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:22:11
Pace10:51 /mi
2nd Half
Distance13.11 mi
Time2:35:04
Pace11:50 /mi
📊Positive Split: 9.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:48:4931:1910:0531:19
10:05
-
10K
6.21 mi12:21:031:03:3310:1432:14
10:22
+0:17
15K
9.32 mi12:56:491:39:1910:3935:46
11:31
+1:09
20K
12.43 mi13:32:262:14:5610:5135:37
11:28
-0:03
Half
13.11 mi13:39:412:22:1110:517:15
10:38
-0:50
25K
15.53 mi14:06:582:49:2810:5527:17
11:15
+0:37
30K
18.64 mi14:43:333:26:0311:0336:35
11:47
+0:32
20M
20.00 mi15:01:333:44:0311:1218:00
13:15
+1:28
21M
21.00 mi15:14:493:57:1911:1813:16
13:16
+0:01
35K
21.75 mi15:23:074:05:3711:188:18
11:06
-2:10
23M
23.00 mi15:37:474:20:1711:1914:40
11:43
+0:37
24M
24.00 mi15:49:384:32:0811:2011:51
11:51
+0:08
40K
24.85 mi15:59:304:42:0011:219:52
11:32
-0:19
25.2M
25.20 mi16:03:444:46:1411:224:14
12:17
+0:45
Finish
26.22 mi16:14:454:57:1511:2111:01
10:49
-1:28

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

10:05 /mi

Average Pace

11:21 /mi

Slowest Pace

13:16 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:21:49

28% of race

Time at Steady Pace

2:59:56

61% of race

Time at Slower Pace

35:30

12% of race

Average Pace: 11:20 /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 mi11:48:4931:1910:0531:19
10:05
#23630
10K
6.21 mi12:21:031:03:3310:1432:14
10:22
#24123
15K
9.32 mi12:56:491:39:1910:3935:46
11:31
#24905
20K
12.43 mi13:32:262:14:5610:5135:37
11:28
#25006
Half
13.11 mi13:39:412:22:1110:517:15
10:38
#24970
25K
15.53 mi14:06:582:49:2810:5527:17
11:15
#24873
30K
18.64 mi14:43:333:26:0311:0336:35
11:47
#24757
20M
20.00 mi15:01:333:44:0311:1218:00
13:15
#24836
21M
21.00 mi15:14:493:57:1911:1813:16
13:16
#24819
35K
21.75 mi15:23:074:05:3711:188:18
11:06
#24787
23M
23.00 mi15:37:474:20:1711:1914:40
11:43
#24738
24M
24.00 mi15:49:384:32:0811:2011:51
11:51
#24726
40K
24.85 mi15:59:304:42:0011:219:52
11:32
#24674
25.2M
25.20 mi16:03:444:46:1411:224:14
12:17
#24656
Finish
26.22 mi16:14:454:57:1511:2111:01
10:49
#24645
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM60-64Seg. OverallSeg. MalesSeg. M60-64
5K3.11 mi3.11 mi23630138931389325719(Top 97%)14822(Top 98%)14822(Top 1335%)
10K6.21 mi3.10 mi24123-49314143-25014143-25024443(Top 92%)14283(Top 94%)14283(Top 1287%)
15K9.32 mi3.11 mi24905-78214496-35314496-35325719(Top 97%)14822(Top 98%)14822(Top 1335%)
20K12.43 mi3.11 mi25006-10114527-3114527-3125198(Top 95%)14577(Top 96%)14577(Top 1313%)
Half13.11 mi0.68 mi24970+3614508+1914508+1924414(Top 92%)14234(Top 94%)14234(Top 1282%)
25K15.53 mi2.42 mi24873+9714454+5414454+5424338(Top 91%)14182(Top 93%)14182(Top 1278%)
30K18.64 mi3.11 mi24757+11614388+6614388+6624226(Top 91%)14065(Top 93%)14065(Top 1267%)
20M20.00 mi1.36 mi24836-7914407-1914407-1925353(Top 95%)14551(Top 96%)14551(Top 1311%)
21M21.00 mi1.00 mi24819+1714402+514402+524359(Top 91%)14062(Top 93%)14062(Top 1267%)
35K21.75 mi0.75 mi24787+3214379+2314379+2323460(Top 88%)13592(Top 90%)13592(Top 1225%)
23M23.00 mi1.25 mi24738+4914346+3314346+3323594(Top 89%)13671(Top 90%)13671(Top 1232%)
24M24.00 mi1.00 mi24726+1214332+1414332+1424332(Top 91%)13969(Top 92%)13969(Top 1258%)
40K24.85 mi0.85 mi24674+5214299+3314299+3323268(Top 87%)13440(Top 89%)13440(Top 1211%)
25.2M25.20 mi0.35 mi24656+1814292+714292+722937(Top 86%)13295(Top 88%)13295(Top 1198%)
Finish26.22 mi1.02 mi24645+1114286+614286+623628(Top 89%)13639(Top 90%)13639(Top 1229%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 97%
×21story building
+97ft-345ft

Overall

25719

Males

14822

M60-64

14822

5K→10K

3.1 - 6.2 mi

Top 92%
×5story building
+79ft-138ft

Overall

24443

Males

14283

M60-64

14283

10K→15K

6.2 - 9.3 mi

Top 97%
×3story building
+67ft-78ft

Overall

25719

Males

14822

M60-64

14822

15K→20K

9.3 - 12.4 mi

Top 95%
×5story building
+106ft-86ft

Overall

25198

Males

14577

M60-64

14577

20K→Half

12.4 - 13.1 mi

Top 92%
×2story building
+19ft-37ft

Overall

24414

Males

14234

M60-64

14234

Half→25K

13.1 - 15.5 mi

Top 91%
×4story building
+66ft-88ft

Overall

24338

Males

14182

M60-64

14182

25K→30K

15.5 - 18.6 mi

Top 91%
×9story building
+181ft-148ft

Overall

24226

Males

14065

M60-64

14065

30K→20M

18.6 - 20.0 mi

Top 95%
×5story building
+64ft-50ft

Overall

25353

Males

14551

M60-64

14551

20M→21M

20.0 - 21.0 mi

Top 91%
×8story building
+106ft-24ft

Overall

24359

Males

14062

M60-64

14062

21M→35K

21.0 - 21.8 mi

Top 88%
×7story building
+17ft-86ft

Overall

23460

Males

13592

M60-64

13592

35K→23M

21.8 - 23.0 mi

Top 89%
×5story building
+23ft-63ft

Overall

23594

Males

13671

M60-64

13671

23M→24M

23.0 - 24.0 mi

Top 91%
×6story building
+12ft-82ft

Overall

24332

Males

13969

M60-64

13969

24M→40K

24.0 - 24.9 mi

Top 87%
×1story
+6ft-20ft

Overall

23268

Males

13440

M60-64

13440

40K→25.2M

24.9 - 25.2 mi

Top 86%
×1story
+13ft-16ft

Overall

22937

Males

13295

M60-64

13295

25.2M→Finish

25.2 - 26.2 mi

Top 89%
×2story building
+22ft-21ft

Overall

23628

Males

13639

M60-64

13639

Passing Analysis

Category:
Athletes Passed
742
Passed By
1757
Net Change
-1015
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#23630
5K → 10K43536-493#23630#24123
10K → 15K10792-782#24123#24905
15K → 20K66167-101#24905#25006
20K → Half404+36#25006#24970
Half → 25K12528+97#24970#24873
25K → 30K15135+116#24873#24757
30K → 20M27106-79#24757#24836
20M → 21M3619+17#24836#24819
21M → 35K364+32#24819#24787
35K → 23M6617+49#24787#24738
23M → 24M2816+12#24738#24726
24M → 40K575+52#24726#24674
40K → 25.2M224+18#24674#24656
25.2M → Finish3524+11#24656#24645
TOTALS7421757-1015
📊

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