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BOSTON MARATHON 2023

Nami Kato

Bib: 17873•F

CA

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 45%
Gender (Female)
#0 / 11423
Top 28%
Masters (Masters Women)
#0 / 6539
Top 15%
Division (F40-44)
#0 / 1878
Top 28%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
25:10
Rank: #14718
Start → 5K
25:10 | 8:06/mi
10K· 6.21 mi
50:56
Rank: #15803 (-1085)
5K → 10K
25:46 | 8:18/mi
15K· 9.32 mi
1:15:37
Rank: #15200 (+603)
10K → 15K
24:41 | 7:57/mi
20K· 12.43 mi
1:40:36
Rank: #14825 (+375)
15K → 20K
24:59 | 8:02/mi
Half· 13.11 mi
1:46:00
Rank: #14776 (+49)
20K → Half
5:24 | 7:55/mi
25K· 15.53 mi
2:05:20
Rank: #14414 (+362)
Half → 25K
19:20 | 7:58/mi
30K· 18.64 mi
2:30:11
Rank: #13745 (+669)
25K → 30K
24:51 | 8:00/mi
20M
2:40:54
Rank: #13378 (+367)
30K → 20M
10:43 | 7:53/mi
21M
2:49:03
Rank: #13057 (+321)
20M → 21M
8:09 | 8:09/mi
35K· 21.75 mi
2:54:52
Rank: #12952 (+105)
21M → 35K
5:49 | 7:46/mi
23M
3:04:45
Rank: #12701 (+251)
35K → 23M
9:53 | 7:54/mi
24M
3:12:25
Rank: #12509 (+192)
23M → 24M
7:40 | 7:40/mi
40K· 24.85 mi
3:19:01
Rank: #12341 (+168)
24M → 40K
6:36 | 7:43/mi
25.2M
3:21:50
Rank: #12259 (+82)
40K → 25.2M
2:49 | 8:10/mi
Finish· 26.22 mi
3:29:23
Rank: #12072 (+187)
25.2M → Finish
7:33 | 7:25/mi

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time1:46:00
Pace8:05 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:43:23
Pace7:53 /mi
📊Negative Split: 2.5% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:16:0225:108:0625:10
8:06
-
10K
6.21 mi11:41:4850:568:1225:46
8:18
+0:12
15K
9.32 mi12:06:291:15:378:0724:41
7:57
-0:21
20K
12.43 mi12:31:281:40:368:0624:59
8:02
+0:05
Half
13.11 mi12:36:521:46:008:055:24
7:55
-0:07
25K
15.53 mi12:56:122:05:208:0419:20
7:58
+0:03
30K
18.64 mi13:21:032:30:118:0324:51
8:00
+0:02
20M
20.00 mi13:31:462:40:548:0310:43
7:53
-0:07
21M
21.00 mi13:39:552:49:038:038:09
8:09
+0:16
35K
21.75 mi13:45:442:54:528:025:49
7:46
-0:23
23M
23.00 mi13:55:373:04:458:029:53
7:54
+0:08
24M
24.00 mi14:03:173:12:258:017:40
7:40
-0:14
40K
24.85 mi14:09:533:19:018:006:36
7:43
+0:03
25.2M
25.20 mi14:12:423:21:508:012:49
8:10
+0:27
Finish
26.22 mi14:20:153:29:238:007:33
7:25
-0:45

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

7:25 /mi

Average Pace

8:00 /mi

Slowest Pace

8:18 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:00:48

86% of race

Time at Steady Pace

28:35

14% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:59 /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 mi11:16:0225:108:0625:10
8:06
#14718
10K
6.21 mi11:41:4850:568:1225:46
8:18
#15803
15K
9.32 mi12:06:291:15:378:0724:41
7:57
#15200
20K
12.43 mi12:31:281:40:368:0624:59
8:02
#14825
Half
13.11 mi12:36:521:46:008:055:24
7:55
#14776
25K
15.53 mi12:56:122:05:208:0419:20
7:58
#14414
30K
18.64 mi13:21:032:30:118:0324:51
8:00
#13745
20M
20.00 mi13:31:462:40:548:0310:43
7:53
#13378
21M
21.00 mi13:39:552:49:038:038:09
8:09
#13057
35K
21.75 mi13:45:442:54:528:025:49
7:46
#12952
23M
23.00 mi13:55:373:04:458:029:53
7:54
#12701
24M
24.00 mi14:03:173:12:258:017:40
7:40
#12509
40K
24.85 mi14:09:533:19:018:006:36
7:43
#12341
25.2M
25.20 mi14:12:423:21:508:012:49
8:10
#12259
Finish
26.22 mi14:20:153:29:238:007:33
7:25
#12072
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi147184463446313954(Top 52%)4053(Top 35%)4053(Top 216%)
10K6.21 mi3.10 mi15803-10855157-6945157-69416884(Top 63%)5797(Top 51%)5797(Top 309%)
15K9.32 mi3.11 mi15200+6034781+3764781+37613954(Top 52%)4053(Top 35%)4053(Top 216%)
20K12.43 mi3.11 mi14825+3754569+2124569+21213766(Top 52%)3970(Top 35%)3970(Top 211%)
Half13.11 mi0.68 mi14776+494541+284541+2813707(Top 51%)3894(Top 34%)3894(Top 207%)
25K15.53 mi2.42 mi14414+3624353+1884353+18812536(Top 47%)3376(Top 30%)3376(Top 180%)
30K18.64 mi3.11 mi13745+6693987+3663987+36610923(Top 41%)2600(Top 23%)2600(Top 138%)
20M20.00 mi1.36 mi13378+3673785+2023785+2029505(Top 36%)2031(Top 18%)2031(Top 108%)
21M21.00 mi1.00 mi13057+3213616+1693616+1698356(Top 31%)1682(Top 15%)1682(Top 90%)
35K21.75 mi0.75 mi12952+1053581+353581+3510540(Top 40%)2640(Top 23%)2640(Top 141%)
23M23.00 mi1.25 mi12701+2513451+1303451+1309083(Top 34%)2085(Top 18%)2085(Top 111%)
24M24.00 mi1.00 mi12509+1923358+933358+938904(Top 33%)2066(Top 18%)2066(Top 110%)
40K24.85 mi0.85 mi12341+1683279+793279+798153(Top 31%)1817(Top 16%)1817(Top 97%)
25.2M25.20 mi0.35 mi12259+823248+313248+317626(Top 29%)1696(Top 15%)1696(Top 90%)
Finish26.22 mi1.02 mi12072+1873168+803168+807894(Top 30%)1793(Top 16%)1793(Top 95%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 52%
×21stories
+97ft-345ft

Overall

13954

Females

4053

F40-44

4053

5K→10K

3.1 - 6.2 mi

Top 63%
×5stories
+79ft-138ft

Overall

16884

Females

5797

F40-44

5797

10K→15K

6.2 - 9.3 mi

Top 52%
×3stories
+67ft-78ft

Overall

13954

Females

4053

F40-44

4053

15K→20K

9.3 - 12.4 mi

Top 52%
×5stories
+106ft-86ft

Overall

13766

Females

3970

F40-44

3970

20K→Half

12.4 - 13.1 mi

Top 51%
×2stories
+19ft-37ft

Overall

13707

Females

3894

F40-44

3894

Half→25K

13.1 - 15.5 mi

Top 47%
×4stories
+66ft-88ft

Overall

12536

Females

3376

F40-44

3376

25K→30K

15.5 - 18.6 mi

Top 41%
×9stories
+181ft-148ft

Overall

10923

Females

2600

F40-44

2600

30K→20M

18.6 - 20.0 mi

Top 36%
×5stories
+64ft-50ft

Overall

9505

Females

2031

F40-44

2031

20M→21M

20.0 - 21.0 mi

Top 31%
×8stories
+106ft-24ft

Overall

8356

Females

1682

F40-44

1682

21M→35K

21.0 - 21.8 mi

Top 40%
×7stories
+17ft-86ft

Overall

10540

Females

2640

F40-44

2640

35K→23M

21.8 - 23.0 mi

Top 34%
×5stories
+23ft-63ft

Overall

9083

Females

2085

F40-44

2085

23M→24M

23.0 - 24.0 mi

Top 33%
×6stories
+12ft-82ft

Overall

8904

Females

2066

F40-44

2066

24M→40K

24.0 - 24.9 mi

Top 31%
×1story
+6ft-20ft

Overall

8153

Females

1817

F40-44

1817

40K→25.2M

24.9 - 25.2 mi

Top 29%
×1story
+13ft-16ft

Overall

7626

Females

1696

F40-44

1696

25.2M→Finish

25.2 - 26.2 mi

Top 30%
×2stories
+22ft-21ft

Overall

7894

Females

1793

F40-44

1793

Passing Analysis

Category:
Athletes Passed
3903
Passed By
1257
Net Change
+2646
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#14718
5K → 10K471132-1085#14718#15803
10K → 15K62320+603#15803#15200
15K → 20K41035+375#15200#14825
20K → Half5910+49#14825#14776
Half → 25K37715+362#14776#14414
25K → 30K6734+669#14414#13745
30K → 20M3703+367#13745#13378
20M → 21M3210+321#13378#13057
21M → 35K1127+105#13057#12952
35K → 23M2587+251#12952#12701
23M → 24M1986+192#12701#12509
24M → 40K1768+168#12509#12341
40K → 25.2M842+82#12341#12259
25.2M → Finish1958+187#12259#12072
TOTALS39031257+2646
📊

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