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BOSTON MARATHON 2023

Keiko Sasakawa

Bib: 23677•F

NE

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Top 46%
Division (F60-64)
#0 / 527
Top 15%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
27:10
Rank: #19148
Start → 5K
27:10 | 8:45/mi
10K· 6.21 mi
53:38
Rank: #18697 (+451)
5K → 10K
26:28 | 8:31/mi
15K· 9.32 mi
1:20:44
Rank: #18822 (-125)
10K → 15K
27:06 | 8:43/mi
20K· 12.43 mi
1:47:51
Rank: #18690 (+132)
15K → 20K
27:07 | 8:44/mi
Half· 13.11 mi
1:53:41
Rank: #18648 (+42)
20K → Half
5:50 | 8:33/mi
25K· 15.53 mi
2:14:50
Rank: #18455 (+193)
Half → 25K
21:09 | 8:43/mi
30K· 18.64 mi
2:42:31
Rank: #18098 (+357)
25K → 30K
27:41 | 8:55/mi
20M
2:54:25
Rank: #17848 (+250)
30K → 20M
11:54 | 8:45/mi
21M
3:03:58
Rank: #17741 (+107)
20M → 21M
9:33 | 9:33/mi
35K· 21.75 mi
3:10:28
Rank: #17688 (+53)
21M → 35K
6:30 | 8:41/mi
23M
3:21:20
Rank: #17481 (+207)
35K → 23M
10:52 | 8:41/mi
24M
3:30:08
Rank: #17429 (+52)
23M → 24M
8:48 | 8:48/mi
40K· 24.85 mi
3:38:07
Rank: #17455 (-26)
24M → 40K
7:59 | 9:20/mi
25.2M
3:41:23
Rank: #17421 (+34)
40K → 25.2M
3:16 | 9:28/mi
Finish· 26.22 mi
3:49:50
Rank: #17305 (+116)
25.2M → Finish
8:27 | 8:18/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:53:41
Pace8:40 /mi
2nd Half
Distance13.11 mi
Time1:56:09
Pace8:52 /mi
📊Positive Split: 2.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:23:5527:108:4527:10
8:45
-
10K
6.21 mi11:50:2353:388:3826:28
8:31
-0:14
15K
9.32 mi12:17:291:20:448:4027:06
8:43
+0:12
20K
12.43 mi12:44:361:47:518:4127:07
8:44
+0:01
Half
13.11 mi12:50:261:53:418:405:50
8:33
-0:11
25K
15.53 mi13:11:352:14:508:4121:09
8:43
+0:10
30K
18.64 mi13:39:162:42:318:4327:41
8:55
+0:12
20M
20.00 mi13:51:102:54:258:4311:54
8:45
-0:10
21M
21.00 mi14:00:433:03:588:469:33
9:33
+0:48
35K
21.75 mi14:07:133:10:288:456:30
8:41
-0:52
23M
23.00 mi14:18:053:21:208:4510:52
8:41
0:00
24M
24.00 mi14:26:533:30:088:458:48
8:48
+0:07
40K
24.85 mi14:34:523:38:078:477:59
9:20
+0:32
25.2M
25.20 mi14:38:083:41:238:473:16
9:28
+0:08
Finish
26.22 mi14:46:353:49:508:468:27
8:18
-1:10

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

8:18 /mi

Average Pace

8:46 /mi

Slowest Pace

9:33 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:29:02

91% of race

Time at Steady Pace

20:48

9% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:46 /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 mi11:23:5527:108:4527:10
8:45
#19148
10K
6.21 mi11:50:2353:388:3826:28
8:31
#18697
15K
9.32 mi12:17:291:20:448:4027:06
8:43
#18822
20K
12.43 mi12:44:361:47:518:4127:07
8:44
#18690
Half
13.11 mi12:50:261:53:418:405:50
8:33
#18648
25K
15.53 mi13:11:352:14:508:4121:09
8:43
#18455
30K
18.64 mi13:39:162:42:318:4327:41
8:55
#18098
20M
20.00 mi13:51:102:54:258:4311:54
8:45
#17848
21M
21.00 mi14:00:433:03:588:469:33
9:33
#17741
35K
21.75 mi14:07:133:10:288:456:30
8:41
#17688
23M
23.00 mi14:18:053:21:208:4510:52
8:41
#17481
24M
24.00 mi14:26:533:30:088:458:48
8:48
#17429
40K
24.85 mi14:34:523:38:078:477:59
9:20
#17455
25.2M
25.20 mi14:38:083:41:238:473:16
9:28
#17421
Finish
26.22 mi14:46:353:49:508:468:27
8:18
#17305
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF60-64Seg. OverallSeg. FemalesSeg. F60-64
5K3.11 mi3.11 mi191487289728919100(Top 72%)7160(Top 63%)7160(Top 1359%)
10K6.21 mi3.10 mi18697+4516944+3456944+34518373(Top 69%)6703(Top 59%)6703(Top 1272%)
15K9.32 mi3.11 mi18822-1257020-767020-7619100(Top 72%)7160(Top 63%)7160(Top 1359%)
20K12.43 mi3.11 mi18690+1326927+936927+9318296(Top 69%)6669(Top 58%)6669(Top 1265%)
Half13.11 mi0.68 mi18648+426901+266901+2618027(Top 68%)6491(Top 57%)6491(Top 1232%)
25K15.53 mi2.42 mi18455+1936802+996802+9917503(Top 66%)6284(Top 55%)6284(Top 1192%)
30K18.64 mi3.11 mi18098+3576626+1766626+17616719(Top 63%)5904(Top 52%)5904(Top 1120%)
20M20.00 mi1.36 mi17848+2506489+1376489+13715223(Top 57%)5132(Top 45%)5132(Top 974%)
21M21.00 mi1.00 mi17741+1076434+556434+5516231(Top 61%)5759(Top 50%)5759(Top 1093%)
35K21.75 mi0.75 mi17688+536418+166418+1616379(Top 62%)5928(Top 52%)5928(Top 1125%)
23M23.00 mi1.25 mi17481+2076309+1096309+10914298(Top 54%)4798(Top 42%)4798(Top 910%)
24M24.00 mi1.00 mi17429+526284+256284+2516225(Top 61%)5938(Top 52%)5938(Top 1127%)
40K24.85 mi0.85 mi17455-266316-326316-3217701(Top 66%)6787(Top 59%)6787(Top 1288%)
25.2M25.20 mi0.35 mi17421+346304+126304+1215149(Top 57%)5403(Top 47%)5403(Top 1025%)
Finish26.22 mi1.02 mi17305+1166246+586246+5814104(Top 53%)4808(Top 42%)4808(Top 912%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 72%
×21stories
+97ft-345ft

Overall

19100

Females

7160

F60-64

7160

5K→10K

3.1 - 6.2 mi

Top 69%
×5stories
+79ft-138ft

Overall

18373

Females

6703

F60-64

6703

10K→15K

6.2 - 9.3 mi

Top 72%
×3stories
+67ft-78ft

Overall

19100

Females

7160

F60-64

7160

15K→20K

9.3 - 12.4 mi

Top 69%
×5stories
+106ft-86ft

Overall

18296

Females

6669

F60-64

6669

20K→Half

12.4 - 13.1 mi

Top 68%
×2stories
+19ft-37ft

Overall

18027

Females

6491

F60-64

6491

Half→25K

13.1 - 15.5 mi

Top 66%
×4stories
+66ft-88ft

Overall

17503

Females

6284

F60-64

6284

25K→30K

15.5 - 18.6 mi

Top 63%
×9stories
+181ft-148ft

Overall

16719

Females

5904

F60-64

5904

30K→20M

18.6 - 20.0 mi

Top 57%
×5stories
+64ft-50ft

Overall

15223

Females

5132

F60-64

5132

20M→21M

20.0 - 21.0 mi

Top 61%
×8stories
+106ft-24ft

Overall

16231

Females

5759

F60-64

5759

21M→35K

21.0 - 21.8 mi

Top 62%
×7stories
+17ft-86ft

Overall

16379

Females

5928

F60-64

5928

35K→23M

21.8 - 23.0 mi

Top 54%
×5stories
+23ft-63ft

Overall

14298

Females

4798

F60-64

4798

23M→24M

23.0 - 24.0 mi

Top 61%
×6stories
+12ft-82ft

Overall

16225

Females

5938

F60-64

5938

24M→40K

24.0 - 24.9 mi

Top 66%
×1story
+6ft-20ft

Overall

17701

Females

6787

F60-64

6787

40K→25.2M

24.9 - 25.2 mi

Top 57%
×1story
+13ft-16ft

Overall

15149

Females

5403

F60-64

5403

25.2M→Finish

25.2 - 26.2 mi

Top 53%
×2stories
+22ft-21ft

Overall

14104

Females

4808

F60-64

4808

Passing Analysis

Category:
Athletes Passed
2663
Passed By
820
Net Change
+1843
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#19148
5K → 10K637186+451#19148#18697
10K → 15K136261-125#18697#18822
15K → 20K21987+132#18822#18690
20K → Half5412+42#18690#18648
Half → 25K23138+193#18648#18455
25K → 30K40043+357#18455#18098
30K → 20M2544+250#18098#17848
20M → 21M13831+107#17848#17741
21M → 35K7320+53#17741#17688
35K → 23M21710+207#17688#17481
23M → 24M8028+52#17481#17429
24M → 40K4975-26#17429#17455
40K → 25.2M4713+34#17455#17421
25.2M → Finish12812+116#17421#17305
TOTALS2663820+1843
📊

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