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BOSTON MARATHON 2023

Masako Sasaki

Bib: 29682•F

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

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
30:09
Rank: #22677
Start → 5K
30:09 | 9:42/mi
10K· 6.21 mi
59:46
Rank: #22661 (+16)
5K → 10K
29:37 | 9:32/mi
15K· 9.32 mi
1:30:26
Rank: #22890 (-229)
10K → 15K
30:40 | 9:52/mi
20K· 12.43 mi
2:02:46
Rank: #23147 (-257)
15K → 20K
32:20 | 10:24/mi
Half· 13.11 mi
2:09:51
Rank: #23202 (-55)
20K → Half
7:05 | 10:23/mi
25K· 15.53 mi
2:35:53
Rank: #23284 (-82)
Half → 25K
26:02 | 10:44/mi
30K· 18.64 mi
3:10:48
Rank: #23318 (-34)
25K → 30K
34:55 | 11:14/mi
20M
3:26:00
Rank: #23287 (+31)
30K → 20M
15:12 | 11:11/mi
21M
3:38:28
Rank: #23304 (-17)
20M → 21M
12:28 | 12:28/mi
35K· 21.75 mi
3:46:35
Rank: #23293 (+11)
21M → 35K
8:07 | 10:51/mi
23M
4:00:49
Rank: #23261 (+32)
35K → 23M
14:14 | 11:22/mi
24M
4:11:36
Rank: #23256 (+5)
23M → 24M
10:47 | 10:47/mi
40K· 24.85 mi
4:21:00
Rank: #23212 (+44)
24M → 40K
9:24 | 11:00/mi
25.2M
4:25:04
Rank: #23195 (+17)
40K → 25.2M
4:04 | 11:48/mi
Finish· 26.22 mi
4:35:55
Rank: #23192 (+3)
25.2M → Finish
10:51 | 10:39/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:09:51
Pace9:54 /mi
2nd Half
Distance13.11 mi
Time2:26:04
Pace11:09 /mi
📊Positive Split: 12.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:47:3730:099:4230:09
9:42
-
10K
6.21 mi12:17:1459:469:3729:37
9:32
-0:10
15K
9.32 mi12:47:541:30:269:4230:40
9:52
+0:20
20K
12.43 mi13:20:142:02:469:5332:20
10:24
+0:32
Half
13.11 mi13:27:192:09:519:547:05
10:23
-0:01
25K
15.53 mi13:53:212:35:5310:0226:02
10:44
+0:21
30K
18.64 mi14:28:163:10:4810:1434:55
11:14
+0:30
20M
20.00 mi14:43:283:26:0010:1815:12
11:11
-0:03
21M
21.00 mi14:55:563:38:2810:2412:28
12:28
+1:17
35K
21.75 mi15:04:033:46:3510:258:07
10:51
-1:37
23M
23.00 mi15:18:174:00:4910:2814:14
11:22
+0:31
24M
24.00 mi15:29:044:11:3610:2910:47
10:47
-0:35
40K
24.85 mi15:38:284:21:0010:309:24
11:00
+0:13
25.2M
25.20 mi15:42:324:25:0410:314:04
11:48
+0:48
Finish
26.22 mi15:53:234:35:5510:3210:51
10:39
-1:09

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

9:32 /mi

Average Pace

10:32 /mi

Slowest Pace

12:28 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:09:51

47% of race

Time at Steady Pace

1:05:11

24% of race

Time at Slower Pace

1:20:53

29% of race

Average Pace: 10:31 /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 mi11:47:3730:099:4230:09
9:42
#22677
10K
6.21 mi12:17:1459:469:3729:37
9:32
#22661
15K
9.32 mi12:47:541:30:269:4230:40
9:52
#22890
20K
12.43 mi13:20:142:02:469:5332:20
10:24
#23147
Half
13.11 mi13:27:192:09:519:547:05
10:23
#23202
25K
15.53 mi13:53:212:35:5310:0226:02
10:44
#23284
30K
18.64 mi14:28:163:10:4810:1434:55
11:14
#23318
20M
20.00 mi14:43:283:26:0010:1815:12
11:11
#23287
21M
21.00 mi14:55:563:38:2810:2412:28
12:28
#23304
35K
21.75 mi15:04:033:46:3510:258:07
10:51
#23293
23M
23.00 mi15:18:174:00:4910:2814:14
11:22
#23261
24M
24.00 mi15:29:044:11:3610:2910:47
10:47
#23256
40K
24.85 mi15:38:284:21:0010:309:24
11:00
#23212
25.2M
25.20 mi15:42:324:25:0410:314:04
11:48
#23195
Finish
26.22 mi15:53:234:35:5510:3210:51
10:39
#23192
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF60-64Seg. OverallSeg. FemalesSeg. F60-64
5K3.11 mi3.11 mi226779224922423243(Top 87%)9469(Top 83%)9469(Top 1797%)
10K6.21 mi3.10 mi22661+169179+459179+4522617(Top 85%)9151(Top 80%)9151(Top 1736%)
15K9.32 mi3.11 mi22890-2299288-1099288-10923243(Top 87%)9469(Top 83%)9469(Top 1797%)
20K12.43 mi3.11 mi23147-2579431-1439431-14323673(Top 89%)9728(Top 85%)9728(Top 1846%)
Half13.11 mi0.68 mi23202-559457-269457-2623995(Top 90%)9907(Top 87%)9907(Top 1880%)
25K15.53 mi2.42 mi23284-829504-479504-4723573(Top 89%)9716(Top 85%)9716(Top 1844%)
30K18.64 mi3.11 mi23318-349549-459549-4523477(Top 88%)9722(Top 85%)9722(Top 1845%)
20M20.00 mi1.36 mi23287+319547+29547+223002(Top 86%)9514(Top 83%)9514(Top 1805%)
21M21.00 mi1.00 mi23304-179557-109557-1023419(Top 88%)9770(Top 86%)9770(Top 1854%)
35K21.75 mi0.75 mi23293+119560-39560-323030(Top 87%)9607(Top 84%)9607(Top 1823%)
23M23.00 mi1.25 mi23261+329557+39557+323017(Top 86%)9596(Top 84%)9596(Top 1821%)
24M24.00 mi1.00 mi23256+59559-29559-222640(Top 85%)9444(Top 83%)9444(Top 1792%)
40K24.85 mi0.85 mi23212+449549+109549+1022356(Top 84%)9325(Top 82%)9325(Top 1769%)
25.2M25.20 mi0.35 mi23195+179544+59544+522164(Top 83%)9223(Top 81%)9223(Top 1750%)
Finish26.22 mi1.02 mi23192+39546-29546-223329(Top 88%)9822(Top 86%)9822(Top 1864%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 87%
×21stories
+97ft-345ft

Overall

23243

Females

9469

F60-64

9469

5K→10K

3.1 - 6.2 mi

Top 85%
×5stories
+79ft-138ft

Overall

22617

Females

9151

F60-64

9151

10K→15K

6.2 - 9.3 mi

Top 87%
×3stories
+67ft-78ft

Overall

23243

Females

9469

F60-64

9469

15K→20K

9.3 - 12.4 mi

Top 89%
×5stories
+106ft-86ft

Overall

23673

Females

9728

F60-64

9728

20K→Half

12.4 - 13.1 mi

Top 90%
×2stories
+19ft-37ft

Overall

23995

Females

9907

F60-64

9907

Half→25K

13.1 - 15.5 mi

Top 89%
×4stories
+66ft-88ft

Overall

23573

Females

9716

F60-64

9716

25K→30K

15.5 - 18.6 mi

Top 88%
×9stories
+181ft-148ft

Overall

23477

Females

9722

F60-64

9722

30K→20M

18.6 - 20.0 mi

Top 86%
×5stories
+64ft-50ft

Overall

23002

Females

9514

F60-64

9514

20M→21M

20.0 - 21.0 mi

Top 88%
×8stories
+106ft-24ft

Overall

23419

Females

9770

F60-64

9770

21M→35K

21.0 - 21.8 mi

Top 87%
×7stories
+17ft-86ft

Overall

23030

Females

9607

F60-64

9607

35K→23M

21.8 - 23.0 mi

Top 86%
×5stories
+23ft-63ft

Overall

23017

Females

9596

F60-64

9596

23M→24M

23.0 - 24.0 mi

Top 85%
×6stories
+12ft-82ft

Overall

22640

Females

9444

F60-64

9444

24M→40K

24.0 - 24.9 mi

Top 84%
×1story
+6ft-20ft

Overall

22356

Females

9325

F60-64

9325

40K→25.2M

24.9 - 25.2 mi

Top 83%
×1story
+13ft-16ft

Overall

22164

Females

9223

F60-64

9223

25.2M→Finish

25.2 - 26.2 mi

Top 88%
×2stories
+22ft-21ft

Overall

23329

Females

9822

F60-64

9822

Passing Analysis

Category:
Athletes Passed
922
Passed By
1437
Net Change
-515
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#22677
5K → 10K248232+16#22677#22661
10K → 15K72301-229#22661#22890
15K → 20K64321-257#22890#23147
20K → Half964-55#23147#23202
Half → 25K74156-82#23202#23284
25K → 30K107141-34#23284#23318
30K → 20M7039+31#23318#23287
20M → 21M3350-17#23287#23304
21M → 35K3221+11#23304#23293
35K → 23M5927+32#23293#23261
23M → 24M3429+5#23261#23256
24M → 40K6218+44#23256#23212
40K → 25.2M3013+17#23212#23195
25.2M → Finish2825+3#23195#23192
TOTALS9221437-515
📊

Passing Visuals

Category:

📈Position Graph

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🎨Heatmap Timeline

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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