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BOSTON MARATHON 2023

Chiemi Muroi

WI

Bib: 20316 F

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Division (F50-54)
#0 / 1207
Top 49%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
469 ft elev
5K· 3.11 mi
8:40/mi
26:55
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
8:38/mi
53:43
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
8:35/mi
1:20:22
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
8:41/mi
1:47:21
↑ 106↓ 860.1%
165 ft elev
Half· 13.11 mi
8:37/mi
1:53:14
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
8:43/mi
2:14:21
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
9:06/mi
2:42:37
↑ 181↓ 1480.2%
138 ft elev
20M
9:18/mi
2:55:15
↑ 64↓ 500.2%
148 ft elev
21M
10:05/mi
3:05:20
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
9:23/mi
3:12:21
↑ 17↓ 861.7%
156 ft elev
23M
9:36/mi
3:24:22
↑ 23↓ 630.6%
116 ft elev
24M
8:58/mi
3:33:20
↓ 821.3%
34 ft elev
40K· 24.85 mi
9:07/mi
3:41:08
↓ 200.3%
20 ft elev
25.2M
9:49/mi
3:44:31
↑ 13↓ 160.2%
18 ft elev
Finish· 26.22 mi
9:03/mi
3:53:44
↑ 22↓ 21
17 ft elev
Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:53:14
Pace8:38 /mi
2nd Half
Distance13.11 mi
Time2:00:30
Pace9:12 /mi
📊Positive Split: 6.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:19:2126:558:4026:55
8:40
-
10K
6.21 mi11:46:0953:438:3926:48
8:38
-0:02
15K
9.32 mi12:12:481:20:228:3726:39
8:35
-0:03
20K
12.43 mi12:39:471:47:218:3826:59
8:41
+0:06
Half
13.11 mi12:45:401:53:148:385:53
8:37
-0:04
25K
15.53 mi13:06:472:14:218:3921:07
8:43
+0:06
30K
18.64 mi13:35:032:42:378:4328:16
9:06
+0:23
20M
20.00 mi13:47:412:55:158:4612:38
9:18
+0:12
21M
21.00 mi13:57:463:05:208:5010:05
10:05
+0:47
35K
21.75 mi14:04:473:12:218:517:01
9:23
-0:42
23M
23.00 mi14:16:483:24:228:5312:01
9:36
+0:13
24M
24.00 mi14:25:463:33:208:538:58
8:58
-0:38
40K
24.85 mi14:33:343:41:088:547:48
9:07
+0:09
25.2M
25.20 mi14:36:573:44:318:553:23
9:49
+0:42
Finish
26.22 mi14:46:103:53:448:559:13
9:03
-0:46

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

8:35 /mi

Average Pace

8:55 /mi

Slowest Pace

10:05 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:28:15

89% of race

Time at Steady Pace

25:29

11% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:55 /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 mi11:19:2126:558:4026:55
8:40
#18664
10K
6.21 mi11:46:0953:438:3926:48
8:38
#18775
15K
9.32 mi12:12:481:20:228:3726:39
8:35
#18609
20K
12.43 mi12:39:471:47:218:3826:59
8:41
#18445
Half
13.11 mi12:45:401:53:148:385:53
8:37
#18433
25K
15.53 mi13:06:472:14:218:3921:07
8:43
#18261
30K
18.64 mi13:35:032:42:378:4328:16
9:06
#18127
20M
20.00 mi13:47:412:55:158:4612:38
9:18
#18113
21M
21.00 mi13:57:463:05:208:5010:05
10:05
#18119
35K
21.75 mi14:04:473:12:218:517:01
9:23
#18195
23M
23.00 mi14:16:483:24:228:5312:01
9:36
#18233
24M
24.00 mi14:25:463:33:208:538:58
8:58
#18187
40K
24.85 mi14:33:343:41:088:547:48
9:07
#18138
25.2M
25.20 mi14:36:573:44:318:553:23
9:49
#18123
Finish
26.22 mi14:46:103:53:448:559:13
9:03
#18132
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi186646976697618311(Top 69%)6682(Top 58%)6682(Top 554%)
10K6.21 mi3.10 mi18775-1116994-186994-1818990(Top 71%)7075(Top 62%)7075(Top 586%)
15K9.32 mi3.11 mi18609+1666888+1066888+10618311(Top 69%)6682(Top 58%)6682(Top 554%)
20K12.43 mi3.11 mi18445+1646775+1136775+11318035(Top 68%)6531(Top 57%)6531(Top 541%)
Half13.11 mi0.68 mi18433+126766+96766+918510(Top 70%)6787(Top 59%)6787(Top 562%)
25K15.53 mi2.42 mi18261+1726686+806686+8017438(Top 66%)6249(Top 55%)6249(Top 518%)
30K18.64 mi3.11 mi18127+1346647+396647+3917688(Top 66%)6459(Top 57%)6459(Top 535%)
20M20.00 mi1.36 mi18113+146649-26649-218020(Top 68%)6753(Top 59%)6753(Top 559%)
21M21.00 mi1.00 mi18119-66669-206669-2018337(Top 69%)6956(Top 61%)6956(Top 576%)
35K21.75 mi0.75 mi18195-766721-526721-5219455(Top 73%)7628(Top 67%)7628(Top 632%)
23M23.00 mi1.25 mi18233-386747-266747-2618733(Top 70%)7256(Top 64%)7256(Top 601%)
24M24.00 mi1.00 mi18187+466736+116736+1117102(Top 64%)6419(Top 56%)6419(Top 532%)
40K24.85 mi0.85 mi18138+496719+176719+1716756(Top 63%)6268(Top 55%)6268(Top 519%)
25.2M25.20 mi0.35 mi18123+156714+56714+516660(Top 63%)6249(Top 55%)6249(Top 518%)
Finish26.22 mi1.02 mi18132-96729-156729-1518200(Top 68%)7007(Top 61%)7007(Top 581%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 69%
×21story building
+97ft-345ft

Overall

18311

Females

6682

F50-54

6682

5K→10K

3.1 - 6.2 mi

Top 71%
×5story building
+79ft-138ft

Overall

18990

Females

7075

F50-54

7075

10K→15K

6.2 - 9.3 mi

Top 69%
×3story building
+67ft-78ft

Overall

18311

Females

6682

F50-54

6682

15K→20K

9.3 - 12.4 mi

Top 68%
×5story building
+106ft-86ft

Overall

18035

Females

6531

F50-54

6531

20K→Half

12.4 - 13.1 mi

Top 70%
×2story building
+19ft-37ft

Overall

18510

Females

6787

F50-54

6787

Half→25K

13.1 - 15.5 mi

Top 66%
×4story building
+66ft-88ft

Overall

17438

Females

6249

F50-54

6249

25K→30K

15.5 - 18.6 mi

Top 66%
×9story building
+181ft-148ft

Overall

17688

Females

6459

F50-54

6459

30K→20M

18.6 - 20.0 mi

Top 68%
×5story building
+64ft-50ft

Overall

18020

Females

6753

F50-54

6753

20M→21M

20.0 - 21.0 mi

Top 69%
×8story building
+106ft-24ft

Overall

18337

Females

6956

F50-54

6956

21M→35K

21.0 - 21.8 mi

Top 73%
×7story building
+17ft-86ft

Overall

19455

Females

7628

F50-54

7628

35K→23M

21.8 - 23.0 mi

Top 70%
×5story building
+23ft-63ft

Overall

18733

Females

7256

F50-54

7256

23M→24M

23.0 - 24.0 mi

Top 64%
×6story building
+12ft-82ft

Overall

17102

Females

6419

F50-54

6419

24M→40K

24.0 - 24.9 mi

Top 63%
×1story
+6ft-20ft

Overall

16756

Females

6268

F50-54

6268

40K→25.2M

24.9 - 25.2 mi

Top 63%
×1story
+13ft-16ft

Overall

16660

Females

6249

F50-54

6249

25.2M→Finish

25.2 - 26.2 mi

Top 68%
×2story building
+22ft-21ft

Overall

18200

Females

7007

F50-54

7007

Passing Analysis

Category:
Athletes Passed
1830
Passed By
1298
Net Change
+532
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#18664
5K → 10K289400-111#18664#18775
10K → 15K274108+166#18775#18609
15K → 20K24480+164#18609#18445
20K → Half4129+12#18445#18433
Half → 25K21846+172#18433#18261
25K → 30K254120+134#18261#18127
30K → 20M9480+14#18127#18113
20M → 21M101107-6#18113#18119
21M → 35K26102-76#18119#18195
35K → 23M65103-38#18195#18233
23M → 24M7125+46#18233#18187
24M → 40K6819+49#18187#18138
40K → 25.2M3419+15#18138#18123
25.2M → Finish5160-9#18123#18132
TOTALS18301298+532
📊

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