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BOSTON MARATHON 2023

Chiyo Yamauchi

Bib: 31170•F

NY

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 49%
Gender (Female)
#0 / 11423
Top 33%
Masters (Masters Women)
#0 / 6539
Top 19%
Division (F40-44)
#0 / 1878
Top 35%
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
8:19/mi
25:50
↑ 97↓ 3451.5%
10K· 6.21 mi
7:53/mi
50:21
↑ 79↓ 1380.4%
15K· 9.32 mi
7:59/mi
1:15:08
↑ 67↓ 78
20K· 12.43 mi
8:00/mi
1:40:00
↑ 106↓ 860.1%
Half· 13.11 mi
7:49/mi
1:45:20
↑ 19↓ 370.5%
25K· 15.53 mi
8:07/mi
2:05:01
↑ 66↓ 880.2%
30K· 18.64 mi
8:20/mi
2:30:53
↑ 181↓ 1480.2%
20M
8:20/mi
2:42:12
↑ 64↓ 500.2%
21M
8:48/mi
2:51:00
↑ 106↓ 241.6%
35K· 21.75 mi
8:01/mi
2:57:00
↑ 17↓ 861.7%
23M
8:10/mi
3:07:13
↑ 23↓ 630.6%
24M
8:02/mi
3:15:15
↓ 821.3%
40K· 24.85 mi
8:04/mi
3:22:09
↓ 200.3%
25.2M
8:36/mi
3:25:07
↑ 13↓ 160.2%
Finish· 26.22 mi
7:38/mi
3:32:54
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:45:20
Pace8:02 /mi
2nd Half
Distance13.11 mi
Time1:47:34
Pace8:12 /mi
📊Positive Split: 2.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:44:0425:508:1925:50
8:19
-
10K
6.21 mi12:08:3550:218:0624:31
7:53
-0:26
15K
9.32 mi12:33:221:15:088:0424:47
7:59
+0:06
20K
12.43 mi12:58:141:40:008:0324:52
8:00
+0:01
Half
13.11 mi13:03:341:45:208:025:20
7:49
-0:11
25K
15.53 mi13:23:152:05:018:0319:41
8:07
+0:18
30K
18.64 mi13:49:072:30:538:0625:52
8:20
+0:13
20M
20.00 mi14:00:262:42:128:0711:19
8:20
0:00
21M
21.00 mi14:09:142:51:008:098:48
8:48
+0:28
35K
21.75 mi14:15:142:57:008:086:00
8:01
-0:47
23M
23.00 mi14:25:273:07:138:0810:13
8:10
+0:09
24M
24.00 mi14:33:293:15:158:088:02
8:02
-0:08
40K
24.85 mi14:40:233:22:098:086:54
8:04
+0:02
25.2M
25.20 mi14:43:213:25:078:082:58
8:36
+0:32
Finish
26.22 mi14:51:083:32:548:087:47
7:38
-0:58

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

7:38 /mi

Average Pace

8:08 /mi

Slowest Pace

8:48 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:21:08

94% of race

Time at Steady Pace

11:46

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:07 /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 mi11:44:0425:508:1925:50
8:19
#16257
10K
6.21 mi12:08:3550:218:0624:31
7:53
#15147
15K
9.32 mi12:33:221:15:088:0424:47
7:59
#14834
20K
12.43 mi12:58:141:40:008:0324:52
8:00
#14446
Half
13.11 mi13:03:341:45:208:025:20
7:49
#14363
25K
15.53 mi13:23:152:05:018:0319:41
8:07
#14259
30K
18.64 mi13:49:072:30:538:0625:52
8:20
#14064
20M
20.00 mi14:00:262:42:128:0711:19
8:20
#13912
21M
21.00 mi14:09:142:51:008:098:48
8:48
#13780
35K
21.75 mi14:15:142:57:008:086:00
8:01
#13708
23M
23.00 mi14:25:273:07:138:0810:13
8:10
#13520
24M
24.00 mi14:33:293:15:158:088:02
8:02
#13383
40K
24.85 mi14:40:233:22:098:086:54
8:04
#13250
25.2M
25.20 mi14:43:213:25:078:082:58
8:36
#13178
Finish
26.22 mi14:51:083:32:548:087:47
7:38
#13029
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi162575438543814201(Top 53%)4200(Top 37%)4200(Top 224%)
10K6.21 mi3.10 mi15147+11104740+6984740+69813919(Top 52%)3995(Top 35%)3995(Top 213%)
15K9.32 mi3.11 mi14834+3134558+1824558+18214201(Top 53%)4200(Top 37%)4200(Top 224%)
20K12.43 mi3.11 mi14446+3884338+2204338+22013476(Top 51%)3809(Top 33%)3809(Top 203%)
Half13.11 mi0.68 mi14363+834296+424296+4212938(Top 49%)3467(Top 30%)3467(Top 185%)
25K15.53 mi2.42 mi14259+1044261+354261+3513627(Top 51%)3994(Top 35%)3994(Top 213%)
30K18.64 mi3.11 mi14064+1954186+754186+7513183(Top 50%)3859(Top 34%)3859(Top 205%)
20M20.00 mi1.36 mi13912+1524106+804106+8012559(Top 47%)3616(Top 32%)3616(Top 193%)
21M21.00 mi1.00 mi13780+1324044+624044+6212276(Top 46%)3553(Top 31%)3553(Top 189%)
35K21.75 mi0.75 mi13708+724012+324012+3212321(Top 46%)3612(Top 32%)3612(Top 192%)
23M23.00 mi1.25 mi13520+1883925+873925+8710925(Top 41%)2992(Top 26%)2992(Top 159%)
24M24.00 mi1.00 mi13383+1373863+623863+6211508(Top 43%)3339(Top 29%)3339(Top 178%)
40K24.85 mi0.85 mi13250+1333806+573806+5710563(Top 40%)2925(Top 26%)2925(Top 156%)
25.2M25.20 mi0.35 mi13178+723783+233783+2310266(Top 39%)2846(Top 25%)2846(Top 152%)
Finish26.22 mi1.02 mi13029+1493716+673716+679587(Top 36%)2517(Top 22%)2517(Top 134%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 53%
×21story building
+97ft-345ft

Overall

14201

Females

4200

F40-44

4200

5K→10K

3.1 - 6.2 mi

Top 52%
×5story building
+79ft-138ft

Overall

13919

Females

3995

F40-44

3995

10K→15K

6.2 - 9.3 mi

Top 53%
×3story building
+67ft-78ft

Overall

14201

Females

4200

F40-44

4200

15K→20K

9.3 - 12.4 mi

Top 51%
×5story building
+106ft-86ft

Overall

13476

Females

3809

F40-44

3809

20K→Half

12.4 - 13.1 mi

Top 49%
×2story building
+19ft-37ft

Overall

12938

Females

3467

F40-44

3467

Half→25K

13.1 - 15.5 mi

Top 51%
×4story building
+66ft-88ft

Overall

13627

Females

3994

F40-44

3994

25K→30K

15.5 - 18.6 mi

Top 50%
×9story building
+181ft-148ft

Overall

13183

Females

3859

F40-44

3859

30K→20M

18.6 - 20.0 mi

Top 47%
×5story building
+64ft-50ft

Overall

12559

Females

3616

F40-44

3616

20M→21M

20.0 - 21.0 mi

Top 46%
×8story building
+106ft-24ft

Overall

12276

Females

3553

F40-44

3553

21M→35K

21.0 - 21.8 mi

Top 46%
×7story building
+17ft-86ft

Overall

12321

Females

3612

F40-44

3612

35K→23M

21.8 - 23.0 mi

Top 41%
×5story building
+23ft-63ft

Overall

10925

Females

2992

F40-44

2992

23M→24M

23.0 - 24.0 mi

Top 43%
×6story building
+12ft-82ft

Overall

11508

Females

3339

F40-44

3339

24M→40K

24.0 - 24.9 mi

Top 40%
×1story
+6ft-20ft

Overall

10563

Females

2925

F40-44

2925

40K→25.2M

24.9 - 25.2 mi

Top 39%
×1story
+13ft-16ft

Overall

10266

Females

2846

F40-44

2846

25.2M→Finish

25.2 - 26.2 mi

Top 36%
×2story building
+22ft-21ft

Overall

9587

Females

2517

F40-44

2517

Passing Analysis

Category:
Athletes Passed
3675
Passed By
447
Net Change
+3228
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#16257
5K → 10K115646+1110#16257#15147
10K → 15K37360+313#15147#14834
15K → 20K42335+388#14834#14446
20K → Half885+83#14446#14363
Half → 25K19288+104#14363#14259
25K → 30K28287+195#14259#14064
30K → 20M18129+152#14064#13912
20M → 21M16028+132#13912#13780
21M → 35K8816+72#13780#13708
35K → 23M20315+188#13708#13520
23M → 24M15215+137#13520#13383
24M → 40K1407+133#13383#13250
40K → 25.2M786+72#13250#13178
25.2M → Finish15910+149#13178#13029
TOTALS3675447+3228
📊

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