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BOSTON MARATHON 2023

Mika Yamaguchi

Bib: 18972•F

DC

0:00
0:00
/ mi
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Top 46%
Division (F18-39)
#0 / 4884
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
27:54
Rank: #20359
Start → 5K
8:59/mi
27:54 split
10K· 6.21 mi
54:16
Rank: #19321 (+1038)
5K → 10K
8:29/mi
26:22 split
15K· 9.32 mi
1:20:41
Rank: #18789 (+532)
10K → 15K
8:30/mi
26:25 split
20K· 12.43 mi
1:47:21
Rank: #18442 (+347)
15K → 20K
8:35/mi
26:40 split
Half· 13.11 mi
1:53:02
Rank: #18336 (+106)
20K → Half
8:20/mi
5:41 split
25K· 15.53 mi
2:13:23
Rank: #17862 (+474)
Half → 25K
8:24/mi
20:21 split
30K· 18.64 mi
2:40:07
Rank: #17293 (+569)
25K → 30K
8:36/mi
26:44 split
20M
2:51:40
Rank: #17021 (+272)
30K → 20M
8:30/mi
11:33 split
21M
3:00:19
Rank: #16723 (+298)
20M → 21M
8:39/mi
8:39 split
35K· 21.75 mi
3:06:16
Rank: #16548 (+175)
21M → 35K
7:57/mi
5:57 split
23M
3:16:25
Rank: #16191 (+357)
35K → 23M
8:06/mi
10:09 split
24M
3:24:31
Rank: #16016 (+175)
23M → 24M
8:06/mi
8:06 split
40K· 24.85 mi
3:31:28
Rank: #15823 (+193)
24M → 40K
8:08/mi
6:57 split
25.2M
3:34:26
Rank: #15743 (+80)
40K → 25.2M
8:36/mi
2:58 split
Finish· 26.22 mi
3:42:37
Rank: #15600 (+143)
25.2M → Finish
8:02/mi
8:11 split

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time1:53:02
Pace8:37 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:49:35
Pace8:22 /mi
📊Negative Split: 3.1% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:19:0127:548:5927:54
8:59
-
10K
6.21 mi11:45:2354:168:4426:22
8:29
-0:30
15K
9.32 mi12:11:481:20:418:3926:25
8:30
+0:01
20K
12.43 mi12:38:281:47:218:3826:40
8:35
+0:05
Half
13.11 mi12:44:091:53:028:375:41
8:20
-0:15
25K
15.53 mi13:04:302:13:238:3520:21
8:24
+0:04
30K
18.64 mi13:31:142:40:078:3526:44
8:36
+0:12
20M
20.00 mi13:42:472:51:408:3511:33
8:30
-0:06
21M
21.00 mi13:51:263:00:198:358:39
8:39
+0:09
35K
21.75 mi13:57:233:06:168:345:57
7:57
-0:42
23M
23.00 mi14:07:323:16:258:3210:09
8:06
+0:09
24M
24.00 mi14:15:383:24:318:318:06
8:06
0:00
40K
24.85 mi14:22:353:31:288:306:57
8:08
+0:02
25.2M
25.20 mi14:25:333:34:268:312:58
8:36
+0:28
Finish
26.22 mi14:33:443:42:378:308:11
8:02
-0:34

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

7:57 /mi

Average Pace

8:30 /mi

Slowest Pace

8:59 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:14:43

87% of race

Time at Steady Pace

27:54

13% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:29 /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 mi11:19:0127:548:5927:54
8:59
#20359
10K
6.21 mi11:45:2354:168:4426:22
8:29
#19321
15K
9.32 mi12:11:481:20:418:3926:25
8:30
#18789
20K
12.43 mi12:38:281:47:218:3826:40
8:35
#18442
Half
13.11 mi12:44:091:53:028:375:41
8:20
#18336
25K
15.53 mi13:04:302:13:238:3520:21
8:24
#17862
30K
18.64 mi13:31:142:40:078:3526:44
8:36
#17293
20M
20.00 mi13:42:472:51:408:3511:33
8:30
#17021
21M
21.00 mi13:51:263:00:198:358:39
8:39
#16723
35K
21.75 mi13:57:233:06:168:345:57
7:57
#16548
23M
23.00 mi14:07:323:16:258:3210:09
8:06
#16191
24M
24.00 mi14:15:383:24:318:318:06
8:06
#16016
40K
24.85 mi14:22:353:31:288:306:57
8:08
#15823
25.2M
25.20 mi14:25:333:34:268:312:58
8:36
#15743
Finish
26.22 mi14:33:443:42:378:308:11
8:02
#15600
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi203598029802917830(Top 67%)6399(Top 56%)6399(Top 131%)
10K6.21 mi3.10 mi19321+10387347+6827347+68218170(Top 68%)6574(Top 58%)6574(Top 135%)
15K9.32 mi3.11 mi18789+5326996+3516996+35117830(Top 67%)6399(Top 56%)6399(Top 131%)
20K12.43 mi3.11 mi18442+3476772+2246772+22417388(Top 65%)6159(Top 54%)6159(Top 126%)
Half13.11 mi0.68 mi18336+1066708+646708+6416689(Top 63%)5700(Top 50%)5700(Top 117%)
25K15.53 mi2.42 mi17862+4746453+2556453+25515552(Top 58%)5171(Top 45%)5171(Top 106%)
30K18.64 mi3.11 mi17293+5696132+3216132+32114963(Top 56%)4905(Top 43%)4905(Top 100%)
20M20.00 mi1.36 mi17021+2725982+1505982+15013661(Top 51%)4221(Top 37%)4221(Top 86%)
21M21.00 mi1.00 mi16723+2985831+1515831+15111403(Top 43%)3101(Top 27%)3101(Top 63%)
35K21.75 mi0.75 mi16548+1755742+895742+8911863(Top 45%)3370(Top 30%)3370(Top 69%)
23M23.00 mi1.25 mi16191+3575552+1905552+19010559(Top 40%)2808(Top 25%)2808(Top 57%)
24M24.00 mi1.00 mi16016+1755474+785474+7811991(Top 45%)3592(Top 31%)3592(Top 74%)
40K24.85 mi0.85 mi15823+1935377+975377+9710957(Top 41%)3143(Top 28%)3143(Top 64%)
25.2M25.20 mi0.35 mi15743+805330+475330+4710296(Top 39%)2876(Top 25%)2876(Top 59%)
Finish26.22 mi1.02 mi15600+1435262+685262+6812373(Top 46%)3904(Top 34%)3904(Top 80%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 67%
×21story building
+97ft-345ft

Overall

17830

Females

6399

F18-39

6399

5K→10K

3.1 - 6.2 mi

Top 68%
×5story building
+79ft-138ft

Overall

18170

Females

6574

F18-39

6574

10K→15K

6.2 - 9.3 mi

Top 67%
×3story building
+67ft-78ft

Overall

17830

Females

6399

F18-39

6399

15K→20K

9.3 - 12.4 mi

Top 65%
×5story building
+106ft-86ft

Overall

17388

Females

6159

F18-39

6159

20K→Half

12.4 - 13.1 mi

Top 63%
×2story building
+19ft-37ft

Overall

16689

Females

5700

F18-39

5700

Half→25K

13.1 - 15.5 mi

Top 58%
×4story building
+66ft-88ft

Overall

15552

Females

5171

F18-39

5171

25K→30K

15.5 - 18.6 mi

Top 56%
×9story building
+181ft-148ft

Overall

14963

Females

4905

F18-39

4905

30K→20M

18.6 - 20.0 mi

Top 51%
×5story building
+64ft-50ft

Overall

13661

Females

4221

F18-39

4221

20M→21M

20.0 - 21.0 mi

Top 43%
×8story building
+106ft-24ft

Overall

11403

Females

3101

F18-39

3101

21M→35K

21.0 - 21.8 mi

Top 45%
×7story building
+17ft-86ft

Overall

11863

Females

3370

F18-39

3370

35K→23M

21.8 - 23.0 mi

Top 40%
×5story building
+23ft-63ft

Overall

10559

Females

2808

F18-39

2808

23M→24M

23.0 - 24.0 mi

Top 45%
×6story building
+12ft-82ft

Overall

11991

Females

3592

F18-39

3592

24M→40K

24.0 - 24.9 mi

Top 41%
×1story
+6ft-20ft

Overall

10957

Females

3143

F18-39

3143

40K→25.2M

24.9 - 25.2 mi

Top 39%
×1story
+13ft-16ft

Overall

10296

Females

2876

F18-39

2876

25.2M→Finish

25.2 - 26.2 mi

Top 46%
×2story building
+22ft-21ft

Overall

12373

Females

3904

F18-39

3904

Passing Analysis

Category:
Athletes Passed
4913
Passed By
154
Net Change
+4759
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#20359
5K → 10K109759+1038#20359#19321
10K → 15K56533+532#19321#18789
15K → 20K37629+347#18789#18442
20K → Half1104+106#18442#18336
Half → 25K4795+474#18336#17862
25K → 30K5723+569#17862#17293
30K → 20M2742+272#17293#17021
20M → 21M3002+298#17021#16723
21M → 35K1772+175#16723#16548
35K → 23M3581+357#16548#16191
23M → 24M1783+175#16191#16016
24M → 40K1941+193#16016#15823
40K → 25.2M833+80#15823#15743
25.2M → Finish1507+143#15743#15600
TOTALS4913154+4759
📊

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