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BOSTON MARATHON 2023

Mandy Tachiki

Bib: 20390•F

CA

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 44%
Gender (Female)
#0 / 11423
Top 26%
Masters (Masters Women)
#0 / 6539
Top 13%
Division (F45-49)
#0 / 1817
Top 13%
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
7:56/mi
24:38
↑ 97↓ 3451.5%
10K· 6.21 mi
7:44/mi
48:40
↑ 79↓ 1380.4%
15K· 9.32 mi
7:56/mi
1:13:18
↑ 67↓ 78
20K· 12.43 mi
7:57/mi
1:37:59
↑ 106↓ 860.1%
Half· 13.11 mi
7:46/mi
1:43:17
↑ 19↓ 370.5%
25K· 15.53 mi
7:53/mi
2:02:24
↑ 66↓ 880.2%
30K· 18.64 mi
8:04/mi
2:27:29
↑ 181↓ 1480.2%
20M
8:04/mi
2:38:27
↑ 64↓ 500.2%
21M
8:22/mi
2:46:49
↑ 106↓ 241.6%
35K· 21.75 mi
7:32/mi
2:52:27
↑ 17↓ 861.7%
23M
8:02/mi
3:02:31
↑ 23↓ 630.6%
24M
7:41/mi
3:10:12
↓ 821.3%
40K· 24.85 mi
7:58/mi
3:17:01
↓ 200.3%
25.2M
8:39/mi
3:20:00
↑ 13↓ 160.2%
Finish· 26.22 mi
7:50/mi
3:27:59
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:43:17
Pace7:53 /mi
2nd Half
Distance13.11 mi
Time1:44:42
Pace7:59 /mi
📊Positive Split: 1.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:17:0224:387:5624:38
7:56
-
10K
6.21 mi11:41:0448:407:5024:02
7:44
-0:12
15K
9.32 mi12:05:421:13:187:5224:38
7:56
+0:12
20K
12.43 mi12:30:231:37:597:5324:41
7:57
+0:01
Half
13.11 mi12:35:411:43:177:535:18
7:46
-0:11
25K
15.53 mi12:54:482:02:247:5319:07
7:53
+0:07
30K
18.64 mi13:19:532:27:297:5525:05
8:04
+0:11
20M
20.00 mi13:30:512:38:277:5510:58
8:04
0:00
21M
21.00 mi13:39:132:46:497:578:22
8:22
+0:18
35K
21.75 mi13:44:512:52:277:565:38
7:32
-0:50
23M
23.00 mi13:54:553:02:317:5610:04
8:02
+0:30
24M
24.00 mi14:02:363:10:127:567:41
7:41
-0:21
40K
24.85 mi14:09:253:17:017:566:49
7:58
+0:17
25.2M
25.20 mi14:12:243:20:007:562:59
8:39
+0:41
Finish
26.22 mi14:20:233:27:597:567:59
7:50
-0:49

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

7:32 /mi

Average Pace

7:56 /mi

Slowest Pace

8:39 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:16:38

95% of race

Time at Steady Pace

11:21

5% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:56 /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 mi11:17:0224:387:5624:38
7:56
#13496
10K
6.21 mi11:41:0448:407:5024:02
7:44
#12998
15K
9.32 mi12:05:421:13:187:5224:38
7:56
#13274
20K
12.43 mi12:30:231:37:597:5324:41
7:57
#13172
Half
13.11 mi12:35:411:43:177:535:18
7:46
#13114
25K
15.53 mi12:54:482:02:247:5319:07
7:53
#12864
30K
18.64 mi13:19:532:27:297:5525:05
8:04
#12566
20M
20.00 mi13:30:512:38:277:5510:58
8:04
#12400
21M
21.00 mi13:39:132:46:497:578:22
8:22
#12214
35K
21.75 mi13:44:512:52:277:565:38
7:32
#12067
23M
23.00 mi13:54:553:02:317:5610:04
8:02
#11937
24M
24.00 mi14:02:363:10:127:567:41
7:41
#11788
40K
24.85 mi14:09:253:17:017:566:49
7:58
#11700
25.2M
25.20 mi14:12:243:20:007:562:59
8:39
#11671
Finish
26.22 mi14:20:233:27:597:567:59
7:50
#11610
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi134963712371213808(Top 52%)3967(Top 35%)3967(Top 218%)
10K6.21 mi3.10 mi12998+4983447+2653447+26512561(Top 47%)3181(Top 28%)3181(Top 175%)
15K9.32 mi3.11 mi13274-2763620-1733620-17313808(Top 52%)3967(Top 35%)3967(Top 218%)
20K12.43 mi3.11 mi13172+1023594+263594+2612991(Top 49%)3541(Top 31%)3541(Top 195%)
Half13.11 mi0.68 mi13114+583550+443550+4412481(Top 47%)3184(Top 28%)3184(Top 175%)
25K15.53 mi2.42 mi12864+2503436+1143436+11411803(Top 44%)2956(Top 26%)2956(Top 163%)
30K18.64 mi3.11 mi12566+2983296+1403296+14011475(Top 43%)2889(Top 25%)2889(Top 159%)
20M20.00 mi1.36 mi12400+1663214+823214+8210825(Top 41%)2653(Top 23%)2653(Top 146%)
21M21.00 mi1.00 mi12214+1863133+813133+819681(Top 36%)2237(Top 20%)2237(Top 123%)
35K21.75 mi0.75 mi12067+1473067+663067+668824(Top 33%)1857(Top 16%)1857(Top 102%)
23M23.00 mi1.25 mi11937+1303021+463021+4610071(Top 38%)2548(Top 22%)2548(Top 140%)
24M24.00 mi1.00 mi11788+1492943+782943+789025(Top 34%)2119(Top 19%)2119(Top 117%)
40K24.85 mi0.85 mi11700+882922+212922+219910(Top 37%)2608(Top 23%)2608(Top 144%)
25.2M25.20 mi0.35 mi11671+292914+82914+810518(Top 40%)2944(Top 26%)2944(Top 162%)
Finish26.22 mi1.02 mi11610+612913+12913+110961(Top 41%)3169(Top 28%)3169(Top 174%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 52%
×21story building
+97ft-345ft

Overall

13808

Females

3967

F45-49

3967

5K→10K

3.1 - 6.2 mi

Top 47%
×5story building
+79ft-138ft

Overall

12561

Females

3181

F45-49

3181

10K→15K

6.2 - 9.3 mi

Top 52%
×3story building
+67ft-78ft

Overall

13808

Females

3967

F45-49

3967

15K→20K

9.3 - 12.4 mi

Top 49%
×5story building
+106ft-86ft

Overall

12991

Females

3541

F45-49

3541

20K→Half

12.4 - 13.1 mi

Top 47%
×2story building
+19ft-37ft

Overall

12481

Females

3184

F45-49

3184

Half→25K

13.1 - 15.5 mi

Top 44%
×4story building
+66ft-88ft

Overall

11803

Females

2956

F45-49

2956

25K→30K

15.5 - 18.6 mi

Top 43%
×9story building
+181ft-148ft

Overall

11475

Females

2889

F45-49

2889

30K→20M

18.6 - 20.0 mi

Top 41%
×5story building
+64ft-50ft

Overall

10825

Females

2653

F45-49

2653

20M→21M

20.0 - 21.0 mi

Top 36%
×8story building
+106ft-24ft

Overall

9681

Females

2237

F45-49

2237

21M→35K

21.0 - 21.8 mi

Top 33%
×7story building
+17ft-86ft

Overall

8824

Females

1857

F45-49

1857

35K→23M

21.8 - 23.0 mi

Top 38%
×5story building
+23ft-63ft

Overall

10071

Females

2548

F45-49

2548

23M→24M

23.0 - 24.0 mi

Top 34%
×6story building
+12ft-82ft

Overall

9025

Females

2119

F45-49

2119

24M→40K

24.0 - 24.9 mi

Top 37%
×1story
+6ft-20ft

Overall

9910

Females

2608

F45-49

2608

40K→25.2M

24.9 - 25.2 mi

Top 40%
×1story
+13ft-16ft

Overall

10518

Females

2944

F45-49

2944

25.2M→Finish

25.2 - 26.2 mi

Top 41%
×2story building
+22ft-21ft

Overall

10961

Females

3169

F45-49

3169

Passing Analysis

Category:
Athletes Passed
2820
Passed By
934
Net Change
+1886
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#13496
5K → 10K626128+498#13496#12998
10K → 15K122398-276#12998#13274
15K → 20K224122+102#13274#13172
20K → Half7012+58#13172#13114
Half → 25K29040+250#13114#12864
25K → 30K35355+298#12864#12566
30K → 20M18923+166#12566#12400
20M → 21M20519+186#12400#12214
21M → 35K1503+147#12214#12067
35K → 23M16232+130#12067#11937
23M → 24M16314+149#11937#11788
24M → 40K11123+88#11788#11700
40K → 25.2M4011+29#11700#11671
25.2M → Finish11554+61#11671#11610
TOTALS2820934+1886
📊

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