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BOSTON MARATHON 2023

Sam Mackenzie

Bib: 15599•F

BC

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 39%
Gender (Female)
#0 / 11423
Top 20%
Division (F18-39)
#0 / 4884
Top 34%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
24:11
Rank: #12214
Start → 5K
24:11 | 7:47/mi
10K· 6.21 mi
47:35
Rank: #11417 (+797)
5K → 10K
23:24 | 7:32/mi
15K· 9.32 mi
1:10:58
Rank: #11057 (+360)
10K → 15K
23:23 | 7:32/mi
20K· 12.43 mi
1:34:26
Rank: #10701 (+356)
15K → 20K
23:28 | 7:33/mi
Half· 13.11 mi
1:39:31
Rank: #10655 (+46)
20K → Half
5:05 | 7:27/mi
25K· 15.53 mi
1:57:59
Rank: #10442 (+213)
Half → 25K
18:28 | 7:37/mi
30K· 18.64 mi
2:22:18
Rank: #10239 (+203)
25K → 30K
24:19 | 7:50/mi
20M
2:33:01
Rank: #10168 (+71)
30K → 20M
10:43 | 7:53/mi
21M
2:41:23
Rank: #10100 (+68)
20M → 21M
8:22 | 8:22/mi
35K· 21.75 mi
2:47:17
Rank: #10134 (-34)
21M → 35K
5:54 | 7:53/mi
23M
2:57:30
Rank: #10157 (-23)
35K → 23M
10:13 | 8:10/mi
24M
3:05:33
Rank: #10187 (-30)
23M → 24M
8:03 | 8:03/mi
40K· 24.85 mi
3:12:41
Rank: #10250 (-63)
24M → 40K
7:08 | 8:21/mi
25.2M
3:15:45
Rank: #10272 (-22)
40K → 25.2M
3:04 | 8:54/mi
Finish· 26.22 mi
3:23:50
Rank: #10307 (-35)
25.2M → Finish
8:05 | 7:56/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:39:31
Pace7:35 /mi
2nd Half
Distance13.11 mi
Time1:44:19
Pace7:57 /mi
📊Positive Split: 4.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:54:1024:117:4724:11
7:47
-
10K
6.21 mi11:17:3447:357:3923:24
7:32
-0:15
15K
9.32 mi11:40:571:10:587:3723:23
7:32
0:00
20K
12.43 mi12:04:251:34:267:3623:28
7:33
+0:01
Half
13.11 mi12:09:301:39:317:355:05
7:27
-0:06
25K
15.53 mi12:27:581:57:597:3618:28
7:37
+0:10
30K
18.64 mi12:52:172:22:187:3824:19
7:50
+0:13
20M
20.00 mi13:03:002:33:017:3910:43
7:53
+0:03
21M
21.00 mi13:11:222:41:237:418:22
8:22
+0:29
35K
21.75 mi13:17:162:47:177:425:54
7:53
-0:29
23M
23.00 mi13:27:292:57:307:4310:13
8:10
+0:17
24M
24.00 mi13:35:323:05:337:448:03
8:03
-0:07
40K
24.85 mi13:42:403:12:417:457:08
8:21
+0:18
25.2M
25.20 mi13:45:443:15:457:463:04
8:54
+0:33
Finish
26.22 mi13:53:493:23:507:478:05
7:56
-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

7:27 /mi

Average Pace

7:47 /mi

Slowest Pace

8:54 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:05:16

91% of race

Time at Steady Pace

15:30

8% of race

Time at Slower Pace

3:04

2% of race

Average Pace: 7:46 /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 mi10:54:1024:117:4724:11
7:47
#12214
10K
6.21 mi11:17:3447:357:3923:24
7:32
#11417
15K
9.32 mi11:40:571:10:587:3723:23
7:32
#11057
20K
12.43 mi12:04:251:34:267:3623:28
7:33
#10701
Half
13.11 mi12:09:301:39:317:355:05
7:27
#10655
25K
15.53 mi12:27:581:57:597:3618:28
7:37
#10442
30K
18.64 mi12:52:172:22:187:3824:19
7:50
#10239
20M
20.00 mi13:03:002:33:017:3910:43
7:53
#10168
21M
21.00 mi13:11:222:41:237:418:22
8:22
#10100
35K
21.75 mi13:17:162:47:177:425:54
7:53
#10134
23M
23.00 mi13:27:292:57:307:4310:13
8:10
#10157
24M
24.00 mi13:35:323:05:337:448:03
8:03
#10187
40K
24.85 mi13:42:403:12:417:457:08
8:21
#10250
25.2M
25.20 mi13:45:443:15:457:463:04
8:54
#10272
Finish
26.22 mi13:53:493:23:507:478:05
7:56
#10307
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi122142982298210400(Top 39%)2027(Top 18%)2027(Top 42%)
10K6.21 mi3.10 mi11417+7972557+4252557+42510729(Top 40%)2170(Top 19%)2170(Top 44%)
15K9.32 mi3.11 mi11057+3602361+1962361+19610400(Top 39%)2027(Top 18%)2027(Top 42%)
20K12.43 mi3.11 mi10701+3562190+1712190+1719742(Top 37%)1805(Top 16%)1805(Top 37%)
Half13.11 mi0.68 mi10655+462157+332157+339903(Top 37%)1858(Top 16%)1858(Top 38%)
25K15.53 mi2.42 mi10442+2132068+892068+899690(Top 36%)1869(Top 16%)1869(Top 38%)
30K18.64 mi3.11 mi10239+2032016+522016+529582(Top 36%)1960(Top 17%)1960(Top 40%)
20M20.00 mi1.36 mi10168+712011+52011+59490(Top 36%)2016(Top 18%)2016(Top 41%)
21M21.00 mi1.00 mi10100+681990+211990+219668(Top 36%)2224(Top 19%)2224(Top 46%)
35K21.75 mi0.75 mi10134-342024-342024-3411311(Top 42%)3018(Top 26%)3018(Top 62%)
23M23.00 mi1.25 mi10157-232077-532077-5310902(Top 41%)2969(Top 26%)2969(Top 61%)
24M24.00 mi1.00 mi10187-302118-412118-4111591(Top 44%)3369(Top 29%)3369(Top 69%)
40K24.85 mi0.85 mi10250-632174-562174-5612337(Top 46%)3837(Top 34%)3837(Top 79%)
25.2M25.20 mi0.35 mi10272-222199-252199-2511925(Top 45%)3663(Top 32%)3663(Top 75%)
Finish26.22 mi1.02 mi10307-352247-482247-4811632(Top 44%)3503(Top 31%)3503(Top 72%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 39%
×21stories
+97ft-345ft

Overall

10400

Females

2027

F18-39

2027

5K→10K

3.1 - 6.2 mi

Top 40%
×5stories
+79ft-138ft

Overall

10729

Females

2170

F18-39

2170

10K→15K

6.2 - 9.3 mi

Top 39%
×3stories
+67ft-78ft

Overall

10400

Females

2027

F18-39

2027

15K→20K

9.3 - 12.4 mi

Top 37%
×5stories
+106ft-86ft

Overall

9742

Females

1805

F18-39

1805

20K→Half

12.4 - 13.1 mi

Top 37%
×2stories
+19ft-37ft

Overall

9903

Females

1858

F18-39

1858

Half→25K

13.1 - 15.5 mi

Top 36%
×4stories
+66ft-88ft

Overall

9690

Females

1869

F18-39

1869

25K→30K

15.5 - 18.6 mi

Top 36%
×9stories
+181ft-148ft

Overall

9582

Females

1960

F18-39

1960

30K→20M

18.6 - 20.0 mi

Top 36%
×5stories
+64ft-50ft

Overall

9490

Females

2016

F18-39

2016

20M→21M

20.0 - 21.0 mi

Top 36%
×8stories
+106ft-24ft

Overall

9668

Females

2224

F18-39

2224

21M→35K

21.0 - 21.8 mi

Top 42%
×7stories
+17ft-86ft

Overall

11311

Females

3018

F18-39

3018

35K→23M

21.8 - 23.0 mi

Top 41%
×5stories
+23ft-63ft

Overall

10902

Females

2969

F18-39

2969

23M→24M

23.0 - 24.0 mi

Top 44%
×6stories
+12ft-82ft

Overall

11591

Females

3369

F18-39

3369

24M→40K

24.0 - 24.9 mi

Top 46%
×1story
+6ft-20ft

Overall

12337

Females

3837

F18-39

3837

40K→25.2M

24.9 - 25.2 mi

Top 45%
×1story
+13ft-16ft

Overall

11925

Females

3663

F18-39

3663

25.2M→Finish

25.2 - 26.2 mi

Top 44%
×2stories
+22ft-21ft

Overall

11632

Females

3503

F18-39

3503

Passing Analysis

Category:
Athletes Passed
2767*
Passed By
860
Net Change
+1907
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#12214
5K → 10K87174+797#12214#11417
10K → 15K41656+360#11417#11057
15K → 20K38327+356#11057#10701
20K → Half5812+46#10701#10655
Half → 25K24128+213#10655#10442
25K → 30K258*55+203#10442#10239
30K → 20M115*44+71#10239#10168
20M → 21M11143+68#10168#10100
21M → 35K3670-34#10100#10134
35K → 23M81104-23#10134#10157
23M → 24M6595-30#10157#10187
24M → 40K45108-63#10187#10250
40K → 25.2M27*49-22#10250#10272
25.2M → Finish6095-35#10272#10307
TOTALS2767*860+1907

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

Passing Visuals

Category:
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🔥Passing Intensity

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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