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BOSTON MARATHON 2023

Emily Crichlow

Bib: 16668•F

WA

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 38%
Gender (Female)
#0 / 11423
Top 19%
Division (F18-39)
#0 / 4884
Top 33%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
22:08
Rank: #7050
Start → 5K
22:08 | 7:07/mi
10K· 6.21 mi
45:05
Rank: #8160 (-1110)
5K → 10K
22:57 | 7:23/mi
15K· 9.32 mi
1:08:34
Rank: #8895 (-735)
10K → 15K
23:29 | 7:34/mi
20K· 12.43 mi
1:32:38
Rank: #9444 (-549)
15K → 20K
24:04 | 7:45/mi
Half· 13.11 mi
1:37:43
Rank: #9458 (-14)
20K → Half
5:05 | 7:27/mi
25K· 15.53 mi
1:57:15
Rank: #10029 (-571)
Half → 25K
19:32 | 8:03/mi
30K· 18.64 mi
2:22:23
Rank: #10285 (-256)
25K → 30K
25:08 | 8:05/mi
20M
2:33:20
Rank: #10291 (-6)
30K → 20M
10:57 | 8:03/mi
21M
2:41:37
Rank: #10188 (+103)
20M → 21M
8:17 | 8:17/mi
35K· 21.75 mi
2:47:27
Rank: #10196 (-8)
21M → 35K
5:50 | 7:48/mi
23M
2:58:01
Rank: #10326 (-130)
35K → 23M
10:34 | 8:26/mi
24M
3:05:58
Rank: #10328 (-2)
23M → 24M
7:57 | 7:57/mi
40K· 24.85 mi
3:12:44
Rank: #10269 (+59)
24M → 40K
6:46 | 7:55/mi
25.2M
3:15:43
Rank: #10250 (+19)
40K → 25.2M
2:59 | 8:39/mi
Finish· 26.22 mi
3:23:06
Rank: #10071 (+179)
25.2M → Finish
7:23 | 7:15/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:37:43
Pace7:27 /mi
2nd Half
Distance13.11 mi
Time1:45:23
Pace8:02 /mi
📊Positive Split: 7.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:12:1822:087:0722:08
7:07
-
10K
6.21 mi11:35:1545:057:1522:57
7:23
+0:16
15K
9.32 mi11:58:441:08:347:2123:29
7:34
+0:11
20K
12.43 mi12:22:481:32:387:2724:04
7:45
+0:11
Half
13.11 mi12:27:531:37:437:275:05
7:27
-0:18
25K
15.53 mi12:47:251:57:157:3319:32
8:03
+0:36
30K
18.64 mi13:12:332:22:237:3825:08
8:05
+0:02
20M
20.00 mi13:23:302:33:207:4010:57
8:03
-0:02
21M
21.00 mi13:31:472:41:377:428:17
8:17
+0:14
35K
21.75 mi13:37:372:47:277:425:50
7:48
-0:29
23M
23.00 mi13:48:112:58:017:4410:34
8:26
+0:38
24M
24.00 mi13:56:083:05:587:457:57
7:57
-0:29
40K
24.85 mi14:02:543:12:447:456:46
7:55
-0:02
25.2M
25.20 mi14:05:533:15:437:462:59
8:39
+0:44
Finish
26.22 mi14:13:163:23:067:457:23
7:15
-1:24

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

7:07 /mi

Average Pace

7:45 /mi

Slowest Pace

8:39 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:21:02

40% of race

Time at Steady Pace

1:40:14

49% of race

Time at Slower Pace

21:50

11% of race

Average Pace: 7:45 /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 mi11:12:1822:087:0722:08
7:07
#7050
10K
6.21 mi11:35:1545:057:1522:57
7:23
#8160
15K
9.32 mi11:58:441:08:347:2123:29
7:34
#8895
20K
12.43 mi12:22:481:32:387:2724:04
7:45
#9444
Half
13.11 mi12:27:531:37:437:275:05
7:27
#9458
25K
15.53 mi12:47:251:57:157:3319:32
8:03
#10029
30K
18.64 mi13:12:332:22:237:3825:08
8:05
#10285
20M
20.00 mi13:23:302:33:207:4010:57
8:03
#10291
21M
21.00 mi13:31:472:41:377:428:17
8:17
#10188
35K
21.75 mi13:37:372:47:277:425:50
7:48
#10196
23M
23.00 mi13:48:112:58:017:4410:34
8:26
#10326
24M
24.00 mi13:56:083:05:587:457:57
7:57
#10328
40K
24.85 mi14:02:543:12:447:456:46
7:55
#10269
25.2M
25.20 mi14:05:533:15:437:462:59
8:39
#10250
Finish
26.22 mi14:13:163:23:067:457:23
7:15
#10071
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi705073473410668(Top 40%)2169(Top 19%)2169(Top 44%)
10K6.21 mi3.10 mi8160-11101092-3581092-3589514(Top 36%)1631(Top 14%)1631(Top 33%)
15K9.32 mi3.11 mi8895-7351384-2921384-29210668(Top 40%)2169(Top 19%)2169(Top 44%)
20K12.43 mi3.11 mi9444-5491610-2261610-22611278(Top 42%)2558(Top 22%)2558(Top 52%)
Half13.11 mi0.68 mi9458-141617-71617-79897(Top 37%)1852(Top 16%)1852(Top 38%)
25K15.53 mi2.42 mi10029-5711875-2581875-25813194(Top 50%)3737(Top 33%)3737(Top 77%)
30K18.64 mi3.11 mi10285-2562045-1702045-17011577(Top 43%)2939(Top 26%)2939(Top 60%)
20M20.00 mi1.36 mi10291-62065-202065-2010717(Top 40%)2585(Top 23%)2585(Top 53%)
21M21.00 mi1.00 mi10188+1032036+292036+299164(Top 34%)1996(Top 17%)1996(Top 41%)
35K21.75 mi0.75 mi10196-82057-212057-2110654(Top 40%)2688(Top 24%)2688(Top 55%)
23M23.00 mi1.25 mi10326-1302162-1052162-10512854(Top 48%)3978(Top 35%)3978(Top 81%)
24M24.00 mi1.00 mi10328-22187-252187-2510898(Top 41%)3029(Top 27%)3029(Top 62%)
40K24.85 mi0.85 mi10269+592183+42183+49472(Top 36%)2387(Top 21%)2387(Top 49%)
25.2M25.20 mi0.35 mi10250+192187-42187-410488(Top 39%)2914(Top 26%)2914(Top 60%)
Finish26.22 mi1.02 mi10071+1792128+592128+596762(Top 25%)1339(Top 12%)1339(Top 27%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 40%
×21stories
+97ft-345ft

Overall

10668

Females

2169

F18-39

2169

5K→10K

3.1 - 6.2 mi

Top 36%
×5stories
+79ft-138ft

Overall

9514

Females

1631

F18-39

1631

10K→15K

6.2 - 9.3 mi

Top 40%
×3stories
+67ft-78ft

Overall

10668

Females

2169

F18-39

2169

15K→20K

9.3 - 12.4 mi

Top 42%
×5stories
+106ft-86ft

Overall

11278

Females

2558

F18-39

2558

20K→Half

12.4 - 13.1 mi

Top 37%
×2stories
+19ft-37ft

Overall

9897

Females

1852

F18-39

1852

Half→25K

13.1 - 15.5 mi

Top 50%
×4stories
+66ft-88ft

Overall

13194

Females

3737

F18-39

3737

25K→30K

15.5 - 18.6 mi

Top 43%
×9stories
+181ft-148ft

Overall

11577

Females

2939

F18-39

2939

30K→20M

18.6 - 20.0 mi

Top 40%
×5stories
+64ft-50ft

Overall

10717

Females

2585

F18-39

2585

20M→21M

20.0 - 21.0 mi

Top 34%
×8stories
+106ft-24ft

Overall

9164

Females

1996

F18-39

1996

21M→35K

21.0 - 21.8 mi

Top 40%
×7stories
+17ft-86ft

Overall

10654

Females

2688

F18-39

2688

35K→23M

21.8 - 23.0 mi

Top 48%
×5stories
+23ft-63ft

Overall

12854

Females

3978

F18-39

3978

23M→24M

23.0 - 24.0 mi

Top 41%
×6stories
+12ft-82ft

Overall

10898

Females

3029

F18-39

3029

24M→40K

24.0 - 24.9 mi

Top 36%
×1story
+6ft-20ft

Overall

9472

Females

2387

F18-39

2387

40K→25.2M

24.9 - 25.2 mi

Top 39%
×1story
+13ft-16ft

Overall

10488

Females

2914

F18-39

2914

25.2M→Finish

25.2 - 26.2 mi

Top 25%
×2stories
+22ft-21ft

Overall

6762

Females

1339

F18-39

1339

Passing Analysis

Category:
Athletes Passed
918*
Passed By
3937
Net Change
-3021
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#7050
5K → 10K181128-1110#7050#8160
10K → 15K20755-735#8160#8895
15K → 20K31580-549#8895#9444
20K → Half1933-14#9444#9458
Half → 25K37606-571#9458#10029
25K → 30K87343-256#10029#10285
30K → 20M77*83-6#10285#10291
20M → 21M13835+103#10291#10188
21M → 35K4654-8#10188#10196
35K → 23M55185-130#10196#10326
23M → 24M6466-2#10326#10328
24M → 40K9637+59#10328#10269
40K → 25.2M43*24+19#10269#10250
25.2M → Finish1878+179#10250#10071
TOTALS918*3937-3021

* 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