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BOSTON MARATHON 2023

Alexandra Sizemore

Bib: 16760•F

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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Top 40%
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
25:27
Rank: #15415
Start → 5K
25:27 | 8:11/mi
10K· 6.21 mi
50:10
Rank: #14930 (+485)
5K → 10K
24:43 | 7:57/mi
15K· 9.32 mi
1:15:04
Rank: #14778 (+152)
10K → 15K
24:54 | 8:01/mi
20K· 12.43 mi
1:40:13
Rank: #14596 (+182)
15K → 20K
25:09 | 8:06/mi
Half· 13.11 mi
1:45:39
Rank: #14578 (+18)
20K → Half
5:26 | 7:58/mi
25K· 15.53 mi
2:06:03
Rank: #14745 (-167)
Half → 25K
20:24 | 8:25/mi
30K· 18.64 mi
2:32:55
Rank: #14841 (-96)
25K → 30K
26:52 | 8:39/mi
20M
2:44:31
Rank: #14742 (+99)
30K → 20M
11:36 | 8:32/mi
21M
2:53:44
Rank: #14715 (+27)
20M → 21M
9:13 | 9:13/mi
35K· 21.75 mi
3:00:03
Rank: #14706 (+9)
21M → 35K
6:19 | 8:27/mi
23M
3:11:00
Rank: #14700 (+6)
35K → 23M
10:57 | 8:45/mi
24M
3:19:25
Rank: #14642 (+58)
23M → 24M
8:25 | 8:25/mi
40K· 24.85 mi
3:26:34
Rank: #14536 (+106)
24M → 40K
7:09 | 8:22/mi
25.2M
3:29:32
Rank: #14474 (+62)
40K → 25.2M
2:58 | 8:36/mi
Finish· 26.22 mi
3:37:47
Rank: #14381 (+93)
25.2M → Finish
8:15 | 8:06/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:45:39
Pace8:04 /mi
2nd Half
Distance13.11 mi
Time1:52:08
Pace8:33 /mi
📊Positive Split: 6.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:15:3925:278:1125:27
8:11
-
10K
6.21 mi11:40:2250:108:0424:43
7:57
-0:14
15K
9.32 mi12:05:161:15:048:0324:54
8:01
+0:04
20K
12.43 mi12:30:251:40:138:0425:09
8:06
+0:05
Half
13.11 mi12:35:511:45:398:045:26
7:58
-0:08
25K
15.53 mi12:56:152:06:038:0720:24
8:25
+0:27
30K
18.64 mi13:23:072:32:558:1226:52
8:39
+0:14
20M
20.00 mi13:34:432:44:318:1411:36
8:32
-0:07
21M
21.00 mi13:43:562:53:448:169:13
9:13
+0:41
35K
21.75 mi13:50:153:00:038:176:19
8:27
-0:46
23M
23.00 mi14:01:123:11:008:1810:57
8:45
+0:18
24M
24.00 mi14:09:373:19:258:198:25
8:25
-0:20
40K
24.85 mi14:16:463:26:348:197:09
8:22
-0:03
25.2M
25.20 mi14:19:443:29:328:192:58
8:36
+0:14
Finish
26.22 mi14:27:593:37:478:198:15
8:06
-0:30

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

8:19 /mi

Slowest Pace

9:13 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:17:37

91% of race

Time at Steady Pace

20:10

9% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:18 /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 mi11:15:3925:278:1125:27
8:11
#15415
10K
6.21 mi11:40:2250:108:0424:43
7:57
#14930
15K
9.32 mi12:05:161:15:048:0324:54
8:01
#14778
20K
12.43 mi12:30:251:40:138:0425:09
8:06
#14596
Half
13.11 mi12:35:511:45:398:045:26
7:58
#14578
25K
15.53 mi12:56:152:06:038:0720:24
8:25
#14745
30K
18.64 mi13:23:072:32:558:1226:52
8:39
#14841
20M
20.00 mi13:34:432:44:318:1411:36
8:32
#14742
21M
21.00 mi13:43:562:53:448:169:13
9:13
#14715
35K
21.75 mi13:50:153:00:038:176:19
8:27
#14706
23M
23.00 mi14:01:123:11:008:1810:57
8:45
#14700
24M
24.00 mi14:09:373:19:258:198:25
8:25
#14642
40K
24.85 mi14:16:463:26:348:197:09
8:22
#14536
25.2M
25.20 mi14:19:443:29:328:192:58
8:36
#14474
Finish
26.22 mi14:27:593:37:478:198:15
8:06
#14381
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi154154909490914511(Top 55%)4392(Top 38%)4392(Top 90%)
10K6.21 mi3.10 mi14930+4854612+2974612+29714466(Top 54%)4344(Top 38%)4344(Top 89%)
15K9.32 mi3.11 mi14778+1524527+854527+8514511(Top 55%)4392(Top 38%)4392(Top 90%)
20K12.43 mi3.11 mi14596+1824430+974430+9714211(Top 53%)4233(Top 37%)4233(Top 87%)
Half13.11 mi0.68 mi14578+184414+164414+1614147(Top 53%)4178(Top 37%)4178(Top 86%)
25K15.53 mi2.42 mi14745-1674550-1364550-13615672(Top 59%)5246(Top 46%)5246(Top 107%)
30K18.64 mi3.11 mi14841-964643-934643-9315210(Top 57%)5064(Top 44%)5064(Top 104%)
20M20.00 mi1.36 mi14742+994604+394604+3913866(Top 52%)4335(Top 38%)4335(Top 89%)
21M21.00 mi1.00 mi14715+274623-194623-1914575(Top 55%)4805(Top 42%)4805(Top 98%)
35K21.75 mi0.75 mi14706+94626-34626-314990(Top 56%)5095(Top 45%)5095(Top 104%)
23M23.00 mi1.25 mi14700+64652-264652-2614685(Top 55%)4998(Top 44%)4998(Top 102%)
24M24.00 mi1.00 mi14642+584646+64646+613997(Top 53%)4671(Top 41%)4671(Top 96%)
40K24.85 mi0.85 mi14536+1064598+484598+4812507(Top 47%)3948(Top 35%)3948(Top 81%)
25.2M25.20 mi0.35 mi14474+624570+284570+2810289(Top 39%)2869(Top 25%)2869(Top 59%)
Finish26.22 mi1.02 mi14381+934531+394531+3912785(Top 48%)4109(Top 36%)4109(Top 84%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 55%
×21stories
+97ft-345ft

Overall

14511

Females

4392

F18-39

4392

5K→10K

3.1 - 6.2 mi

Top 54%
×5stories
+79ft-138ft

Overall

14466

Females

4344

F18-39

4344

10K→15K

6.2 - 9.3 mi

Top 55%
×3stories
+67ft-78ft

Overall

14511

Females

4392

F18-39

4392

15K→20K

9.3 - 12.4 mi

Top 53%
×5stories
+106ft-86ft

Overall

14211

Females

4233

F18-39

4233

20K→Half

12.4 - 13.1 mi

Top 53%
×2stories
+19ft-37ft

Overall

14147

Females

4178

F18-39

4178

Half→25K

13.1 - 15.5 mi

Top 59%
×4stories
+66ft-88ft

Overall

15672

Females

5246

F18-39

5246

25K→30K

15.5 - 18.6 mi

Top 57%
×9stories
+181ft-148ft

Overall

15210

Females

5064

F18-39

5064

30K→20M

18.6 - 20.0 mi

Top 52%
×5stories
+64ft-50ft

Overall

13866

Females

4335

F18-39

4335

20M→21M

20.0 - 21.0 mi

Top 55%
×8stories
+106ft-24ft

Overall

14575

Females

4805

F18-39

4805

21M→35K

21.0 - 21.8 mi

Top 56%
×7stories
+17ft-86ft

Overall

14990

Females

5095

F18-39

5095

35K→23M

21.8 - 23.0 mi

Top 55%
×5stories
+23ft-63ft

Overall

14685

Females

4998

F18-39

4998

23M→24M

23.0 - 24.0 mi

Top 53%
×6stories
+12ft-82ft

Overall

13997

Females

4671

F18-39

4671

24M→40K

24.0 - 24.9 mi

Top 47%
×1story
+6ft-20ft

Overall

12507

Females

3948

F18-39

3948

40K→25.2M

24.9 - 25.2 mi

Top 39%
×1story
+13ft-16ft

Overall

10289

Females

2869

F18-39

2869

25.2M→Finish

25.2 - 26.2 mi

Top 48%
×2stories
+22ft-21ft

Overall

12785

Females

4109

F18-39

4109

Passing Analysis

Category:
Athletes Passed
2201
Passed By
1167
Net Change
+1034
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#15415
5K → 10K606121+485#15415#14930
10K → 15K271119+152#14930#14778
15K → 20K287105+182#14778#14596
20K → Half4325+18#14596#14578
Half → 25K94261-167#14578#14745
25K → 30K137233-96#14745#14841
30K → 20M13233+99#14841#14742
20M → 21M9669+27#14742#14715
21M → 35K5344+9#14715#14706
35K → 23M8478+6#14706#14700
23M → 24M10446+58#14700#14642
24M → 40K1148+106#14642#14536
40K → 25.2M664+62#14536#14474
25.2M → Finish11421+93#14474#14381
TOTALS22011167+1034
📊

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