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BOSTON MARATHON 2023

Alexandra Lamson

Bib: 31400•F

MA

0:00
0:00
/ mi
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
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
27:33
Rank: #19839
Start → 5K
27:33 | 8:52/mi
10K· 6.21 mi
52:44
Rank: #17831 (+2008)
5K → 10K
25:11 | 8:06/mi
15K· 9.32 mi
1:18:21
Rank: #17239 (+592)
10K → 15K
25:37 | 8:15/mi
20K· 12.43 mi
1:44:21
Rank: #16921 (+318)
15K → 20K
26:00 | 8:22/mi
Half· 13.11 mi
1:50:06
Rank: #16945 (-24)
20K → Half
5:45 | 8:26/mi
25K· 15.53 mi
2:11:26
Rank: #17092 (-147)
Half → 25K
21:20 | 8:48/mi
30K· 18.64 mi
2:41:12
Rank: #17647 (-555)
25K → 30K
29:46 | 9:35/mi
20M
2:54:51
Rank: #17986 (-339)
30K → 20M
13:39 | 10:03/mi
21M
3:05:17
Rank: #18107 (-121)
20M → 21M
10:26 | 10:26/mi
35K· 21.75 mi
3:12:11
Rank: #18150 (-43)
21M → 35K
6:54 | 9:13/mi
23M
3:24:16
Rank: #18213 (-63)
35K → 23M
12:05 | 9:39/mi
24M
3:33:48
Rank: #18282 (-69)
23M → 24M
9:32 | 9:32/mi
40K· 24.85 mi
3:42:33
Rank: #18421 (-139)
24M → 40K
8:45 | 10:14/mi
25.2M
3:45:55
Rank: #18390 (+31)
40K → 25.2M
3:22 | 9:46/mi
Finish· 26.22 mi
3:55:31
Rank: #18462 (-72)
25.2M → Finish
9:36 | 9:25/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:50:06
Pace8:24 /mi
2nd Half
Distance13.11 mi
Time2:05:25
Pace9:34 /mi
📊Positive Split: 13.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:48:0427:338:5227:33
8:52
-
10K
6.21 mi12:13:1552:448:2925:11
8:06
-0:46
15K
9.32 mi12:38:521:18:218:2425:37
8:15
+0:09
20K
12.43 mi13:04:521:44:218:2426:00
8:22
+0:07
Half
13.11 mi13:10:371:50:068:245:45
8:26
+0:04
25K
15.53 mi13:31:572:11:268:2821:20
8:48
+0:22
30K
18.64 mi14:01:432:41:128:3929:46
9:35
+0:47
20M
20.00 mi14:15:222:54:518:4513:39
10:03
+0:28
21M
21.00 mi14:25:483:05:178:4910:26
10:26
+0:23
35K
21.75 mi14:32:423:12:118:506:54
9:13
-1:13
23M
23.00 mi14:44:473:24:168:5312:05
9:39
+0:26
24M
24.00 mi14:54:193:33:488:559:32
9:32
-0:07
40K
24.85 mi15:03:043:42:338:578:45
10:14
+0:42
25.2M
25.20 mi15:06:263:45:558:583:22
9:46
-0:28
Finish
26.22 mi15:16:023:55:318:599:36
9:25
-0:21

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

8:06 /mi

Average Pace

8:59 /mi

Slowest Pace

10:26 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:11:26

56% of race

Time at Steady Pace

1:11:15

30% of race

Time at Slower Pace

32:50

14% of race

Average Pace: 8:59 /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 mi11:48:0427:338:5227:33
8:52
#19839
10K
6.21 mi12:13:1552:448:2925:11
8:06
#17831
15K
9.32 mi12:38:521:18:218:2425:37
8:15
#17239
20K
12.43 mi13:04:521:44:218:2426:00
8:22
#16921
Half
13.11 mi13:10:371:50:068:245:45
8:26
#16945
25K
15.53 mi13:31:572:11:268:2821:20
8:48
#17092
30K
18.64 mi14:01:432:41:128:3929:46
9:35
#17647
20M
20.00 mi14:15:222:54:518:4513:39
10:03
#17986
21M
21.00 mi14:25:483:05:178:4910:26
10:26
#18107
35K
21.75 mi14:32:423:12:118:506:54
9:13
#18150
23M
23.00 mi14:44:473:24:168:5312:05
9:39
#18213
24M
24.00 mi14:54:193:33:488:559:32
9:32
#18282
40K
24.85 mi15:03:043:42:338:578:45
10:14
#18421
25.2M
25.20 mi15:06:263:45:558:583:22
9:46
#18390
Finish
26.22 mi15:16:023:55:318:599:36
9:25
#18462
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi198397712771216206(Top 61%)5422(Top 47%)5422(Top 111%)
10K6.21 mi3.10 mi17831+20086423+12896423+128915571(Top 58%)5000(Top 44%)5000(Top 102%)
15K9.32 mi3.11 mi17239+5926059+3646059+36416206(Top 61%)5422(Top 47%)5422(Top 111%)
20K12.43 mi3.11 mi16921+3185879+1805879+18016066(Top 60%)5394(Top 47%)5394(Top 110%)
Half13.11 mi0.68 mi16945-245896-175896-1717388(Top 65%)6134(Top 54%)6134(Top 126%)
25K15.53 mi2.42 mi17092-1476000-1046000-10417960(Top 67%)6539(Top 57%)6539(Top 134%)
30K18.64 mi3.11 mi17647-5556344-3446344-34419718(Top 74%)7597(Top 67%)7597(Top 156%)
20M20.00 mi1.36 mi17986-3396582-2386582-23820605(Top 77%)8186(Top 72%)8186(Top 168%)
21M21.00 mi1.00 mi18107-1216659-776659-7719381(Top 73%)7565(Top 66%)7565(Top 155%)
35K21.75 mi0.75 mi18150-436693-346693-3418852(Top 71%)7306(Top 64%)7306(Top 150%)
23M23.00 mi1.25 mi18213-636733-406733-4018912(Top 71%)7356(Top 64%)7356(Top 151%)
24M24.00 mi1.00 mi18282-696789-566789-5619342(Top 73%)7632(Top 67%)7632(Top 156%)
40K24.85 mi0.85 mi18421-1396878-896878-8920582(Top 77%)8367(Top 73%)8367(Top 171%)
25.2M25.20 mi0.35 mi18390+316865+136865+1316441(Top 62%)6135(Top 54%)6135(Top 126%)
Finish26.22 mi1.02 mi18462-726913-486913-4819851(Top 75%)7908(Top 69%)7908(Top 162%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 61%
×21stories
+97ft-345ft

Overall

16206

Females

5422

F18-39

5422

5K→10K

3.1 - 6.2 mi

Top 58%
×5stories
+79ft-138ft

Overall

15571

Females

5000

F18-39

5000

10K→15K

6.2 - 9.3 mi

Top 61%
×3stories
+67ft-78ft

Overall

16206

Females

5422

F18-39

5422

15K→20K

9.3 - 12.4 mi

Top 60%
×5stories
+106ft-86ft

Overall

16066

Females

5394

F18-39

5394

20K→Half

12.4 - 13.1 mi

Top 65%
×2stories
+19ft-37ft

Overall

17388

Females

6134

F18-39

6134

Half→25K

13.1 - 15.5 mi

Top 67%
×4stories
+66ft-88ft

Overall

17960

Females

6539

F18-39

6539

25K→30K

15.5 - 18.6 mi

Top 74%
×9stories
+181ft-148ft

Overall

19718

Females

7597

F18-39

7597

30K→20M

18.6 - 20.0 mi

Top 77%
×5stories
+64ft-50ft

Overall

20605

Females

8186

F18-39

8186

20M→21M

20.0 - 21.0 mi

Top 73%
×8stories
+106ft-24ft

Overall

19381

Females

7565

F18-39

7565

21M→35K

21.0 - 21.8 mi

Top 71%
×7stories
+17ft-86ft

Overall

18852

Females

7306

F18-39

7306

35K→23M

21.8 - 23.0 mi

Top 71%
×5stories
+23ft-63ft

Overall

18912

Females

7356

F18-39

7356

23M→24M

23.0 - 24.0 mi

Top 73%
×6stories
+12ft-82ft

Overall

19342

Females

7632

F18-39

7632

24M→40K

24.0 - 24.9 mi

Top 77%
×1story
+6ft-20ft

Overall

20582

Females

8367

F18-39

8367

40K→25.2M

24.9 - 25.2 mi

Top 62%
×1story
+13ft-16ft

Overall

16441

Females

6135

F18-39

6135

25.2M→Finish

25.2 - 26.2 mi

Top 75%
×2stories
+22ft-21ft

Overall

19851

Females

7908

F18-39

7908

Passing Analysis

Category:
Athletes Passed
3472
Passed By
2095
Net Change
+1377
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#19839
5K → 10K202012+2008#19839#17831
10K → 15K62634+592#17831#17239
15K → 20K36951+318#17239#16921
20K → Half1943-24#16921#16945
Half → 25K81228-147#16945#17092
25K → 30K61616-555#17092#17647
30K → 20M21360-339#17647#17986
20M → 21M62183-121#17986#18107
21M → 35K3578-43#18107#18150
35K → 23M58121-63#18150#18213
23M → 24M31100-69#18213#18282
24M → 40K23162-139#18282#18421
40K → 25.2M398+31#18421#18390
25.2M → Finish2799-72#18390#18462
TOTALS34722095+1377
📊

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