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BOSTON MARATHON 2023

Lindsey Amerson

Bib: 13133•F

GA

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 31%
Gender (Female)
#0 / 11423
Top 12%
Masters (Masters Women)
#0 / 6539
Top 4%
Division (F40-44)
#0 / 1878
Top 10%
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
7:30/mi
23:19
↑ 97↓ 3451.5%
10K· 6.21 mi
7:23/mi
46:14
↑ 79↓ 1380.4%
15K· 9.32 mi
7:26/mi
1:09:19
↑ 67↓ 78
20K· 12.43 mi
7:31/mi
1:32:39
↑ 106↓ 860.1%
Half· 13.11 mi
7:26/mi
1:37:43
↑ 19↓ 370.5%
25K· 15.53 mi
7:28/mi
1:55:50
↑ 66↓ 880.2%
30K· 18.64 mi
7:36/mi
2:19:27
↑ 181↓ 1480.2%
20M
7:32/mi
2:29:41
↑ 64↓ 500.2%
21M
8:00/mi
2:37:41
↑ 106↓ 241.6%
35K· 21.75 mi
7:14/mi
2:43:06
↑ 17↓ 861.7%
23M
7:41/mi
2:52:43
↑ 23↓ 630.6%
24M
7:28/mi
3:00:11
↓ 821.3%
40K· 24.85 mi
7:30/mi
3:06:36
↓ 200.3%
25.2M
8:16/mi
3:09:27
↑ 13↓ 160.2%
Finish· 26.22 mi
7:33/mi
3:17:09
↑ 22↓ 21

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
Time1:39:26
Pace7:35 /mi
📊Positive Split: 1.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:51:1123:197:3023:19
7:30
-
10K
6.21 mi11:14:0646:147:2622:55
7:23
-0:07
15K
9.32 mi11:37:111:09:197:2623:05
7:26
+0:03
20K
12.43 mi12:00:311:32:397:2723:20
7:31
+0:05
Half
13.11 mi12:05:351:37:437:275:04
7:26
-0:05
25K
15.53 mi12:23:421:55:507:2718:07
7:28
+0:02
30K
18.64 mi12:47:192:19:277:2923:37
7:36
+0:08
20M
20.00 mi12:57:332:29:417:2910:14
7:32
-0:04
21M
21.00 mi13:05:332:37:417:318:00
8:00
+0:28
35K
21.75 mi13:10:582:43:067:305:25
7:14
-0:46
23M
23.00 mi13:20:352:52:437:319:37
7:41
+0:27
24M
24.00 mi13:28:033:00:117:307:28
7:28
-0:13
40K
24.85 mi13:34:283:06:367:306:25
7:30
+0:02
25.2M
25.20 mi13:37:193:09:277:312:51
8:16
+0:46
Finish
26.22 mi13:45:013:17:097:317:42
7:33
-0:43

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

7:14 /mi

Average Pace

7:31 /mi

Slowest Pace

8:16 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:06:18

94% of race

Time at Steady Pace

10:51

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:31 /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 mi10:51:1123:197:3023:19
7:30
#9681
10K
6.21 mi11:14:0646:147:2622:55
7:23
#9507
15K
9.32 mi11:37:111:09:197:2623:05
7:26
#9503
20K
12.43 mi12:00:311:32:397:2723:20
7:31
#9451
Half
13.11 mi12:05:351:37:437:275:04
7:26
#9454
25K
15.53 mi12:23:421:55:507:2718:07
7:28
#9291
30K
18.64 mi12:47:192:19:277:2923:37
7:36
#9017
20M
20.00 mi12:57:332:29:417:2910:14
7:32
#8828
21M
21.00 mi13:05:332:37:417:318:00
8:00
#8726
35K
21.75 mi13:10:582:43:067:305:25
7:14
#8634
23M
23.00 mi13:20:352:52:437:319:37
7:41
#8540
24M
24.00 mi13:28:033:00:117:307:28
7:28
#8456
40K
24.85 mi13:34:283:06:367:306:25
7:30
#8372
25.2M
25.20 mi13:37:193:09:277:312:51
8:16
#8346
Finish
26.22 mi13:45:013:17:097:317:42
7:33
#8346
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi9681169316939609(Top 36%)1665(Top 15%)1665(Top 89%)
10K6.21 mi3.10 mi9507+1741614+791614+799434(Top 35%)1600(Top 14%)1600(Top 85%)
15K9.32 mi3.11 mi9503+41616-21616-29609(Top 36%)1665(Top 15%)1665(Top 89%)
20K12.43 mi3.11 mi9451+521612+41612+49393(Top 35%)1640(Top 14%)1640(Top 87%)
Half13.11 mi0.68 mi9454-31613-11613-19649(Top 36%)1720(Top 15%)1720(Top 92%)
25K15.53 mi2.42 mi9291+1631559+541559+548586(Top 32%)1377(Top 12%)1377(Top 73%)
30K18.64 mi3.11 mi9017+2741493+661493+667957(Top 30%)1289(Top 11%)1289(Top 69%)
20M20.00 mi1.36 mi8828+1891436+571436+577027(Top 26%)1035(Top 9%)1035(Top 55%)
21M21.00 mi1.00 mi8726+1021413+231413+237379(Top 28%)1275(Top 11%)1275(Top 68%)
35K21.75 mi0.75 mi8634+921396+171396+176828(Top 26%)1046(Top 9%)1046(Top 56%)
23M23.00 mi1.25 mi8540+941390+61390+67637(Top 29%)1425(Top 12%)1425(Top 76%)
24M24.00 mi1.00 mi8456+841376+141376+147502(Top 28%)1485(Top 13%)1485(Top 79%)
40K24.85 mi0.85 mi8372+841364+121364+126795(Top 26%)1280(Top 11%)1280(Top 68%)
25.2M25.20 mi0.35 mi8346+261367-31367-38142(Top 31%)1869(Top 16%)1869(Top 100%)
Finish26.22 mi1.02 mi83461389-221389-228971(Top 34%)2222(Top 19%)2222(Top 118%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 36%
×21story building
+97ft-345ft

Overall

9609

Females

1665

F40-44

1665

5K→10K

3.1 - 6.2 mi

Top 35%
×5story building
+79ft-138ft

Overall

9434

Females

1600

F40-44

1600

10K→15K

6.2 - 9.3 mi

Top 36%
×3story building
+67ft-78ft

Overall

9609

Females

1665

F40-44

1665

15K→20K

9.3 - 12.4 mi

Top 35%
×5story building
+106ft-86ft

Overall

9393

Females

1640

F40-44

1640

20K→Half

12.4 - 13.1 mi

Top 36%
×2story building
+19ft-37ft

Overall

9649

Females

1720

F40-44

1720

Half→25K

13.1 - 15.5 mi

Top 32%
×4story building
+66ft-88ft

Overall

8586

Females

1377

F40-44

1377

25K→30K

15.5 - 18.6 mi

Top 30%
×9story building
+181ft-148ft

Overall

7957

Females

1289

F40-44

1289

30K→20M

18.6 - 20.0 mi

Top 26%
×5story building
+64ft-50ft

Overall

7027

Females

1035

F40-44

1035

20M→21M

20.0 - 21.0 mi

Top 28%
×8story building
+106ft-24ft

Overall

7379

Females

1275

F40-44

1275

21M→35K

21.0 - 21.8 mi

Top 26%
×7story building
+17ft-86ft

Overall

6828

Females

1046

F40-44

1046

35K→23M

21.8 - 23.0 mi

Top 29%
×5story building
+23ft-63ft

Overall

7637

Females

1425

F40-44

1425

23M→24M

23.0 - 24.0 mi

Top 28%
×6story building
+12ft-82ft

Overall

7502

Females

1485

F40-44

1485

24M→40K

24.0 - 24.9 mi

Top 26%
×1story
+6ft-20ft

Overall

6795

Females

1280

F40-44

1280

40K→25.2M

24.9 - 25.2 mi

Top 31%
×1story
+13ft-16ft

Overall

8142

Females

1869

F40-44

1869

25.2M→Finish

25.2 - 26.2 mi

Top 34%
×2story building
+22ft-21ft

Overall

8971

Females

2222

F40-44

2222

Passing Analysis

Category:
Athletes Passed
2122
Passed By
787
Net Change
+1335
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#9681
5K → 10K390216+174#9681#9507
10K → 15K164160+4#9507#9503
15K → 20K163111+52#9503#9451
20K → Half2124-3#9451#9454
Half → 25K19734+163#9454#9291
25K → 30K31743+274#9291#9017
30K → 20M19910+189#9017#8828
20M → 21M12927+102#8828#8726
21M → 35K953+92#8726#8634
35K → 23M13036+94#8634#8540
23M → 24M10420+84#8540#8456
24M → 40K10319+84#8456#8372
40K → 25.2M4115+26#8372#8346
25.2M → Finish69690#8346#8346
TOTALS2122787+1335
📊

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