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BOSTON MARATHON 2023

Cara Alcorn

Bib: 18020•F

VA

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 48%
Gender (Female)
#0 / 11423
Top 31%
Division (F18-39)
#0 / 4884
Top 49%
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
8:21/mi
25:58
↑ 97↓ 3451.5%
10K· 6.21 mi
8:07/mi
51:12
↑ 79↓ 1380.4%
15K· 9.32 mi
7:56/mi
1:15:50
↑ 67↓ 78
20K· 12.43 mi
7:52/mi
1:40:15
↑ 106↓ 860.1%
Half· 13.11 mi
7:49/mi
1:45:35
↑ 19↓ 370.5%
25K· 15.53 mi
7:57/mi
2:04:51
↑ 66↓ 880.2%
30K· 18.64 mi
8:15/mi
2:30:28
↑ 181↓ 1480.2%
20M
8:12/mi
2:41:36
↑ 64↓ 500.2%
21M
8:41/mi
2:50:17
↑ 106↓ 241.6%
35K· 21.75 mi
7:46/mi
2:56:06
↑ 17↓ 861.7%
23M
8:06/mi
3:06:15
↑ 23↓ 630.6%
24M
7:48/mi
3:14:03
↓ 821.3%
40K· 24.85 mi
7:56/mi
3:20:50
↓ 200.3%
25.2M
8:19/mi
3:23:42
↑ 13↓ 160.2%
Finish· 26.22 mi
7:43/mi
3:31:34
↑ 22↓ 21

The Course

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Half Splits

1st Half· via Half⚖️ Balanced
Distance13.11 mi
Time1:45:35
Pace8:03 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:45:59
Pace8:05 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:20:5525:588:2125:58
8:21
-
10K
6.21 mi11:46:0951:128:1425:14
8:07
-0:14
15K
9.32 mi12:10:471:15:508:0824:38
7:56
-0:11
20K
12.43 mi12:35:121:40:158:0424:25
7:52
-0:04
Half
13.11 mi12:40:321:45:358:035:20
7:49
-0:03
25K
15.53 mi12:59:482:04:518:0219:16
7:57
+0:08
30K
18.64 mi13:25:252:30:288:0425:37
8:15
+0:18
20M
20.00 mi13:36:332:41:368:0511:08
8:12
-0:03
21M
21.00 mi13:45:142:50:178:078:41
8:41
+0:29
35K
21.75 mi13:51:032:56:068:065:49
7:46
-0:55
23M
23.00 mi14:01:123:06:158:0610:09
8:06
+0:20
24M
24.00 mi14:09:003:14:038:057:48
7:48
-0:18
40K
24.85 mi14:15:473:20:508:056:47
7:56
+0:08
25.2M
25.20 mi14:18:393:23:428:052:52
8:19
+0:23
Finish
26.22 mi14:26:313:31:348:057:52
7:43
-0:36

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

7:43 /mi

Average Pace

8:05 /mi

Slowest Pace

8:41 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:22:53

96% of race

Time at Steady Pace

8:41

4% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:04 /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 mi11:20:5525:588:2125:58
8:21
#16565
10K
6.21 mi11:46:0951:128:1425:14
8:07
#16114
15K
9.32 mi12:10:471:15:508:0824:38
7:56
#15391
20K
12.43 mi12:35:121:40:158:0424:25
7:52
#14626
Half
13.11 mi12:40:321:45:358:035:20
7:49
#14528
25K
15.53 mi12:59:482:04:518:0219:16
7:57
#14174
30K
18.64 mi13:25:252:30:288:0425:37
8:15
#13864
20M
20.00 mi13:36:332:41:368:0511:08
8:12
#13667
21M
21.00 mi13:45:142:50:178:078:41
8:41
#13519
35K
21.75 mi13:51:032:56:068:065:49
7:46
#13388
23M
23.00 mi14:01:123:06:158:0610:09
8:06
#13178
24M
24.00 mi14:09:003:14:038:057:48
7:48
#13019
40K
24.85 mi14:15:473:20:508:056:47
7:56
#12873
25.2M
25.20 mi14:18:393:23:428:052:52
8:19
#12808
Finish
26.22 mi14:26:313:31:348:057:52
7:43
#12697
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi165655640564013813(Top 52%)3972(Top 35%)3972(Top 81%)
10K6.21 mi3.10 mi16114+4515343+2975343+29715681(Top 59%)5064(Top 44%)5064(Top 104%)
15K9.32 mi3.11 mi15391+7234907+4364907+43613813(Top 52%)3972(Top 35%)3972(Top 81%)
20K12.43 mi3.11 mi14626+7654445+4624445+46212256(Top 46%)3114(Top 27%)3114(Top 64%)
Half13.11 mi0.68 mi14528+984382+634382+6312928(Top 49%)3457(Top 30%)3457(Top 71%)
25K15.53 mi2.42 mi14174+3544210+1724210+17212298(Top 46%)3252(Top 28%)3252(Top 67%)
30K18.64 mi3.11 mi13864+3104054+1564054+15612653(Top 48%)3557(Top 31%)3557(Top 73%)
20M20.00 mi1.36 mi13667+1973958+963958+9611680(Top 44%)3110(Top 27%)3110(Top 64%)
21M21.00 mi1.00 mi13519+1483889+693889+6911587(Top 44%)3192(Top 28%)3192(Top 65%)
35K21.75 mi0.75 mi13388+1313823+663823+6610551(Top 40%)2651(Top 23%)2651(Top 54%)
23M23.00 mi1.25 mi13178+2103721+1023721+10210549(Top 40%)2798(Top 24%)2798(Top 57%)
24M24.00 mi1.00 mi13019+1593663+583663+589846(Top 37%)2531(Top 22%)2531(Top 52%)
40K24.85 mi0.85 mi12873+1463597+663597+669647(Top 36%)2492(Top 22%)2492(Top 51%)
25.2M25.20 mi0.35 mi12808+653562+353562+358510(Top 32%)2061(Top 18%)2061(Top 42%)
Finish26.22 mi1.02 mi12697+1113518+443518+4410143(Top 38%)2774(Top 24%)2774(Top 57%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 52%
×21story building
+97ft-345ft

Overall

13813

Females

3972

F18-39

3972

5K→10K

3.1 - 6.2 mi

Top 59%
×5story building
+79ft-138ft

Overall

15681

Females

5064

F18-39

5064

10K→15K

6.2 - 9.3 mi

Top 52%
×3story building
+67ft-78ft

Overall

13813

Females

3972

F18-39

3972

15K→20K

9.3 - 12.4 mi

Top 46%
×5story building
+106ft-86ft

Overall

12256

Females

3114

F18-39

3114

20K→Half

12.4 - 13.1 mi

Top 49%
×2story building
+19ft-37ft

Overall

12928

Females

3457

F18-39

3457

Half→25K

13.1 - 15.5 mi

Top 46%
×4story building
+66ft-88ft

Overall

12298

Females

3252

F18-39

3252

25K→30K

15.5 - 18.6 mi

Top 48%
×9story building
+181ft-148ft

Overall

12653

Females

3557

F18-39

3557

30K→20M

18.6 - 20.0 mi

Top 44%
×5story building
+64ft-50ft

Overall

11680

Females

3110

F18-39

3110

20M→21M

20.0 - 21.0 mi

Top 44%
×8story building
+106ft-24ft

Overall

11587

Females

3192

F18-39

3192

21M→35K

21.0 - 21.8 mi

Top 40%
×7story building
+17ft-86ft

Overall

10551

Females

2651

F18-39

2651

35K→23M

21.8 - 23.0 mi

Top 40%
×5story building
+23ft-63ft

Overall

10549

Females

2798

F18-39

2798

23M→24M

23.0 - 24.0 mi

Top 37%
×6story building
+12ft-82ft

Overall

9846

Females

2531

F18-39

2531

24M→40K

24.0 - 24.9 mi

Top 36%
×1story
+6ft-20ft

Overall

9647

Females

2492

F18-39

2492

40K→25.2M

24.9 - 25.2 mi

Top 32%
×1story
+13ft-16ft

Overall

8510

Females

2061

F18-39

2061

25.2M→Finish

25.2 - 26.2 mi

Top 38%
×2story building
+22ft-21ft

Overall

10143

Females

2774

F18-39

2774

Passing Analysis

Category:
Athletes Passed
4207
Passed By
339
Net Change
+3868
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#16565
5K → 10K587136+451#16565#16114
10K → 15K74623+723#16114#15391
15K → 20K7705+765#15391#14626
20K → Half1035+98#14626#14528
Half → 25K36612+354#14528#14174
25K → 30K37464+310#14174#13864
30K → 20M21316+197#13864#13667
20M → 21M16618+148#13667#13519
21M → 35K1387+131#13519#13388
35K → 23M22313+210#13388#13178
23M → 24M1667+159#13178#13019
24M → 40K15913+146#13019#12873
40K → 25.2M661+65#12873#12808
25.2M → Finish13019+111#12808#12697
TOTALS4207339+3868
📊

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