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BOSTON MARATHON 2023

Alexa Johnston

Bib: 11859•F

BC

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 33%
Gender (Female)
#0 / 11423
Top 13%
Division (F18-39)
#0 / 4884
Top 24%
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
7:27/mi
23:10
↑ 97↓ 3451.5%
10K· 6.21 mi
7:18/mi
45:50
↑ 79↓ 1380.4%
15K· 9.32 mi
7:25/mi
1:08:54
↑ 67↓ 78
20K· 12.43 mi
7:34/mi
1:32:23
↑ 106↓ 860.1%
Half· 13.11 mi
7:34/mi
1:37:33
↑ 19↓ 370.5%
25K· 15.53 mi
7:39/mi
1:56:07
↑ 66↓ 880.2%
30K· 18.64 mi
7:43/mi
2:20:05
↑ 181↓ 1480.2%
20M
7:44/mi
2:30:35
↑ 64↓ 500.2%
21M
8:15/mi
2:38:50
↑ 106↓ 241.6%
35K· 21.75 mi
7:37/mi
2:44:32
↑ 17↓ 861.7%
23M
7:38/mi
2:54:05
↑ 23↓ 630.6%
24M
7:19/mi
3:01:24
↓ 821.3%
40K· 24.85 mi
7:26/mi
3:07:45
↓ 200.3%
25.2M
8:30/mi
3:10:41
↑ 13↓ 160.2%
Finish· 26.22 mi
7:26/mi
3:18:15
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:37:33
Pace7:26 /mi
2nd Half
Distance13.11 mi
Time1:40:42
Pace7:41 /mi
📊Positive Split: 3.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:50:0023:107:2723:10
7:27
-
10K
6.21 mi11:12:4045:507:2322:40
7:18
-0:09
15K
9.32 mi11:35:441:08:547:2423:04
7:25
+0:07
20K
12.43 mi11:59:131:32:237:2623:29
7:34
+0:09
Half
13.11 mi12:04:231:37:337:265:10
7:34
0:00
25K
15.53 mi12:22:571:56:077:2818:34
7:39
+0:05
30K
18.64 mi12:46:552:20:057:3123:58
7:43
+0:04
20M
20.00 mi12:57:252:30:357:3210:30
7:44
+0:01
21M
21.00 mi13:05:402:38:507:348:15
8:15
+0:31
35K
21.75 mi13:11:222:44:327:345:42
7:37
-0:38
23M
23.00 mi13:20:552:54:057:349:33
7:38
+0:01
24M
24.00 mi13:28:143:01:247:347:19
7:19
-0:19
40K
24.85 mi13:34:353:07:457:336:21
7:26
+0:07
25.2M
25.20 mi13:37:313:10:417:342:56
8:30
+1:04
Finish
26.22 mi13:45:053:18:157:347:34
7:26
-1:04

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

7:18 /mi

Average Pace

7:34 /mi

Slowest Pace

8:30 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:07:04

94% of race

Time at Steady Pace

11:11

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:34 /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 mi10:50:0023:107:2723:10
7:27
#9285
10K
6.21 mi11:12:4045:507:2322:40
7:18
#9014
15K
9.32 mi11:35:441:08:547:2423:04
7:25
#9130
20K
12.43 mi11:59:131:32:237:2623:29
7:34
#9279
Half
13.11 mi12:04:231:37:337:265:10
7:34
#9352
25K
15.53 mi12:22:571:56:077:2818:34
7:39
#9432
30K
18.64 mi12:46:552:20:057:3123:58
7:43
#9269
20M
20.00 mi12:57:252:30:357:3210:30
7:44
#9186
21M
21.00 mi13:05:402:38:507:348:15
8:15
#9128
35K
21.75 mi13:11:222:44:327:345:42
7:37
#9128
23M
23.00 mi13:20:552:54:057:349:33
7:38
#8992
24M
24.00 mi13:28:143:01:247:347:19
7:19
#8841
40K
24.85 mi13:34:353:07:457:336:21
7:26
#8727
25.2M
25.20 mi13:37:313:10:417:342:56
8:30
#8722
Finish
26.22 mi13:45:053:18:157:347:34
7:26
#8674
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi9285152515259568(Top 36%)1649(Top 14%)1649(Top 34%)
10K6.21 mi3.10 mi9014+2711422+1031422+1038847(Top 33%)1348(Top 12%)1348(Top 28%)
15K9.32 mi3.11 mi9130-1161474-521474-529568(Top 36%)1649(Top 14%)1649(Top 34%)
20K12.43 mi3.11 mi9279-1491552-781552-789773(Top 37%)1814(Top 16%)1814(Top 37%)
Half13.11 mi0.68 mi9352-731579-271579-2710833(Top 41%)2262(Top 20%)2262(Top 46%)
25K15.53 mi2.42 mi9432-801623-441623-449972(Top 37%)1984(Top 17%)1984(Top 41%)
30K18.64 mi3.11 mi9269+1631594+291594+298751(Top 33%)1612(Top 14%)1612(Top 33%)
20M20.00 mi1.36 mi9186+831582+121582+128385(Top 31%)1549(Top 14%)1549(Top 32%)
21M21.00 mi1.00 mi9128+581587-51587-58929(Top 34%)1891(Top 17%)1891(Top 39%)
35K21.75 mi0.75 mi91281598-111598-119422(Top 35%)2099(Top 18%)2099(Top 43%)
23M23.00 mi1.25 mi8992+1361565+331565+337305(Top 27%)1302(Top 11%)1302(Top 27%)
24M24.00 mi1.00 mi8841+1511538+271538+276527(Top 25%)1088(Top 10%)1088(Top 22%)
40K24.85 mi0.85 mi8727+1141508+301508+306290(Top 24%)1086(Top 10%)1086(Top 22%)
25.2M25.20 mi0.35 mi8722+51514-61514-69598(Top 36%)2481(Top 22%)2481(Top 51%)
Finish26.22 mi1.02 mi8674+481517-31517-37987(Top 30%)1817(Top 16%)1817(Top 37%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 36%
×21story building
+97ft-345ft

Overall

9568

Females

1649

F18-39

1649

5K→10K

3.1 - 6.2 mi

Top 33%
×5story building
+79ft-138ft

Overall

8847

Females

1348

F18-39

1348

10K→15K

6.2 - 9.3 mi

Top 36%
×3story building
+67ft-78ft

Overall

9568

Females

1649

F18-39

1649

15K→20K

9.3 - 12.4 mi

Top 37%
×5story building
+106ft-86ft

Overall

9773

Females

1814

F18-39

1814

20K→Half

12.4 - 13.1 mi

Top 41%
×2story building
+19ft-37ft

Overall

10833

Females

2262

F18-39

2262

Half→25K

13.1 - 15.5 mi

Top 37%
×4story building
+66ft-88ft

Overall

9972

Females

1984

F18-39

1984

25K→30K

15.5 - 18.6 mi

Top 33%
×9story building
+181ft-148ft

Overall

8751

Females

1612

F18-39

1612

30K→20M

18.6 - 20.0 mi

Top 31%
×5story building
+64ft-50ft

Overall

8385

Females

1549

F18-39

1549

20M→21M

20.0 - 21.0 mi

Top 34%
×8story building
+106ft-24ft

Overall

8929

Females

1891

F18-39

1891

21M→35K

21.0 - 21.8 mi

Top 35%
×7story building
+17ft-86ft

Overall

9422

Females

2099

F18-39

2099

35K→23M

21.8 - 23.0 mi

Top 27%
×5story building
+23ft-63ft

Overall

7305

Females

1302

F18-39

1302

23M→24M

23.0 - 24.0 mi

Top 25%
×6story building
+12ft-82ft

Overall

6527

Females

1088

F18-39

1088

24M→40K

24.0 - 24.9 mi

Top 24%
×1story
+6ft-20ft

Overall

6290

Females

1086

F18-39

1086

40K→25.2M

24.9 - 25.2 mi

Top 36%
×1story
+13ft-16ft

Overall

9598

Females

2481

F18-39

2481

25.2M→Finish

25.2 - 26.2 mi

Top 30%
×2story building
+22ft-21ft

Overall

7987

Females

1817

F18-39

1817

Passing Analysis

Category:
Athletes Passed
1780*
Passed By
1169
Net Change
+611
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#9285
5K → 10K414143+271#9285#9014
10K → 15K104220-116#9014#9130
15K → 20K94243-149#9130#9279
20K → Half780-73#9279#9352
Half → 25K93173-80#9352#9432
25K → 30K251*88+163#9432#9269
30K → 20M12037+83#9269#9186
20M → 21M10648+58#9186#9128
21M → 35K39390#9128#9128
35K → 23M15317+136#9128#8992
23M → 24M1587+151#8992#8841
24M → 40K12511+114#8841#8727
40K → 25.2M2924+5#8727#8722
25.2M → Finish8739+48#8722#8674
TOTALS1780*1169+611

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

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