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BOSTON MARATHON 2023

Katlin Johnston

Bib: 15620•F

FL

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 42%
Gender (Female)
#0 / 11423
Top 23%
Division (F18-39)
#0 / 4884
Top 40%
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
7:35/mi
23:34
↑ 97↓ 3451.5%
10K· 6.21 mi
7:42/mi
47:29
↑ 79↓ 1380.4%
15K· 9.32 mi
7:31/mi
1:10:49
↑ 67↓ 78
20K· 12.43 mi
7:37/mi
1:34:30
↑ 106↓ 860.1%
Half· 13.11 mi
7:30/mi
1:39:37
↑ 19↓ 370.5%
25K· 15.53 mi
7:58/mi
1:58:57
↑ 66↓ 880.2%
30K· 18.64 mi
8:11/mi
2:24:21
↑ 181↓ 1480.2%
20M
8:17/mi
2:35:36
↑ 64↓ 500.2%
21M
9:12/mi
2:44:48
↑ 106↓ 241.6%
35K· 21.75 mi
7:28/mi
2:50:23
↑ 17↓ 861.7%
23M
8:17/mi
3:00:45
↑ 23↓ 630.6%
24M
7:49/mi
3:08:34
↓ 821.3%
40K· 24.85 mi
8:15/mi
3:15:37
↓ 200.3%
25.2M
8:54/mi
3:18:41
↑ 13↓ 160.2%
Finish· 26.22 mi
7:48/mi
3:26:38
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:39:37
Pace7:36 /mi
2nd Half
Distance13.11 mi
Time1:47:01
Pace8:10 /mi
📊Positive Split: 7.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:53:1923:347:3523:34
7:35
-
10K
6.21 mi11:17:1447:297:3923:55
7:42
+0:07
15K
9.32 mi11:40:341:10:497:3623:20
7:31
-0:11
20K
12.43 mi12:04:151:34:307:3623:41
7:37
+0:06
Half
13.11 mi12:09:221:39:377:365:07
7:30
-0:07
25K
15.53 mi12:28:421:58:577:3919:20
7:58
+0:28
30K
18.64 mi12:54:062:24:217:4525:24
8:11
+0:13
20M
20.00 mi13:05:212:35:367:4711:15
8:17
+0:06
21M
21.00 mi13:14:332:44:487:519:12
9:12
+0:55
35K
21.75 mi13:20:082:50:237:505:35
7:28
-1:44
23M
23.00 mi13:30:303:00:457:5210:22
8:17
+0:49
24M
24.00 mi13:38:193:08:347:517:49
7:49
-0:28
40K
24.85 mi13:45:223:15:377:527:03
8:15
+0:26
25.2M
25.20 mi13:48:263:18:417:533:04
8:54
+0:39
Finish
26.22 mi13:56:233:26:387:537:57
7:48
-1:06

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

7:28 /mi

Average Pace

7:53 /mi

Slowest Pace

9:12 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

34:02

16% of race

Time at Steady Pace

1:46:16

51% of race

Time at Slower Pace

1:06:20

32% of race

Average Pace: 7:53 /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 mi10:53:1923:347:3523:34
7:35
#10418
10K
6.21 mi11:17:1447:297:3923:55
7:42
#11289
15K
9.32 mi11:40:341:10:497:3623:20
7:31
#10915
20K
12.43 mi12:04:151:34:307:3623:41
7:37
#10754
Half
13.11 mi12:09:221:39:377:365:07
7:30
#10717
25K
15.53 mi12:28:421:58:577:3919:20
7:58
#10964
30K
18.64 mi12:54:062:24:217:4525:24
8:11
#11119
20M
20.00 mi13:05:212:35:367:4711:15
8:17
#11194
21M
21.00 mi13:14:332:44:487:519:12
9:12
#11400
35K
21.75 mi13:20:082:50:237:505:35
7:28
#11262
23M
23.00 mi13:30:303:00:457:5210:22
8:17
#11289
24M
24.00 mi13:38:193:08:347:517:49
7:49
#11214
40K
24.85 mi13:45:223:15:377:527:03
8:15
#11218
25.2M
25.20 mi13:48:263:18:417:533:04
8:54
#11209
Finish
26.22 mi13:56:233:26:387:537:57
7:48
#11174
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi104182048204810276(Top 39%)1974(Top 17%)1974(Top 40%)
10K6.21 mi3.10 mi11289-8712488-4402488-44012230(Top 46%)2999(Top 26%)2999(Top 61%)
15K9.32 mi3.11 mi10915+3742289+1992289+19910276(Top 39%)1974(Top 17%)1974(Top 40%)
20K12.43 mi3.11 mi10754+1612221+682221+6810281(Top 39%)2042(Top 18%)2042(Top 42%)
Half13.11 mi0.68 mi10717+372197+242197+2410315(Top 39%)2048(Top 18%)2048(Top 42%)
25K15.53 mi2.42 mi10964-2472333-1362333-13612525(Top 47%)3365(Top 29%)3365(Top 69%)
30K18.64 mi3.11 mi11119-1552475-1422475-14212163(Top 46%)3277(Top 29%)3277(Top 67%)
20M20.00 mi1.36 mi11194-752544-692544-6912216(Top 46%)3398(Top 30%)3398(Top 70%)
21M21.00 mi1.00 mi11400-2062671-1272671-12714481(Top 54%)4744(Top 42%)4744(Top 97%)
35K21.75 mi0.75 mi11262+1382613+582613+588349(Top 31%)1651(Top 14%)1651(Top 34%)
23M23.00 mi1.25 mi11289-272652-392652-3911756(Top 44%)3378(Top 30%)3378(Top 69%)
24M24.00 mi1.00 mi11214+752631+212631+219959(Top 37%)2577(Top 23%)2577(Top 53%)
40K24.85 mi0.85 mi11218-42667-362667-3611684(Top 44%)3496(Top 31%)3496(Top 72%)
25.2M25.20 mi0.35 mi11209+92677-102677-1011934(Top 45%)3672(Top 32%)3672(Top 75%)
Finish26.22 mi1.02 mi11174+352677267710705(Top 40%)3037(Top 27%)3037(Top 62%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 39%
×21story building
+97ft-345ft

Overall

10276

Females

1974

F18-39

1974

5K→10K

3.1 - 6.2 mi

Top 46%
×5story building
+79ft-138ft

Overall

12230

Females

2999

F18-39

2999

10K→15K

6.2 - 9.3 mi

Top 39%
×3story building
+67ft-78ft

Overall

10276

Females

1974

F18-39

1974

15K→20K

9.3 - 12.4 mi

Top 39%
×5story building
+106ft-86ft

Overall

10281

Females

2042

F18-39

2042

20K→Half

12.4 - 13.1 mi

Top 39%
×2story building
+19ft-37ft

Overall

10315

Females

2048

F18-39

2048

Half→25K

13.1 - 15.5 mi

Top 47%
×4story building
+66ft-88ft

Overall

12525

Females

3365

F18-39

3365

25K→30K

15.5 - 18.6 mi

Top 46%
×9story building
+181ft-148ft

Overall

12163

Females

3277

F18-39

3277

30K→20M

18.6 - 20.0 mi

Top 46%
×5story building
+64ft-50ft

Overall

12216

Females

3398

F18-39

3398

20M→21M

20.0 - 21.0 mi

Top 54%
×8story building
+106ft-24ft

Overall

14481

Females

4744

F18-39

4744

21M→35K

21.0 - 21.8 mi

Top 31%
×7story building
+17ft-86ft

Overall

8349

Females

1651

F18-39

1651

35K→23M

21.8 - 23.0 mi

Top 44%
×5story building
+23ft-63ft

Overall

11756

Females

3378

F18-39

3378

23M→24M

23.0 - 24.0 mi

Top 37%
×6story building
+12ft-82ft

Overall

9959

Females

2577

F18-39

2577

24M→40K

24.0 - 24.9 mi

Top 44%
×1story
+6ft-20ft

Overall

11684

Females

3496

F18-39

3496

40K→25.2M

24.9 - 25.2 mi

Top 45%
×1story
+13ft-16ft

Overall

11934

Females

3672

F18-39

3672

25.2M→Finish

25.2 - 26.2 mi

Top 40%
×2story building
+22ft-21ft

Overall

10705

Females

3037

F18-39

3037

Passing Analysis

Category:
Athletes Passed
1613
Passed By
2369
Net Change
-756
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#10418
5K → 10K67938-871#10418#11289
10K → 15K42147+374#11289#10915
15K → 20K24180+161#10915#10754
20K → Half4710+37#10754#10717
Half → 25K70317-247#10717#10964
25K → 30K137292-155#10964#11119
30K → 20M67142-75#11119#11194
20M → 21M35241-206#11194#11400
21M → 35K1446+138#11400#11262
35K → 23M85112-27#11262#11289
23M → 24M10732+75#11289#11214
24M → 40K6266-4#11214#11218
40K → 25.2M3526+9#11218#11209
25.2M → Finish9560+35#11209#11174
TOTALS16132369-756
📊

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