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BOSTON MARATHON 2023

Cassie Johnston

Bib: 12792•F

WI

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
27:25
Rank: #19606
Start → 5K
27:25 | 8:49/mi
10K· 6.21 mi
54:58
Rank: #19922 (-316)
5K → 10K
27:33 | 8:52/mi
15K· 9.32 mi
1:22:54
Rank: #20098 (-176)
10K → 15K
27:56 | 8:59/mi
20K· 12.43 mi
1:51:22
Rank: #20164 (-66)
15K → 20K
28:28 | 9:10/mi
Half· 13.11 mi
1:57:28
Rank: #20175 (-11)
20K → Half
6:06 | 8:56/mi
25K· 15.53 mi
2:19:46
Rank: #20104 (+71)
Half → 25K
22:18 | 9:12/mi
30K· 18.64 mi
2:50:14
Rank: #20209 (-105)
25K → 30K
30:28 | 9:48/mi
20M
3:02:36
Rank: #19959 (+250)
30K → 20M
12:22 | 9:06/mi
21M
3:12:50
Rank: #19871 (+88)
20M → 21M
10:14 | 10:14/mi
35K· 21.75 mi
3:19:53
Rank: #19858 (+13)
21M → 35K
7:03 | 9:25/mi
23M
3:32:08
Rank: #19826 (+32)
35K → 23M
12:15 | 9:47/mi
24M
3:42:00
Rank: #19867 (-41)
23M → 24M
9:52 | 9:52/mi
40K· 24.85 mi
3:50:48
Rank: #19924 (-57)
24M → 40K
8:48 | 10:18/mi
25.2M
3:54:49
Rank: #19976 (-52)
40K → 25.2M
4:01 | 11:39/mi
Finish· 26.22 mi
4:05:33
Rank: #20095 (-119)
25.2M → Finish
10:44 | 10:32/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:57:28
Pace8:58 /mi
2nd Half
Distance13.11 mi
Time2:08:05
Pace9:46 /mi
📊Positive Split: 9.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:23:2227:258:4927:25
8:49
-
10K
6.21 mi11:50:5554:588:5127:33
8:52
+0:03
15K
9.32 mi12:18:511:22:548:5427:56
8:59
+0:07
20K
12.43 mi12:47:191:51:228:5828:28
9:10
+0:11
Half
13.11 mi12:53:251:57:288:586:06
8:56
-0:14
25K
15.53 mi13:15:432:19:469:0022:18
9:12
+0:16
30K
18.64 mi13:46:112:50:149:0830:28
9:48
+0:36
20M
20.00 mi13:58:333:02:369:0812:22
9:06
-0:42
21M
21.00 mi14:08:473:12:509:1110:14
10:14
+1:08
35K
21.75 mi14:15:503:19:539:117:03
9:25
-0:49
23M
23.00 mi14:28:053:32:089:1312:15
9:47
+0:22
24M
24.00 mi14:37:573:42:009:159:52
9:52
+0:05
40K
24.85 mi14:46:453:50:489:178:48
10:18
+0:26
25.2M
25.20 mi14:50:463:54:499:194:01
11:39
+1:21
Finish
26.22 mi15:01:304:05:339:2210:44
10:32
-1:07

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

8:49 /mi

Average Pace

9:22 /mi

Slowest Pace

11:39 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:29:00

36% of race

Time at Steady Pace

1:22:26

34% of race

Time at Slower Pace

1:14:07

30% of race

Average Pace: 9:22 /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 mi11:23:2227:258:4927:25
8:49
#19606
10K
6.21 mi11:50:5554:588:5127:33
8:52
#19922
15K
9.32 mi12:18:511:22:548:5427:56
8:59
#20098
20K
12.43 mi12:47:191:51:228:5828:28
9:10
#20164
Half
13.11 mi12:53:251:57:288:586:06
8:56
#20175
25K
15.53 mi13:15:432:19:469:0022:18
9:12
#20104
30K
18.64 mi13:46:112:50:149:0830:28
9:48
#20209
20M
20.00 mi13:58:333:02:369:0812:22
9:06
#19959
21M
21.00 mi14:08:473:12:509:1110:14
10:14
#19871
35K
21.75 mi14:15:503:19:539:117:03
9:25
#19858
23M
23.00 mi14:28:053:32:089:1312:15
9:47
#19826
24M
24.00 mi14:37:573:42:009:159:52
9:52
#19867
40K
24.85 mi14:46:453:50:489:178:48
10:18
#19924
25.2M
25.20 mi14:50:463:54:499:194:01
11:39
#19976
Finish
26.22 mi15:01:304:05:339:2210:44
10:32
#20095
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi196067582758220468(Top 77%)7938(Top 69%)7938(Top 163%)
10K6.21 mi3.10 mi19922-3167723-1417723-14120278(Top 76%)7859(Top 69%)7859(Top 161%)
15K9.32 mi3.11 mi20098-1767795-727795-7220468(Top 77%)7938(Top 69%)7938(Top 163%)
20K12.43 mi3.11 mi20164-667808-137808-1320427(Top 77%)7920(Top 69%)7920(Top 162%)
Half13.11 mi0.68 mi20175-117812-47812-420229(Top 76%)7800(Top 68%)7800(Top 160%)
25K15.53 mi2.42 mi20104+717763+497763+4919840(Top 75%)7608(Top 67%)7608(Top 156%)
30K18.64 mi3.11 mi20209-1057849-867849-8620461(Top 77%)8033(Top 70%)8033(Top 164%)
20M20.00 mi1.36 mi19959+2507718+1317718+13117103(Top 64%)6233(Top 55%)6233(Top 128%)
21M21.00 mi1.00 mi19871+887664+547664+5418840(Top 71%)7254(Top 64%)7254(Top 149%)
35K21.75 mi0.75 mi19858+137674-107674-1019647(Top 74%)7732(Top 68%)7732(Top 158%)
23M23.00 mi1.25 mi19826+327662+127662+1219399(Top 73%)7631(Top 67%)7631(Top 156%)
24M24.00 mi1.00 mi19867-417693-317693-3120424(Top 77%)8217(Top 72%)8217(Top 168%)
40K24.85 mi0.85 mi19924-577740-477740-4720724(Top 78%)8451(Top 74%)8451(Top 173%)
25.2M25.20 mi0.35 mi19976-527774-347774-3421865(Top 82%)9049(Top 79%)9049(Top 185%)
Finish26.22 mi1.02 mi20095-1197855-817855-8123069(Top 87%)9678(Top 85%)9678(Top 198%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 77%
×21stories
+97ft-345ft

Overall

20468

Females

7938

F18-39

7938

5K→10K

3.1 - 6.2 mi

Top 76%
×5stories
+79ft-138ft

Overall

20278

Females

7859

F18-39

7859

10K→15K

6.2 - 9.3 mi

Top 77%
×3stories
+67ft-78ft

Overall

20468

Females

7938

F18-39

7938

15K→20K

9.3 - 12.4 mi

Top 77%
×5stories
+106ft-86ft

Overall

20427

Females

7920

F18-39

7920

20K→Half

12.4 - 13.1 mi

Top 76%
×2stories
+19ft-37ft

Overall

20229

Females

7800

F18-39

7800

Half→25K

13.1 - 15.5 mi

Top 75%
×4stories
+66ft-88ft

Overall

19840

Females

7608

F18-39

7608

25K→30K

15.5 - 18.6 mi

Top 77%
×9stories
+181ft-148ft

Overall

20461

Females

8033

F18-39

8033

30K→20M

18.6 - 20.0 mi

Top 64%
×5stories
+64ft-50ft

Overall

17103

Females

6233

F18-39

6233

20M→21M

20.0 - 21.0 mi

Top 71%
×8stories
+106ft-24ft

Overall

18840

Females

7254

F18-39

7254

21M→35K

21.0 - 21.8 mi

Top 74%
×7stories
+17ft-86ft

Overall

19647

Females

7732

F18-39

7732

35K→23M

21.8 - 23.0 mi

Top 73%
×5stories
+23ft-63ft

Overall

19399

Females

7631

F18-39

7631

23M→24M

23.0 - 24.0 mi

Top 77%
×6stories
+12ft-82ft

Overall

20424

Females

8217

F18-39

8217

24M→40K

24.0 - 24.9 mi

Top 78%
×1story
+6ft-20ft

Overall

20724

Females

8451

F18-39

8451

40K→25.2M

24.9 - 25.2 mi

Top 82%
×1story
+13ft-16ft

Overall

21865

Females

9049

F18-39

9049

25.2M→Finish

25.2 - 26.2 mi

Top 87%
×2stories
+22ft-21ft

Overall

23069

Females

9678

F18-39

9678

Passing Analysis

Category:
Athletes Passed
1342
Passed By
1831
Net Change
-489
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#19606
5K → 10K172488-316#19606#19922
10K → 15K120296-176#19922#20098
15K → 20K138204-66#20098#20164
20K → Half2334-11#20164#20175
Half → 25K16594+71#20175#20104
25K → 30K115220-105#20104#20209
30K → 20M2566+250#20209#19959
20M → 21M12638+88#19959#19871
21M → 35K5037+13#19871#19858
35K → 23M8957+32#19858#19826
23M → 24M3980-41#19826#19867
24M → 40K3087-57#19867#19924
40K → 25.2M961-52#19924#19976
25.2M → Finish10129-119#19976#20095
TOTALS13421831-489
📊

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