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BOSTON MARATHON 2023

Janae Sernoffsky

Bib: 12879•F

MA

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 28%
Gender (Female)
#0 / 11423
Top 10%
Division (F18-39)
#0 / 4884
Top 18%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
21:04
Rank: #4524
Start → 5K
21:04 | 6:47/mi
10K· 6.21 mi
42:31
Rank: #5351 (-827)
5K → 10K
21:27 | 6:54/mi
15K· 9.32 mi
1:04:20
Rank: #5864 (-513)
10K → 15K
21:49 | 7:01/mi
20K· 12.43 mi
1:26:39
Rank: #6179 (-315)
15K → 20K
22:19 | 7:11/mi
Half· 13.11 mi
1:31:32
Rank: #6260 (-81)
20K → Half
4:53 | 7:09/mi
25K· 15.53 mi
1:49:29
Rank: #6493 (-233)
Half → 25K
17:57 | 7:24/mi
30K· 18.64 mi
2:13:37
Rank: #6798 (-305)
25K → 30K
24:08 | 7:46/mi
20M
2:24:21
Rank: #6931 (-133)
30K → 20M
10:44 | 7:54/mi
21M
2:32:56
Rank: #7067 (-136)
20M → 21M
8:35 | 8:35/mi
35K· 21.75 mi
2:38:28
Rank: #7082 (-15)
21M → 35K
5:32 | 7:24/mi
23M
2:48:25
Rank: #7173 (-91)
35K → 23M
9:57 | 7:57/mi
24M
2:56:20
Rank: #7268 (-95)
23M → 24M
7:55 | 7:55/mi
40K· 24.85 mi
3:03:12
Rank: #7338 (-70)
24M → 40K
6:52 | 8:02/mi
25.2M
3:06:13
Rank: #7390 (-52)
40K → 25.2M
3:01 | 8:45/mi
Finish· 26.22 mi
3:14:18
Rank: #7530 (-140)
25.2M → Finish
8:05 | 7:56/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:31:32
Pace6:59 /mi
2nd Half
Distance13.11 mi
Time1:42:46
Pace7:50 /mi
📊Positive Split: 12.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:48:2221:046:4721:04
6:47
-
10K
6.21 mi11:09:4942:316:5121:27
6:54
+0:07
15K
9.32 mi11:31:381:04:206:5421:49
7:01
+0:07
20K
12.43 mi11:53:571:26:396:5822:19
7:11
+0:10
Half
13.11 mi11:58:501:31:326:594:53
7:09
-0:02
25K
15.53 mi12:16:471:49:297:0317:57
7:24
+0:15
30K
18.64 mi12:40:552:13:377:1024:08
7:46
+0:22
20M
20.00 mi12:51:392:24:217:1310:44
7:54
+0:08
21M
21.00 mi13:00:142:32:567:178:35
8:35
+0:41
35K
21.75 mi13:05:462:38:287:175:32
7:24
-1:11
23M
23.00 mi13:15:432:48:257:199:57
7:57
+0:33
24M
24.00 mi13:23:382:56:207:217:55
7:55
-0:02
40K
24.85 mi13:30:303:03:127:226:52
8:02
+0:07
25.2M
25.20 mi13:33:313:06:137:233:01
8:45
+0:43
Finish
26.22 mi13:41:363:14:187:258:05
7:56
-0:49

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

6:47 /mi

Average Pace

7:25 /mi

Slowest Pace

8:45 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:55:01

59% of race

Time at Steady Pace

1:07:41

35% of race

Time at Slower Pace

11:36

6% of race

Average Pace: 7:25 /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 mi10:48:2221:046:4721:04
6:47
#4524
10K
6.21 mi11:09:4942:316:5121:27
6:54
#5351
15K
9.32 mi11:31:381:04:206:5421:49
7:01
#5864
20K
12.43 mi11:53:571:26:396:5822:19
7:11
#6179
Half
13.11 mi11:58:501:31:326:594:53
7:09
#6260
25K
15.53 mi12:16:471:49:297:0317:57
7:24
#6493
30K
18.64 mi12:40:552:13:377:1024:08
7:46
#6798
20M
20.00 mi12:51:392:24:217:1310:44
7:54
#6931
21M
21.00 mi13:00:142:32:567:178:35
8:35
#7067
35K
21.75 mi13:05:462:38:287:175:32
7:24
#7082
23M
23.00 mi13:15:432:48:257:199:57
7:57
#7173
24M
24.00 mi13:23:382:56:207:217:55
7:55
#7268
40K
24.85 mi13:30:303:03:127:226:52
8:02
#7338
25.2M
25.20 mi13:33:313:06:137:233:01
8:45
#7390
Finish
26.22 mi13:41:363:14:187:258:05
7:56
#7530
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi45243013016721(Top 25%)687(Top 6%)687(Top 14%)
10K6.21 mi3.10 mi5351-827403-102403-1026174(Top 23%)571(Top 5%)571(Top 12%)
15K9.32 mi3.11 mi5864-513486-83486-836721(Top 25%)687(Top 6%)687(Top 14%)
20K12.43 mi3.11 mi6179-315561-75561-757006(Top 26%)785(Top 7%)785(Top 16%)
Half13.11 mi0.68 mi6260-81576-15576-157626(Top 29%)969(Top 8%)969(Top 20%)
25K15.53 mi2.42 mi6493-233639-63639-638063(Top 30%)1212(Top 11%)1212(Top 25%)
30K18.64 mi3.11 mi6798-305729-90729-909106(Top 34%)1744(Top 15%)1744(Top 36%)
20M20.00 mi1.36 mi6931-133766-37766-379561(Top 36%)2037(Top 18%)2037(Top 42%)
21M21.00 mi1.00 mi7067-136817-51817-5110968(Top 41%)2841(Top 25%)2841(Top 58%)
35K21.75 mi0.75 mi7082-15832-15832-157803(Top 29%)1411(Top 12%)1411(Top 29%)
23M23.00 mi1.25 mi7173-91893-61893-619401(Top 35%)2210(Top 19%)2210(Top 45%)
24M24.00 mi1.00 mi7268-95946-53946-5310648(Top 40%)2892(Top 25%)2892(Top 59%)
40K24.85 mi0.85 mi7338-70989-43989-4310258(Top 39%)2769(Top 24%)2769(Top 57%)
25.2M25.20 mi0.35 mi7390-521025-361025-3611023(Top 41%)3181(Top 28%)3181(Top 65%)
Finish26.22 mi1.02 mi7530-1401087-621087-6211624(Top 44%)3495(Top 31%)3495(Top 72%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 25%
×21stories
+97ft-345ft

Overall

6721

Females

687

F18-39

687

5K→10K

3.1 - 6.2 mi

Top 23%
×5stories
+79ft-138ft

Overall

6174

Females

571

F18-39

571

10K→15K

6.2 - 9.3 mi

Top 25%
×3stories
+67ft-78ft

Overall

6721

Females

687

F18-39

687

15K→20K

9.3 - 12.4 mi

Top 26%
×5stories
+106ft-86ft

Overall

7006

Females

785

F18-39

785

20K→Half

12.4 - 13.1 mi

Top 29%
×2stories
+19ft-37ft

Overall

7626

Females

969

F18-39

969

Half→25K

13.1 - 15.5 mi

Top 30%
×4stories
+66ft-88ft

Overall

8063

Females

1212

F18-39

1212

25K→30K

15.5 - 18.6 mi

Top 34%
×9stories
+181ft-148ft

Overall

9106

Females

1744

F18-39

1744

30K→20M

18.6 - 20.0 mi

Top 36%
×5stories
+64ft-50ft

Overall

9561

Females

2037

F18-39

2037

20M→21M

20.0 - 21.0 mi

Top 41%
×8stories
+106ft-24ft

Overall

10968

Females

2841

F18-39

2841

21M→35K

21.0 - 21.8 mi

Top 29%
×7stories
+17ft-86ft

Overall

7803

Females

1411

F18-39

1411

35K→23M

21.8 - 23.0 mi

Top 35%
×5stories
+23ft-63ft

Overall

9401

Females

2210

F18-39

2210

23M→24M

23.0 - 24.0 mi

Top 40%
×6stories
+12ft-82ft

Overall

10648

Females

2892

F18-39

2892

24M→40K

24.0 - 24.9 mi

Top 39%
×1story
+6ft-20ft

Overall

10258

Females

2769

F18-39

2769

40K→25.2M

24.9 - 25.2 mi

Top 41%
×1story
+13ft-16ft

Overall

11023

Females

3181

F18-39

3181

25.2M→Finish

25.2 - 26.2 mi

Top 44%
×2stories
+22ft-21ft

Overall

11624

Females

3495

F18-39

3495

Passing Analysis

Category:
Athletes Passed
413
Passed By
3419
Net Change
-3006
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#4524
5K → 10K35862-827#4524#5351
10K → 15K18531-513#5351#5864
15K → 20K34349-315#5864#6179
20K → Half182-81#6179#6260
Half → 25K30263-233#6260#6493
25K → 30K47352-305#6493#6798
30K → 20M25158-133#6798#6931
20M → 21M29165-136#6931#7067
21M → 35K3348-15#7067#7082
35K → 23M58149-91#7082#7173
23M → 24M30125-95#7173#7268
24M → 40K2999-70#7268#7338
40K → 25.2M1365-52#7338#7390
25.2M → Finish31171-140#7390#7530
TOTALS4133419-3006
📊

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