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BOSTON MARATHON 2023

Lauren Pfeiffer

Bib: 30903•F

NY

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
31:20
Rank: #23647
Start → 5K
31:20 | 10:05/mi
10K· 6.21 mi
1:02:03
Rank: #23594 (+53)
5K → 10K
30:43 | 9:53/mi
15K· 9.32 mi
1:32:17
Rank: #23373 (+221)
10K → 15K
30:14 | 9:44/mi
20K· 12.43 mi
2:02:10
Rank: #23006 (+367)
15K → 20K
29:53 | 9:37/mi
Half· 13.11 mi
2:08:32
Rank: #22945 (+61)
20K → Half
6:22 | 9:20/mi
25K· 15.53 mi
2:32:01
Rank: #22676 (+269)
Half → 25K
23:29 | 9:41/mi
30K· 18.64 mi
3:03:54
Rank: #22478 (+198)
25K → 30K
31:53 | 10:16/mi
20M
3:17:35
Rank: #22356 (+122)
30K → 20M
13:41 | 10:04/mi
21M
3:28:26
Rank: #22231 (+125)
20M → 21M
10:51 | 10:51/mi
35K· 21.75 mi
3:35:46
Rank: #22172 (+59)
21M → 35K
7:20 | 9:48/mi
23M
3:48:44
Rank: #22110 (+62)
35K → 23M
12:58 | 10:21/mi
24M
3:58:48
Rank: #22064 (+46)
23M → 24M
10:04 | 10:04/mi
40K· 24.85 mi
4:07:43
Rank: #22020 (+44)
24M → 40K
8:55 | 10:26/mi
25.2M
4:11:38
Rank: #22008 (+12)
40K → 25.2M
3:55 | 11:21/mi
Finish· 26.22 mi
4:21:21
Rank: #21958 (+50)
25.2M → Finish
9:43 | 9:32/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:08:32
Pace9:48 /mi
2nd Half
Distance13.11 mi
Time2:12:49
Pace10:08 /mi
📊Positive Split: 3.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:54:2531:2010:0531:20
10:05
-
10K
6.21 mi12:25:081:02:039:5930:43
9:53
-0:12
15K
9.32 mi12:55:221:32:179:5430:14
9:44
-0:09
20K
12.43 mi13:25:152:02:109:5029:53
9:37
-0:07
Half
13.11 mi13:31:372:08:329:486:22
9:20
-0:17
25K
15.53 mi13:55:062:32:019:4723:29
9:41
+0:21
30K
18.64 mi14:26:593:03:549:5231:53
10:16
+0:35
20M
20.00 mi14:40:403:17:359:5313:41
10:04
-0:12
21M
21.00 mi14:51:313:28:269:5610:51
10:51
+0:47
35K
21.75 mi14:58:513:35:469:557:20
9:48
-1:03
23M
23.00 mi15:11:493:48:449:5712:58
10:21
+0:33
24M
24.00 mi15:21:533:58:489:5710:04
10:04
-0:17
40K
24.85 mi15:30:484:07:439:588:55
10:26
+0:22
25.2M
25.20 mi15:34:434:11:389:593:55
11:21
+0:55
Finish
26.22 mi15:44:264:21:219:599:43
9:32
-1:49

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

9:20 /mi

Average Pace

9:59 /mi

Slowest Pace

11:21 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:47:01

41% of race

Time at Steady Pace

1:57:41

45% of race

Time at Slower Pace

36:39

14% of race

Average Pace: 9:58 /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 mi11:54:2531:2010:0531:20
10:05
#23647
10K
6.21 mi12:25:081:02:039:5930:43
9:53
#23594
15K
9.32 mi12:55:221:32:179:5430:14
9:44
#23373
20K
12.43 mi13:25:152:02:109:5029:53
9:37
#23006
Half
13.11 mi13:31:372:08:329:486:22
9:20
#22945
25K
15.53 mi13:55:062:32:019:4723:29
9:41
#22676
30K
18.64 mi14:26:593:03:549:5231:53
10:16
#22478
20M
20.00 mi14:40:403:17:359:5313:41
10:04
#22356
21M
21.00 mi14:51:313:28:269:5610:51
10:51
#22231
35K
21.75 mi14:58:513:35:469:557:20
9:48
#22172
23M
23.00 mi15:11:493:48:449:5712:58
10:21
#22110
24M
24.00 mi15:21:533:58:489:5710:04
10:04
#22064
40K
24.85 mi15:30:484:07:439:588:55
10:26
#22020
25.2M
25.20 mi15:34:434:11:389:593:55
11:21
#22008
Finish
26.22 mi15:44:264:21:219:599:43
9:32
#21958
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi236479724972422889(Top 86%)9281(Top 81%)9281(Top 190%)
10K6.21 mi3.10 mi23594+539672+529672+5223452(Top 88%)9592(Top 84%)9592(Top 196%)
15K9.32 mi3.11 mi23373+2219542+1309542+13022889(Top 86%)9281(Top 81%)9281(Top 190%)
20K12.43 mi3.11 mi23006+3679351+1919351+19121913(Top 82%)8748(Top 77%)8748(Top 179%)
Half13.11 mi0.68 mi22945+619321+309321+3021656(Top 81%)8608(Top 75%)8608(Top 176%)
25K15.53 mi2.42 mi22676+2699194+1279194+12721421(Top 80%)8516(Top 75%)8516(Top 174%)
30K18.64 mi3.11 mi22478+1989112+829112+8221700(Top 82%)8740(Top 77%)8740(Top 179%)
20M20.00 mi1.36 mi22356+1229044+689044+6820688(Top 78%)8246(Top 72%)8246(Top 169%)
21M21.00 mi1.00 mi22231+1258987+578987+5720512(Top 77%)8200(Top 72%)8200(Top 168%)
35K21.75 mi0.75 mi22172+598962+258962+2520795(Top 78%)8395(Top 73%)8395(Top 172%)
23M23.00 mi1.25 mi22110+628934+288934+2820973(Top 79%)8509(Top 74%)8509(Top 174%)
24M24.00 mi1.00 mi22064+468911+238911+2320995(Top 79%)8546(Top 75%)8546(Top 175%)
40K24.85 mi0.85 mi22020+448897+148897+1421057(Top 79%)8646(Top 76%)8646(Top 177%)
25.2M25.20 mi0.35 mi22008+128895+28895+221285(Top 80%)8748(Top 77%)8748(Top 179%)
Finish26.22 mi1.02 mi21958+508883+128883+1220272(Top 76%)8165(Top 71%)8165(Top 167%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 86%
×21stories
+97ft-345ft

Overall

22889

Females

9281

F18-39

9281

5K→10K

3.1 - 6.2 mi

Top 88%
×5stories
+79ft-138ft

Overall

23452

Females

9592

F18-39

9592

10K→15K

6.2 - 9.3 mi

Top 86%
×3stories
+67ft-78ft

Overall

22889

Females

9281

F18-39

9281

15K→20K

9.3 - 12.4 mi

Top 82%
×5stories
+106ft-86ft

Overall

21913

Females

8748

F18-39

8748

20K→Half

12.4 - 13.1 mi

Top 81%
×2stories
+19ft-37ft

Overall

21656

Females

8608

F18-39

8608

Half→25K

13.1 - 15.5 mi

Top 80%
×4stories
+66ft-88ft

Overall

21421

Females

8516

F18-39

8516

25K→30K

15.5 - 18.6 mi

Top 82%
×9stories
+181ft-148ft

Overall

21700

Females

8740

F18-39

8740

30K→20M

18.6 - 20.0 mi

Top 78%
×5stories
+64ft-50ft

Overall

20688

Females

8246

F18-39

8246

20M→21M

20.0 - 21.0 mi

Top 77%
×8stories
+106ft-24ft

Overall

20512

Females

8200

F18-39

8200

21M→35K

21.0 - 21.8 mi

Top 78%
×7stories
+17ft-86ft

Overall

20795

Females

8395

F18-39

8395

35K→23M

21.8 - 23.0 mi

Top 79%
×5stories
+23ft-63ft

Overall

20973

Females

8509

F18-39

8509

23M→24M

23.0 - 24.0 mi

Top 79%
×6stories
+12ft-82ft

Overall

20995

Females

8546

F18-39

8546

24M→40K

24.0 - 24.9 mi

Top 79%
×1story
+6ft-20ft

Overall

21057

Females

8646

F18-39

8646

40K→25.2M

24.9 - 25.2 mi

Top 80%
×1story
+13ft-16ft

Overall

21285

Females

8748

F18-39

8748

25.2M→Finish

25.2 - 26.2 mi

Top 76%
×2stories
+22ft-21ft

Overall

20272

Females

8165

F18-39

8165

Passing Analysis

Category:
Athletes Passed
2057
Passed By
368
Net Change
+1689
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#23647
5K → 10K228175+53#23647#23594
10K → 15K26342+221#23594#23373
15K → 20K3725+367#23373#23006
20K → Half676+61#23006#22945
Half → 25K2723+269#22945#22676
25K → 30K23335+198#22676#22478
30K → 20M13412+122#22478#22356
20M → 21M13510+125#22356#22231
21M → 35K667+59#22231#22172
35K → 23M8018+62#22172#22110
23M → 24M6216+46#22110#22064
24M → 40K5915+44#22064#22020
40K → 25.2M2412+12#22020#22008
25.2M → Finish6212+50#22008#21958
TOTALS2057368+1689
📊

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