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BOSTON MARATHON 2023

Karen Lambert

Bib: 21965•F

WA

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Division (F50-54)
#0 / 1207
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
8:50/mi
27:26
↑ 97↓ 3451.5%
10K· 6.21 mi
8:49/mi
54:48
↑ 79↓ 1380.4%
15K· 9.32 mi
8:57/mi
1:22:36
↑ 67↓ 78
20K· 12.43 mi
9:03/mi
1:50:44
↑ 106↓ 860.1%
Half· 13.11 mi
8:55/mi
1:56:49
↑ 19↓ 370.5%
25K· 15.53 mi
9:10/mi
2:19:02
↑ 66↓ 880.2%
30K· 18.64 mi
9:33/mi
2:48:42
↑ 181↓ 1480.2%
20M
9:32/mi
3:01:39
↑ 64↓ 500.2%
21M
10:10/mi
3:11:49
↑ 106↓ 241.6%
35K· 21.75 mi
9:37/mi
3:19:01
↑ 17↓ 861.7%
23M
9:46/mi
3:31:15
↑ 23↓ 630.6%
24M
9:20/mi
3:40:35
↓ 821.3%
40K· 24.85 mi
9:18/mi
3:48:32
↓ 200.3%
25.2M
9:37/mi
3:51:51
↑ 13↓ 160.2%
Finish· 26.22 mi
8:58/mi
4:00:59
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:56:49
Pace8:55 /mi
2nd Half
Distance13.11 mi
Time2:04:10
Pace9:28 /mi
📊Positive Split: 6.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:20:5927:268:5027:26
8:50
-
10K
6.21 mi11:48:2154:488:4927:22
8:49
-0:01
15K
9.32 mi12:16:091:22:368:5227:48
8:57
+0:08
20K
12.43 mi12:44:171:50:448:5528:08
9:03
+0:06
Half
13.11 mi12:50:221:56:498:556:05
8:55
-0:08
25K
15.53 mi13:12:352:19:028:5722:13
9:10
+0:15
30K
18.64 mi13:42:152:48:429:0329:40
9:33
+0:23
20M
20.00 mi13:55:123:01:399:0512:57
9:32
-0:01
21M
21.00 mi14:05:223:11:499:0810:10
10:10
+0:38
35K
21.75 mi14:12:343:19:019:097:12
9:37
-0:33
23M
23.00 mi14:24:483:31:159:1112:14
9:46
+0:09
24M
24.00 mi14:34:083:40:359:119:20
9:20
-0:26
40K
24.85 mi14:42:053:48:329:127:57
9:18
-0:02
25.2M
25.20 mi14:45:243:51:519:123:19
9:37
+0:19
Finish
26.22 mi14:54:324:00:599:129:08
8:58
-0:39

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

9:12 /mi

Slowest Pace

10:10 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:38:35

91% of race

Time at Steady Pace

22:24

9% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 9:11 /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 mi11:20:5927:268:5027:26
8:50
#19634
10K
6.21 mi11:48:2154:488:4927:22
8:49
#19791
15K
9.32 mi12:16:091:22:368:5227:48
8:57
#19932
20K
12.43 mi12:44:171:50:448:5528:08
9:03
#19911
Half
13.11 mi12:50:221:56:498:556:05
8:55
#19904
25K
15.53 mi13:12:352:19:028:5722:13
9:10
#19887
30K
18.64 mi13:42:152:48:429:0329:40
9:33
#19823
20M
20.00 mi13:55:123:01:399:0512:57
9:32
#19734
21M
21.00 mi14:05:223:11:499:0810:10
10:10
#19651
35K
21.75 mi14:12:343:19:019:097:12
9:37
#19686
23M
23.00 mi14:24:483:31:159:1112:14
9:46
#19676
24M
24.00 mi14:34:083:40:359:119:20
9:20
#19624
40K
24.85 mi14:42:053:48:329:127:57
9:18
#19555
25.2M
25.20 mi14:45:243:51:519:123:19
9:37
#19514
Finish
26.22 mi14:54:324:00:599:129:08
8:58
#19470
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi196347598759820264(Top 76%)7820(Top 68%)7820(Top 648%)
10K6.21 mi3.10 mi19791-1577645-477645-4719982(Top 75%)7687(Top 67%)7687(Top 637%)
15K9.32 mi3.11 mi19932-1417697-527697-5220264(Top 76%)7820(Top 68%)7820(Top 648%)
20K12.43 mi3.11 mi19911+217670+277670+2719957(Top 75%)7654(Top 67%)7654(Top 634%)
Half13.11 mi0.68 mi19904+77669+17669+120083(Top 75%)7710(Top 67%)7710(Top 639%)
25K15.53 mi2.42 mi19887+177650+197650+1919691(Top 74%)7527(Top 66%)7527(Top 624%)
30K18.64 mi3.11 mi19823+647627+237627+2319620(Top 74%)7543(Top 66%)7543(Top 625%)
20M20.00 mi1.36 mi19734+897579+487579+4818990(Top 71%)7296(Top 64%)7296(Top 604%)
21M21.00 mi1.00 mi19651+837540+397540+3918619(Top 70%)7122(Top 62%)7122(Top 590%)
35K21.75 mi0.75 mi19686-357566-267566-2620225(Top 76%)8063(Top 71%)8063(Top 668%)
23M23.00 mi1.25 mi19676+107572-67572-619346(Top 73%)7607(Top 67%)7607(Top 630%)
24M24.00 mi1.00 mi19624+527551+217551+2118618(Top 70%)7235(Top 63%)7235(Top 599%)
40K24.85 mi0.85 mi19555+697517+347517+3417549(Top 66%)6714(Top 59%)6714(Top 556%)
25.2M25.20 mi0.35 mi19514+417502+157502+1515846(Top 60%)5802(Top 51%)5802(Top 481%)
Finish26.22 mi1.02 mi19470+447482+207482+2017821(Top 67%)6825(Top 60%)6825(Top 565%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 76%
×21story building
+97ft-345ft

Overall

20264

Females

7820

F50-54

7820

5K→10K

3.1 - 6.2 mi

Top 75%
×5story building
+79ft-138ft

Overall

19982

Females

7687

F50-54

7687

10K→15K

6.2 - 9.3 mi

Top 76%
×3story building
+67ft-78ft

Overall

20264

Females

7820

F50-54

7820

15K→20K

9.3 - 12.4 mi

Top 75%
×5story building
+106ft-86ft

Overall

19957

Females

7654

F50-54

7654

20K→Half

12.4 - 13.1 mi

Top 75%
×2story building
+19ft-37ft

Overall

20083

Females

7710

F50-54

7710

Half→25K

13.1 - 15.5 mi

Top 74%
×4story building
+66ft-88ft

Overall

19691

Females

7527

F50-54

7527

25K→30K

15.5 - 18.6 mi

Top 74%
×9story building
+181ft-148ft

Overall

19620

Females

7543

F50-54

7543

30K→20M

18.6 - 20.0 mi

Top 71%
×5story building
+64ft-50ft

Overall

18990

Females

7296

F50-54

7296

20M→21M

20.0 - 21.0 mi

Top 70%
×8story building
+106ft-24ft

Overall

18619

Females

7122

F50-54

7122

21M→35K

21.0 - 21.8 mi

Top 76%
×7story building
+17ft-86ft

Overall

20225

Females

8063

F50-54

8063

35K→23M

21.8 - 23.0 mi

Top 73%
×5story building
+23ft-63ft

Overall

19346

Females

7607

F50-54

7607

23M→24M

23.0 - 24.0 mi

Top 70%
×6story building
+12ft-82ft

Overall

18618

Females

7235

F50-54

7235

24M→40K

24.0 - 24.9 mi

Top 66%
×1story
+6ft-20ft

Overall

17549

Females

6714

F50-54

6714

40K→25.2M

24.9 - 25.2 mi

Top 60%
×1story
+13ft-16ft

Overall

15846

Females

5802

F50-54

5802

25.2M→Finish

25.2 - 26.2 mi

Top 67%
×2story building
+22ft-21ft

Overall

17821

Females

6825

F50-54

6825

Passing Analysis

Category:
Athletes Passed
1543
Passed By
1379
Net Change
+164
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#19634
5K → 10K233390-157#19634#19791
10K → 15K127268-141#19791#19932
15K → 20K185164+21#19932#19911
20K → Half3124+7#19911#19904
Half → 25K135118+17#19904#19887
25K → 30K197133+64#19887#19823
30K → 20M12132+89#19823#19734
20M → 21M12542+83#19734#19651
21M → 35K3671-35#19651#19686
35K → 23M7767+10#19686#19676
23M → 24M7725+52#19676#19624
24M → 40K8011+69#19624#19555
40K → 25.2M476+41#19555#19514
25.2M → Finish7228+44#19514#19470
TOTALS15431379+164
📊

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