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BOSTON MARATHON 2023

Lois Walker

Bib: 19699•F

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Top 45%
Division (F45-49)
#0 / 1817
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
7:54/mi
24:33
↑ 97↓ 3451.5%
10K· 6.21 mi
7:40/mi
48:21
↑ 79↓ 1380.4%
15K· 9.32 mi
7:53/mi
1:12:51
↑ 67↓ 78
20K· 12.43 mi
9:12/mi
1:41:25
↑ 106↓ 860.1%
Half· 13.11 mi
8:39/mi
1:47:19
↑ 19↓ 370.5%
25K· 15.53 mi
9:04/mi
2:09:17
↑ 66↓ 880.2%
30K· 18.64 mi
9:41/mi
2:39:22
↑ 181↓ 1480.2%
20M
9:15/mi
2:51:56
↑ 64↓ 500.2%
21M
10:44/mi
3:02:40
↑ 106↓ 241.6%
35K· 21.75 mi
8:43/mi
3:09:11
↑ 17↓ 861.7%
23M
9:09/mi
3:20:39
↑ 23↓ 630.6%
24M
8:33/mi
3:29:12
↓ 821.3%
40K· 24.85 mi
8:58/mi
3:36:52
↓ 200.3%
25.2M
10:23/mi
3:40:27
↑ 13↓ 160.2%
Finish· 26.22 mi
8:32/mi
3:49:09
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:47:19
Pace8:11 /mi
2nd Half
Distance13.11 mi
Time2:01:50
Pace9:18 /mi
📊Positive Split: 13.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:16:1124:337:5424:33
7:54
-
10K
6.21 mi11:39:5948:217:4723:48
7:40
-0:14
15K
9.32 mi12:04:291:12:517:4924:30
7:53
+0:13
20K
12.43 mi12:33:031:41:258:1028:34
9:12
+1:19
Half
13.11 mi12:38:571:47:198:115:54
8:39
-0:33
25K
15.53 mi13:00:552:09:178:1921:58
9:04
+0:25
30K
18.64 mi13:31:002:39:228:3330:05
9:41
+0:37
20M
20.00 mi13:43:342:51:568:3612:34
9:15
-0:26
21M
21.00 mi13:54:183:02:408:4210:44
10:44
+1:29
35K
21.75 mi14:00:493:09:118:426:31
8:43
-2:01
23M
23.00 mi14:12:173:20:398:4311:28
9:09
+0:26
24M
24.00 mi14:20:503:29:128:438:33
8:33
-0:36
40K
24.85 mi14:28:303:36:528:447:40
8:58
+0:25
25.2M
25.20 mi14:32:053:40:278:453:35
10:23
+1:25
Finish
26.22 mi14:40:473:49:098:458:42
8:32
-1:51

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

7:40 /mi

Average Pace

8:45 /mi

Slowest Pace

10:44 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:30:06

39% of race

Time at Steady Pace

1:34:39

41% of race

Time at Slower Pace

44:24

19% of race

Average Pace: 8:44 /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 mi11:16:1124:337:5424:33
7:54
#13280
10K
6.21 mi11:39:5948:217:4723:48
7:40
#12538
15K
9.32 mi12:04:291:12:517:4924:30
7:53
#12848
20K
12.43 mi12:33:031:41:258:1028:34
9:12
#15327
Half
13.11 mi12:38:571:47:198:115:54
8:39
#15497
25K
15.53 mi13:00:552:09:178:1921:58
9:04
#16194
30K
18.64 mi13:31:002:39:228:3330:05
9:41
#17049
20M
20.00 mi13:43:342:51:568:3612:34
9:15
#17117
21M
21.00 mi13:54:183:02:408:4210:44
10:44
#17372
35K
21.75 mi14:00:493:09:118:426:31
8:43
#17331
23M
23.00 mi14:12:173:20:398:4311:28
9:09
#17312
24M
24.00 mi14:20:503:29:128:438:33
8:33
#17198
40K
24.85 mi14:28:303:36:528:447:40
8:58
#17147
25.2M
25.20 mi14:32:053:40:278:453:35
10:23
#17195
Finish
26.22 mi14:40:473:49:098:458:42
8:32
#17139
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi132803600360013422(Top 50%)3745(Top 33%)3745(Top 206%)
10K6.21 mi3.10 mi12538+7423180+4203180+42011913(Top 45%)2820(Top 25%)2820(Top 155%)
15K9.32 mi3.11 mi12848-3103365-1853365-18513422(Top 50%)3745(Top 33%)3745(Top 206%)
20K12.43 mi3.11 mi15327-24794886-15214886-152120550(Top 77%)7983(Top 70%)7983(Top 439%)
Half13.11 mi0.68 mi15497-1704997-1114997-11118616(Top 70%)6830(Top 60%)6830(Top 376%)
25K15.53 mi2.42 mi16194-6975452-4555452-45519241(Top 72%)7271(Top 64%)7271(Top 400%)
30K18.64 mi3.11 mi17049-8555993-5415993-54120082(Top 75%)7811(Top 68%)7811(Top 430%)
20M20.00 mi1.36 mi17117-686043-506043-5017800(Top 67%)6634(Top 58%)6634(Top 365%)
21M21.00 mi1.00 mi17372-2556218-1756218-17520218(Top 76%)8039(Top 70%)8039(Top 442%)
35K21.75 mi0.75 mi17331+416206+126206+1216499(Top 62%)5998(Top 53%)5998(Top 330%)
23M23.00 mi1.25 mi17312+196203+36203+316864(Top 63%)6214(Top 54%)6214(Top 342%)
24M24.00 mi1.00 mi17198+1146153+506153+5014807(Top 56%)5126(Top 45%)5126(Top 282%)
40K24.85 mi0.85 mi17147+516141+126141+1215997(Top 60%)5855(Top 51%)5855(Top 322%)
25.2M25.20 mi0.35 mi17195-486176-356176-3518762(Top 70%)7366(Top 64%)7366(Top 405%)
Finish26.22 mi1.02 mi17139+566150+266150+2615670(Top 59%)5638(Top 49%)5638(Top 310%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 50%
×21story building
+97ft-345ft

Overall

13422

Females

3745

F45-49

3745

5K→10K

3.1 - 6.2 mi

Top 45%
×5story building
+79ft-138ft

Overall

11913

Females

2820

F45-49

2820

10K→15K

6.2 - 9.3 mi

Top 50%
×3story building
+67ft-78ft

Overall

13422

Females

3745

F45-49

3745

15K→20K

9.3 - 12.4 mi

Top 77%
×5story building
+106ft-86ft

Overall

20550

Females

7983

F45-49

7983

20K→Half

12.4 - 13.1 mi

Top 70%
×2story building
+19ft-37ft

Overall

18616

Females

6830

F45-49

6830

Half→25K

13.1 - 15.5 mi

Top 72%
×4story building
+66ft-88ft

Overall

19241

Females

7271

F45-49

7271

25K→30K

15.5 - 18.6 mi

Top 75%
×9story building
+181ft-148ft

Overall

20082

Females

7811

F45-49

7811

30K→20M

18.6 - 20.0 mi

Top 67%
×5story building
+64ft-50ft

Overall

17800

Females

6634

F45-49

6634

20M→21M

20.0 - 21.0 mi

Top 76%
×8story building
+106ft-24ft

Overall

20218

Females

8039

F45-49

8039

21M→35K

21.0 - 21.8 mi

Top 62%
×7story building
+17ft-86ft

Overall

16499

Females

5998

F45-49

5998

35K→23M

21.8 - 23.0 mi

Top 63%
×5story building
+23ft-63ft

Overall

16864

Females

6214

F45-49

6214

23M→24M

23.0 - 24.0 mi

Top 56%
×6story building
+12ft-82ft

Overall

14807

Females

5126

F45-49

5126

24M→40K

24.0 - 24.9 mi

Top 60%
×1story
+6ft-20ft

Overall

15997

Females

5855

F45-49

5855

40K→25.2M

24.9 - 25.2 mi

Top 70%
×1story
+13ft-16ft

Overall

18762

Females

7366

F45-49

7366

25.2M→Finish

25.2 - 26.2 mi

Top 59%
×2story building
+22ft-21ft

Overall

15670

Females

5638

F45-49

5638

Passing Analysis

Category:
Athletes Passed
1593
Passed By
5452
Net Change
-3859
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#13280
5K → 10K83896+742#13280#12538
10K → 15K94404-310#12538#12848
15K → 20K92488-2479#12848#15327
20K → Half10180-170#15327#15497
Half → 25K35732-697#15497#16194
25K → 30K40895-855#16194#17049
30K → 20M56124-68#17049#17117
20M → 21M28283-255#17117#17372
21M → 35K7433+41#17372#17331
35K → 23M9071+19#17331#17312
23M → 24M13218+114#17312#17198
24M → 40K8130+51#17198#17147
40K → 25.2M1664-48#17147#17195
25.2M → Finish9034+56#17195#17139
TOTALS15935452-3859
📊

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