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BOSTON MARATHON 2023

Winnie Lai

ON

Bib: 18662 F

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Top 44%
Division (F45-49)
#0 / 1817
Race Day Weather
49°/39°F
light intensity drizzle

Race Timeline

Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
469 ft elev
5K· 3.11 mi
8:53/mi
27:36
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
8:38/mi
54:25
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
8:36/mi
1:21:07
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
8:39/mi
1:47:58
↑ 106↓ 860.1%
165 ft elev
Half· 13.11 mi
8:26/mi
1:53:43
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
8:41/mi
2:14:46
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
9:01/mi
2:42:46
↑ 181↓ 1480.2%
138 ft elev
20M
8:54/mi
2:54:52
↑ 64↓ 500.2%
148 ft elev
21M
9:11/mi
3:04:03
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
8:23/mi
3:10:19
↑ 17↓ 861.7%
156 ft elev
23M
8:42/mi
3:21:13
↑ 23↓ 630.6%
116 ft elev
24M
8:27/mi
3:29:40
↓ 821.3%
34 ft elev
40K· 24.85 mi
8:38/mi
3:37:03
↓ 200.3%
20 ft elev
25.2M
9:08/mi
3:40:12
↑ 13↓ 160.2%
18 ft elev
Finish· 26.22 mi
8:19/mi
3:48:41
↑ 22↓ 21
17 ft elev
Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent

The Course

Half Splits

1st Half· via Half
1:53:438:40 /mi⚡ faster
2nd Half
1:54:588:46 /mi+1.1%
Positive split — 1.1% slower in the second half
Is this your race?

Your race, unpacked

See your splits, ranks & AI insights.

Checkpoint Splits

CheckpointTimeAvg PaceSegment LengthSegment TimeSegment PaceTrendDiff
5K
27:368:533.11 mi27:36
8:53
-
10K
54:258:453.10 mi26:49
8:38
-0:15
15K
1:21:078:423.11 mi26:42
8:36
-0:02
20K
1:47:588:413.11 mi26:51
8:39
+0:03
Half(13.11 mi)
1:53:438:400.68 mi5:45
8:26
-0:13
25K
2:14:468:412.42 mi21:03
8:41
+0:15
30K
2:42:468:443.11 mi28:00
9:01
+0:20
20M
2:54:528:451.36 mi12:06
8:54
-0:07
21M
3:04:038:461.00 mi9:11
9:11
+0:17
35K
3:10:198:450.75 mi6:16
8:23
-0:48
23M
3:21:138:451.25 mi10:54
8:42
+0:19
24M
3:29:408:441.00 mi8:27
8:27
-0:15
40K
3:37:038:440.85 mi7:23
8:38
+0:11
25.2M
3:40:128:440.35 mi3:09
9:08
+0:30
Finish(26.22 mi)
3:48:418:441.02 mi8:29
8:19
-0:49
Trend:
Faster pace
Steady pace
Slower pace

Checkpoints & Pacing

Pace Line

Fastest Pace

8:19 /mi

Average Pace

8:44 /mi

Slowest Pace

9:11 /mi

Loading chart...
Fastest
Middle
Slowest
Average

Segments

Time at Faster Pace

3:39:30

96% of race

Time at Steady Pace

9:11

4% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:43 /mi

Loading chart...
Faster pace (< avg)
Steady pace (≈ avg)
Slower pace (> avg)

Heatmap

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0mi6.6mi13.1mi19.7mi26.2mi
Pace:
Faster
Steady
Slower

Checkpoint and Segment Rankings

CheckpointSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi19905774477441840467366736
10K3.10 mi19448+4577427+3177427+3171902070877087
15K3.11 mi19058+3907166+2617166+2611840467366736
20K3.11 mi18729+3296953+2136953+2131775763756375
Half(13.11 mi)0.68 mi18661+686909+446909+441735360996099
25K2.42 mi18425+2366782+1276782+1271729061636163
30K3.11 mi18169+2566671+1116671+1111724662106210
20M1.36 mi17989+1806583+886583+881605056065606
21M1.00 mi17757+2326443+1406443+1401443047354735
35K0.75 mi17645+1126390+536390+531464149234923
23M1.25 mi17453+1926294+966294+961445248894889
24M1.00 mi17324+1296221+736221+731422548114811
40K0.85 mi17185+1396164+576164+571420748694869
25.2M0.35 mi17134+516142+226142+221338644574457
Finish(26.22 mi)1.02 mi17022+1126092+506092+501429149034903

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 69%
×21story building
+97ft-345ft

Overall

18404

Females

6736

F45-49

6736

5K→10K

3.1 - 6.2 mi

Top 71%
×5story building
+79ft-138ft

Overall

19020

Females

7087

F45-49

7087

10K→15K

6.2 - 9.3 mi

Top 69%
×3story building
+67ft-78ft

Overall

18404

Females

6736

F45-49

6736

15K→20K

9.3 - 12.4 mi

Top 67%
×5story building
+106ft-86ft

Overall

17757

Females

6375

F45-49

6375

20K→Half

12.4 - 13.1 mi

Top 65%
×2story building
+19ft-37ft

Overall

17353

Females

6099

F45-49

6099

Half→25K

13.1 - 15.5 mi

Top 65%
×4story building
+66ft-88ft

Overall

17290

Females

6163

F45-49

6163

25K→30K

15.5 - 18.6 mi

Top 65%
×9story building
+181ft-148ft

Overall

17246

Females

6210

F45-49

6210

30K→20M

18.6 - 20.0 mi

Top 60%
×5story building
+64ft-50ft

Overall

16050

Females

5606

F45-49

5606

20M→21M

20.0 - 21.0 mi

Top 54%
×8story building
+106ft-24ft

Overall

14430

Females

4735

F45-49

4735

21M→35K

21.0 - 21.8 mi

Top 55%
×7story building
+17ft-86ft

Overall

14641

Females

4923

F45-49

4923

35K→23M

21.8 - 23.0 mi

Top 54%
×5story building
+23ft-63ft

Overall

14452

Females

4889

F45-49

4889

23M→24M

23.0 - 24.0 mi

Top 53%
×6story building
+12ft-82ft

Overall

14225

Females

4811

F45-49

4811

24M→40K

24.0 - 24.9 mi

Top 53%
×1story
+6ft-20ft

Overall

14207

Females

4869

F45-49

4869

40K→25.2M

24.9 - 25.2 mi

Top 50%
×1story
+13ft-16ft

Overall

13386

Females

4457

F45-49

4457

25.2M→Finish

25.2 - 26.2 mi

Top 54%
×2story building
+22ft-21ft

Overall

14291

Females

4903

F45-49

4903

Passing Analysis

Category:
Passed
3297
Passed By
414
Net Change
+2883
SegmentPassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#19905
5K → 10K599142+457#19905#19448
10K → 15K45060+390#19448#19058
15K → 20K36031+329#19058#18729
20K → Half702+68#18729#18661
Half → 25K26731+236#18661#18425
25K → 30K32266+256#18425#18169
30K → 20M19717+180#18169#17989
20M → 21M2386+232#17989#17757
21M → 35K1186+112#17757#17645
35K → 23M20513+192#17645#17453
23M → 24M1389+129#17453#17324
24M → 40K15011+139#17324#17185
40K → 25.2M532+51#17185#17134
25.2M → Finish13018+112#17134#17022
TOTALS3297414+2883

Passing Charts

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