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BOSTON MARATHON 2023

C Stephenson-Lake

Bib: 21139•F

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0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Top 46%
Division (F45-49)
#0 / 1817
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
25:52
Rank: #16334
Start → 5K
25:52 | 8:20/mi
10K· 6.21 mi
52:01
Rank: #17005 (-671)
5K → 10K
26:09 | 8:25/mi
15K· 9.32 mi
1:18:01
Rank: #16993 (+12)
10K → 15K
26:00 | 8:22/mi
20K· 12.43 mi
1:45:08
Rank: #17323 (-330)
15K → 20K
27:07 | 8:44/mi
Half· 13.11 mi
1:50:50
Rank: #17290 (+33)
20K → Half
5:42 | 8:21/mi
25K· 15.53 mi
2:11:51
Rank: #17251 (+39)
Half → 25K
21:01 | 8:40/mi
30K· 18.64 mi
2:40:25
Rank: #17397 (-146)
25K → 30K
28:34 | 9:12/mi
20M
2:52:54
Rank: #17385 (+12)
30K → 20M
12:29 | 9:11/mi
21M
3:02:48
Rank: #17410 (-25)
20M → 21M
9:54 | 9:54/mi
35K· 21.75 mi
3:09:09
Rank: #17322 (+88)
21M → 35K
6:21 | 8:29/mi
23M
3:20:28
Rank: #17266 (+56)
35K → 23M
11:19 | 9:02/mi
24M
3:29:31
Rank: #17272 (-6)
23M → 24M
9:03 | 9:03/mi
40K· 24.85 mi
3:37:17
Rank: #17242 (+30)
24M → 40K
7:46 | 9:05/mi
25.2M
3:40:41
Rank: #17245 (-3)
40K → 25.2M
3:24 | 9:52/mi
Finish· 26.22 mi
3:49:48
Rank: #17300 (-55)
25.2M → Finish
9:07 | 8:57/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:50:50
Pace8:27 /mi
2nd Half
Distance13.11 mi
Time1:58:58
Pace9:05 /mi
📊Positive Split: 7.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:19:0825:528:2025:52
8:20
-
10K
6.21 mi11:45:1752:018:2226:09
8:25
+0:05
15K
9.32 mi12:11:171:18:018:2226:00
8:22
-0:03
20K
12.43 mi12:38:241:45:088:2827:07
8:44
+0:22
Half
13.11 mi12:44:061:50:508:275:42
8:21
-0:23
25K
15.53 mi13:05:072:11:518:2921:01
8:40
+0:19
30K
18.64 mi13:33:412:40:258:3628:34
9:12
+0:32
20M
20.00 mi13:46:102:52:548:3912:29
9:11
-0:01
21M
21.00 mi13:56:043:02:488:429:54
9:54
+0:43
35K
21.75 mi14:02:253:09:098:426:21
8:29
-1:25
23M
23.00 mi14:13:443:20:288:4311:19
9:02
+0:33
24M
24.00 mi14:22:473:29:318:449:03
9:03
+0:01
40K
24.85 mi14:30:333:37:178:457:46
9:05
+0:02
25.2M
25.20 mi14:33:573:40:418:453:24
9:52
+0:47
Finish
26.22 mi14:43:043:49:488:469:07
8:57
-0:55

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

8:20 /mi

Average Pace

8:46 /mi

Slowest Pace

9:54 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:55:27

76% of race

Time at Steady Pace

41:03

18% of race

Time at Slower Pace

13:18

6% of race

Average Pace: 8:46 /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 mi11:19:0825:528:2025:52
8:20
#16334
10K
6.21 mi11:45:1752:018:2226:09
8:25
#17005
15K
9.32 mi12:11:171:18:018:2226:00
8:22
#16993
20K
12.43 mi12:38:241:45:088:2827:07
8:44
#17323
Half
13.11 mi12:44:061:50:508:275:42
8:21
#17290
25K
15.53 mi13:05:072:11:518:2921:01
8:40
#17251
30K
18.64 mi13:33:412:40:258:3628:34
9:12
#17397
20M
20.00 mi13:46:102:52:548:3912:29
9:11
#17385
21M
21.00 mi13:56:043:02:488:429:54
9:54
#17410
35K
21.75 mi14:02:253:09:098:426:21
8:29
#17322
23M
23.00 mi14:13:443:20:288:4311:19
9:02
#17266
24M
24.00 mi14:22:473:29:318:449:03
9:03
#17272
40K
24.85 mi14:30:333:37:178:457:46
9:05
#17242
25.2M
25.20 mi14:33:573:40:418:453:24
9:52
#17245
Finish
26.22 mi14:43:043:49:488:469:07
8:57
#17300
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi163345490549016976(Top 64%)5897(Top 52%)5897(Top 325%)
10K6.21 mi3.10 mi17005-6715919-4295919-42917687(Top 66%)6299(Top 55%)6299(Top 347%)
15K9.32 mi3.11 mi16993+125904+155904+1516976(Top 64%)5897(Top 52%)5897(Top 325%)
20K12.43 mi3.11 mi17323-3306122-2186122-21818295(Top 69%)6668(Top 58%)6668(Top 367%)
Half13.11 mi0.68 mi17290+336099+236099+2316916(Top 64%)5862(Top 51%)5862(Top 323%)
25K15.53 mi2.42 mi17251+396088+116088+1117219(Top 65%)6128(Top 54%)6128(Top 337%)
30K18.64 mi3.11 mi17397-1466187-996187-9918144(Top 68%)6729(Top 59%)6729(Top 370%)
20M20.00 mi1.36 mi17385+126209-226209-2217491(Top 66%)6444(Top 56%)6444(Top 355%)
21M21.00 mi1.00 mi17410-256239-306239-3017664(Top 66%)6563(Top 57%)6563(Top 361%)
35K21.75 mi0.75 mi17322+886200+396200+3915310(Top 58%)5314(Top 47%)5314(Top 292%)
23M23.00 mi1.25 mi17266+566178+226178+2216269(Top 61%)5896(Top 52%)5896(Top 324%)
24M24.00 mi1.00 mi17272-66187-96187-917465(Top 66%)6613(Top 58%)6613(Top 364%)
40K24.85 mi0.85 mi17242+306195-86195-816583(Top 62%)6173(Top 54%)6173(Top 340%)
25.2M25.20 mi0.35 mi17245-36205-106205-1016856(Top 63%)6347(Top 56%)6347(Top 349%)
Finish26.22 mi1.02 mi17300-556241-366241-3617722(Top 67%)6766(Top 59%)6766(Top 372%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 64%
×21stories
+97ft-345ft

Overall

16976

Females

5897

F45-49

5897

5K→10K

3.1 - 6.2 mi

Top 66%
×5stories
+79ft-138ft

Overall

17687

Females

6299

F45-49

6299

10K→15K

6.2 - 9.3 mi

Top 64%
×3stories
+67ft-78ft

Overall

16976

Females

5897

F45-49

5897

15K→20K

9.3 - 12.4 mi

Top 69%
×5stories
+106ft-86ft

Overall

18295

Females

6668

F45-49

6668

20K→Half

12.4 - 13.1 mi

Top 64%
×2stories
+19ft-37ft

Overall

16916

Females

5862

F45-49

5862

Half→25K

13.1 - 15.5 mi

Top 65%
×4stories
+66ft-88ft

Overall

17219

Females

6128

F45-49

6128

25K→30K

15.5 - 18.6 mi

Top 68%
×9stories
+181ft-148ft

Overall

18144

Females

6729

F45-49

6729

30K→20M

18.6 - 20.0 mi

Top 66%
×5stories
+64ft-50ft

Overall

17491

Females

6444

F45-49

6444

20M→21M

20.0 - 21.0 mi

Top 66%
×8stories
+106ft-24ft

Overall

17664

Females

6563

F45-49

6563

21M→35K

21.0 - 21.8 mi

Top 58%
×7stories
+17ft-86ft

Overall

15310

Females

5314

F45-49

5314

35K→23M

21.8 - 23.0 mi

Top 61%
×5stories
+23ft-63ft

Overall

16269

Females

5896

F45-49

5896

23M→24M

23.0 - 24.0 mi

Top 66%
×6stories
+12ft-82ft

Overall

17465

Females

6613

F45-49

6613

24M→40K

24.0 - 24.9 mi

Top 62%
×1story
+6ft-20ft

Overall

16583

Females

6173

F45-49

6173

40K→25.2M

24.9 - 25.2 mi

Top 63%
×1story
+13ft-16ft

Overall

16856

Females

6347

F45-49

6347

25.2M→Finish

25.2 - 26.2 mi

Top 67%
×2stories
+22ft-21ft

Overall

17722

Females

6766

F45-49

6766

Passing Analysis

Category:
Athletes Passed
1282
Passed By
2248
Net Change
-966
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#16334
5K → 10K91762-671#16334#17005
10K → 15K209197+12#17005#16993
15K → 20K92422-330#16993#17323
20K → Half4916+33#17323#17290
Half → 25K140101+39#17290#17251
25K → 30K118264-146#17251#17397
30K → 20M9482+12#17397#17385
20M → 21M75100-25#17385#17410
21M → 35K10113+88#17410#17322
35K → 23M10650+56#17322#17266
23M → 24M6470-6#17266#17272
24M → 40K8252+30#17272#17242
40K → 25.2M2023-3#17242#17245
25.2M → Finish4196-55#17245#17300
TOTALS12822248-966
📊

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