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BOSTON MARATHON 2023

Cynthia Keith

Bib: 22359•F

MT

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Top 46%
Masters (Masters Women)
#0 / 6539
Top 35%
Division (F45-49)
#0 / 1817
Top 40%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
26:11
Rank: #17076
Start → 5K
26:11 | 8:26/mi
10K· 6.21 mi
51:45
Rank: #16707 (+369)
5K → 10K
25:34 | 8:14/mi
15K· 9.32 mi
1:17:32
Rank: #16647 (+60)
10K → 15K
25:47 | 8:18/mi
20K· 12.43 mi
1:43:21
Rank: #16407 (+240)
15K → 20K
25:49 | 8:19/mi
Half· 13.11 mi
1:48:59
Rank: #16388 (+19)
20K → Half
5:38 | 8:15/mi
25K· 15.53 mi
2:09:19
Rank: #16212 (+176)
Half → 25K
20:20 | 8:23/mi
30K· 18.64 mi
2:36:30
Rank: #16126 (+86)
25K → 30K
27:11 | 8:45/mi
20M
2:48:31
Rank: #16073 (+53)
30K → 20M
12:01 | 8:51/mi
21M
2:58:07
Rank: #16066 (+7)
20M → 21M
9:36 | 9:36/mi
35K· 21.75 mi
3:04:17
Rank: #15964 (+102)
21M → 35K
6:10 | 8:15/mi
23M
3:15:11
Rank: #15855 (+109)
35K → 23M
10:54 | 8:42/mi
24M
3:23:44
Rank: #15801 (+54)
23M → 24M
8:33 | 8:33/mi
40K· 24.85 mi
3:31:00
Rank: #15701 (+100)
24M → 40K
7:16 | 8:30/mi
25.2M
3:34:07
Rank: #15655 (+46)
40K → 25.2M
3:07 | 9:02/mi
Finish· 26.22 mi
3:42:33
Rank: #15579 (+76)
25.2M → Finish
8:26 | 8:17/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:48:59
Pace8:19 /mi
2nd Half
Distance13.11 mi
Time1:53:34
Pace8:40 /mi
📊Positive Split: 4.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:20:1226:118:2626:11
8:26
-
10K
6.21 mi11:45:4651:458:2025:34
8:14
-0:12
15K
9.32 mi12:11:331:17:328:1925:47
8:18
+0:04
20K
12.43 mi12:37:221:43:218:1925:49
8:19
+0:01
Half
13.11 mi12:43:001:48:598:195:38
8:15
-0:04
25K
15.53 mi13:03:202:09:198:1920:20
8:23
+0:08
30K
18.64 mi13:30:312:36:308:2427:11
8:45
+0:22
20M
20.00 mi13:42:322:48:318:2612:01
8:51
+0:06
21M
21.00 mi13:52:082:58:078:299:36
9:36
+0:45
35K
21.75 mi13:58:183:04:178:286:10
8:15
-1:21
23M
23.00 mi14:09:123:15:118:2910:54
8:42
+0:27
24M
24.00 mi14:17:453:23:448:298:33
8:33
-0:09
40K
24.85 mi14:25:013:31:008:297:16
8:30
-0:03
25.2M
25.20 mi14:28:083:34:078:303:07
9:02
+0:32
Finish
26.22 mi14:36:343:42:338:308:26
8:17
-0:45

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

8:14 /mi

Average Pace

8:30 /mi

Slowest Pace

9:36 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:32:57

96% of race

Time at Steady Pace

9:36

4% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:29 /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 mi11:20:1226:118:2626:11
8:26
#17076
10K
6.21 mi11:45:4651:458:2025:34
8:14
#16707
15K
9.32 mi12:11:331:17:328:1925:47
8:18
#16647
20K
12.43 mi12:37:221:43:218:1925:49
8:19
#16407
Half
13.11 mi12:43:001:48:598:195:38
8:15
#16388
25K
15.53 mi13:03:202:09:198:1920:20
8:23
#16212
30K
18.64 mi13:30:312:36:308:2427:11
8:45
#16126
20M
20.00 mi13:42:322:48:318:2612:01
8:51
#16073
21M
21.00 mi13:52:082:58:078:299:36
9:36
#16066
35K
21.75 mi13:58:183:04:178:286:10
8:15
#15964
23M
23.00 mi14:09:123:15:118:2910:54
8:42
#15855
24M
24.00 mi14:17:453:23:448:298:33
8:33
#15801
40K
24.85 mi14:25:013:31:008:297:16
8:30
#15701
25.2M
25.20 mi14:28:083:34:078:303:07
9:02
#15655
Finish
26.22 mi14:36:343:42:338:308:26
8:17
#15579
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi170765979597916530(Top 62%)5609(Top 49%)5609(Top 309%)
10K6.21 mi3.10 mi16707+3695713+2665713+26616463(Top 62%)5553(Top 49%)5553(Top 306%)
15K9.32 mi3.11 mi16647+605693+205693+2016530(Top 62%)5609(Top 49%)5609(Top 309%)
20K12.43 mi3.11 mi16407+2405557+1365557+13615668(Top 59%)5140(Top 45%)5140(Top 283%)
Half13.11 mi0.68 mi16388+195543+145543+1416238(Top 61%)5439(Top 48%)5439(Top 299%)
25K15.53 mi2.42 mi16212+1765462+815462+8115507(Top 58%)5145(Top 45%)5145(Top 283%)
30K18.64 mi3.11 mi16126+865454+85454+815776(Top 59%)5367(Top 47%)5367(Top 295%)
20M20.00 mi1.36 mi16073+535438+165438+1615679(Top 59%)5378(Top 47%)5378(Top 296%)
21M21.00 mi1.00 mi16066+75453-155453-1516432(Top 62%)5871(Top 51%)5871(Top 323%)
35K21.75 mi0.75 mi15964+1025412+415412+4113811(Top 52%)4474(Top 39%)4474(Top 246%)
23M23.00 mi1.25 mi15855+1095370+425370+4214441(Top 54%)4878(Top 43%)4878(Top 268%)
24M24.00 mi1.00 mi15801+545361+95361+914796(Top 56%)5115(Top 45%)5115(Top 282%)
40K24.85 mi0.85 mi15701+1005306+555306+5513377(Top 50%)4413(Top 39%)4413(Top 243%)
25.2M25.20 mi0.35 mi15655+465277+295277+2912835(Top 48%)4168(Top 36%)4168(Top 229%)
Finish26.22 mi1.02 mi15579+765251+265251+2613986(Top 53%)4737(Top 41%)4737(Top 261%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 62%
×21stories
+97ft-345ft

Overall

16530

Females

5609

F45-49

5609

5K→10K

3.1 - 6.2 mi

Top 62%
×5stories
+79ft-138ft

Overall

16463

Females

5553

F45-49

5553

10K→15K

6.2 - 9.3 mi

Top 62%
×3stories
+67ft-78ft

Overall

16530

Females

5609

F45-49

5609

15K→20K

9.3 - 12.4 mi

Top 59%
×5stories
+106ft-86ft

Overall

15668

Females

5140

F45-49

5140

20K→Half

12.4 - 13.1 mi

Top 61%
×2stories
+19ft-37ft

Overall

16238

Females

5439

F45-49

5439

Half→25K

13.1 - 15.5 mi

Top 58%
×4stories
+66ft-88ft

Overall

15507

Females

5145

F45-49

5145

25K→30K

15.5 - 18.6 mi

Top 59%
×9stories
+181ft-148ft

Overall

15776

Females

5367

F45-49

5367

30K→20M

18.6 - 20.0 mi

Top 59%
×5stories
+64ft-50ft

Overall

15679

Females

5378

F45-49

5378

20M→21M

20.0 - 21.0 mi

Top 62%
×8stories
+106ft-24ft

Overall

16432

Females

5871

F45-49

5871

21M→35K

21.0 - 21.8 mi

Top 52%
×7stories
+17ft-86ft

Overall

13811

Females

4474

F45-49

4474

35K→23M

21.8 - 23.0 mi

Top 54%
×5stories
+23ft-63ft

Overall

14441

Females

4878

F45-49

4878

23M→24M

23.0 - 24.0 mi

Top 56%
×6stories
+12ft-82ft

Overall

14796

Females

5115

F45-49

5115

24M→40K

24.0 - 24.9 mi

Top 50%
×1story
+6ft-20ft

Overall

13377

Females

4413

F45-49

4413

40K→25.2M

24.9 - 25.2 mi

Top 48%
×1story
+13ft-16ft

Overall

12835

Females

4168

F45-49

4168

25.2M→Finish

25.2 - 26.2 mi

Top 53%
×2stories
+22ft-21ft

Overall

13986

Females

4737

F45-49

4737

Passing Analysis

Category:
Athletes Passed
2375
Passed By
878
Net Change
+1497
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#17076
5K → 10K528159+369#17076#16707
10K → 15K241181+60#16707#16647
15K → 20K29757+240#16647#16407
20K → Half4324+19#16407#16388
Half → 25K23357+176#16388#16212
25K → 30K225139+86#16212#16126
30K → 20M9946+53#16126#16073
20M → 21M8376+7#16073#16066
21M → 35K11210+102#16066#15964
35K → 23M14738+109#15964#15855
23M → 24M10147+54#15855#15801
24M → 40K11212+100#15801#15701
40K → 25.2M559+46#15701#15655
25.2M → Finish9923+76#15655#15579
TOTALS2375878+1497
📊

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