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BOSTON MARATHON 2023

Karen Nitkin

Bib: 23578•F

MD

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Division (F55-59)
#0 / 815
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
8:55/mi
27:42
↑ 97↓ 3451.5%
10K· 6.21 mi
8:41/mi
54:41
↑ 79↓ 1380.4%
15K· 9.32 mi
8:51/mi
1:22:11
↑ 67↓ 78
20K· 12.43 mi
9:06/mi
1:50:28
↑ 106↓ 860.1%
Half· 13.11 mi
8:56/mi
1:56:34
↑ 19↓ 370.5%
25K· 15.53 mi
9:03/mi
2:18:30
↑ 66↓ 880.2%
30K· 18.64 mi
9:45/mi
2:48:48
↑ 181↓ 1480.2%
20M
10:20/mi
3:02:50
↑ 64↓ 500.2%
21M
11:19/mi
3:14:09
↑ 106↓ 241.6%
35K· 21.75 mi
9:31/mi
3:21:16
↑ 17↓ 861.7%
23M
10:11/mi
3:34:01
↑ 23↓ 630.6%
24M
10:03/mi
3:44:04
↓ 821.3%
40K· 24.85 mi
10:18/mi
3:52:52
↓ 200.3%
25.2M
11:01/mi
3:56:40
↑ 13↓ 160.2%
Finish· 26.22 mi
10:06/mi
4:06:58
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:56:34
Pace8:53 /mi
2nd Half
Distance13.11 mi
Time2:10:24
Pace9:57 /mi
📊Positive Split: 11.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:24:0827:428:5527:42
8:55
-
10K
6.21 mi11:51:0754:418:4826:59
8:41
-0:14
15K
9.32 mi12:18:371:22:118:4927:30
8:51
+0:10
20K
12.43 mi12:46:541:50:288:5328:17
9:06
+0:15
Half
13.11 mi12:53:001:56:348:536:06
8:56
-0:10
25K
15.53 mi13:14:562:18:308:5521:56
9:03
+0:07
30K
18.64 mi13:45:142:48:489:0330:18
9:45
+0:42
20M
20.00 mi13:59:163:02:509:0814:02
10:20
+0:35
21M
21.00 mi14:10:353:14:099:1511:19
11:19
+0:59
35K
21.75 mi14:17:423:21:169:157:07
9:31
-1:48
23M
23.00 mi14:30:273:34:019:1812:45
10:11
+0:40
24M
24.00 mi14:40:303:44:049:2010:03
10:03
-0:08
40K
24.85 mi14:49:183:52:529:228:48
10:18
+0:15
25.2M
25.20 mi14:53:063:56:409:233:48
11:01
+0:43
Finish
26.22 mi15:03:244:06:589:2610:18
10:06
-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

8:41 /mi

Average Pace

9:26 /mi

Slowest Pace

11:19 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:18:30

56% of race

Time at Steady Pace

57:46

23% of race

Time at Slower Pace

50:42

21% of race

Average Pace: 9:25 /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 mi11:24:0827:428:5527:42
8:55
#20064
10K
6.21 mi11:51:0754:418:4826:59
8:41
#19686
15K
9.32 mi12:18:371:22:118:4927:30
8:51
#19696
20K
12.43 mi12:46:541:50:288:5328:17
9:06
#19813
Half
13.11 mi12:53:001:56:348:536:06
8:56
#19816
25K
15.53 mi13:14:562:18:308:5521:56
9:03
#19708
30K
18.64 mi13:45:142:48:489:0330:18
9:45
#19856
20M
20.00 mi13:59:163:02:509:0814:02
10:20
#20009
21M
21.00 mi14:10:353:14:099:1511:19
11:19
#20141
35K
21.75 mi14:17:423:21:169:157:07
9:31
#20122
23M
23.00 mi14:30:273:34:019:1812:45
10:11
#20146
24M
24.00 mi14:40:303:44:049:2010:03
10:03
#20189
40K
24.85 mi14:49:183:52:529:228:48
10:18
#20213
25.2M
25.20 mi14:53:063:56:409:233:48
11:01
#20214
Finish
26.22 mi15:03:244:06:589:2610:18
10:06
#20262
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF55-59Seg. OverallSeg. FemalesSeg. F55-59
5K3.11 mi3.11 mi200647856785619810(Top 74%)7574(Top 66%)7574(Top 929%)
10K6.21 mi3.10 mi19686+3787579+2777579+27719350(Top 73%)7296(Top 64%)7296(Top 895%)
15K9.32 mi3.11 mi19696-107566+137566+1319810(Top 74%)7574(Top 66%)7574(Top 929%)
20K12.43 mi3.11 mi19813-1177609-437609-4320162(Top 76%)7755(Top 68%)7755(Top 952%)
Half13.11 mi0.68 mi19816-37609760920235(Top 76%)7806(Top 68%)7806(Top 958%)
25K15.53 mi2.42 mi19708+1087541+687541+6819201(Top 72%)7247(Top 63%)7247(Top 889%)
30K18.64 mi3.11 mi19856-1487650-1097650-10920309(Top 76%)7946(Top 70%)7946(Top 975%)
20M20.00 mi1.36 mi20009-1537750-1007750-10021337(Top 80%)8599(Top 75%)8599(Top 1055%)
21M21.00 mi1.00 mi20141-1327833-837833-8321520(Top 81%)8744(Top 77%)8744(Top 1073%)
35K21.75 mi0.75 mi20122+197829+47829+419915(Top 75%)7883(Top 69%)7883(Top 967%)
23M23.00 mi1.25 mi20146-247851-227851-2220527(Top 77%)8249(Top 72%)8249(Top 1012%)
24M24.00 mi1.00 mi20189-437887-367887-3620930(Top 79%)8500(Top 74%)8500(Top 1043%)
40K24.85 mi0.85 mi20213-247912-257912-2520728(Top 78%)8455(Top 74%)8455(Top 1037%)
25.2M25.20 mi0.35 mi20214-17916-47916-420533(Top 77%)8335(Top 73%)8335(Top 1023%)
Finish26.22 mi1.02 mi20262-487948-327948-3222056(Top 83%)9140(Top 80%)9140(Top 1121%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 74%
×21story building
+97ft-345ft

Overall

19810

Females

7574

F55-59

7574

5K→10K

3.1 - 6.2 mi

Top 73%
×5story building
+79ft-138ft

Overall

19350

Females

7296

F55-59

7296

10K→15K

6.2 - 9.3 mi

Top 74%
×3story building
+67ft-78ft

Overall

19810

Females

7574

F55-59

7574

15K→20K

9.3 - 12.4 mi

Top 76%
×5story building
+106ft-86ft

Overall

20162

Females

7755

F55-59

7755

20K→Half

12.4 - 13.1 mi

Top 76%
×2story building
+19ft-37ft

Overall

20235

Females

7806

F55-59

7806

Half→25K

13.1 - 15.5 mi

Top 72%
×4story building
+66ft-88ft

Overall

19201

Females

7247

F55-59

7247

25K→30K

15.5 - 18.6 mi

Top 76%
×9story building
+181ft-148ft

Overall

20309

Females

7946

F55-59

7946

30K→20M

18.6 - 20.0 mi

Top 80%
×5story building
+64ft-50ft

Overall

21337

Females

8599

F55-59

8599

20M→21M

20.0 - 21.0 mi

Top 81%
×8story building
+106ft-24ft

Overall

21520

Females

8744

F55-59

8744

21M→35K

21.0 - 21.8 mi

Top 75%
×7story building
+17ft-86ft

Overall

19915

Females

7883

F55-59

7883

35K→23M

21.8 - 23.0 mi

Top 77%
×5story building
+23ft-63ft

Overall

20527

Females

8249

F55-59

8249

23M→24M

23.0 - 24.0 mi

Top 79%
×6story building
+12ft-82ft

Overall

20930

Females

8500

F55-59

8500

24M→40K

24.0 - 24.9 mi

Top 78%
×1story
+6ft-20ft

Overall

20728

Females

8455

F55-59

8455

40K→25.2M

24.9 - 25.2 mi

Top 77%
×1story
+13ft-16ft

Overall

20533

Females

8335

F55-59

8335

25.2M→Finish

25.2 - 26.2 mi

Top 83%
×2story building
+22ft-21ft

Overall

22056

Females

9140

F55-59

9140

Passing Analysis

Category:
Athletes Passed
1464
Passed By
1662
Net Change
-198
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#20064
5K → 10K542164+378#20064#19686
10K → 15K175185-10#19686#19696
15K → 20K123240-117#19696#19813
20K → Half2629-3#19813#19816
Half → 25K17466+108#19816#19708
25K → 30K118266-148#19708#19856
30K → 20M39192-153#19856#20009
20M → 21M43175-132#20009#20141
21M → 35K4829+19#20141#20122
35K → 23M6892-24#20122#20146
23M → 24M3679-43#20146#20189
24M → 40K3054-24#20189#20213
40K → 25.2M1920-1#20213#20214
25.2M → Finish2371-48#20214#20262
TOTALS14641662-198
📊

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