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BOSTON MARATHON 2023

Karen Marshall

Bib: 17082•F

0:00
0:00
/ mi
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Top 49%
Division (F18-39)
#0 / 4884
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
26:26
Rank: #17608
Start → 5K
26:26 | 8:30/mi
10K· 6.21 mi
52:08
Rank: #17147 (+461)
5K → 10K
25:42 | 8:16/mi
15K· 9.32 mi
1:17:24
Rank: #16551 (+596)
10K → 15K
25:16 | 8:08/mi
20K· 12.43 mi
1:43:16
Rank: #16361 (+190)
15K → 20K
25:52 | 8:20/mi
Half· 13.11 mi
1:48:52
Rank: #16320 (+41)
20K → Half
5:36 | 8:12/mi
25K· 15.53 mi
2:09:20
Rank: #16227 (+93)
Half → 25K
20:28 | 8:26/mi
30K· 18.64 mi
2:36:39
Rank: #16182 (+45)
25K → 30K
27:19 | 8:48/mi
20M
2:50:15
Rank: #16617 (-435)
30K → 20M
13:36 | 10:00/mi
21M
2:59:18
Rank: #16415 (+202)
20M → 21M
9:03 | 9:03/mi
35K· 21.75 mi
3:05:53
Rank: #16436 (-21)
21M → 35K
6:35 | 8:48/mi
23M
3:17:07
Rank: #16392 (+44)
35K → 23M
11:14 | 8:58/mi
24M
3:25:50
Rank: #16358 (+34)
23M → 24M
8:43 | 8:43/mi
40K· 24.85 mi
3:33:24
Rank: #16291 (+67)
24M → 40K
7:34 | 8:51/mi
25.2M
3:36:32
Rank: #16236 (+55)
40K → 25.2M
3:08 | 9:05/mi
Finish· 26.22 mi
3:44:54
Rank: #16151 (+85)
25.2M → Finish
8:22 | 8:13/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:48:52
Pace8:18 /mi
2nd Half
Distance13.11 mi
Time1:56:02
Pace8:51 /mi
📊Positive Split: 6.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:17:5326:268:3026:26
8:30
-
10K
6.21 mi11:43:3552:088:2325:42
8:16
-0:14
15K
9.32 mi12:08:511:17:248:1825:16
8:08
-0:08
20K
12.43 mi12:34:431:43:168:1925:52
8:20
+0:12
Half
13.11 mi12:40:191:48:528:185:36
8:12
-0:08
25K
15.53 mi13:00:472:09:208:2020:28
8:26
+0:14
30K
18.64 mi13:28:062:36:398:2427:19
8:48
+0:22
20M
20.00 mi13:41:422:50:158:3113:36
10:00
+1:12
21M
21.00 mi13:50:452:59:188:329:03
9:03
-0:57
35K
21.75 mi13:57:203:05:538:336:35
8:48
-0:15
23M
23.00 mi14:08:343:17:078:3411:14
8:58
+0:10
24M
24.00 mi14:17:173:25:508:358:43
8:43
-0:15
40K
24.85 mi14:24:513:33:248:357:34
8:51
+0:08
25.2M
25.20 mi14:27:593:36:328:363:08
9:05
+0:14
Finish
26.22 mi14:36:213:44:548:358:22
8:13
-0:52

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

8:08 /mi

Average Pace

8:35 /mi

Slowest Pace

10:00 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:51:16

49% of race

Time at Steady Pace

1:16:37

34% of race

Time at Slower Pace

37:01

16% of race

Average Pace: 8:35 /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 mi11:17:5326:268:3026:26
8:30
#17608
10K
6.21 mi11:43:3552:088:2325:42
8:16
#17147
15K
9.32 mi12:08:511:17:248:1825:16
8:08
#16551
20K
12.43 mi12:34:431:43:168:1925:52
8:20
#16361
Half
13.11 mi12:40:191:48:528:185:36
8:12
#16320
25K
15.53 mi13:00:472:09:208:2020:28
8:26
#16227
30K
18.64 mi13:28:062:36:398:2427:19
8:48
#16182
20M
20.00 mi13:41:422:50:158:3113:36
10:00
#16617
21M
21.00 mi13:50:452:59:188:329:03
9:03
#16415
35K
21.75 mi13:57:203:05:538:336:35
8:48
#16436
23M
23.00 mi14:08:343:17:078:3411:14
8:58
#16392
24M
24.00 mi14:17:173:25:508:358:43
8:43
#16358
40K
24.85 mi14:24:513:33:248:357:34
8:51
#16291
25.2M
25.20 mi14:27:593:36:328:363:08
9:05
#16236
Finish
26.22 mi14:36:213:44:548:358:22
8:13
#16151
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi176086321632115398(Top 58%)4912(Top 43%)4912(Top 101%)
10K6.21 mi3.10 mi17147+4616019+3026019+30216739(Top 63%)5711(Top 50%)5711(Top 117%)
15K9.32 mi3.11 mi16551+5965632+3875632+38715398(Top 58%)4912(Top 43%)4912(Top 101%)
20K12.43 mi3.11 mi16361+1905530+1025530+10215783(Top 59%)5218(Top 46%)5218(Top 107%)
Half13.11 mi0.68 mi16320+415504+265504+2615924(Top 60%)5256(Top 46%)5256(Top 108%)
25K15.53 mi2.42 mi16227+935473+315473+3115865(Top 60%)5361(Top 47%)5361(Top 110%)
30K18.64 mi3.11 mi16182+455490-175490-1716014(Top 60%)5507(Top 48%)5507(Top 113%)
20M20.00 mi1.36 mi16617-4355766-2765766-27620507(Top 77%)8134(Top 71%)8134(Top 167%)
21M21.00 mi1.00 mi16415+2025657+1095657+10913728(Top 52%)4352(Top 38%)4352(Top 89%)
35K21.75 mi0.75 mi16436-215679-225679-2216948(Top 64%)6242(Top 55%)6242(Top 128%)
23M23.00 mi1.25 mi16392+445666+135666+1315936(Top 60%)5706(Top 50%)5706(Top 117%)
24M24.00 mi1.00 mi16358+345664+25664+215769(Top 59%)5682(Top 50%)5682(Top 116%)
40K24.85 mi0.85 mi16291+675648+165648+1615385(Top 58%)5517(Top 48%)5517(Top 113%)
25.2M25.20 mi0.35 mi16236+555621+275621+2713106(Top 49%)4304(Top 38%)4304(Top 88%)
Finish26.22 mi1.02 mi16151+855580+415580+4113552(Top 51%)4507(Top 39%)4507(Top 92%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 58%
×21stories
+97ft-345ft

Overall

15398

Females

4912

F18-39

4912

5K→10K

3.1 - 6.2 mi

Top 63%
×5stories
+79ft-138ft

Overall

16739

Females

5711

F18-39

5711

10K→15K

6.2 - 9.3 mi

Top 58%
×3stories
+67ft-78ft

Overall

15398

Females

4912

F18-39

4912

15K→20K

9.3 - 12.4 mi

Top 59%
×5stories
+106ft-86ft

Overall

15783

Females

5218

F18-39

5218

20K→Half

12.4 - 13.1 mi

Top 60%
×2stories
+19ft-37ft

Overall

15924

Females

5256

F18-39

5256

Half→25K

13.1 - 15.5 mi

Top 60%
×4stories
+66ft-88ft

Overall

15865

Females

5361

F18-39

5361

25K→30K

15.5 - 18.6 mi

Top 60%
×9stories
+181ft-148ft

Overall

16014

Females

5507

F18-39

5507

30K→20M

18.6 - 20.0 mi

Top 77%
×5stories
+64ft-50ft

Overall

20507

Females

8134

F18-39

8134

20M→21M

20.0 - 21.0 mi

Top 52%
×8stories
+106ft-24ft

Overall

13728

Females

4352

F18-39

4352

21M→35K

21.0 - 21.8 mi

Top 64%
×7stories
+17ft-86ft

Overall

16948

Females

6242

F18-39

6242

35K→23M

21.8 - 23.0 mi

Top 60%
×5stories
+23ft-63ft

Overall

15936

Females

5706

F18-39

5706

23M→24M

23.0 - 24.0 mi

Top 59%
×6stories
+12ft-82ft

Overall

15769

Females

5682

F18-39

5682

24M→40K

24.0 - 24.9 mi

Top 58%
×1story
+6ft-20ft

Overall

15385

Females

5517

F18-39

5517

40K→25.2M

24.9 - 25.2 mi

Top 49%
×1story
+13ft-16ft

Overall

13106

Females

4304

F18-39

4304

25.2M→Finish

25.2 - 26.2 mi

Top 51%
×2stories
+22ft-21ft

Overall

13552

Females

4507

F18-39

4507

Passing Analysis

Category:
Athletes Passed
2702
Passed By
1245
Net Change
+1457
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#17608
5K → 10K617156+461#17608#17147
10K → 15K63640+596#17147#16551
15K → 20K26575+190#16551#16361
20K → Half6019+41#16361#16320
Half → 25K18289+93#16320#16227
25K → 30K207162+45#16227#16182
30K → 20M19454-435#16182#16617
20M → 21M21210+202#16617#16415
21M → 35K4162-21#16415#16436
35K → 23M10056+44#16436#16392
23M → 24M8349+34#16392#16358
24M → 40K10639+67#16358#16291
40K → 25.2M605+55#16291#16236
25.2M → Finish11429+85#16236#16151
TOTALS27021245+1457
📊

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