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BOSTON MARATHON 2023

Karen Stellhorn

Bib: 22529•F

FL

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 40%
Gender (Female)
#0 / 11423
Top 21%
Masters (Masters Women)
#0 / 6539
Top 9%
Division (F55-59)
#0 / 815
Top 3%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
24:41
Rank: #13615
Start → 5K
24:41 | 7:57/mi
10K· 6.21 mi
48:00
Rank: #12058 (+1557)
5K → 10K
23:19 | 7:30/mi
15K· 9.32 mi
1:11:34
Rank: #11595 (+463)
10K → 15K
23:34 | 7:35/mi
20K· 12.43 mi
1:35:07
Rank: #11144 (+451)
15K → 20K
23:33 | 7:35/mi
Half· 13.11 mi
1:40:11
Rank: #11060 (+84)
20K → Half
5:04 | 7:26/mi
25K· 15.53 mi
1:58:35
Rank: #10764 (+296)
Half → 25K
18:24 | 7:35/mi
30K· 18.64 mi
2:24:24
Rank: #11146 (-382)
25K → 30K
25:49 | 8:19/mi
20M
2:35:09
Rank: #10995 (+151)
30K → 20M
10:45 | 7:55/mi
21M
2:43:47
Rank: #10996 (-1)
20M → 21M
8:38 | 8:38/mi
35K· 21.75 mi
2:49:25
Rank: #10896 (+100)
21M → 35K
5:38 | 7:32/mi
23M
2:59:24
Rank: #10803 (+93)
35K → 23M
9:59 | 7:58/mi
24M
3:07:05
Rank: #10706 (+97)
23M → 24M
7:41 | 7:41/mi
40K· 24.85 mi
3:13:52
Rank: #10629 (+77)
24M → 40K
6:47 | 7:56/mi
25.2M
3:16:52
Rank: #10623 (+6)
40K → 25.2M
3:00 | 8:42/mi
Finish· 26.22 mi
3:24:59
Rank: #10641 (-18)
25.2M → Finish
8:07 | 7:58/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:40:11
Pace7:39 /mi
2nd Half
Distance13.11 mi
Time1:44:48
Pace8:00 /mi
📊Positive Split: 4.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:17:5524:417:5724:41
7:57
-
10K
6.21 mi11:41:1448:007:4323:19
7:30
-0:27
15K
9.32 mi12:04:481:11:347:4123:34
7:35
+0:05
20K
12.43 mi12:28:211:35:077:3923:33
7:35
0:00
Half
13.11 mi12:33:251:40:117:395:04
7:26
-0:09
25K
15.53 mi12:51:491:58:357:3818:24
7:35
+0:09
30K
18.64 mi13:17:382:24:247:4525:49
8:19
+0:44
20M
20.00 mi13:28:232:35:097:4510:45
7:55
-0:24
21M
21.00 mi13:37:012:43:477:488:38
8:38
+0:43
35K
21.75 mi13:42:392:49:257:475:38
7:32
-1:06
23M
23.00 mi13:52:382:59:247:489:59
7:58
+0:26
24M
24.00 mi14:00:193:07:057:487:41
7:41
-0:17
40K
24.85 mi14:07:063:13:527:486:47
7:56
+0:15
25.2M
25.20 mi14:10:063:16:527:493:00
8:42
+0:46
Finish
26.22 mi14:18:133:24:597:498:07
7:58
-0:44

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

7:26 /mi

Average Pace

7:49 /mi

Slowest Pace

8:42 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:47:32

82% of race

Time at Steady Pace

37:27

18% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:49 /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 mi11:17:5524:417:5724:41
7:57
#13615
10K
6.21 mi11:41:1448:007:4323:19
7:30
#12058
15K
9.32 mi12:04:481:11:347:4123:34
7:35
#11595
20K
12.43 mi12:28:211:35:077:3923:33
7:35
#11144
Half
13.11 mi12:33:251:40:117:395:04
7:26
#11060
25K
15.53 mi12:51:491:58:357:3818:24
7:35
#10764
30K
18.64 mi13:17:382:24:247:4525:49
8:19
#11146
20M
20.00 mi13:28:232:35:097:4510:45
7:55
#10995
21M
21.00 mi13:37:012:43:477:488:38
8:38
#10996
35K
21.75 mi13:42:392:49:257:475:38
7:32
#10896
23M
23.00 mi13:52:382:59:247:489:59
7:58
#10803
24M
24.00 mi14:00:193:07:057:487:41
7:41
#10706
40K
24.85 mi14:07:063:13:527:486:47
7:56
#10629
25.2M
25.20 mi14:10:063:16:527:493:00
8:42
#10623
Finish
26.22 mi14:18:133:24:597:498:07
7:58
#10641
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF55-59Seg. OverallSeg. FemalesSeg. F55-59
5K3.11 mi3.11 mi136153789378910898(Top 41%)2284(Top 20%)2284(Top 280%)
10K6.21 mi3.10 mi12058+15572891+8982891+89810501(Top 39%)2058(Top 18%)2058(Top 253%)
15K9.32 mi3.11 mi11595+4632658+2332658+23310898(Top 41%)2284(Top 20%)2284(Top 280%)
20K12.43 mi3.11 mi11144+4512404+2542404+2549956(Top 37%)1896(Top 17%)1896(Top 233%)
Half13.11 mi0.68 mi11060+842362+422362+429705(Top 36%)1776(Top 16%)1776(Top 218%)
25K15.53 mi2.42 mi10764+2962233+1292233+1299482(Top 36%)1773(Top 16%)1773(Top 218%)
30K18.64 mi3.11 mi11146-3822492-2592492-25913091(Top 49%)3803(Top 33%)3803(Top 467%)
20M20.00 mi1.36 mi10995+1512427+652427+659658(Top 36%)2093(Top 18%)2093(Top 257%)
21M21.00 mi1.00 mi10996-12459-322459-3211266(Top 42%)3005(Top 26%)3005(Top 369%)
35K21.75 mi0.75 mi10896+1002424+352424+358811(Top 33%)1844(Top 16%)1844(Top 226%)
23M23.00 mi1.25 mi10803+932407+172407+179590(Top 36%)2300(Top 20%)2300(Top 282%)
24M24.00 mi1.00 mi10706+972381+262381+269017(Top 34%)2111(Top 18%)2111(Top 259%)
40K24.85 mi0.85 mi10629+772374+72374+79616(Top 36%)2461(Top 22%)2461(Top 302%)
25.2M25.20 mi0.35 mi10623+62382-82382-810796(Top 41%)3070(Top 27%)3070(Top 377%)
Finish26.22 mi1.02 mi10641-182408-262408-2611877(Top 45%)3634(Top 32%)3634(Top 446%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 41%
×21stories
+97ft-345ft

Overall

10898

Females

2284

F55-59

2284

5K→10K

3.1 - 6.2 mi

Top 39%
×5stories
+79ft-138ft

Overall

10501

Females

2058

F55-59

2058

10K→15K

6.2 - 9.3 mi

Top 41%
×3stories
+67ft-78ft

Overall

10898

Females

2284

F55-59

2284

15K→20K

9.3 - 12.4 mi

Top 37%
×5stories
+106ft-86ft

Overall

9956

Females

1896

F55-59

1896

20K→Half

12.4 - 13.1 mi

Top 36%
×2stories
+19ft-37ft

Overall

9705

Females

1776

F55-59

1776

Half→25K

13.1 - 15.5 mi

Top 36%
×4stories
+66ft-88ft

Overall

9482

Females

1773

F55-59

1773

25K→30K

15.5 - 18.6 mi

Top 49%
×9stories
+181ft-148ft

Overall

13091

Females

3803

F55-59

3803

30K→20M

18.6 - 20.0 mi

Top 36%
×5stories
+64ft-50ft

Overall

9658

Females

2093

F55-59

2093

20M→21M

20.0 - 21.0 mi

Top 42%
×8stories
+106ft-24ft

Overall

11266

Females

3005

F55-59

3005

21M→35K

21.0 - 21.8 mi

Top 33%
×7stories
+17ft-86ft

Overall

8811

Females

1844

F55-59

1844

35K→23M

21.8 - 23.0 mi

Top 36%
×5stories
+23ft-63ft

Overall

9590

Females

2300

F55-59

2300

23M→24M

23.0 - 24.0 mi

Top 34%
×6stories
+12ft-82ft

Overall

9017

Females

2111

F55-59

2111

24M→40K

24.0 - 24.9 mi

Top 36%
×1story
+6ft-20ft

Overall

9616

Females

2461

F55-59

2461

40K→25.2M

24.9 - 25.2 mi

Top 41%
×1story
+13ft-16ft

Overall

10796

Females

3070

F55-59

3070

25.2M→Finish

25.2 - 26.2 mi

Top 45%
×2stories
+22ft-21ft

Overall

11877

Females

3634

F55-59

3634

Passing Analysis

Category:
Athletes Passed
3851*
Passed By
877
Net Change
+2974
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#13615
5K → 10K157922+1557#13615#12058
10K → 15K50340+463#12058#11595
15K → 20K47019+451#11595#11144
20K → Half862+84#11144#11060
Half → 25K30913+296#11060#10764
25K → 30K91473-382#10764#11146
30K → 20M175*24+151#11146#10995
20M → 21M7677-1#10995#10996
21M → 35K1088+100#10996#10896
35K → 23M13542+93#10896#10803
23M → 24M11720+97#10803#10706
24M → 40K10629+77#10706#10629
40K → 25.2M3327+6#10629#10623
25.2M → Finish6381-18#10623#10641
TOTALS3851*877+2974

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

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