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BOSTON MARATHON 2023

Kelsey Karkos

Bib: 9717•F

CO

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 26%
Gender (Female)
#0 / 11423
Top 8%
Division (F18-39)
#0 / 4884
Top 14%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
21:31
Rank: #5776
Start → 5K
21:31 | 6:56/mi
10K· 6.21 mi
43:24
Rank: #6429 (-653)
5K → 10K
21:53 | 7:03/mi
15K· 9.32 mi
1:05:21
Rank: #6574 (-145)
10K → 15K
21:57 | 7:04/mi
20K· 12.43 mi
1:28:09
Rank: #6897 (-323)
15K → 20K
22:48 | 7:20/mi
Half· 13.11 mi
1:32:56
Rank: #6876 (+21)
20K → Half
4:47 | 7:01/mi
25K· 15.53 mi
1:51:29
Rank: #7237 (-361)
Half → 25K
18:33 | 7:39/mi
30K· 18.64 mi
2:14:58
Rank: #7242 (-5)
25K → 30K
23:29 | 7:34/mi
20M
2:26:06
Rank: #7471 (-229)
30K → 20M
11:08 | 8:12/mi
21M
2:33:56
Rank: #7393 (+78)
20M → 21M
7:50 | 7:50/mi
35K· 21.75 mi
2:39:13
Rank: #7312 (+81)
21M → 35K
5:17 | 7:04/mi
23M
2:48:37
Rank: #7220 (+92)
35K → 23M
9:24 | 7:30/mi
24M
2:55:40
Rank: #7081 (+139)
23M → 24M
7:03 | 7:03/mi
40K· 24.85 mi
3:01:49
Rank: #6966 (+115)
24M → 40K
6:09 | 7:12/mi
25.2M
3:04:26
Rank: #6889 (+77)
40K → 25.2M
2:37 | 7:35/mi
Finish· 26.22 mi
3:11:47
Rank: #6849 (+40)
25.2M → Finish
7:21 | 7:13/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:32:56
Pace7:05 /mi
2nd Half
Distance13.11 mi
Time1:38:51
Pace7:32 /mi
📊Positive Split: 6.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:56:4821:316:5621:31
6:56
-
10K
6.21 mi11:18:4143:246:5921:53
7:03
+0:07
15K
9.32 mi11:40:381:05:217:0121:57
7:04
+0:01
20K
12.43 mi12:03:261:28:097:0622:48
7:20
+0:16
Half
13.11 mi12:08:131:32:567:054:47
7:01
-0:19
25K
15.53 mi12:26:461:51:297:1118:33
7:39
+0:38
30K
18.64 mi12:50:152:14:587:1423:29
7:34
-0:05
20M
20.00 mi13:01:232:26:067:1811:08
8:12
+0:38
21M
21.00 mi13:09:132:33:567:207:50
7:50
-0:22
35K
21.75 mi13:14:302:39:137:195:17
7:04
-0:46
23M
23.00 mi13:23:542:48:377:209:24
7:30
+0:26
24M
24.00 mi13:30:572:55:407:197:03
7:03
-0:27
40K
24.85 mi13:37:063:01:497:196:09
7:12
+0:09
25.2M
25.20 mi13:39:433:04:267:192:37
7:35
+0:23
Finish
26.22 mi13:47:043:11:477:197:21
7:13
-0:22

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

6:56 /mi

Average Pace

7:19 /mi

Slowest Pace

8:12 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:34:16

80% of race

Time at Steady Pace

26:23

14% of race

Time at Slower Pace

11:08

6% of race

Average Pace: 7:19 /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 mi10:56:4821:316:5621:31
6:56
#5776
10K
6.21 mi11:18:4143:246:5921:53
7:03
#6429
15K
9.32 mi11:40:381:05:217:0121:57
7:04
#6574
20K
12.43 mi12:03:261:28:097:0622:48
7:20
#6897
Half
13.11 mi12:08:131:32:567:054:47
7:01
#6876
25K
15.53 mi12:26:461:51:297:1118:33
7:39
#7237
30K
18.64 mi12:50:152:14:587:1423:29
7:34
#7242
20M
20.00 mi13:01:232:26:067:1811:08
8:12
#7471
21M
21.00 mi13:09:132:33:567:207:50
7:50
#7393
35K
21.75 mi13:14:302:39:137:195:17
7:04
#7312
23M
23.00 mi13:23:542:48:377:209:24
7:30
#7220
24M
24.00 mi13:30:572:55:407:197:03
7:03
#7081
40K
24.85 mi13:37:063:01:497:196:09
7:12
#6966
25.2M
25.20 mi13:39:433:04:267:192:37
7:35
#6889
Finish
26.22 mi13:47:043:11:477:197:21
7:13
#6849
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi57764694696952(Top 26%)733(Top 6%)733(Top 15%)
10K6.21 mi3.10 mi6429-653611-142611-1427103(Top 27%)780(Top 7%)780(Top 16%)
15K9.32 mi3.11 mi6574-145633-22633-226952(Top 26%)733(Top 6%)733(Top 15%)
20K12.43 mi3.11 mi6897-323714-81714-818082(Top 30%)1128(Top 10%)1128(Top 23%)
Half13.11 mi0.68 mi6876+21707+7707+76667(Top 25%)679(Top 6%)679(Top 14%)
25K15.53 mi2.42 mi7237-361818-111818-1119916(Top 37%)1962(Top 17%)1962(Top 40%)
30K18.64 mi3.11 mi7242-5839-21839-217644(Top 29%)1160(Top 10%)1160(Top 24%)
20M20.00 mi1.36 mi7471-229943-104943-10411651(Top 44%)3081(Top 27%)3081(Top 63%)
21M21.00 mi1.00 mi7393+78939+4939+46363(Top 24%)901(Top 8%)901(Top 18%)
35K21.75 mi0.75 mi7312+81925+14925+145741(Top 22%)687(Top 6%)687(Top 14%)
23M23.00 mi1.25 mi7220+92910+15910+156483(Top 24%)984(Top 9%)984(Top 20%)
24M24.00 mi1.00 mi7081+139883+27883+274958(Top 19%)568(Top 5%)568(Top 12%)
40K24.85 mi0.85 mi6966+115871+12871+124885(Top 18%)615(Top 5%)615(Top 13%)
25.2M25.20 mi0.35 mi6889+77857+14857+144406(Top 17%)561(Top 5%)561(Top 11%)
Finish26.22 mi1.02 mi6849+40859-2859-26539(Top 25%)1250(Top 11%)1250(Top 26%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 26%
×21stories
+97ft-345ft

Overall

6952

Females

733

F18-39

733

5K→10K

3.1 - 6.2 mi

Top 27%
×5stories
+79ft-138ft

Overall

7103

Females

780

F18-39

780

10K→15K

6.2 - 9.3 mi

Top 26%
×3stories
+67ft-78ft

Overall

6952

Females

733

F18-39

733

15K→20K

9.3 - 12.4 mi

Top 30%
×5stories
+106ft-86ft

Overall

8082

Females

1128

F18-39

1128

20K→Half

12.4 - 13.1 mi

Top 25%
×2stories
+19ft-37ft

Overall

6667

Females

679

F18-39

679

Half→25K

13.1 - 15.5 mi

Top 37%
×4stories
+66ft-88ft

Overall

9916

Females

1962

F18-39

1962

25K→30K

15.5 - 18.6 mi

Top 29%
×9stories
+181ft-148ft

Overall

7644

Females

1160

F18-39

1160

30K→20M

18.6 - 20.0 mi

Top 44%
×5stories
+64ft-50ft

Overall

11651

Females

3081

F18-39

3081

20M→21M

20.0 - 21.0 mi

Top 24%
×8stories
+106ft-24ft

Overall

6363

Females

901

F18-39

901

21M→35K

21.0 - 21.8 mi

Top 22%
×7stories
+17ft-86ft

Overall

5741

Females

687

F18-39

687

35K→23M

21.8 - 23.0 mi

Top 24%
×5stories
+23ft-63ft

Overall

6483

Females

984

F18-39

984

23M→24M

23.0 - 24.0 mi

Top 19%
×6stories
+12ft-82ft

Overall

4958

Females

568

F18-39

568

24M→40K

24.0 - 24.9 mi

Top 18%
×1story
+6ft-20ft

Overall

4885

Females

615

F18-39

615

40K→25.2M

24.9 - 25.2 mi

Top 17%
×1story
+13ft-16ft

Overall

4406

Females

561

F18-39

561

25.2M→Finish

25.2 - 26.2 mi

Top 25%
×2stories
+22ft-21ft

Overall

6539

Females

1250

F18-39

1250

Passing Analysis

Category:
Athletes Passed
1061
Passed By
2134
Net Change
-1073
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#5776
5K → 10K27680-653#5776#6429
10K → 15K66211-145#6429#6574
15K → 20K35358-323#6574#6897
20K → Half3211+21#6897#6876
Half → 25K18379-361#6876#7237
25K → 30K125130-5#7237#7242
30K → 20M26255-229#7242#7471
20M → 21M11133+78#7471#7393
21M → 35K865+81#7393#7312
35K → 23M11826+92#7312#7220
23M → 24M1445+139#7220#7081
24M → 40K1249+115#7081#6966
40K → 25.2M770+77#6966#6889
25.2M → Finish7232+40#6889#6849
TOTALS10612134-1073
📊

Passing Visuals

Category:

📈Position Graph

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🎨Heatmap Timeline

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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