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BOSTON MARATHON 2023

Kristen Karlin

Bib: 19039•F

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0:00
0:00
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Top 40%
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
25:28
Rank: #15466
Start → 5K
8:12/mi
25:28 split
10K· 6.21 mi
50:15
Rank: #15024 (+442)
5K → 10K
7:59/mi
24:47 split
15K· 9.32 mi
1:15:31
Rank: #15138 (-114)
10K → 15K
8:08/mi
25:16 split
20K· 12.43 mi
1:40:46
Rank: #14928 (+210)
15K → 20K
8:08/mi
25:15 split
Half· 13.11 mi
1:46:13
Rank: #14901 (+27)
20K → Half
7:59/mi
5:27 split
25K· 15.53 mi
2:05:51
Rank: #14660 (+241)
Half → 25K
8:06/mi
19:38 split
30K· 18.64 mi
2:31:59
Rank: #14471 (+189)
25K → 30K
8:25/mi
26:08 split
20M
2:43:44
Rank: #14460 (+11)
30K → 20M
8:39/mi
11:45 split
21M
2:53:07
Rank: #14499 (-39)
20M → 21M
9:23/mi
9:23 split
35K· 21.75 mi
2:59:09
Rank: #14440 (+59)
21M → 35K
8:04/mi
6:02 split
23M
3:09:48
Rank: #14344 (+96)
35K → 23M
8:30/mi
10:39 split
24M
3:18:18
Rank: #14332 (+12)
23M → 24M
8:30/mi
8:30 split
40K· 24.85 mi
3:25:58
Rank: #14392 (-60)
24M → 40K
8:58/mi
7:40 split
25.2M
3:29:21
Rank: #14431 (-39)
40K → 25.2M
9:49/mi
3:23 split
Finish· 26.22 mi
3:38:26
Rank: #14541 (-110)
25.2M → Finish
8:55/mi
9:05 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:46:13
Pace8:06 /mi
2nd Half
Distance13.11 mi
Time1:52:13
Pace8:34 /mi
📊Positive Split: 5.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:17:0725:288:1225:28
8:12
-
10K
6.21 mi11:41:5450:158:0524:47
7:59
-0:13
15K
9.32 mi12:07:101:15:318:0625:16
8:08
+0:09
20K
12.43 mi12:32:251:40:468:0725:15
8:08
0:00
Half
13.11 mi12:37:521:46:138:065:27
7:59
-0:09
25K
15.53 mi12:57:302:05:518:0619:38
8:06
+0:07
30K
18.64 mi13:23:382:31:598:0926:08
8:25
+0:19
20M
20.00 mi13:35:232:43:448:1111:45
8:39
+0:14
21M
21.00 mi13:44:462:53:078:159:23
9:23
+0:44
35K
21.75 mi13:50:482:59:098:146:02
8:04
-1:19
23M
23.00 mi14:01:273:09:488:1510:39
8:30
+0:26
24M
24.00 mi14:09:573:18:188:168:30
8:30
0:00
40K
24.85 mi14:17:373:25:588:177:40
8:58
+0:28
25.2M
25.20 mi14:21:003:29:218:183:23
9:49
+0:51
Finish
26.22 mi14:30:053:38:268:209:05
8:55
-0:54

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

7:59 /mi

Average Pace

8:20 /mi

Slowest Pace

9:49 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:46:25

49% of race

Time at Steady Pace

1:22:30

38% of race

Time at Slower Pace

29:31

14% of race

Average Pace: 8:20 /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 mi11:17:0725:288:1225:28
8:12
#15466
10K
6.21 mi11:41:5450:158:0524:47
7:59
#15024
15K
9.32 mi12:07:101:15:318:0625:16
8:08
#15138
20K
12.43 mi12:32:251:40:468:0725:15
8:08
#14928
Half
13.11 mi12:37:521:46:138:065:27
7:59
#14901
25K
15.53 mi12:57:302:05:518:0619:38
8:06
#14660
30K
18.64 mi13:23:382:31:598:0926:08
8:25
#14471
20M
20.00 mi13:35:232:43:448:1111:45
8:39
#14460
21M
21.00 mi13:44:462:53:078:159:23
9:23
#14499
35K
21.75 mi13:50:482:59:098:146:02
8:04
#14440
23M
23.00 mi14:01:273:09:488:1510:39
8:30
#14344
24M
24.00 mi14:09:573:18:188:168:30
8:30
#14332
40K
24.85 mi14:17:373:25:588:177:40
8:58
#14392
25.2M
25.20 mi14:21:003:29:218:183:23
9:49
#14431
Finish
26.22 mi14:30:053:38:268:209:05
8:55
#14541
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi154664941494115386(Top 58%)4900(Top 43%)4900(Top 100%)
10K6.21 mi3.10 mi15024+4424662+2794662+27914657(Top 55%)4455(Top 39%)4455(Top 91%)
15K9.32 mi3.11 mi15138-1144746-844746-8415386(Top 58%)4900(Top 43%)4900(Top 100%)
20K12.43 mi3.11 mi14928+2104639+1074639+10714425(Top 54%)4361(Top 38%)4361(Top 89%)
Half13.11 mi0.68 mi14901+274627+124627+1214359(Top 54%)4303(Top 38%)4303(Top 88%)
25K15.53 mi2.42 mi14660+2414501+1264501+12613511(Top 51%)3932(Top 34%)3932(Top 81%)
30K18.64 mi3.11 mi14471+1894431+704431+7013774(Top 52%)4200(Top 37%)4200(Top 86%)
20M20.00 mi1.36 mi14460+114454-234454-2314563(Top 55%)4741(Top 42%)4741(Top 97%)
21M21.00 mi1.00 mi14499-394494-404494-4015415(Top 58%)5292(Top 46%)5292(Top 108%)
35K21.75 mi0.75 mi14440+594469+254469+2512636(Top 47%)3797(Top 33%)3797(Top 78%)
23M23.00 mi1.25 mi14344+964440+294440+2913302(Top 50%)4244(Top 37%)4244(Top 87%)
24M24.00 mi1.00 mi14332+124446-64446-614486(Top 54%)4943(Top 43%)4943(Top 101%)
40K24.85 mi0.85 mi14392-604513-674513-6715977(Top 60%)5835(Top 51%)5835(Top 119%)
25.2M25.20 mi0.35 mi14431-394547-344547-3416597(Top 62%)6186(Top 54%)6186(Top 127%)
Finish26.22 mi1.02 mi14541-1104623-764623-7617551(Top 66%)6681(Top 58%)6681(Top 137%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 58%
×21story building
+97ft-345ft

Overall

15386

Females

4900

F18-39

4900

5K→10K

3.1 - 6.2 mi

Top 55%
×5story building
+79ft-138ft

Overall

14657

Females

4455

F18-39

4455

10K→15K

6.2 - 9.3 mi

Top 58%
×3story building
+67ft-78ft

Overall

15386

Females

4900

F18-39

4900

15K→20K

9.3 - 12.4 mi

Top 54%
×5story building
+106ft-86ft

Overall

14425

Females

4361

F18-39

4361

20K→Half

12.4 - 13.1 mi

Top 54%
×2story building
+19ft-37ft

Overall

14359

Females

4303

F18-39

4303

Half→25K

13.1 - 15.5 mi

Top 51%
×4story building
+66ft-88ft

Overall

13511

Females

3932

F18-39

3932

25K→30K

15.5 - 18.6 mi

Top 52%
×9story building
+181ft-148ft

Overall

13774

Females

4200

F18-39

4200

30K→20M

18.6 - 20.0 mi

Top 55%
×5story building
+64ft-50ft

Overall

14563

Females

4741

F18-39

4741

20M→21M

20.0 - 21.0 mi

Top 58%
×8story building
+106ft-24ft

Overall

15415

Females

5292

F18-39

5292

21M→35K

21.0 - 21.8 mi

Top 47%
×7story building
+17ft-86ft

Overall

12636

Females

3797

F18-39

3797

35K→23M

21.8 - 23.0 mi

Top 50%
×5story building
+23ft-63ft

Overall

13302

Females

4244

F18-39

4244

23M→24M

23.0 - 24.0 mi

Top 54%
×6story building
+12ft-82ft

Overall

14486

Females

4943

F18-39

4943

24M→40K

24.0 - 24.9 mi

Top 60%
×1story
+6ft-20ft

Overall

15977

Females

5835

F18-39

5835

40K→25.2M

24.9 - 25.2 mi

Top 62%
×1story
+13ft-16ft

Overall

16597

Females

6186

F18-39

6186

25.2M→Finish

25.2 - 26.2 mi

Top 66%
×2story building
+22ft-21ft

Overall

17551

Females

6681

F18-39

6681

Passing Analysis

Category:
Athletes Passed
2119
Passed By
1194
Net Change
+925
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#15466
5K → 10K585143+442#15466#15024
10K → 15K130244-114#15024#15138
15K → 20K29585+210#15138#14928
20K → Half4518+27#14928#14901
Half → 25K26423+241#14901#14660
25K → 30K26677+189#14660#14471
30K → 20M9180+11#14471#14460
20M → 21M69108-39#14460#14499
21M → 35K7314+59#14499#14440
35K → 23M14044+96#14440#14344
23M → 24M7765+12#14344#14332
24M → 40K3999-60#14332#14392
40K → 25.2M1453-39#14392#14431
25.2M → Finish31141-110#14431#14541
TOTALS21191194+925
📊

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