Boston Marathon logo
BOSTON MARATHON 2023

Laura Jansik

Bib: 23294•F

FL

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Division (F55-59)
#0 / 815
Top 35%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
27:24
Rank: #19571
Start → 5K
27:24 | 8:49/mi
10K· 6.21 mi
54:27
Rank: #19477 (+94)
5K → 10K
27:03 | 8:42/mi
15K· 9.32 mi
1:21:20
Rank: #19194 (+283)
10K → 15K
26:53 | 8:39/mi
20K· 12.43 mi
1:48:19
Rank: #18879 (+315)
15K → 20K
26:59 | 8:41/mi
Half· 13.11 mi
1:54:09
Rank: #18837 (+42)
20K → Half
5:50 | 8:33/mi
25K· 15.53 mi
2:15:23
Rank: #18663 (+174)
Half → 25K
21:14 | 8:45/mi
30K· 18.64 mi
2:43:42
Rank: #18474 (+189)
25K → 30K
28:19 | 9:07/mi
20M
2:56:15
Rank: #18411 (+63)
30K → 20M
12:33 | 9:14/mi
21M
3:06:20
Rank: #18385 (+26)
20M → 21M
10:05 | 10:05/mi
35K· 21.75 mi
3:13:01
Rank: #18354 (+31)
21M → 35K
6:41 | 8:56/mi
23M
3:24:59
Rank: #18373 (-19)
35K → 23M
11:58 | 9:33/mi
24M
3:34:13
Rank: #18379 (-6)
23M → 24M
9:14 | 9:14/mi
40K· 24.85 mi
3:42:19
Rank: #18374 (+5)
24M → 40K
8:06 | 9:28/mi
25.2M
3:45:53
Rank: #18381 (-7)
40K → 25.2M
3:34 | 10:21/mi
Finish· 26.22 mi
3:55:30
Rank: #18458 (-77)
25.2M → Finish
9:37 | 9:26/mi

The Course

Is this your race?

Claim it — unlock a deeper AI report on this race, free

A personalized Race Performance Report that goes beyond this page — emailed to you, built from your real splits.

Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:54:09
Pace8:42 /mi
2nd Half
Distance13.11 mi
Time2:01:21
Pace9:15 /mi
📊Positive Split: 6.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:23:1727:248:4927:24
8:49
-
10K
6.21 mi11:50:2054:278:4627:03
8:42
-0:07
15K
9.32 mi12:17:131:21:208:4426:53
8:39
-0:03
20K
12.43 mi12:44:121:48:198:4326:59
8:41
+0:02
Half
13.11 mi12:50:021:54:098:425:50
8:33
-0:08
25K
15.53 mi13:11:162:15:238:4321:14
8:45
+0:12
30K
18.64 mi13:39:352:43:428:4728:19
9:07
+0:22
20M
20.00 mi13:52:082:56:158:4912:33
9:14
+0:07
21M
21.00 mi14:02:133:06:208:5210:05
10:05
+0:51
35K
21.75 mi14:08:543:13:018:536:41
8:56
-1:09
23M
23.00 mi14:20:523:24:598:5511:58
9:33
+0:37
24M
24.00 mi14:30:063:34:138:569:14
9:14
-0:19
40K
24.85 mi14:38:123:42:198:578:06
9:28
+0:14
25.2M
25.20 mi14:41:463:45:538:583:34
10:21
+0:53
Finish
26.22 mi14:51:233:55:308:599:37
9:26
-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

8:33 /mi

Average Pace

8:59 /mi

Slowest Pace

10:21 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:15:23

57% of race

Time at Steady Pace

56:47

24% of race

Time at Slower Pace

43:20

18% of race

Average Pace: 8:59 /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 mi11:23:1727:248:4927:24
8:49
#19571
10K
6.21 mi11:50:2054:278:4627:03
8:42
#19477
15K
9.32 mi12:17:131:21:208:4426:53
8:39
#19194
20K
12.43 mi12:44:121:48:198:4326:59
8:41
#18879
Half
13.11 mi12:50:021:54:098:425:50
8:33
#18837
25K
15.53 mi13:11:162:15:238:4321:14
8:45
#18663
30K
18.64 mi13:39:352:43:428:4728:19
9:07
#18474
20M
20.00 mi13:52:082:56:158:4912:33
9:14
#18411
21M
21.00 mi14:02:133:06:208:5210:05
10:05
#18385
35K
21.75 mi14:08:543:13:018:536:41
8:56
#18354
23M
23.00 mi14:20:523:24:598:5511:58
9:33
#18373
24M
24.00 mi14:30:063:34:138:569:14
9:14
#18379
40K
24.85 mi14:38:123:42:198:578:06
9:28
#18374
25.2M
25.20 mi14:41:463:45:538:583:34
10:21
#18381
Finish
26.22 mi14:51:233:55:308:599:37
9:26
#18458
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF55-59Seg. OverallSeg. FemalesSeg. F55-59
5K3.11 mi3.11 mi195717557755718749(Top 70%)6952(Top 61%)6952(Top 853%)
10K6.21 mi3.10 mi19477+947448+1097448+10919471(Top 73%)7365(Top 64%)7365(Top 904%)
15K9.32 mi3.11 mi19194+2837246+2027246+20218749(Top 70%)6952(Top 61%)6952(Top 853%)
20K12.43 mi3.11 mi18879+3157048+1987048+19818038(Top 68%)6534(Top 57%)6534(Top 802%)
Half13.11 mi0.68 mi18837+427026+227026+2218068(Top 68%)6532(Top 57%)6532(Top 801%)
25K15.53 mi2.42 mi18663+1746933+936933+9317724(Top 67%)6421(Top 56%)6421(Top 788%)
30K18.64 mi3.11 mi18474+1896852+816852+8117777(Top 67%)6512(Top 57%)6512(Top 799%)
20M20.00 mi1.36 mi18411+636818+346818+3417746(Top 67%)6610(Top 58%)6610(Top 811%)
21M21.00 mi1.00 mi18385+266820-26820-218342(Top 69%)6961(Top 61%)6961(Top 854%)
35K21.75 mi0.75 mi18354+316808+126808+1217656(Top 66%)6642(Top 58%)6642(Top 815%)
23M23.00 mi1.25 mi18373-196833-256833-2518561(Top 70%)7160(Top 63%)7160(Top 879%)
24M24.00 mi1.00 mi18379-66845-126845-1218201(Top 68%)7008(Top 61%)7008(Top 860%)
40K24.85 mi0.85 mi18374+56853-86853-818260(Top 69%)7080(Top 62%)7080(Top 869%)
25.2M25.20 mi0.35 mi18381-76860-76860-718638(Top 70%)7300(Top 64%)7300(Top 896%)
Finish26.22 mi1.02 mi18458-776909-496909-4919911(Top 75%)7944(Top 70%)7944(Top 975%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 70%
×21stories
+97ft-345ft

Overall

18749

Females

6952

F55-59

6952

5K→10K

3.1 - 6.2 mi

Top 73%
×5stories
+79ft-138ft

Overall

19471

Females

7365

F55-59

7365

10K→15K

6.2 - 9.3 mi

Top 70%
×3stories
+67ft-78ft

Overall

18749

Females

6952

F55-59

6952

15K→20K

9.3 - 12.4 mi

Top 68%
×5stories
+106ft-86ft

Overall

18038

Females

6534

F55-59

6534

20K→Half

12.4 - 13.1 mi

Top 68%
×2stories
+19ft-37ft

Overall

18068

Females

6532

F55-59

6532

Half→25K

13.1 - 15.5 mi

Top 67%
×4stories
+66ft-88ft

Overall

17724

Females

6421

F55-59

6421

25K→30K

15.5 - 18.6 mi

Top 67%
×9stories
+181ft-148ft

Overall

17777

Females

6512

F55-59

6512

30K→20M

18.6 - 20.0 mi

Top 67%
×5stories
+64ft-50ft

Overall

17746

Females

6610

F55-59

6610

20M→21M

20.0 - 21.0 mi

Top 69%
×8stories
+106ft-24ft

Overall

18342

Females

6961

F55-59

6961

21M→35K

21.0 - 21.8 mi

Top 66%
×7stories
+17ft-86ft

Overall

17656

Females

6642

F55-59

6642

35K→23M

21.8 - 23.0 mi

Top 70%
×5stories
+23ft-63ft

Overall

18561

Females

7160

F55-59

7160

23M→24M

23.0 - 24.0 mi

Top 68%
×6stories
+12ft-82ft

Overall

18201

Females

7008

F55-59

7008

24M→40K

24.0 - 24.9 mi

Top 69%
×1story
+6ft-20ft

Overall

18260

Females

7080

F55-59

7080

40K→25.2M

24.9 - 25.2 mi

Top 70%
×1story
+13ft-16ft

Overall

18638

Females

7300

F55-59

7300

25.2M→Finish

25.2 - 26.2 mi

Top 75%
×2stories
+22ft-21ft

Overall

19911

Females

7944

F55-59

7944

Passing Analysis

Category:
Athletes Passed
2113
Passed By
1000
Net Change
+1113
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#19571
5K → 10K367273+94#19571#19477
10K → 15K36279+283#19477#19194
15K → 20K35641+315#19194#18879
20K → Half5311+42#18879#18837
Half → 25K21036+174#18837#18663
25K → 30K26677+189#18663#18474
30K → 20M11754+63#18474#18411
20M → 21M9771+26#18411#18385
21M → 35K5625+31#18385#18354
35K → 23M7796-19#18354#18373
23M → 24M5157-6#18373#18379
24M → 40K5550+5#18379#18374
40K → 25.2M2027-7#18374#18381
25.2M → Finish26103-77#18381#18458
TOTALS21131000+1113
📊

Passing Visuals

Category:
Loading...

🔥Passing Intensity

Loading...

🔄Passing Circle

Loading...

🌊Position Flow

Loading...

🏃Race Lanes

Loading...

Upload your GPX file

Supports Garmin, Apple Watch, Polar, Suunto, COROS, Strava, and other apps

.gpx files up to 10MB

Export Track Data

Download your race performance as a GPX or TCX file to import into Strava, Garmin Connect, or other fitness apps.

Questions or issues regarding timing data?

If you notice any discrepancies in your timing data or have questions about your results, our support team can help.

Contact Race Support
Share Feedback

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing