Boston Marathon logo
BOSTON MARATHON 2023

Laura Pennington

Bib: 9920•F

TX

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Top 21%
Gender (Female)
#0 / 11423
Top 5%
Division (F18-39)
#0 / 4884
Top 9%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
22:11
Rank: #7134
Start → 5K
22:11 | 7:08/mi
10K· 6.21 mi
43:53
Rank: #6872 (+262)
5K → 10K
21:42 | 6:59/mi
15K· 9.32 mi
1:05:32
Rank: #6694 (+178)
10K → 15K
21:39 | 6:58/mi
20K· 12.43 mi
1:27:20
Rank: #6497 (+197)
15K → 20K
21:48 | 7:01/mi
Half· 13.11 mi
1:32:07
Rank: #6511 (-14)
20K → Half
4:47 | 7:01/mi
25K· 15.53 mi
1:49:20
Rank: #6437 (+74)
Half → 25K
17:13 | 7:06/mi
30K· 18.64 mi
2:11:50
Rank: #6253 (+184)
25K → 30K
22:30 | 7:15/mi
20M
2:21:40
Rank: #6133 (+120)
30K → 20M
9:50 | 7:14/mi
21M
2:29:21
Rank: #6076 (+57)
20M → 21M
7:41 | 7:41/mi
35K· 21.75 mi
2:34:41
Rank: #6040 (+36)
21M → 35K
5:20 | 7:08/mi
23M
2:43:48
Rank: #5937 (+103)
35K → 23M
9:07 | 7:17/mi
24M
2:50:53
Rank: #5840 (+97)
23M → 24M
7:05 | 7:05/mi
40K· 24.85 mi
2:56:56
Rank: #5746 (+94)
24M → 40K
6:03 | 7:05/mi
25.2M
2:59:32
Rank: #5702 (+44)
40K → 25.2M
2:36 | 7:32/mi
Finish· 26.22 mi
3:06:28
Rank: #5579 (+123)
25.2M → Finish
6:56 | 6:48/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
Time1:32:07
Pace7:02 /mi
2nd Half
Distance13.11 mi
Time1:34:21
Pace7:12 /mi
📊Positive Split: 2.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:48:0822:117:0822:11
7:08
-
10K
6.21 mi11:09:5043:537:0421:42
6:59
-0:09
15K
9.32 mi11:31:291:05:327:0221:39
6:58
-0:01
20K
12.43 mi11:53:171:27:207:0221:48
7:01
+0:03
Half
13.11 mi11:58:041:32:077:024:47
7:01
0:00
25K
15.53 mi12:15:171:49:207:0217:13
7:06
+0:05
30K
18.64 mi12:37:472:11:507:0422:30
7:15
+0:09
20M
20.00 mi12:47:372:21:407:059:50
7:14
-0:01
21M
21.00 mi12:55:182:29:217:077:41
7:41
+0:27
35K
21.75 mi13:00:382:34:417:075:20
7:08
-0:33
23M
23.00 mi13:09:452:43:487:079:07
7:17
+0:09
24M
24.00 mi13:16:502:50:537:077:05
7:05
-0:12
40K
24.85 mi13:22:532:56:567:076:03
7:05
0:00
25.2M
25.20 mi13:25:292:59:327:072:36
7:32
+0:27
Finish
26.22 mi13:32:253:06:287:076:56
6:48
-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

6:48 /mi

Average Pace

7:07 /mi

Slowest Pace

7:41 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:56:11

94% of race

Time at Steady Pace

10:17

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:07 /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 mi10:48:0822:117:0822:11
7:08
#7134
10K
6.21 mi11:09:5043:537:0421:42
6:59
#6872
15K
9.32 mi11:31:291:05:327:0221:39
6:58
#6694
20K
12.43 mi11:53:171:27:207:0221:48
7:01
#6497
Half
13.11 mi11:58:041:32:077:024:47
7:01
#6511
25K
15.53 mi12:15:171:49:207:0217:13
7:06
#6437
30K
18.64 mi12:37:472:11:507:0422:30
7:15
#6253
20M
20.00 mi12:47:372:21:407:059:50
7:14
#6133
21M
21.00 mi12:55:182:29:217:077:41
7:41
#6076
35K
21.75 mi13:00:382:34:417:075:20
7:08
#6040
23M
23.00 mi13:09:452:43:487:079:07
7:17
#5937
24M
24.00 mi13:16:502:50:537:077:05
7:05
#5840
40K
24.85 mi13:22:532:56:567:076:03
7:05
#5746
25.2M
25.20 mi13:25:292:59:327:072:36
7:32
#5702
Finish
26.22 mi13:32:253:06:287:076:56
6:48
#5579
Faster pace
Steady pace
Slower pace
Est.Checkpoint not recorded (estimated)
~Segment time uses estimated prior

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi71347507506373(Top 24%)612(Top 5%)612(Top 13%)
10K6.21 mi3.10 mi6872+262694+56694+566728(Top 25%)681(Top 6%)681(Top 14%)
15K9.32 mi3.11 mi6694+178659+35659+356373(Top 24%)612(Top 5%)612(Top 13%)
20K12.43 mi3.11 mi6497+197629+30629+306069(Top 23%)544(Top 5%)544(Top 11%)
Half13.11 mi0.68 mi6511-14633-4633-46676(Top 25%)685(Top 6%)685(Top 14%)
25K15.53 mi2.42 mi6437+74623+10623+106127(Top 23%)587(Top 5%)587(Top 12%)
30K18.64 mi3.11 mi6253+184593+30593+305733(Top 22%)559(Top 5%)559(Top 11%)
20M20.00 mi1.36 mi6133+120576+17576+175319(Top 20%)527(Top 5%)527(Top 11%)
21M21.00 mi1.00 mi6076+57570+6570+65546(Top 21%)674(Top 6%)674(Top 14%)
35K21.75 mi0.75 mi6040+36572-2572-26119(Top 23%)790(Top 7%)790(Top 16%)
23M23.00 mi1.25 mi5937+103561+11561+115237(Top 20%)596(Top 5%)596(Top 12%)
24M24.00 mi1.00 mi5840+97547+14547+145140(Top 19%)605(Top 5%)605(Top 12%)
40K24.85 mi0.85 mi5746+94537+10537+104282(Top 16%)473(Top 4%)473(Top 10%)
25.2M25.20 mi0.35 mi5702+44533+4533+44157(Top 16%)483(Top 4%)483(Top 10%)
Finish26.22 mi1.02 mi5579+123517+16517+164116(Top 15%)483(Top 4%)483(Top 10%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 24%
×21stories
+97ft-345ft

Overall

6373

Females

612

F18-39

612

5K→10K

3.1 - 6.2 mi

Top 25%
×5stories
+79ft-138ft

Overall

6728

Females

681

F18-39

681

10K→15K

6.2 - 9.3 mi

Top 24%
×3stories
+67ft-78ft

Overall

6373

Females

612

F18-39

612

15K→20K

9.3 - 12.4 mi

Top 23%
×5stories
+106ft-86ft

Overall

6069

Females

544

F18-39

544

20K→Half

12.4 - 13.1 mi

Top 25%
×2stories
+19ft-37ft

Overall

6676

Females

685

F18-39

685

Half→25K

13.1 - 15.5 mi

Top 23%
×4stories
+66ft-88ft

Overall

6127

Females

587

F18-39

587

25K→30K

15.5 - 18.6 mi

Top 22%
×9stories
+181ft-148ft

Overall

5733

Females

559

F18-39

559

30K→20M

18.6 - 20.0 mi

Top 20%
×5stories
+64ft-50ft

Overall

5319

Females

527

F18-39

527

20M→21M

20.0 - 21.0 mi

Top 21%
×8stories
+106ft-24ft

Overall

5546

Females

674

F18-39

674

21M→35K

21.0 - 21.8 mi

Top 23%
×7stories
+17ft-86ft

Overall

6119

Females

790

F18-39

790

35K→23M

21.8 - 23.0 mi

Top 20%
×5stories
+23ft-63ft

Overall

5237

Females

596

F18-39

596

23M→24M

23.0 - 24.0 mi

Top 19%
×6stories
+12ft-82ft

Overall

5140

Females

605

F18-39

605

24M→40K

24.0 - 24.9 mi

Top 16%
×1story
+6ft-20ft

Overall

4282

Females

473

F18-39

473

40K→25.2M

24.9 - 25.2 mi

Top 16%
×1story
+13ft-16ft

Overall

4157

Females

483

F18-39

483

25.2M→Finish

25.2 - 26.2 mi

Top 15%
×2stories
+22ft-21ft

Overall

4116

Females

483

F18-39

483

Passing Analysis

Category:
Athletes Passed
1917
Passed By
362
Net Change
+1555
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#7134
5K → 10K35492+262#7134#6872
10K → 15K22547+178#6872#6694
15K → 20K22326+197#6694#6497
20K → Half1529-14#6497#6511
Half → 25K11440+74#6511#6437
25K → 30K21733+184#6437#6253
30K → 20M1299+120#6253#6133
20M → 21M8124+57#6133#6076
21M → 35K5418+36#6076#6040
35K → 23M12017+103#6040#5937
23M → 24M10912+97#5937#5840
24M → 40K1006+94#5840#5746
40K → 25.2M451+44#5746#5702
25.2M → Finish1318+123#5702#5579
TOTALS1917362+1555
📊

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