Boston Marathon logo
BOSTON MARATHON 2023

Kara Lightowler

Bib: 8646•F

MA

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Top 18%
Gender (Female)
#0 / 11423
Top 3%
Division (F18-39)
#0 / 4884
Top 7%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:33
Rank: #2993
Start → 5K
20:33 | 6:37/mi
10K· 6.21 mi
41:16
Rank: #3471 (-478)
5K → 10K
20:43 | 6:40/mi
15K· 9.32 mi
1:02:21
Rank: #3919 (-448)
10K → 15K
21:05 | 6:47/mi
20K· 12.43 mi
1:23:43
Rank: #4222 (-303)
15K → 20K
21:22 | 6:53/mi
Half· 13.11 mi
1:28:19
Rank: #4249 (-27)
20K → Half
4:36 | 6:45/mi
25K· 15.53 mi
1:45:32
Rank: #4641 (-392)
Half → 25K
17:13 | 7:06/mi
30K· 18.64 mi
2:08:11
Rank: #4980 (-339)
25K → 30K
22:39 | 7:17/mi
20M
2:18:07
Rank: #5036 (-56)
30K → 20M
9:56 | 7:19/mi
21M
2:25:54
Rank: #5079 (-43)
20M → 21M
7:47 | 7:47/mi
35K· 21.75 mi
2:31:05
Rank: #5054 (+25)
21M → 35K
5:11 | 6:56/mi
23M
2:40:15
Rank: #5039 (+15)
35K → 23M
9:10 | 7:19/mi
24M
2:47:18
Rank: #4988 (+51)
23M → 24M
7:03 | 7:03/mi
40K· 24.85 mi
2:53:26
Rank: #4948 (+40)
24M → 40K
6:08 | 7:10/mi
25.2M
2:56:05
Rank: #4926 (+22)
40K → 25.2M
2:39 | 7:41/mi
Finish· 26.22 mi
3:03:15
Rank: #4896 (+30)
25.2M → Finish
7:10 | 7:02/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
Time1:28:19
Pace6:44 /mi
2nd Half
Distance13.11 mi
Time1:34:56
Pace7:15 /mi
📊Positive Split: 7.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:45:4520:336:3720:33
6:37
-
10K
6.21 mi11:06:2841:166:3820:43
6:40
+0:03
15K
9.32 mi11:27:331:02:216:4121:05
6:47
+0:07
20K
12.43 mi11:48:551:23:436:4421:22
6:53
+0:06
Half
13.11 mi11:53:311:28:196:444:36
6:45
-0:08
25K
15.53 mi12:10:441:45:326:4817:13
7:06
+0:21
30K
18.64 mi12:33:232:08:116:5322:39
7:17
+0:11
20M
20.00 mi12:43:192:18:076:549:56
7:19
+0:02
21M
21.00 mi12:51:062:25:546:577:47
7:47
+0:28
35K
21.75 mi12:56:172:31:056:575:11
6:56
-0:51
23M
23.00 mi13:05:272:40:156:589:10
7:19
+0:23
24M
24.00 mi13:12:302:47:186:587:03
7:03
-0:16
40K
24.85 mi13:18:382:53:266:596:08
7:10
+0:07
25.2M
25.20 mi13:21:172:56:056:592:39
7:41
+0:31
Finish
26.22 mi13:28:273:03:157:007:10
7:02
-0:39

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

6:37 /mi

Average Pace

7:00 /mi

Slowest Pace

7:47 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:11:04

72% of race

Time at Steady Pace

52:11

28% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:59 /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 mi10:45:4520:336:3720:33
6:37
#2993
10K
6.21 mi11:06:2841:166:3820:43
6:40
#3471
15K
9.32 mi11:27:331:02:216:4121:05
6:47
#3919
20K
12.43 mi11:48:551:23:436:4421:22
6:53
#4222
Half
13.11 mi11:53:311:28:196:444:36
6:45
#4249
25K
15.53 mi12:10:441:45:326:4817:13
7:06
#4641
30K
18.64 mi12:33:232:08:116:5322:39
7:17
#4980
20M
20.00 mi12:43:192:18:076:549:56
7:19
#5036
21M
21.00 mi12:51:062:25:546:577:47
7:47
#5079
35K
21.75 mi12:56:172:31:056:575:11
6:56
#5054
23M
23.00 mi13:05:272:40:156:589:10
7:19
#5039
24M
24.00 mi13:12:302:47:186:587:03
7:03
#4988
40K
24.85 mi13:18:382:53:266:596:08
7:10
#4948
25.2M
25.20 mi13:21:172:56:056:592:39
7:41
#4926
Finish
26.22 mi13:28:273:03:157:007:10
7:02
#4896
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi29931511514996(Top 19%)354(Top 3%)354(Top 7%)
10K6.21 mi3.10 mi3471-478190-39190-394061(Top 15%)242(Top 2%)242(Top 5%)
15K9.32 mi3.11 mi3919-448225-35225-354996(Top 19%)354(Top 3%)354(Top 7%)
20K12.43 mi3.11 mi4222-303260-35260-355187(Top 19%)388(Top 3%)388(Top 8%)
Half13.11 mi0.68 mi4249-27264-4264-44859(Top 18%)353(Top 3%)353(Top 7%)
25K15.53 mi2.42 mi4641-392311-47311-476123(Top 23%)583(Top 5%)583(Top 12%)
30K18.64 mi3.11 mi4980-339348-37348-375967(Top 22%)612(Top 5%)612(Top 13%)
20M20.00 mi1.36 mi5036-56367-19367-195706(Top 21%)622(Top 5%)622(Top 13%)
21M21.00 mi1.00 mi5079-43378-11378-116101(Top 23%)828(Top 7%)828(Top 17%)
35K21.75 mi0.75 mi5054+25380-2380-24979(Top 19%)494(Top 4%)494(Top 10%)
23M23.00 mi1.25 mi5039+15394-14394-145446(Top 20%)645(Top 6%)645(Top 13%)
24M24.00 mi1.00 mi4988+51391+3391+34941(Top 19%)551(Top 5%)551(Top 11%)
40K24.85 mi0.85 mi4948+40386+5386+54770(Top 18%)574(Top 5%)574(Top 12%)
25.2M25.20 mi0.35 mi4926+22387-1387-14848(Top 18%)655(Top 6%)655(Top 13%)
Finish26.22 mi1.02 mi4896+30385+2385+25415(Top 20%)862(Top 8%)862(Top 18%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 19%
×21stories
+97ft-345ft

Overall

4996

Females

354

F18-39

354

5K→10K

3.1 - 6.2 mi

Top 15%
×5stories
+79ft-138ft

Overall

4061

Females

242

F18-39

242

10K→15K

6.2 - 9.3 mi

Top 19%
×3stories
+67ft-78ft

Overall

4996

Females

354

F18-39

354

15K→20K

9.3 - 12.4 mi

Top 19%
×5stories
+106ft-86ft

Overall

5187

Females

388

F18-39

388

20K→Half

12.4 - 13.1 mi

Top 18%
×2stories
+19ft-37ft

Overall

4859

Females

353

F18-39

353

Half→25K

13.1 - 15.5 mi

Top 23%
×4stories
+66ft-88ft

Overall

6123

Females

583

F18-39

583

25K→30K

15.5 - 18.6 mi

Top 22%
×9stories
+181ft-148ft

Overall

5967

Females

612

F18-39

612

30K→20M

18.6 - 20.0 mi

Top 21%
×5stories
+64ft-50ft

Overall

5706

Females

622

F18-39

622

20M→21M

20.0 - 21.0 mi

Top 23%
×8stories
+106ft-24ft

Overall

6101

Females

828

F18-39

828

21M→35K

21.0 - 21.8 mi

Top 19%
×7stories
+17ft-86ft

Overall

4979

Females

494

F18-39

494

35K→23M

21.8 - 23.0 mi

Top 20%
×5stories
+23ft-63ft

Overall

5446

Females

645

F18-39

645

23M→24M

23.0 - 24.0 mi

Top 19%
×6stories
+12ft-82ft

Overall

4941

Females

551

F18-39

551

24M→40K

24.0 - 24.9 mi

Top 18%
×1story
+6ft-20ft

Overall

4770

Females

574

F18-39

574

40K→25.2M

24.9 - 25.2 mi

Top 18%
×1story
+13ft-16ft

Overall

4848

Females

655

F18-39

655

25.2M→Finish

25.2 - 26.2 mi

Top 20%
×2stories
+22ft-21ft

Overall

5415

Females

862

F18-39

862

Passing Analysis

Category:
Athletes Passed
639
Passed By
2542
Net Change
-1903
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#2993
5K → 10K42520-478#2993#3471
10K → 15K25473-448#3471#3919
15K → 20K32335-303#3919#4222
20K → Half1138-27#4222#4249
Half → 25K34426-392#4249#4641
25K → 30K52391-339#4641#4980
30K → 20M50106-56#4980#5036
20M → 21M4790-43#5036#5079
21M → 35K4621+25#5079#5054
35K → 23M7762+15#5054#5039
23M → 24M7322+51#5039#4988
24M → 40K6020+40#4988#4948
40K → 25.2M3210+22#4948#4926
25.2M → Finish5828+30#4926#4896
TOTALS6392542-1903
📊

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