Boston Marathon logo
BOSTON MARATHON 2023

Kara Larcome

Bib: 27878•F

MA

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Division (F40-44)
#0 / 1878
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
12:39/mi
39:19
↑ 97↓ 3451.5%
10K· 6.21 mi
11:48/mi
1:16:00
↑ 79↓ 1380.4%
15K· 9.32 mi
12:16/mi
1:54:06
↑ 67↓ 78
20K· 12.43 mi
12:30/mi
2:32:57
↑ 106↓ 860.1%
Half· 13.11 mi
11:24/mi
2:40:44
↑ 19↓ 370.5%
25K· 15.53 mi
13:42/mi
3:13:57
↑ 66↓ 880.2%
30K· 18.64 mi
12:15/mi
3:52:02
↑ 181↓ 1480.2%
20M
18:25/mi
4:17:04
↑ 64↓ 500.2%
21M
13:48/mi
4:30:52
↑ 106↓ 241.6%
35K· 21.75 mi
14:40/mi
4:41:50
↑ 17↓ 861.7%
23M
11:56/mi
4:56:47
↑ 23↓ 630.6%
24M
14:29/mi
5:11:16
↓ 821.3%
40K· 24.85 mi
14:28/mi
5:23:38
↓ 200.3%
25.2M
14:42/mi
5:28:42
↑ 13↓ 160.2%
Finish· 26.22 mi
11:32/mi
5:40:27
↑ 22↓ 21

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
Time2:40:44
Pace12:16 /mi
2nd Half
Distance13.11 mi
Time2:59:43
Pace13:43 /mi
📊Positive Split: 11.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:56:2139:1912:3939:19
12:39
-
10K
6.21 mi12:33:021:16:0012:1436:41
11:48
-0:51
15K
9.32 mi13:11:081:54:0612:1538:06
12:16
+0:28
20K
12.43 mi13:49:592:32:5712:1838:51
12:30
+0:14
Half
13.11 mi13:57:462:40:4412:167:47
11:24
-1:06
25K
15.53 mi14:30:593:13:5712:2933:13
13:42
+2:18
30K
18.64 mi15:09:043:52:0212:2738:05
12:15
-1:27
20M
20.00 mi15:34:064:17:0412:5125:02
18:25
+6:10
21M
21.00 mi15:47:544:30:5212:5413:48
13:48
-4:37
35K
21.75 mi15:58:524:41:5012:5810:58
14:40
+0:52
23M
23.00 mi16:13:494:56:4712:5414:57
11:56
-2:44
24M
24.00 mi16:28:185:11:1612:5814:29
14:29
+2:33
40K
24.85 mi16:40:405:23:3813:0112:22
14:28
-0:01
25.2M
25.20 mi16:45:445:28:4213:035:04
14:42
+0:14
Finish
26.22 mi16:57:295:40:2713:0011:45
11:32
-3:10

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

11:24 /mi

Average Pace

13:00 /mi

Slowest Pace

18:25 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

19:32

6% of race

Time at Steady Pace

3:25:59

61% of race

Time at Slower Pace

1:54:56

34% of race

Average Pace: 12:59 /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 mi11:56:2139:1912:3939:19
12:39
#26556
10K
6.21 mi12:33:021:16:0012:1436:41
11:48
#26459
15K
9.32 mi13:11:081:54:0612:1538:06
12:16
#26402
20K
12.43 mi13:49:592:32:5712:1838:51
12:30
#26327
Half
13.11 mi13:57:462:40:4412:167:47
11:24
#26291
25K
15.53 mi14:30:593:13:5712:2933:13
13:42
#26283
30K
18.64 mi15:09:043:52:0212:2738:05
12:15
#26107
20M
20.00 mi15:34:064:17:0412:5125:02
18:25
#26265
21M
21.00 mi15:47:544:30:5212:5413:48
13:48
#26207
35K
21.75 mi15:58:524:41:5012:5810:58
14:40
#26226
23M
23.00 mi16:13:494:56:4712:5414:57
11:56
#26161
24M
24.00 mi16:28:185:11:1612:5814:29
14:29
#26177
40K
24.85 mi16:40:405:23:3813:0112:22
14:28
#26182
25.2M
25.20 mi16:45:445:28:4213:035:04
14:42
#26177
Finish
26.22 mi16:57:295:40:2713:0011:45
11:32
#26140
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi26556113921139226211(Top 98%)11173(Top 98%)11173(Top 595%)
10K6.21 mi3.10 mi26459+9711332+6011332+6026156(Top 98%)11141(Top 98%)11141(Top 593%)
15K9.32 mi3.11 mi26402+5711296+3611296+3626211(Top 98%)11173(Top 98%)11173(Top 595%)
20K12.43 mi3.11 mi26327+7511245+5111245+5125973(Top 98%)11041(Top 97%)11041(Top 588%)
Half13.11 mi0.68 mi26291+3611217+2811217+2825411(Top 95%)10738(Top 94%)10738(Top 572%)
25K15.53 mi2.42 mi26283+811212+511212+526216(Top 98%)11197(Top 98%)11197(Top 596%)
30K18.64 mi3.11 mi26107+17611123+8911123+8924775(Top 93%)10437(Top 91%)10437(Top 556%)
20M20.00 mi1.36 mi26265-15811213-9011213-9026596(Top 100%)11415(Top 100%)11415(Top 608%)
21M21.00 mi1.00 mi26207+5811183+3011183+3024873(Top 93%)10544(Top 92%)10544(Top 561%)
35K21.75 mi0.75 mi26226-1911199-1611199-1626347(Top 99%)11303(Top 99%)11303(Top 602%)
23M23.00 mi1.25 mi26161+6511162+3711162+3723932(Top 90%)10087(Top 88%)10087(Top 537%)
24M24.00 mi1.00 mi26177-1611173-1111173-1126255(Top 99%)11277(Top 99%)11277(Top 600%)
40K24.85 mi0.85 mi26182-511177-411177-425935(Top 97%)11144(Top 98%)11144(Top 593%)
25.2M25.20 mi0.35 mi26177+511172+511172+525532(Top 96%)10946(Top 96%)10946(Top 583%)
Finish26.22 mi1.02 mi26140+3711156+1611156+1624719(Top 93%)10520(Top 92%)10520(Top 560%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 98%
×21story building
+97ft-345ft

Overall

26211

Females

11173

F40-44

11173

5K→10K

3.1 - 6.2 mi

Top 98%
×5story building
+79ft-138ft

Overall

26156

Females

11141

F40-44

11141

10K→15K

6.2 - 9.3 mi

Top 98%
×3story building
+67ft-78ft

Overall

26211

Females

11173

F40-44

11173

15K→20K

9.3 - 12.4 mi

Top 98%
×5story building
+106ft-86ft

Overall

25973

Females

11041

F40-44

11041

20K→Half

12.4 - 13.1 mi

Top 95%
×2story building
+19ft-37ft

Overall

25411

Females

10738

F40-44

10738

Half→25K

13.1 - 15.5 mi

Top 98%
×4story building
+66ft-88ft

Overall

26216

Females

11197

F40-44

11197

25K→30K

15.5 - 18.6 mi

Top 93%
×9story building
+181ft-148ft

Overall

24775

Females

10437

F40-44

10437

30K→20M

18.6 - 20.0 mi

Top 100%
×5story building
+64ft-50ft

Overall

26596

Females

11415

F40-44

11415

20M→21M

20.0 - 21.0 mi

Top 93%
×8story building
+106ft-24ft

Overall

24873

Females

10544

F40-44

10544

21M→35K

21.0 - 21.8 mi

Top 99%
×7story building
+17ft-86ft

Overall

26347

Females

11303

F40-44

11303

35K→23M

21.8 - 23.0 mi

Top 90%
×5story building
+23ft-63ft

Overall

23932

Females

10087

F40-44

10087

23M→24M

23.0 - 24.0 mi

Top 99%
×6story building
+12ft-82ft

Overall

26255

Females

11277

F40-44

11277

24M→40K

24.0 - 24.9 mi

Top 97%
×1story
+6ft-20ft

Overall

25935

Females

11144

F40-44

11144

40K→25.2M

24.9 - 25.2 mi

Top 96%
×1story
+13ft-16ft

Overall

25532

Females

10946

F40-44

10946

25.2M→Finish

25.2 - 26.2 mi

Top 93%
×2story building
+22ft-21ft

Overall

24719

Females

10520

F40-44

10520

Passing Analysis

Category:
Athletes Passed
670
Passed By
254
Net Change
+416
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#26556
5K → 10K992+97#26556#26459
10K → 15K625+57#26459#26402
15K → 20K827+75#26402#26327
20K → Half360+36#26327#26291
Half → 25K2618+8#26291#26283
25K → 30K1760+176#26283#26107
30K → 20M1159-158#26107#26265
20M → 21M602+58#26265#26207
21M → 35K625-19#26207#26226
35K → 23M650+65#26226#26161
23M → 24M218-16#26161#26177
24M → 40K1116-5#26177#26182
40K → 25.2M61+5#26182#26177
25.2M → Finish381+37#26177#26140
TOTALS670254+416
📊

Passing Visuals

Category:
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

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing