Boston Marathon logo
BOSTON MARATHON 2023

Kathy Labus

Bib: 20785•F

IN

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Division (F45-49)
#0 / 1817
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
8:35/mi
26:40
↑ 97↓ 3451.5%
10K· 6.21 mi
8:32/mi
53:12
↑ 79↓ 1380.4%
15K· 9.32 mi
8:32/mi
1:19:42
↑ 67↓ 78
20K· 12.43 mi
8:56/mi
1:47:28
↑ 106↓ 860.1%
Half· 13.11 mi
8:54/mi
1:53:32
↑ 19↓ 370.5%
25K· 15.53 mi
9:28/mi
2:16:29
↑ 66↓ 880.2%
30K· 18.64 mi
10:46/mi
2:49:56
↑ 181↓ 1480.2%
20M
13:40/mi
3:08:30
↑ 64↓ 500.2%
21M
12:05/mi
3:20:35
↑ 106↓ 241.6%
35K· 21.75 mi
9:40/mi
3:27:49
↑ 17↓ 861.7%
23M
10:08/mi
3:40:30
↑ 23↓ 630.6%
24M
9:50/mi
3:50:20
↓ 821.3%
40K· 24.85 mi
12:05/mi
4:00:40
↓ 200.3%
25.2M
11:10/mi
4:04:31
↑ 13↓ 160.2%
Finish· 26.22 mi
10:40/mi
4:15:23
↑ 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
Time1:53:32
Pace8:40 /mi
2nd Half
Distance13.11 mi
Time2:21:51
Pace10:49 /mi
📊Positive Split: 24.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:18:5326:408:3526:40
8:35
-
10K
6.21 mi11:45:2553:128:3426:32
8:32
-0:03
15K
9.32 mi12:11:551:19:428:3326:30
8:32
0:00
20K
12.43 mi12:39:411:47:288:3927:46
8:56
+0:24
Half
13.11 mi12:45:451:53:328:406:04
8:54
-0:02
25K
15.53 mi13:08:422:16:298:4722:57
9:28
+0:34
30K
18.64 mi13:42:092:49:569:0733:27
10:46
+1:18
20M
20.00 mi14:00:433:08:309:2518:34
13:40
+2:54
21M
21.00 mi14:12:483:20:359:3312:05
12:05
-1:35
35K
21.75 mi14:20:023:27:499:337:14
9:40
-2:25
23M
23.00 mi14:32:433:40:309:3512:41
10:08
+0:28
24M
24.00 mi14:42:333:50:209:369:50
9:50
-0:18
40K
24.85 mi14:52:534:00:409:4110:20
12:05
+2:15
25.2M
25.20 mi14:56:444:04:319:423:51
11:10
-0:55
Finish
26.22 mi15:07:364:15:239:4510:52
10:40
-0:30

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

8:32 /mi

Average Pace

9:45 /mi

Slowest Pace

13:40 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:53:32

44% of race

Time at Steady Pace

52:42

21% of race

Time at Slower Pace

1:29:09

35% of race

Average Pace: 9:44 /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 mi11:18:5326:408:3526:40
8:35
#18140
10K
6.21 mi11:45:2553:128:3426:32
8:32
#18279
15K
9.32 mi12:11:551:19:428:3326:30
8:32
#18185
20K
12.43 mi12:39:411:47:288:3927:46
8:56
#18503
Half
13.11 mi12:45:451:53:328:406:04
8:54
#18582
25K
15.53 mi13:08:422:16:298:4722:57
9:28
#19017
30K
18.64 mi13:42:092:49:569:0733:27
10:46
#20138
20M
20.00 mi14:00:433:08:309:2518:34
13:40
#21049
21M
21.00 mi14:12:483:20:359:3312:05
12:05
#21204
35K
21.75 mi14:20:023:27:499:337:14
9:40
#21156
23M
23.00 mi14:32:433:40:309:3512:41
10:08
#21086
24M
24.00 mi14:42:333:50:209:369:50
9:50
#21042
40K
24.85 mi14:52:534:00:409:4110:20
12:05
#21226
25.2M
25.20 mi14:56:444:04:319:423:51
11:10
#21213
Finish
26.22 mi15:07:364:15:239:4510:52
10:40
#21311
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi181406647664718032(Top 68%)6520(Top 57%)6520(Top 359%)
10K6.21 mi3.10 mi18279-1396685-386685-3818511(Top 70%)6777(Top 59%)6777(Top 373%)
15K9.32 mi3.11 mi18185+946634+516634+5118032(Top 68%)6520(Top 57%)6520(Top 359%)
20K12.43 mi3.11 mi18503-3186804-1706804-17019412(Top 73%)7333(Top 64%)7333(Top 404%)
Half13.11 mi0.68 mi18582-796856-526856-5220002(Top 75%)7675(Top 67%)7675(Top 422%)
25K15.53 mi2.42 mi19017-4357131-2757131-27520741(Top 78%)8130(Top 71%)8130(Top 447%)
30K18.64 mi3.11 mi20138-11217808-6777808-67722726(Top 85%)9313(Top 82%)9313(Top 513%)
20M20.00 mi1.36 mi21049-9118325-5178325-51725643(Top 96%)10930(Top 96%)10930(Top 602%)
21M21.00 mi1.00 mi21204-1558427-1028427-10222889(Top 86%)9491(Top 83%)9491(Top 522%)
35K21.75 mi0.75 mi21156+488409+188409+1820397(Top 77%)8171(Top 72%)8171(Top 450%)
23M23.00 mi1.25 mi21086+708382+278382+2720396(Top 77%)8176(Top 72%)8176(Top 450%)
24M24.00 mi1.00 mi21042+448368+148368+1420343(Top 76%)8179(Top 72%)8179(Top 450%)
40K24.85 mi0.85 mi21226-1848475-1078475-10723996(Top 90%)10178(Top 89%)10178(Top 560%)
25.2M25.20 mi0.35 mi21213+138470+58470+520858(Top 78%)8510(Top 74%)8510(Top 468%)
Finish26.22 mi1.02 mi21311-988532-628532-6223351(Top 88%)9830(Top 86%)9830(Top 541%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 68%
×21story building
+97ft-345ft

Overall

18032

Females

6520

F45-49

6520

5K→10K

3.1 - 6.2 mi

Top 70%
×5story building
+79ft-138ft

Overall

18511

Females

6777

F45-49

6777

10K→15K

6.2 - 9.3 mi

Top 68%
×3story building
+67ft-78ft

Overall

18032

Females

6520

F45-49

6520

15K→20K

9.3 - 12.4 mi

Top 73%
×5story building
+106ft-86ft

Overall

19412

Females

7333

F45-49

7333

20K→Half

12.4 - 13.1 mi

Top 75%
×2story building
+19ft-37ft

Overall

20002

Females

7675

F45-49

7675

Half→25K

13.1 - 15.5 mi

Top 78%
×4story building
+66ft-88ft

Overall

20741

Females

8130

F45-49

8130

25K→30K

15.5 - 18.6 mi

Top 85%
×9story building
+181ft-148ft

Overall

22726

Females

9313

F45-49

9313

30K→20M

18.6 - 20.0 mi

Top 96%
×5story building
+64ft-50ft

Overall

25643

Females

10930

F45-49

10930

20M→21M

20.0 - 21.0 mi

Top 86%
×8story building
+106ft-24ft

Overall

22889

Females

9491

F45-49

9491

21M→35K

21.0 - 21.8 mi

Top 77%
×7story building
+17ft-86ft

Overall

20397

Females

8171

F45-49

8171

35K→23M

21.8 - 23.0 mi

Top 77%
×5story building
+23ft-63ft

Overall

20396

Females

8176

F45-49

8176

23M→24M

23.0 - 24.0 mi

Top 76%
×6story building
+12ft-82ft

Overall

20343

Females

8179

F45-49

8179

24M→40K

24.0 - 24.9 mi

Top 90%
×1story
+6ft-20ft

Overall

23996

Females

10178

F45-49

10178

40K→25.2M

24.9 - 25.2 mi

Top 78%
×1story
+13ft-16ft

Overall

20858

Females

8510

F45-49

8510

25.2M→Finish

25.2 - 26.2 mi

Top 88%
×2story building
+22ft-21ft

Overall

23351

Females

9830

F45-49

9830

Passing Analysis

Category:
Athletes Passed
918
Passed By
4089
Net Change
-3171
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#18140
5K → 10K241380-139#18140#18279
10K → 15K231137+94#18279#18185
15K → 20K78396-318#18185#18503
20K → Half1392-79#18503#18582
Half → 25K38473-435#18582#19017
25K → 30K181139-1121#19017#20138
30K → 20M6917-911#20138#21049
20M → 21M23178-155#21049#21204
21M → 35K6517+48#21204#21156
35K → 23M9323+70#21156#21086
23M → 24M6016+44#21086#21042
24M → 40K15199-184#21042#21226
40K → 25.2M2815+13#21226#21213
25.2M → Finish9107-98#21213#21311
TOTALS9184089-3171
📊

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