Boston Marathon logo
BOSTON MARATHON 2024

Tze-Kwun Lau

Bib: 27886•F

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 25550
Gender (Female)
#0 / 10924
Masters (Masters Women)
#0 / 6263
Division (F45-49)
#0 / 1753
Race Day Weather
55°/45°F
scattered clouds

⏱️ 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
11:17/mi
35:02
↑ 97↓ 3451.5%
10K· 6.21 mi
11:43/mi
1:11:26
↑ 79↓ 1380.4%
15K· 9.32 mi
11:38/mi
1:47:34
↑ 67↓ 78
20K· 12.43 mi
11:36/mi
2:23:37
↑ 106↓ 860.1%
Half· 13.11 mi
11:14/mi
2:31:17
↑ 19↓ 370.5%
25K· 15.53 mi
12:01/mi
3:00:24
↑ 66↓ 880.2%
30K· 18.64 mi
12:31/mi
3:39:18
↑ 181↓ 1480.2%
20M
12:52/mi
3:56:47
↑ 64↓ 500.2%
21M
14:34/mi
4:11:21
↑ 106↓ 241.6%
35K· 21.75 mi
12:45/mi
4:20:53
↑ 17↓ 861.7%
23M
12:51/mi
4:36:58
↑ 23↓ 630.6%
24M
13:42/mi
4:50:40
↓ 821.3%
40K· 24.85 mi
13:28/mi
5:02:11
↓ 200.3%
25.2M
15:05/mi
5:07:23
↑ 13↓ 160.2%
Finish· 26.22 mi
11:43/mi
5:19:19
↑ 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
Time2:31:17
Pace11:32 /mi
2nd Half
Distance13.11 mi
Time2:48:02
Pace12:49 /mi
📊Positive Split: 11.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:53:3535:0211:1735:02
11:17
-
10K
6.21 mi12:29:591:11:2611:3036:24
11:43
+0:26
15K
9.32 mi13:06:071:47:3411:3236:08
11:38
-0:05
20K
12.43 mi13:42:102:23:3711:3336:03
11:36
-0:02
Half
13.11 mi13:49:502:31:1711:327:40
11:14
-0:22
25K
15.53 mi14:18:573:00:2411:3729:07
12:01
+0:47
30K
18.64 mi14:57:513:39:1811:4638:54
12:31
+0:30
20M
20.00 mi15:15:203:56:4711:5017:29
12:52
+0:21
21M
21.00 mi15:29:544:11:2111:5814:34
14:34
+1:42
35K
21.75 mi15:39:264:20:5312:009:32
12:45
-1:49
23M
23.00 mi15:55:314:36:5812:0316:05
12:51
+0:06
24M
24.00 mi16:09:134:50:4012:0713:42
13:42
+0:51
40K
24.85 mi16:20:445:02:1112:0911:31
13:28
-0:14
25.2M
25.20 mi16:25:565:07:2312:125:12
15:05
+1:37
Finish
26.22 mi16:37:525:19:1912:1111:56
11:43
-3:22

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

11:14 /mi

Average Pace

12:11 /mi

Slowest Pace

15:05 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:43:13

51% of race

Time at Steady Pace

1:51:07

35% of race

Time at Slower Pace

44:59

14% of race

Average Pace: 12:11 /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 mi11:53:3535:0211:1735:02
11:17
#25081
10K
6.21 mi12:29:591:11:2611:3036:24
11:43
#25030
15K
9.32 mi13:06:071:47:3411:3236:08
11:38
#24860
20K
12.43 mi13:42:102:23:3711:3336:03
11:36
#24580
Half
13.11 mi13:49:502:31:1711:327:40
11:14
#24545
25K
15.53 mi14:18:573:00:2411:3729:07
12:01
#24313
30K
18.64 mi14:57:513:39:1811:4638:54
12:31
#24070
20M
20.00 mi15:15:203:56:4711:5017:29
12:52
#23998
21M
21.00 mi15:29:544:11:2111:5814:34
14:34
#23939
35K
21.75 mi15:39:264:20:5312:009:32
12:45
#23913
23M
23.00 mi15:55:314:36:5812:0316:05
12:51
#23841
24M
24.00 mi16:09:134:50:4012:0713:42
13:42
#23842
40K
24.85 mi16:20:445:02:1112:0911:31
13:28
#23830
25.2M
25.20 mi16:25:565:07:2312:125:12
15:05
#23824
Finish
26.22 mi16:37:525:19:1912:1111:56
11:43
#23807
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi25081106211062124413(Top 96%)10219(Top 94%)10219(Top 583%)
10K6.21 mi3.10 mi25030+5110582+3910582+3924949(Top 98%)10538(Top 96%)10538(Top 601%)
15K9.32 mi3.11 mi24860+17010481+10110481+10124413(Top 96%)10219(Top 94%)10219(Top 583%)
20K12.43 mi3.11 mi24580+28010305+17610305+17623506(Top 92%)9731(Top 89%)9731(Top 555%)
Half13.11 mi0.68 mi24545+3510284+2110284+2123826(Top 93%)9958(Top 91%)9958(Top 568%)
25K15.53 mi2.42 mi24313+23210165+11910165+11923163(Top 91%)9624(Top 88%)9624(Top 549%)
30K18.64 mi3.11 mi24070+24310056+10910056+10922713(Top 89%)9507(Top 87%)9507(Top 542%)
20M20.00 mi1.36 mi23998+7210037+1910037+1922703(Top 89%)9614(Top 88%)9614(Top 548%)
21M21.00 mi1.00 mi23939+5910020+1710020+1723070(Top 90%)9823(Top 90%)9823(Top 560%)
35K21.75 mi0.75 mi23913+2610013+710013+722949(Top 90%)9803(Top 90%)9803(Top 559%)
23M23.00 mi1.25 mi23841+729987+269987+2622298(Top 87%)9504(Top 87%)9504(Top 542%)
24M24.00 mi1.00 mi23842-19998-119998-1123886(Top 93%)10303(Top 94%)10303(Top 588%)
40K24.85 mi0.85 mi23830+129997+19997+122976(Top 90%)9919(Top 91%)9919(Top 566%)
25.2M25.20 mi0.35 mi23824+69999-29999-223127(Top 91%)9986(Top 91%)9986(Top 570%)
Finish26.22 mi1.02 mi23807+1710002-310002-322813(Top 89%)9855(Top 90%)9855(Top 562%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 96%
×21story building
+97ft-345ft

Overall

24413

Females

10219

F45-49

10219

5K→10K

3.1 - 6.2 mi

Top 98%
×5story building
+79ft-138ft

Overall

24949

Females

10538

F45-49

10538

10K→15K

6.2 - 9.3 mi

Top 96%
×3story building
+67ft-78ft

Overall

24413

Females

10219

F45-49

10219

15K→20K

9.3 - 12.4 mi

Top 92%
×5story building
+106ft-86ft

Overall

23506

Females

9731

F45-49

9731

20K→Half

12.4 - 13.1 mi

Top 93%
×2story building
+19ft-37ft

Overall

23826

Females

9958

F45-49

9958

Half→25K

13.1 - 15.5 mi

Top 91%
×4story building
+66ft-88ft

Overall

23163

Females

9624

F45-49

9624

25K→30K

15.5 - 18.6 mi

Top 89%
×9story building
+181ft-148ft

Overall

22713

Females

9507

F45-49

9507

30K→20M

18.6 - 20.0 mi

Top 89%
×5story building
+64ft-50ft

Overall

22703

Females

9614

F45-49

9614

20M→21M

20.0 - 21.0 mi

Top 90%
×8story building
+106ft-24ft

Overall

23070

Females

9823

F45-49

9823

21M→35K

21.0 - 21.8 mi

Top 90%
×7story building
+17ft-86ft

Overall

22949

Females

9803

F45-49

9803

35K→23M

21.8 - 23.0 mi

Top 87%
×5story building
+23ft-63ft

Overall

22298

Females

9504

F45-49

9504

23M→24M

23.0 - 24.0 mi

Top 93%
×6story building
+12ft-82ft

Overall

23886

Females

10303

F45-49

10303

24M→40K

24.0 - 24.9 mi

Top 90%
×1story
+6ft-20ft

Overall

22976

Females

9919

F45-49

9919

40K→25.2M

24.9 - 25.2 mi

Top 91%
×1story
+13ft-16ft

Overall

23127

Females

9986

F45-49

9986

25.2M→Finish

25.2 - 26.2 mi

Top 89%
×2story building
+22ft-21ft

Overall

22813

Females

9855

F45-49

9855

Passing Analysis

Category:
Athletes Passed
1498
Passed By
224
Net Change
+1274
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#25081
5K → 10K11160+51#25081#25030
10K → 15K18010+170#25030#24860
15K → 20K2866+280#24860#24580
20K → Half4510+35#24580#24545
Half → 25K2342+232#24545#24313
25K → 30K25714+243#24313#24070
30K → 20M797+72#24070#23998
20M → 21M7314+59#23998#23939
21M → 35K3711+26#23939#23913
35K → 23M8311+72#23913#23841
23M → 24M3334-1#23841#23842
24M → 40K3018+12#23842#23830
40K → 25.2M137+6#23830#23824
25.2M → Finish3720+17#23824#23807
TOTALS1498224+1274
📊

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