Boston Marathon logo
BOSTON MARATHON 2023

Kaon Lai

Bib: 30078•F

NY

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Gender (Female)
#0 / 11423
Division (F18-39)
#0 / 4884
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
11:10/mi
34:41
↑ 97↓ 3451.5%
10K· 6.21 mi
11:32/mi
1:10:32
↑ 79↓ 1380.4%
15K· 9.32 mi
12:08/mi
1:48:14
↑ 67↓ 78
20K· 12.43 mi
12:36/mi
2:27:24
↑ 106↓ 860.1%
Half· 13.11 mi
12:29/mi
2:35:55
↑ 19↓ 370.5%
25K· 15.53 mi
13:05/mi
3:07:39
↑ 66↓ 880.2%
30K· 18.64 mi
13:01/mi
3:48:05
↑ 181↓ 1480.2%
20M
12:53/mi
4:05:36
↑ 64↓ 500.2%
21M
13:51/mi
4:19:27
↑ 106↓ 241.6%
35K· 21.75 mi
11:36/mi
4:28:08
↑ 17↓ 861.7%
23M
12:28/mi
4:43:45
↑ 23↓ 630.6%
24M
12:37/mi
4:56:22
↓ 821.3%
40K· 24.85 mi
13:20/mi
5:07:46
↓ 200.3%
25.2M
16:23/mi
5:13:25
↑ 13↓ 160.2%
Finish· 26.22 mi
12:46/mi
5:26:26
↑ 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
Time2:35:55
Pace11:54 /mi
2nd Half
Distance13.11 mi
Time2:50:31
Pace13:00 /mi
📊Positive Split: 9.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:53:0734:4111:1034:41
11:10
-
10K
6.21 mi12:28:581:10:3211:2135:51
11:32
+0:22
15K
9.32 mi13:06:401:48:1411:3737:42
12:08
+0:36
20K
12.43 mi13:45:502:27:2411:5239:10
12:36
+0:28
Half
13.11 mi13:54:212:35:5511:548:31
12:29
-0:07
25K
15.53 mi14:26:053:07:3912:0531:44
13:05
+0:36
30K
18.64 mi15:06:313:48:0512:1440:26
13:01
-0:04
20M
20.00 mi15:24:024:05:3612:1717:31
12:53
-0:08
21M
21.00 mi15:37:534:19:2712:2113:51
13:51
+0:58
35K
21.75 mi15:46:344:28:0812:208:41
11:36
-2:15
23M
23.00 mi16:02:114:43:4512:2015:37
12:28
+0:52
24M
24.00 mi16:14:484:56:2212:2112:37
12:37
+0:09
40K
24.85 mi16:26:125:07:4612:2311:24
13:20
+0:43
25.2M
25.20 mi16:31:515:13:2512:265:39
16:23
+3:03
Finish
26.22 mi16:44:525:26:2612:2813:01
12:46
-3:37

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

11:10 /mi

Average Pace

12:28 /mi

Slowest Pace

16:23 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:19:13

24% of race

Time at Steady Pace

3:36:19

66% of race

Time at Slower Pace

30:54

9% of race

Average Pace: 12:27 /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 mi11:53:0734:4111:1034:41
11:10
#25900
10K
6.21 mi12:28:581:10:3211:2135:51
11:32
#25974
15K
9.32 mi13:06:401:48:1411:3737:42
12:08
#26057
20K
12.43 mi13:45:502:27:2411:5239:10
12:36
#26076
Half
13.11 mi13:54:212:35:5511:548:31
12:29
#26078
25K
15.53 mi14:26:053:07:3912:0531:44
13:05
#26067
30K
18.64 mi15:06:313:48:0512:1440:26
13:01
#25974
20M
20.00 mi15:24:024:05:3612:1717:31
12:53
#25919
21M
21.00 mi15:37:534:19:2712:2113:51
13:51
#25871
35K
21.75 mi15:46:344:28:0812:208:41
11:36
#25837
23M
23.00 mi16:02:114:43:4512:2015:37
12:28
#25784
24M
24.00 mi16:14:484:56:2212:2112:37
12:37
#25772
40K
24.85 mi16:26:125:07:4612:2311:24
13:20
#25761
25.2M
25.20 mi16:31:515:13:2512:265:39
16:23
#25780
Finish
26.22 mi16:44:525:26:2612:2813:01
12:46
#25785
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi25900109891098926142(Top 98%)11127(Top 97%)11127(Top 228%)
10K6.21 mi3.10 mi25974-7411027-3811027-3825998(Top 98%)11040(Top 97%)11040(Top 226%)
15K9.32 mi3.11 mi26057-8311074-4711074-4726142(Top 98%)11127(Top 97%)11127(Top 228%)
20K12.43 mi3.11 mi26076-1911088-1411088-1426028(Top 98%)11075(Top 97%)11075(Top 227%)
Half13.11 mi0.68 mi26078-211094-611094-626152(Top 98%)11150(Top 98%)11150(Top 228%)
25K15.53 mi2.42 mi26067+1111084+1011084+1025917(Top 97%)11034(Top 97%)11034(Top 226%)
30K18.64 mi3.11 mi25974+9311040+4411040+4425426(Top 96%)10804(Top 95%)10804(Top 221%)
20M20.00 mi1.36 mi25919+5511005+3511005+3525086(Top 94%)10648(Top 93%)10648(Top 218%)
21M21.00 mi1.00 mi25871+4810986+1910986+1924919(Top 94%)10568(Top 93%)10568(Top 216%)
35K21.75 mi0.75 mi25837+3410967+1910967+1924244(Top 91%)10257(Top 90%)10257(Top 210%)
23M23.00 mi1.25 mi25784+5310947+2010947+2024563(Top 92%)10424(Top 91%)10424(Top 213%)
24M24.00 mi1.00 mi25772+1210942+510942+525181(Top 95%)10772(Top 94%)10772(Top 221%)
40K24.85 mi0.85 mi25761+1110944-210944-225226(Top 95%)10786(Top 94%)10786(Top 221%)
25.2M25.20 mi0.35 mi25780-1910953-910953-926237(Top 99%)11271(Top 99%)11271(Top 231%)
Finish26.22 mi1.02 mi25785-510959-610959-625841(Top 97%)11093(Top 97%)11093(Top 227%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 98%
×21story building
+97ft-345ft

Overall

26142

Females

11127

F18-39

11127

5K→10K

3.1 - 6.2 mi

Top 98%
×5story building
+79ft-138ft

Overall

25998

Females

11040

F18-39

11040

10K→15K

6.2 - 9.3 mi

Top 98%
×3story building
+67ft-78ft

Overall

26142

Females

11127

F18-39

11127

15K→20K

9.3 - 12.4 mi

Top 98%
×5story building
+106ft-86ft

Overall

26028

Females

11075

F18-39

11075

20K→Half

12.4 - 13.1 mi

Top 98%
×2story building
+19ft-37ft

Overall

26152

Females

11150

F18-39

11150

Half→25K

13.1 - 15.5 mi

Top 97%
×4story building
+66ft-88ft

Overall

25917

Females

11034

F18-39

11034

25K→30K

15.5 - 18.6 mi

Top 96%
×9story building
+181ft-148ft

Overall

25426

Females

10804

F18-39

10804

30K→20M

18.6 - 20.0 mi

Top 94%
×5story building
+64ft-50ft

Overall

25086

Females

10648

F18-39

10648

20M→21M

20.0 - 21.0 mi

Top 94%
×8story building
+106ft-24ft

Overall

24919

Females

10568

F18-39

10568

21M→35K

21.0 - 21.8 mi

Top 91%
×7story building
+17ft-86ft

Overall

24244

Females

10257

F18-39

10257

35K→23M

21.8 - 23.0 mi

Top 92%
×5story building
+23ft-63ft

Overall

24563

Females

10424

F18-39

10424

23M→24M

23.0 - 24.0 mi

Top 95%
×6story building
+12ft-82ft

Overall

25181

Females

10772

F18-39

10772

24M→40K

24.0 - 24.9 mi

Top 95%
×1story
+6ft-20ft

Overall

25226

Females

10786

F18-39

10786

40K→25.2M

24.9 - 25.2 mi

Top 99%
×1story
+13ft-16ft

Overall

26237

Females

11271

F18-39

11271

25.2M→Finish

25.2 - 26.2 mi

Top 97%
×2story building
+22ft-21ft

Overall

25841

Females

11093

F18-39

11093

Passing Analysis

Category:
Athletes Passed
563
Passed By
448
Net Change
+115
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#25900
5K → 10K76150-74#25900#25974
10K → 15K31114-83#25974#26057
15K → 20K4766-19#26057#26076
20K → Half1012-2#26076#26078
Half → 25K4231+11#26078#26067
25K → 30K10714+93#26067#25974
30K → 20M583+55#25974#25919
20M → 21M513+48#25919#25871
21M → 35K340+34#25871#25837
35K → 23M552+53#25837#25784
23M → 24M186+12#25784#25772
24M → 40K2211+11#25772#25761
40K → 25.2M221-19#25761#25780
25.2M → Finish1015-5#25780#25785
TOTALS563448+115
📊

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