Boston Marathon logo
BOSTON MARATHON 2023

Simon Kwok

Bib: 30141•M

MA

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Gender (Male)
#0 / 15176
Division (M18-39)
#0 / 5285
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
34:21
Rank: #25764
Start → 5K
34:21 | 11:03/mi
10K· 6.21 mi
1:08:55
Rank: #25714 (+50)
5K → 10K
34:34 | 11:08/mi
15K· 9.32 mi
1:44:24
Rank: #25699 (+15)
10K → 15K
35:29 | 11:25/mi
20K· 12.43 mi
2:24:15
Rank: #25888 (-189)
15K → 20K
39:51 | 12:50/mi
Half· 13.11 mi
2:32:14
Rank: #25878 (+10)
20K → Half
7:59 | 11:42/mi
25K· 15.53 mi
3:01:45
Rank: #25785 (+93)
Half → 25K
29:31 | 12:10/mi
30K· 18.64 mi
3:40:36
Rank: #25664 (+121)
25K → 30K
38:51 | 12:30/mi
20M
3:56:10
Rank: #25539 (+125)
30K → 20M
15:34 | 11:27/mi
21M
4:10:48
Rank: #25551 (-12)
20M → 21M
14:38 | 14:38/mi
35K· 21.75 mi
4:20:37
Rank: #25556 (-5)
21M → 35K
9:49 | 13:07/mi
23M
4:34:34
Rank: #25454 (+102)
35K → 23M
13:57 | 11:08/mi
24M
4:46:06
Rank: #25411 (+43)
23M → 24M
11:32 | 11:32/mi
40K· 24.85 mi
4:55:26
Rank: #25327 (+84)
24M → 40K
9:20 | 10:55/mi
25.2M
5:00:16
Rank: #25330 (-3)
40K → 25.2M
4:50 | 14:01/mi
Finish· 26.22 mi
5:11:15
Rank: #25288 (+42)
25.2M → Finish
10:59 | 10:47/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
Time2:32:14
Pace11:37 /mi
2nd Half
Distance13.11 mi
Time2:39:01
Pace12:08 /mi
📊Positive Split: 4.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:56:3234:2111:0334:21
11:03
-
10K
6.21 mi12:31:061:08:5511:0534:34
11:08
+0:05
15K
9.32 mi13:06:351:44:2411:1235:29
11:25
+0:17
20K
12.43 mi13:46:262:24:1511:3639:51
12:50
+1:25
Half
13.11 mi13:54:252:32:1411:377:59
11:42
-1:08
25K
15.53 mi14:23:563:01:4511:4229:31
12:10
+0:28
30K
18.64 mi15:02:473:40:3611:5038:51
12:30
+0:20
20M
20.00 mi15:18:213:56:1011:4815:34
11:27
-1:03
21M
21.00 mi15:32:594:10:4811:5714:38
14:38
+3:11
35K
21.75 mi15:42:484:20:3711:599:49
13:07
-1:31
23M
23.00 mi15:56:454:34:3411:5613:57
11:08
-1:59
24M
24.00 mi16:08:174:46:0611:5511:32
11:32
+0:24
40K
24.85 mi16:17:374:55:2611:539:20
10:55
-0:37
25.2M
25.20 mi16:22:275:00:1611:554:50
14:01
+3:06
Finish
26.22 mi16:33:265:11:1511:5310:59
10:47
-3:14

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

10:47 /mi

Average Pace

11:53 /mi

Slowest Pace

14:38 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

20:19

7% of race

Time at Steady Pace

2:33:26

49% of race

Time at Slower Pace

2:17:30

44% of race

Average Pace: 11:52 /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 mi11:56:3234:2111:0334:21
11:03
#25764
10K
6.21 mi12:31:061:08:5511:0534:34
11:08
#25714
15K
9.32 mi13:06:351:44:2411:1235:29
11:25
#25699
20K
12.43 mi13:46:262:24:1511:3639:51
12:50
#25888
Half
13.11 mi13:54:252:32:1411:377:59
11:42
#25878
25K
15.53 mi14:23:563:01:4511:4229:31
12:10
#25785
30K
18.64 mi15:02:473:40:3611:5038:51
12:30
#25664
20M
20.00 mi15:18:213:56:1011:4815:34
11:27
#25539
21M
21.00 mi15:32:594:10:4811:5714:38
14:38
#25551
35K
21.75 mi15:42:484:20:3711:599:49
13:07
#25556
23M
23.00 mi15:56:454:34:3411:5613:57
11:08
#25454
24M
24.00 mi16:08:174:46:0611:5511:32
11:32
#25411
40K
24.85 mi16:17:374:55:2611:539:20
10:55
#25327
25.2M
25.20 mi16:22:275:00:1611:554:50
14:01
#25330
Finish
26.22 mi16:33:265:11:1511:5310:59
10:47
#25288
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi25764148441484425637(Top 96%)14786(Top 97%)14786(Top 280%)
10K6.21 mi3.10 mi25714+5014823+2114823+2125600(Top 96%)14782(Top 97%)14782(Top 280%)
15K9.32 mi3.11 mi25699+1514822+114822+125637(Top 96%)14786(Top 97%)14786(Top 280%)
20K12.43 mi3.11 mi25888-18914900-7814900-7826152(Top 98%)14990(Top 99%)14990(Top 284%)
Half13.11 mi0.68 mi25878+1014894+614894+625640(Top 96%)14746(Top 97%)14746(Top 279%)
25K15.53 mi2.42 mi25785+9314842+5214842+5225293(Top 95%)14588(Top 96%)14588(Top 276%)
30K18.64 mi3.11 mi25664+12114778+6414778+6425004(Top 94%)14416(Top 95%)14416(Top 273%)
20M20.00 mi1.36 mi25539+12514718+6014718+6023460(Top 88%)13676(Top 90%)13676(Top 259%)
21M21.00 mi1.00 mi25551-1214717+114717+125499(Top 96%)14620(Top 96%)14620(Top 277%)
35K21.75 mi0.75 mi25556-514718-114718-125645(Top 96%)14654(Top 97%)14654(Top 277%)
23M23.00 mi1.25 mi25454+10214664+5414664+5422625(Top 85%)13214(Top 87%)13214(Top 250%)
24M24.00 mi1.00 mi25411+4314642+2214642+2223921(Top 90%)13777(Top 91%)13777(Top 261%)
40K24.85 mi0.85 mi25327+8414597+4514597+4522180(Top 83%)12934(Top 85%)12934(Top 245%)
25.2M25.20 mi0.35 mi25330-314598-114598-125021(Top 94%)14292(Top 94%)14292(Top 270%)
Finish26.22 mi1.02 mi25288+4214574+2414574+2423572(Top 89%)13612(Top 90%)13612(Top 258%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 96%
×21stories
+97ft-345ft

Overall

25637

Males

14786

M18-39

14786

5K→10K

3.1 - 6.2 mi

Top 96%
×5stories
+79ft-138ft

Overall

25600

Males

14782

M18-39

14782

10K→15K

6.2 - 9.3 mi

Top 96%
×3stories
+67ft-78ft

Overall

25637

Males

14786

M18-39

14786

15K→20K

9.3 - 12.4 mi

Top 98%
×5stories
+106ft-86ft

Overall

26152

Males

14990

M18-39

14990

20K→Half

12.4 - 13.1 mi

Top 96%
×2stories
+19ft-37ft

Overall

25640

Males

14746

M18-39

14746

Half→25K

13.1 - 15.5 mi

Top 95%
×4stories
+66ft-88ft

Overall

25293

Males

14588

M18-39

14588

25K→30K

15.5 - 18.6 mi

Top 94%
×9stories
+181ft-148ft

Overall

25004

Males

14416

M18-39

14416

30K→20M

18.6 - 20.0 mi

Top 88%
×5stories
+64ft-50ft

Overall

23460

Males

13676

M18-39

13676

20M→21M

20.0 - 21.0 mi

Top 96%
×8stories
+106ft-24ft

Overall

25499

Males

14620

M18-39

14620

21M→35K

21.0 - 21.8 mi

Top 96%
×7stories
+17ft-86ft

Overall

25645

Males

14654

M18-39

14654

35K→23M

21.8 - 23.0 mi

Top 85%
×5stories
+23ft-63ft

Overall

22625

Males

13214

M18-39

13214

23M→24M

23.0 - 24.0 mi

Top 90%
×6stories
+12ft-82ft

Overall

23921

Males

13777

M18-39

13777

24M→40K

24.0 - 24.9 mi

Top 83%
×1story
+6ft-20ft

Overall

22180

Males

12934

M18-39

12934

40K→25.2M

24.9 - 25.2 mi

Top 94%
×1story
+13ft-16ft

Overall

25021

Males

14292

M18-39

14292

25.2M→Finish

25.2 - 26.2 mi

Top 89%
×2stories
+22ft-21ft

Overall

23572

Males

13612

M18-39

13612

Passing Analysis

Category:
Athletes Passed
968
Passed By
492
Net Change
+476
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#25764
5K → 10K14696+50#25764#25714
10K → 15K10691+15#25714#25699
15K → 20K18207-189#25699#25888
20K → Half188+10#25888#25878
Half → 25K10310+93#25878#25785
25K → 30K13514+121#25785#25664
30K → 20M1250+125#25664#25539
20M → 21M1931-12#25539#25551
21M → 35K1621-5#25551#25556
35K → 23M1020+102#25556#25454
23M → 24M463+43#25454#25411
24M → 40K840+84#25411#25327
40K → 25.2M710-3#25327#25330
25.2M → Finish431+42#25330#25288
TOTALS968492+476
📊

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