Boston Marathon logo
BOSTON MARATHON 2023

Kang Yong Lee

Bib: 21228•M

CA

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M65-69)
#0 / 549
Top 35%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
27:19
Rank: #19412
Start → 5K
27:19 | 8:48/mi
10K· 6.21 mi
54:12
Rank: #19244 (+168)
5K → 10K
26:53 | 8:39/mi
15K· 9.32 mi
1:21:23
Rank: #19214 (+30)
10K → 15K
27:11 | 8:45/mi
20K· 12.43 mi
1:48:43
Rank: #19054 (+160)
15K → 20K
27:20 | 8:48/mi
Half· 13.11 mi
1:54:38
Rank: #19045 (+9)
20K → Half
5:55 | 8:40/mi
25K· 15.53 mi
2:16:00
Rank: #18871 (+174)
Half → 25K
21:22 | 8:49/mi
30K· 18.64 mi
2:44:08
Rank: #18611 (+260)
25K → 30K
28:08 | 9:03/mi
20M
2:56:45
Rank: #18536 (+75)
30K → 20M
12:37 | 9:17/mi
21M
3:06:21
Rank: #18388 (+148)
20M → 21M
9:36 | 9:36/mi
35K· 21.75 mi
3:13:08
Rank: #18379 (+9)
21M → 35K
6:47 | 9:04/mi
23M
3:24:41
Rank: #18305 (+74)
35K → 23M
11:33 | 9:13/mi
24M
3:33:38
Rank: #18242 (+63)
23M → 24M
8:57 | 8:57/mi
40K· 24.85 mi
3:41:37
Rank: #18241 (+1)
24M → 40K
7:59 | 9:20/mi
25.2M
3:45:16
Rank: #18266 (-25)
40K → 25.2M
3:39 | 10:35/mi
Finish· 26.22 mi
3:54:40
Rank: #18309 (-43)
25.2M → Finish
9:24 | 9:13/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
Time1:54:38
Pace8:45 /mi
2nd Half
Distance13.11 mi
Time2:00:02
Pace9:09 /mi
📊Positive Split: 4.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:46:0927:198:4827:19
8:48
-
10K
6.21 mi12:13:0254:128:4326:53
8:39
-0:09
15K
9.32 mi12:40:131:21:238:4427:11
8:45
+0:06
20K
12.43 mi13:07:331:48:438:4527:20
8:48
+0:03
Half
13.11 mi13:13:281:54:388:455:55
8:40
-0:08
25K
15.53 mi13:34:502:16:008:4521:22
8:49
+0:09
30K
18.64 mi14:02:582:44:088:4828:08
9:03
+0:14
20M
20.00 mi14:15:352:56:458:5012:37
9:17
+0:14
21M
21.00 mi14:25:113:06:218:529:36
9:36
+0:19
35K
21.75 mi14:31:583:13:088:536:47
9:04
-0:32
23M
23.00 mi14:43:313:24:418:5411:33
9:13
+0:09
24M
24.00 mi14:52:283:33:388:548:57
8:57
-0:16
40K
24.85 mi15:00:273:41:378:557:59
9:20
+0:23
25.2M
25.20 mi15:04:063:45:168:563:39
10:35
+1:15
Finish
26.22 mi15:13:303:54:408:579:24
9:13
-1:22

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

8:39 /mi

Average Pace

8:57 /mi

Slowest Pace

10:35 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:54:38

49% of race

Time at Steady Pace

1:38:48

42% of race

Time at Slower Pace

21:14

9% of race

Average Pace: 8:57 /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 mi11:46:0927:198:4827:19
8:48
#19412
10K
6.21 mi12:13:0254:128:4326:53
8:39
#19244
15K
9.32 mi12:40:131:21:238:4427:11
8:45
#19214
20K
12.43 mi13:07:331:48:438:4527:20
8:48
#19054
Half
13.11 mi13:13:281:54:388:455:55
8:40
#19045
25K
15.53 mi13:34:502:16:008:4521:22
8:49
#18871
30K
18.64 mi14:02:582:44:088:4828:08
9:03
#18611
20M
20.00 mi14:15:352:56:458:5012:37
9:17
#18536
21M
21.00 mi14:25:113:06:218:529:36
9:36
#18388
35K
21.75 mi14:31:583:13:088:536:47
9:04
#18379
23M
23.00 mi14:43:313:24:418:5411:33
9:13
#18305
24M
24.00 mi14:52:283:33:388:548:57
8:57
#18242
40K
24.85 mi15:00:273:41:378:557:59
9:20
#18241
25.2M
25.20 mi15:04:063:45:168:563:39
10:35
#18266
Finish
26.22 mi15:13:303:54:408:579:24
9:13
#18309
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM65-69Seg. OverallSeg. MalesSeg. M65-69
5K3.11 mi3.11 mi19412119421194219219(Top 72%)11971(Top 79%)11971(Top 2181%)
10K6.21 mi3.10 mi19244+16811920+2211920+2219136(Top 72%)11951(Top 79%)11951(Top 2177%)
15K9.32 mi3.11 mi19214+3011936-1611936-1619219(Top 72%)11971(Top 79%)11971(Top 2181%)
20K12.43 mi3.11 mi19054+16011884+5211884+5218653(Top 70%)11747(Top 77%)11747(Top 2140%)
Half13.11 mi0.68 mi19045+911876+811876+818740(Top 70%)11795(Top 78%)11795(Top 2148%)
25K15.53 mi2.42 mi18871+17411803+7311803+7318018(Top 68%)11439(Top 75%)11439(Top 2084%)
30K18.64 mi3.11 mi18611+26011664+13911664+13917462(Top 66%)11113(Top 73%)11113(Top 2024%)
20M20.00 mi1.36 mi18536+7511626+3811626+3817936(Top 67%)11207(Top 74%)11207(Top 2041%)
21M21.00 mi1.00 mi18388+14811547+7911547+7916412(Top 62%)10537(Top 69%)10537(Top 1919%)
35K21.75 mi0.75 mi18379+911534+1311534+1318149(Top 68%)11212(Top 74%)11212(Top 2042%)
23M23.00 mi1.25 mi18305+7411490+4411490+4417168(Top 64%)10771(Top 71%)10771(Top 1962%)
24M24.00 mi1.00 mi18242+6311458+3211458+3216987(Top 64%)10623(Top 70%)10623(Top 1935%)
40K24.85 mi0.85 mi18241+111441+1711441+1717674(Top 66%)10878(Top 72%)10878(Top 1981%)
25.2M25.20 mi0.35 mi18266-2511447-611447-619321(Top 73%)11612(Top 77%)11612(Top 2115%)
Finish26.22 mi1.02 mi18309-4311462-1511462-1519015(Top 71%)11552(Top 76%)11552(Top 2104%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 72%
×21stories
+97ft-345ft

Overall

19219

Males

11971

M65-69

11971

5K→10K

3.1 - 6.2 mi

Top 72%
×5stories
+79ft-138ft

Overall

19136

Males

11951

M65-69

11951

10K→15K

6.2 - 9.3 mi

Top 72%
×3stories
+67ft-78ft

Overall

19219

Males

11971

M65-69

11971

15K→20K

9.3 - 12.4 mi

Top 70%
×5stories
+106ft-86ft

Overall

18653

Males

11747

M65-69

11747

20K→Half

12.4 - 13.1 mi

Top 70%
×2stories
+19ft-37ft

Overall

18740

Males

11795

M65-69

11795

Half→25K

13.1 - 15.5 mi

Top 68%
×4stories
+66ft-88ft

Overall

18018

Males

11439

M65-69

11439

25K→30K

15.5 - 18.6 mi

Top 66%
×9stories
+181ft-148ft

Overall

17462

Males

11113

M65-69

11113

30K→20M

18.6 - 20.0 mi

Top 67%
×5stories
+64ft-50ft

Overall

17936

Males

11207

M65-69

11207

20M→21M

20.0 - 21.0 mi

Top 62%
×8stories
+106ft-24ft

Overall

16412

Males

10537

M65-69

10537

21M→35K

21.0 - 21.8 mi

Top 68%
×7stories
+17ft-86ft

Overall

18149

Males

11212

M65-69

11212

35K→23M

21.8 - 23.0 mi

Top 64%
×5stories
+23ft-63ft

Overall

17168

Males

10771

M65-69

10771

23M→24M

23.0 - 24.0 mi

Top 64%
×6stories
+12ft-82ft

Overall

16987

Males

10623

M65-69

10623

24M→40K

24.0 - 24.9 mi

Top 66%
×1story
+6ft-20ft

Overall

17674

Males

10878

M65-69

10878

40K→25.2M

24.9 - 25.2 mi

Top 73%
×1story
+13ft-16ft

Overall

19321

Males

11612

M65-69

11612

25.2M→Finish

25.2 - 26.2 mi

Top 71%
×2stories
+22ft-21ft

Overall

19015

Males

11552

M65-69

11552

Passing Analysis

Category:
Athletes Passed
2075
Passed By
972
Net Change
+1103
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#19412
5K → 10K433265+168#19412#19244
10K → 15K195165+30#19244#19214
15K → 20K24989+160#19214#19054
20K → Half3122+9#19054#19045
Half → 25K20733+174#19045#18871
25K → 30K31151+260#18871#18611
30K → 20M12752+75#18611#18536
20M → 21M17224+148#18536#18388
21M → 35K4940+9#18388#18379
35K → 23M12046+74#18379#18305
23M → 24M8118+63#18305#18242
24M → 40K5554+1#18242#18241
40K → 25.2M1843-25#18241#18266
25.2M → Finish2770-43#18266#18309
TOTALS2075972+1103
📊

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