Boston Marathon logo
BOSTON MARATHON 2024

Chang Hoon Lee

Bib: 8749•M

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 25550
Top 32%
Gender (Male)
#0 / 14578
Top 43%
Division (M18-39)
#0 / 4849
Race Day Weather
55°/45°F
scattered clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
19:44
Rank: #2414
Start → 5K
19:44 | 6:21/mi
10K· 6.21 mi
39:54
Rank: #2648 (-234)
5K → 10K
20:10 | 6:29/mi
15K· 9.32 mi
1:00:31
Rank: #2915 (-267)
10K → 15K
20:37 | 6:38/mi
20K· 12.43 mi
1:22:00
Rank: #3263 (-348)
15K → 20K
21:29 | 6:55/mi
Half· 13.11 mi
1:26:43
Rank: #3362 (-99)
20K → Half
4:43 | 6:55/mi
25K· 15.53 mi
1:48:00
Rank: #5418 (-2056)
Half → 25K
21:17 | 8:47/mi
30K· 18.64 mi
2:15:37
Rank: #6637 (-1219)
25K → 30K
27:37 | 8:53/mi
20M
2:27:59
Rank: #7066 (-429)
30K → 20M
12:22 | 9:06/mi
21M
2:38:14
Rank: #7474 (-408)
20M → 21M
10:15 | 10:15/mi
35K· 21.75 mi
2:45:39
Rank: #7875 (-401)
21M → 35K
7:25 | 9:55/mi
23M
2:57:50
Rank: #8263 (-388)
35K → 23M
12:11 | 9:44/mi
24M
3:06:01
Rank: #8191 (+72)
23M → 24M
8:11 | 8:11/mi
40K· 24.85 mi
3:13:19
Rank: #8154 (+37)
24M → 40K
7:18 | 8:32/mi
25.2M
3:16:52
Rank: #8220 (-66)
40K → 25.2M
3:33 | 10:18/mi
Finish· 26.22 mi
3:24:57
Rank: #8171 (+49)
25.2M → Finish
8:05 | 7:56/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
Time1:26:43
Pace6:37 /mi
2nd Half
Distance13.11 mi
Time1:58:14
Pace9:01 /mi
📊Positive Split: 36.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:44:4819:446:2119:44
6:21
-
10K
6.21 mi11:04:5839:546:2520:10
6:29
+0:08
15K
9.32 mi11:25:351:00:316:3020:37
6:38
+0:09
20K
12.43 mi11:47:041:22:006:3621:29
6:55
+0:17
Half
13.11 mi11:51:471:26:436:374:43
6:55
0:00
25K
15.53 mi12:13:041:48:006:5721:17
8:47
+1:52
30K
18.64 mi12:40:412:15:377:1727:37
8:53
+0:06
20M
20.00 mi12:53:032:27:597:2412:22
9:06
+0:13
21M
21.00 mi13:03:182:38:147:3210:15
10:15
+1:09
35K
21.75 mi13:10:432:45:397:377:25
9:55
-0:20
23M
23.00 mi13:22:542:57:507:4412:11
9:44
-0:11
24M
24.00 mi13:31:053:06:017:458:11
8:11
-1:33
40K
24.85 mi13:38:233:13:197:477:18
8:32
+0:21
25.2M
25.20 mi13:41:563:16:527:493:33
10:18
+1:46
Finish
26.22 mi13:50:013:24:577:498:05
7:56
-2:22

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

6:21 /mi

Average Pace

7:49 /mi

Slowest Pace

10:18 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:26:43

42% of race

Time at Steady Pace

1:24:50

41% of race

Time at Slower Pace

33:24

16% of race

Average Pace: 7:49 /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 mi10:44:4819:446:2119:44
6:21
#2414
10K
6.21 mi11:04:5839:546:2520:10
6:29
#2648
15K
9.32 mi11:25:351:00:316:3020:37
6:38
#2915
20K
12.43 mi11:47:041:22:006:3621:29
6:55
#3263
Half
13.11 mi11:51:471:26:436:374:43
6:55
#3362
25K
15.53 mi12:13:041:48:006:5721:17
8:47
#5418
30K
18.64 mi12:40:412:15:377:1727:37
8:53
#6637
20M
20.00 mi12:53:032:27:597:2412:22
9:06
#7066
21M
21.00 mi13:03:182:38:147:3210:15
10:15
#7474
35K
21.75 mi13:10:432:45:397:377:25
9:55
#7875
23M
23.00 mi13:22:542:57:507:4412:11
9:44
#8263
24M
24.00 mi13:31:053:06:017:458:11
8:11
#8191
40K
24.85 mi13:38:233:13:197:477:18
8:32
#8154
25.2M
25.20 mi13:41:563:16:527:493:33
10:18
#8220
Finish
26.22 mi13:50:013:24:577:498:05
7:56
#8171
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi2414233023303500(Top 14%)3319(Top 23%)3319(Top 68%)
10K6.21 mi3.10 mi2648-2342548-2182548-2182953(Top 12%)2819(Top 19%)2819(Top 58%)
15K9.32 mi3.11 mi2915-2672791-2432791-2433500(Top 14%)3319(Top 23%)3319(Top 68%)
20K12.43 mi3.11 mi3263-3483106-3153106-3154736(Top 19%)4353(Top 30%)4353(Top 90%)
Half13.11 mi0.68 mi3362-993198-923198-925284(Top 21%)4798(Top 33%)4798(Top 99%)
25K15.53 mi2.42 mi5418-20564932-17344932-173414446(Top 57%)9549(Top 66%)9549(Top 197%)
30K18.64 mi3.11 mi6637-12195757-8255757-82512683(Top 50%)8553(Top 59%)8553(Top 176%)
20M20.00 mi1.36 mi7066-4296004-2476004-24712610(Top 49%)8225(Top 56%)8225(Top 170%)
21M21.00 mi1.00 mi7474-4086193-1896193-18913899(Top 54%)8598(Top 59%)8598(Top 177%)
35K21.75 mi0.75 mi7875-4016397-2046397-20416856(Top 66%)10030(Top 69%)10030(Top 207%)
23M23.00 mi1.25 mi8263-3886543-1466543-14614449(Top 57%)8774(Top 60%)8774(Top 181%)
24M24.00 mi1.00 mi8191+726459+846459+847634(Top 30%)5305(Top 36%)5305(Top 109%)
40K24.85 mi0.85 mi8154+376382+776382+778532(Top 33%)5673(Top 39%)5673(Top 117%)
25.2M25.20 mi0.35 mi8220-666394-126394-1212008(Top 47%)7369(Top 51%)7369(Top 152%)
Finish26.22 mi1.02 mi8171+496334+606334+608117(Top 32%)5455(Top 37%)5455(Top 112%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 14%
×21stories
+97ft-345ft

Overall

3500

Males

3319

M18-39

3319

5K→10K

3.1 - 6.2 mi

Top 12%
×5stories
+79ft-138ft

Overall

2953

Males

2819

M18-39

2819

10K→15K

6.2 - 9.3 mi

Top 14%
×3stories
+67ft-78ft

Overall

3500

Males

3319

M18-39

3319

15K→20K

9.3 - 12.4 mi

Top 19%
×5stories
+106ft-86ft

Overall

4736

Males

4353

M18-39

4353

20K→Half

12.4 - 13.1 mi

Top 21%
×2stories
+19ft-37ft

Overall

5284

Males

4798

M18-39

4798

Half→25K

13.1 - 15.5 mi

Top 57%
×4stories
+66ft-88ft

Overall

14446

Males

9549

M18-39

9549

25K→30K

15.5 - 18.6 mi

Top 50%
×9stories
+181ft-148ft

Overall

12683

Males

8553

M18-39

8553

30K→20M

18.6 - 20.0 mi

Top 49%
×5stories
+64ft-50ft

Overall

12610

Males

8225

M18-39

8225

20M→21M

20.0 - 21.0 mi

Top 54%
×8stories
+106ft-24ft

Overall

13899

Males

8598

M18-39

8598

21M→35K

21.0 - 21.8 mi

Top 66%
×7stories
+17ft-86ft

Overall

16856

Males

10030

M18-39

10030

35K→23M

21.8 - 23.0 mi

Top 57%
×5stories
+23ft-63ft

Overall

14449

Males

8774

M18-39

8774

23M→24M

23.0 - 24.0 mi

Top 30%
×6stories
+12ft-82ft

Overall

7634

Males

5305

M18-39

5305

24M→40K

24.0 - 24.9 mi

Top 33%
×1story
+6ft-20ft

Overall

8532

Males

5673

M18-39

5673

40K→25.2M

24.9 - 25.2 mi

Top 47%
×1story
+13ft-16ft

Overall

12008

Males

7369

M18-39

7369

25.2M→Finish

25.2 - 26.2 mi

Top 32%
×2stories
+22ft-21ft

Overall

8117

Males

5455

M18-39

5455

Passing Analysis

Category:
Athletes Passed
674
Passed By
6431
Net Change
-5757
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#2414
5K → 10K62296-234#2414#2648
10K → 15K35302-267#2648#2915
15K → 20K33381-348#2915#3263
20K → Half3102-99#3263#3362
Half → 25K42060-2056#3362#5418
25K → 30K291248-1219#5418#6637
30K → 20M37466-429#6637#7066
20M → 21M36444-408#7066#7474
21M → 35K22423-401#7474#7875
35K → 23M57445-388#7875#8263
23M → 24M12654+72#8263#8191
24M → 40K10366+37#8191#8154
40K → 25.2M3096-66#8154#8220
25.2M → Finish9748+49#8220#8171
TOTALS6746431-5757
📊

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