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BOSTON MARATHON 2025

Cheoljae Lee

Bib: 6979•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 29%
Gender (Male)
#0 / 16105
Top 42%
Masters (Masters Men)
#0 / 10463
Top 30%
Division (M50-54)
#0 / 1996
Top 28%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:36
Rank: #4869
Start → 5K
20:36 | 6:38/mi
10K· 6.21 mi
41:24
Rank: #5035 (-166)
5K → 10K
20:48 | 6:42/mi
15K· 9.32 mi
1:02:13
Rank: #5011 (+24)
10K → 15K
20:49 | 6:42/mi
20K· 12.43 mi
1:23:28
Rank: #5135 (-124)
15K → 20K
21:15 | 6:50/mi
Half· 13.11 mi
1:28:03
Rank: #5134 (+1)
20K → Half
4:35 | 6:43/mi
25K· 15.53 mi
1:44:45
Rank: #5206 (-72)
Half → 25K
16:42 | 6:53/mi
30K· 18.64 mi
2:07:54
Rank: #5683 (-477)
25K → 30K
23:09 | 7:27/mi
20M
2:19:01
Rank: #6070 (-387)
30K → 20M
11:07 | 8:11/mi
21M
2:29:51
Rank: #6959 (-889)
20M → 21M
10:50 | 10:50/mi
35K· 21.75 mi
2:36:33
Rank: #7305 (-346)
21M → 35K
6:42 | 8:57/mi
23M
2:47:47
Rank: #7770 (-465)
35K → 23M
11:14 | 8:58/mi
24M
2:56:12
Rank: #8036 (-266)
23M → 24M
8:25 | 8:25/mi
40K· 24.85 mi
3:02:44
Rank: #7997 (+39)
24M → 40K
6:32 | 7:38/mi
25.2M
3:06:01
Rank: #8108 (-111)
40K → 25.2M
3:17 | 9:31/mi
Finish· 26.22 mi
3:14:18
Rank: #8329 (-221)
25.2M → Finish
8:17 | 8:08/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:28:03
Pace6:43 /mi
2nd Half
Distance13.11 mi
Time1:46:15
Pace8:06 /mi
📊Positive Split: 20.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:26:5620:366:3820:36
6:38
-
10K
6.21 mi10:47:4441:246:4020:48
6:42
+0:04
15K
9.32 mi11:08:331:02:136:4120:49
6:42
0:00
20K
12.43 mi11:29:481:23:286:4321:15
6:50
+0:08
Half
13.11 mi11:34:231:28:036:434:35
6:43
-0:07
25K
15.53 mi11:51:051:44:456:4516:42
6:53
+0:10
30K
18.64 mi12:14:142:07:546:5223:09
7:27
+0:34
20M
20.00 mi12:25:212:19:016:5711:07
8:11
+0:44
21M
21.00 mi12:36:112:29:517:0810:50
10:50
+2:39
35K
21.75 mi12:42:532:36:337:126:42
8:57
-1:53
23M
23.00 mi12:54:072:47:477:1811:14
8:58
+0:01
24M
24.00 mi13:02:322:56:127:218:25
8:25
-0:33
40K
24.85 mi13:09:043:02:447:216:32
7:38
-0:47
25.2M
25.20 mi13:12:213:06:017:233:17
9:31
+1:53
Finish
26.22 mi13:20:383:14:187:258:17
8:08
-1:23

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

6:38 /mi

Average Pace

7:25 /mi

Slowest Pace

10:50 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:44:45

54% of race

Time at Steady Pace

49:05

25% of race

Time at Slower Pace

40:28

21% of race

Average Pace: 7:25 /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 mi10:26:5620:366:3820:36
6:38
#4869
10K
6.21 mi10:47:4441:246:4020:48
6:42
#5035
15K
9.32 mi11:08:331:02:136:4120:49
6:42
#5011
20K
12.43 mi11:29:481:23:286:4321:15
6:50
#5135
Half
13.11 mi11:34:231:28:036:434:35
6:43
#5134
25K
15.53 mi11:51:051:44:456:4516:42
6:53
#5206
30K
18.64 mi12:14:142:07:546:5223:09
7:27
#5683
20M
20.00 mi12:25:212:19:016:5711:07
8:11
#6070
21M
21.00 mi12:36:112:29:517:0810:50
10:50
#6959
35K
21.75 mi12:42:532:36:337:126:42
8:57
#7305
23M
23.00 mi12:54:072:47:477:1811:14
8:58
#7770
24M
24.00 mi13:02:322:56:127:218:25
8:25
#8036
40K
24.85 mi13:09:043:02:447:216:32
7:38
#7997
25.2M
25.20 mi13:12:213:06:017:233:17
9:31
#8108
Finish
26.22 mi13:20:383:14:187:258:17
8:08
#8329
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi4869455945595091(Top 18%)4726(Top 29%)4726(Top 237%)
10K6.21 mi3.10 mi5035-1664694-1354694-1355311(Top 19%)4923(Top 31%)4923(Top 247%)
15K9.32 mi3.11 mi5011+244671+234671+235091(Top 18%)4726(Top 29%)4726(Top 237%)
20K12.43 mi3.11 mi5135-1244764-934764-935702(Top 20%)5200(Top 32%)5200(Top 261%)
Half13.11 mi0.68 mi5134+1476447645493(Top 19%)5048(Top 31%)5048(Top 253%)
25K15.53 mi2.42 mi5206-724820-564820-565584(Top 20%)5061(Top 31%)5061(Top 254%)
30K18.64 mi3.11 mi5683-4775184-3645184-3647388(Top 26%)6212(Top 39%)6212(Top 311%)
20M20.00 mi1.36 mi6070-3875477-2935477-29311661(Top 41%)8351(Top 52%)8351(Top 418%)
21M21.00 mi1.00 mi6959-8896127-6506127-65020919(Top 74%)12450(Top 77%)12450(Top 624%)
35K21.75 mi0.75 mi7305-3466335-2086335-20817980(Top 63%)11033(Top 69%)11033(Top 553%)
23M23.00 mi1.25 mi7770-4656589-2546589-25416080(Top 57%)10098(Top 63%)10098(Top 506%)
24M24.00 mi1.00 mi8036-2666721-1326721-13213952(Top 49%)9102(Top 57%)9102(Top 456%)
40K24.85 mi0.85 mi7997+396669+526669+527686(Top 27%)5824(Top 36%)5824(Top 292%)
25.2M25.20 mi0.35 mi8108-1116730-616730-6114600(Top 51%)9193(Top 57%)9193(Top 461%)
Finish26.22 mi1.02 mi8329-2216825-956825-9513755(Top 48%)8879(Top 55%)8879(Top 445%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 18%
×21stories
+97ft-345ft

Overall

5091

Males

4726

M50-54

4726

5K→10K

3.1 - 6.2 mi

Top 19%
×5stories
+79ft-138ft

Overall

5311

Males

4923

M50-54

4923

10K→15K

6.2 - 9.3 mi

Top 18%
×3stories
+67ft-78ft

Overall

5091

Males

4726

M50-54

4726

15K→20K

9.3 - 12.4 mi

Top 20%
×5stories
+106ft-86ft

Overall

5702

Males

5200

M50-54

5200

20K→Half

12.4 - 13.1 mi

Top 19%
×2stories
+19ft-37ft

Overall

5493

Males

5048

M50-54

5048

Half→25K

13.1 - 15.5 mi

Top 20%
×4stories
+66ft-88ft

Overall

5584

Males

5061

M50-54

5061

25K→30K

15.5 - 18.6 mi

Top 26%
×9stories
+181ft-148ft

Overall

7388

Males

6212

M50-54

6212

30K→20M

18.6 - 20.0 mi

Top 41%
×5stories
+64ft-50ft

Overall

11661

Males

8351

M50-54

8351

20M→21M

20.0 - 21.0 mi

Top 74%
×8stories
+106ft-24ft

Overall

20919

Males

12450

M50-54

12450

21M→35K

21.0 - 21.8 mi

Top 63%
×7stories
+17ft-86ft

Overall

17980

Males

11033

M50-54

11033

35K→23M

21.8 - 23.0 mi

Top 57%
×5stories
+23ft-63ft

Overall

16080

Males

10098

M50-54

10098

23M→24M

23.0 - 24.0 mi

Top 49%
×6stories
+12ft-82ft

Overall

13952

Males

9102

M50-54

9102

24M→40K

24.0 - 24.9 mi

Top 27%
×1story
+6ft-20ft

Overall

7686

Males

5824

M50-54

5824

40K→25.2M

24.9 - 25.2 mi

Top 51%
×1story
+13ft-16ft

Overall

14600

Males

9193

M50-54

9193

25.2M→Finish

25.2 - 26.2 mi

Top 48%
×2stories
+22ft-21ft

Overall

13755

Males

8879

M50-54

8879

Passing Analysis

Category:
Athletes Passed
718
Passed By
4178
Net Change
-3460
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#4869
5K → 10K117283-166#4869#5035
10K → 15K140116+24#5035#5011
15K → 20K85209-124#5011#5135
20K → Half2120+1#5135#5134
Half → 25K84156-72#5134#5206
25K → 30K84561-477#5206#5683
30K → 20M12399-387#5683#6070
20M → 21M5894-889#6070#6959
21M → 35K7353-346#6959#7305
35K → 23M25490-465#7305#7770
23M → 24M23289-266#7770#8036
24M → 40K8445+39#8036#7997
40K → 25.2M9120-111#7997#8108
25.2M → Finish22243-221#8108#8329
TOTALS7184178-3460
📊

Passing Visuals

Category:
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🔥Passing Intensity

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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing