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BOSTON MARATHON 2025

Kichang Lee

Bib: 4358•M

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 17%
Gender (Male)
#0 / 16105
Top 27%
Division (M18-39)
#0 / 5642
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:47
Rank: #5340
Start → 5K
20:47 | 6:41/mi
10K· 6.21 mi
41:41
Rank: #5447 (-107)
5K → 10K
20:54 | 6:44/mi
15K· 9.32 mi
1:02:31
Rank: #5311 (+136)
10K → 15K
20:50 | 6:42/mi
20K· 12.43 mi
1:23:25
Rank: #5104 (+207)
15K → 20K
20:54 | 6:44/mi
Half· 13.11 mi
1:27:50
Rank: #4997 (+107)
20K → Half
4:25 | 6:28/mi
25K· 15.53 mi
1:44:35
Rank: #5087 (-90)
Half → 25K
16:45 | 6:55/mi
30K· 18.64 mi
2:06:42
Rank: #5121 (-34)
25K → 30K
22:07 | 7:07/mi
20M
2:16:20
Rank: #5070 (+51)
30K → 20M
9:38 | 7:05/mi
21M
2:24:01
Rank: #5075 (-5)
20M → 21M
7:41 | 7:41/mi
35K· 21.75 mi
2:29:02
Rank: #4991 (+84)
21M → 35K
5:01 | 6:42/mi
23M
2:37:47
Rank: #4875 (+116)
35K → 23M
8:45 | 6:59/mi
24M
2:44:37
Rank: #4794 (+81)
23M → 24M
6:50 | 6:50/mi
40K· 24.85 mi
2:50:43
Rank: #4771 (+23)
24M → 40K
6:06 | 7:08/mi
25.2M
2:53:24
Rank: #4768 (+3)
40K → 25.2M
2:41 | 7:47/mi
Finish· 26.22 mi
3:00:41
Rank: #4846 (-78)
25.2M → Finish
7:17 | 7:09/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:27:50
Pace6:42 /mi
2nd Half
Distance13.11 mi
Time1:32:51
Pace7:05 /mi
📊Positive Split: 5.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:46:3420:476:4120:47
6:41
-
10K
6.21 mi11:07:2841:416:4220:54
6:44
+0:03
15K
9.32 mi11:28:181:02:316:4220:50
6:42
-0:02
20K
12.43 mi11:49:121:23:256:4320:54
6:44
+0:02
Half
13.11 mi11:53:371:27:506:424:25
6:28
-0:16
25K
15.53 mi12:10:221:44:356:4416:45
6:55
+0:27
30K
18.64 mi12:32:292:06:426:4822:07
7:07
+0:12
20M
20.00 mi12:42:072:16:206:499:38
7:05
-0:02
21M
21.00 mi12:49:482:24:016:517:41
7:41
+0:36
35K
21.75 mi12:54:492:29:026:515:01
6:42
-0:59
23M
23.00 mi13:03:342:37:476:528:45
6:59
+0:17
24M
24.00 mi13:10:242:44:376:526:50
6:50
-0:09
40K
24.85 mi13:16:302:50:436:526:06
7:08
+0:18
25.2M
25.20 mi13:19:112:53:246:532:41
7:47
+0:39
Finish
26.22 mi13:26:283:00:416:547:17
7:09
-0:38

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

6:28 /mi

Average Pace

6:54 /mi

Slowest Pace

7:47 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:32:51

51% of race

Time at Steady Pace

41:58

23% of race

Time at Slower Pace

45:52

25% of race

Average Pace: 6:53 /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 mi10:46:3420:476:4120:47
6:41
#5340
10K
6.21 mi11:07:2841:416:4220:54
6:44
#5447
15K
9.32 mi11:28:181:02:316:4220:50
6:42
#5311
20K
12.43 mi11:49:121:23:256:4320:54
6:44
#5104
Half
13.11 mi11:53:371:27:506:424:25
6:28
#4997
25K
15.53 mi12:10:221:44:356:4416:45
6:55
#5087
30K
18.64 mi12:32:292:06:426:4822:07
7:07
#5121
20M
20.00 mi12:42:072:16:206:499:38
7:05
#5070
21M
21.00 mi12:49:482:24:016:517:41
7:41
#5075
35K
21.75 mi12:54:492:29:026:515:01
6:42
#4991
23M
23.00 mi13:03:342:37:476:528:45
6:59
#4875
24M
24.00 mi13:10:242:44:376:526:50
6:50
#4794
40K
24.85 mi13:16:302:50:436:526:06
7:08
#4771
25.2M
25.20 mi13:19:112:53:246:532:41
7:47
#4768
Finish
26.22 mi13:26:283:00:416:547:17
7:09
#4846
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi5340496449645116(Top 18%)4741(Top 29%)4741(Top 84%)
10K6.21 mi3.10 mi5447-1075041-775041-775578(Top 20%)5127(Top 32%)5127(Top 91%)
15K9.32 mi3.11 mi5311+1364926+1154926+1155116(Top 18%)4741(Top 29%)4741(Top 84%)
20K12.43 mi3.11 mi5104+2074739+1874739+1874663(Top 16%)4325(Top 27%)4325(Top 77%)
Half13.11 mi0.68 mi4997+1074647+924647+923506(Top 12%)3322(Top 21%)3322(Top 59%)
25K15.53 mi2.42 mi5087-904717-704717-705710(Top 20%)5163(Top 32%)5163(Top 92%)
30K18.64 mi3.11 mi5121-344713+44713+45410(Top 19%)4861(Top 30%)4861(Top 86%)
20M20.00 mi1.36 mi5070+514668+454668+454601(Top 16%)4171(Top 26%)4171(Top 74%)
21M21.00 mi1.00 mi5075-54663+54663+55536(Top 19%)4746(Top 29%)4746(Top 84%)
35K21.75 mi0.75 mi4991+844584+794584+793525(Top 12%)3198(Top 20%)3198(Top 57%)
23M23.00 mi1.25 mi4875+1164479+1054479+1053685(Top 13%)3329(Top 21%)3329(Top 59%)
24M24.00 mi1.00 mi4794+814399+804399+803697(Top 13%)3293(Top 20%)3293(Top 58%)
40K24.85 mi0.85 mi4771+234374+254374+254644(Top 16%)3949(Top 25%)3949(Top 70%)
25.2M25.20 mi0.35 mi4768+34366+84366+84708(Top 17%)3906(Top 24%)3906(Top 69%)
Finish26.22 mi1.02 mi4846-784424-584424-586652(Top 23%)5112(Top 32%)5112(Top 91%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 18%
×21stories
+97ft-345ft

Overall

5116

Males

4741

M18-39

4741

5K→10K

3.1 - 6.2 mi

Top 20%
×5stories
+79ft-138ft

Overall

5578

Males

5127

M18-39

5127

10K→15K

6.2 - 9.3 mi

Top 18%
×3stories
+67ft-78ft

Overall

5116

Males

4741

M18-39

4741

15K→20K

9.3 - 12.4 mi

Top 16%
×5stories
+106ft-86ft

Overall

4663

Males

4325

M18-39

4325

20K→Half

12.4 - 13.1 mi

Top 12%
×2stories
+19ft-37ft

Overall

3506

Males

3322

M18-39

3322

Half→25K

13.1 - 15.5 mi

Top 20%
×4stories
+66ft-88ft

Overall

5710

Males

5163

M18-39

5163

25K→30K

15.5 - 18.6 mi

Top 19%
×9stories
+181ft-148ft

Overall

5410

Males

4861

M18-39

4861

30K→20M

18.6 - 20.0 mi

Top 16%
×5stories
+64ft-50ft

Overall

4601

Males

4171

M18-39

4171

20M→21M

20.0 - 21.0 mi

Top 19%
×8stories
+106ft-24ft

Overall

5536

Males

4746

M18-39

4746

21M→35K

21.0 - 21.8 mi

Top 12%
×7stories
+17ft-86ft

Overall

3525

Males

3198

M18-39

3198

35K→23M

21.8 - 23.0 mi

Top 13%
×5stories
+23ft-63ft

Overall

3685

Males

3329

M18-39

3329

23M→24M

23.0 - 24.0 mi

Top 13%
×6stories
+12ft-82ft

Overall

3697

Males

3293

M18-39

3293

24M→40K

24.0 - 24.9 mi

Top 16%
×1story
+6ft-20ft

Overall

4644

Males

3949

M18-39

3949

40K→25.2M

24.9 - 25.2 mi

Top 17%
×1story
+13ft-16ft

Overall

4708

Males

3906

M18-39

3906

25.2M→Finish

25.2 - 26.2 mi

Top 23%
×2stories
+22ft-21ft

Overall

6652

Males

5112

M18-39

5112

Passing Analysis

Category:
Athletes Passed
1541
Passed By
1047
Net Change
+494
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#5340
5K → 10K133240-107#5340#5447
10K → 15K19256+136#5447#5311
15K → 20K24437+207#5311#5104
20K → Half1081+107#5104#4997
Half → 25K75165-90#4997#5087
25K → 30K158192-34#5087#5121
30K → 20M9443+51#5121#5070
20M → 21M7580-5#5070#5075
21M → 35K9713+84#5075#4991
35K → 23M14024+116#4991#4875
23M → 24M10120+81#4875#4794
24M → 40K7350+23#4794#4771
40K → 25.2M2623+3#4771#4768
25.2M → Finish25103-78#4768#4846
TOTALS15411047+494
📊

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