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BOSTON MARATHON 2025

Changwoo Lee

Bib: 5870•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 33%
Gender (Male)
#0 / 16105
Top 46%
Masters (Masters Men)
#0 / 10463
Top 35%
Division (M55-59)
#0 / 1648
Top 16%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
19:49
Rank: #2974
Start → 5K
19:49 | 6:23/mi
10K· 6.21 mi
39:38
Rank: #2904 (+70)
5K → 10K
19:49 | 6:23/mi
15K· 9.32 mi
1:01:22
Rank: #4284 (-1380)
10K → 15K
21:44 | 7:00/mi
20K· 12.43 mi
1:24:43
Rank: #6093 (-1809)
15K → 20K
23:21 | 7:31/mi
Half· 13.11 mi
1:29:34
Rank: #6258 (-165)
20K → Half
4:51 | 7:07/mi
25K· 15.53 mi
1:48:54
Rank: #7333 (-1075)
Half → 25K
19:20 | 7:58/mi
30K· 18.64 mi
2:14:39
Rank: #8207 (-874)
25K → 30K
25:45 | 8:17/mi
20M
2:25:18
Rank: #8256 (-49)
30K → 20M
10:39 | 7:50/mi
21M
2:34:15
Rank: #8503 (-247)
20M → 21M
8:57 | 8:57/mi
35K· 21.75 mi
2:41:36
Rank: #9159 (-656)
21M → 35K
7:21 | 9:49/mi
23M
2:51:34
Rank: #9138 (+21)
35K → 23M
9:58 | 7:58/mi
24M
2:59:07
Rank: #9055 (+83)
23M → 24M
7:33 | 7:33/mi
40K· 24.85 mi
3:06:13
Rank: #9177 (-122)
24M → 40K
7:06 | 8:18/mi
25.2M
3:09:18
Rank: #9198 (-21)
40K → 25.2M
3:05 | 8:56/mi
Finish· 26.22 mi
3:17:42
Rank: #9422 (-224)
25.2M → Finish
8:24 | 8:15/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:29:34
Pace6:50 /mi
2nd Half
Distance13.11 mi
Time1:48:08
Pace8:15 /mi
📊Positive Split: 20.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:23:5519:496:2319:49
6:23
-
10K
6.21 mi10:43:4439:386:2319:49
6:23
0:00
15K
9.32 mi11:05:281:01:226:3521:44
7:00
+0:37
20K
12.43 mi11:28:491:24:436:4923:21
7:31
+0:31
Half
13.11 mi11:33:401:29:346:504:51
7:07
-0:24
25K
15.53 mi11:53:001:48:547:0119:20
7:58
+0:51
30K
18.64 mi12:18:452:14:397:1325:45
8:17
+0:19
20M
20.00 mi12:29:242:25:187:1610:39
7:50
-0:27
21M
21.00 mi12:38:212:34:157:218:57
8:57
+1:07
35K
21.75 mi12:45:422:41:367:267:21
9:49
+0:52
23M
23.00 mi12:55:402:51:347:289:58
7:58
-1:51
24M
24.00 mi13:03:132:59:077:287:33
7:33
-0:25
40K
24.85 mi13:10:193:06:137:307:06
8:18
+0:45
25.2M
25.20 mi13:13:243:09:187:313:05
8:56
+0:38
Finish
26.22 mi13:21:483:17:427:338:24
8:15
-0:41

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

6:23 /mi

Average Pace

7:33 /mi

Slowest Pace

9:49 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:06:13

33% of race

Time at Steady Pace

1:52:06

57% of race

Time at Slower Pace

19:23

10% of race

Average Pace: 7:32 /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 mi10:23:5519:496:2319:49
6:23
#2974
10K
6.21 mi10:43:4439:386:2319:49
6:23
#2904
15K
9.32 mi11:05:281:01:226:3521:44
7:00
#4284
20K
12.43 mi11:28:491:24:436:4923:21
7:31
#6093
Half
13.11 mi11:33:401:29:346:504:51
7:07
#6258
25K
15.53 mi11:53:001:48:547:0119:20
7:58
#7333
30K
18.64 mi12:18:452:14:397:1325:45
8:17
#8207
20M
20.00 mi12:29:242:25:187:1610:39
7:50
#8256
21M
21.00 mi12:38:212:34:157:218:57
8:57
#8503
35K
21.75 mi12:45:422:41:367:267:21
9:49
#9159
23M
23.00 mi12:55:402:51:347:289:58
7:58
#9138
24M
24.00 mi13:03:132:59:077:287:33
7:33
#9055
40K
24.85 mi13:10:193:06:137:307:06
8:18
#9177
25.2M
25.20 mi13:13:243:09:187:313:05
8:56
#9198
Finish
26.22 mi13:21:483:17:427:338:24
8:15
#9422
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM55-59Seg. OverallSeg. MalesSeg. M55-59
5K3.11 mi3.11 mi2974283028307607(Top 27%)6689(Top 42%)6689(Top 406%)
10K6.21 mi3.10 mi2904+702767+632767+632914(Top 10%)2775(Top 17%)2775(Top 168%)
15K9.32 mi3.11 mi4284-13804030-12634030-12637607(Top 27%)6689(Top 42%)6689(Top 406%)
20K12.43 mi3.11 mi6093-18095562-15325562-153210874(Top 38%)8435(Top 52%)8435(Top 512%)
Half13.11 mi0.68 mi6258-1655682-1205682-1208343(Top 29%)7112(Top 44%)7112(Top 432%)
25K15.53 mi2.42 mi7333-10756494-8126494-81213657(Top 48%)9576(Top 59%)9576(Top 581%)
30K18.64 mi3.11 mi8207-8746998-5046998-50413404(Top 47%)9308(Top 58%)9308(Top 565%)
20M20.00 mi1.36 mi8256-497004-67004-69259(Top 33%)7135(Top 44%)7135(Top 433%)
21M21.00 mi1.00 mi8503-2477115-1117115-11113172(Top 46%)8928(Top 55%)8928(Top 542%)
35K21.75 mi0.75 mi9159-6567470-3557470-35521367(Top 75%)12600(Top 78%)12600(Top 765%)
23M23.00 mi1.25 mi9138+217412+587412+589718(Top 34%)7086(Top 44%)7086(Top 430%)
24M24.00 mi1.00 mi9055+837338+747338+748046(Top 28%)6141(Top 38%)6141(Top 373%)
40K24.85 mi0.85 mi9177-1227367-297367-2912137(Top 43%)8115(Top 50%)8115(Top 492%)
25.2M25.20 mi0.35 mi9198-217362+57362+511388(Top 40%)7648(Top 47%)7648(Top 464%)
Finish26.22 mi1.02 mi9422-2247445-837445-8314513(Top 51%)9254(Top 57%)9254(Top 562%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 27%
×21stories
+97ft-345ft

Overall

7607

Males

6689

M55-59

6689

5K→10K

3.1 - 6.2 mi

Top 10%
×5stories
+79ft-138ft

Overall

2914

Males

2775

M55-59

2775

10K→15K

6.2 - 9.3 mi

Top 27%
×3stories
+67ft-78ft

Overall

7607

Males

6689

M55-59

6689

15K→20K

9.3 - 12.4 mi

Top 38%
×5stories
+106ft-86ft

Overall

10874

Males

8435

M55-59

8435

20K→Half

12.4 - 13.1 mi

Top 29%
×2stories
+19ft-37ft

Overall

8343

Males

7112

M55-59

7112

Half→25K

13.1 - 15.5 mi

Top 48%
×4stories
+66ft-88ft

Overall

13657

Males

9576

M55-59

9576

25K→30K

15.5 - 18.6 mi

Top 47%
×9stories
+181ft-148ft

Overall

13404

Males

9308

M55-59

9308

30K→20M

18.6 - 20.0 mi

Top 33%
×5stories
+64ft-50ft

Overall

9259

Males

7135

M55-59

7135

20M→21M

20.0 - 21.0 mi

Top 46%
×8stories
+106ft-24ft

Overall

13172

Males

8928

M55-59

8928

21M→35K

21.0 - 21.8 mi

Top 75%
×7stories
+17ft-86ft

Overall

21367

Males

12600

M55-59

12600

35K→23M

21.8 - 23.0 mi

Top 34%
×5stories
+23ft-63ft

Overall

9718

Males

7086

M55-59

7086

23M→24M

23.0 - 24.0 mi

Top 28%
×6stories
+12ft-82ft

Overall

8046

Males

6141

M55-59

6141

24M→40K

24.0 - 24.9 mi

Top 43%
×1story
+6ft-20ft

Overall

12137

Males

8115

M55-59

8115

40K→25.2M

24.9 - 25.2 mi

Top 40%
×1story
+13ft-16ft

Overall

11388

Males

7648

M55-59

7648

25.2M→Finish

25.2 - 26.2 mi

Top 51%
×2stories
+22ft-21ft

Overall

14513

Males

9254

M55-59

9254

Passing Analysis

Category:
Athletes Passed
701
Passed By
7149
Net Change
-6448
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#2974
5K → 10K16797+70#2974#2904
10K → 15K31383-1380#2904#4284
15K → 20K61815-1809#4284#6093
20K → Half3168-165#6093#6258
Half → 25K121087-1075#6258#7333
25K → 30K43917-874#7333#8207
30K → 20M93142-49#8207#8256
20M → 21M34281-247#8256#8503
21M → 35K3659-656#8503#9159
35K → 23M12099+21#9159#9138
23M → 24M11431+83#9138#9055
24M → 40K51173-122#9055#9177
40K → 25.2M3051-21#9177#9198
25.2M → Finish22246-224#9198#9422
TOTALS7017149-6448
📊

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