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BOSTON MARATHON 2025

Seongeun Yu

Bib: 4243•M

CA

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 16%
Gender (Male)
#0 / 16105
Top 26%
Masters (Masters Men)
#0 / 10463
Top 12%
Division (M40-44)
#0 / 2247
Top 31%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:37
Rank: #4910
Start → 5K
20:37 | 6:38/mi
10K· 6.21 mi
41:18
Rank: #4901 (+9)
5K → 10K
20:41 | 6:39/mi
15K· 9.32 mi
1:01:50
Rank: #4660 (+241)
10K → 15K
20:32 | 6:37/mi
20K· 12.43 mi
1:22:48
Rank: #4666 (-6)
15K → 20K
20:58 | 6:45/mi
Half· 13.11 mi
1:27:24
Rank: #4707 (-41)
20K → Half
4:36 | 6:45/mi
25K· 15.53 mi
1:43:53
Rank: #4689 (+18)
Half → 25K
16:29 | 6:48/mi
30K· 18.64 mi
2:06:01
Rank: #4839 (-150)
25K → 30K
22:08 | 7:07/mi
20M
2:15:48
Rank: #4855 (-16)
30K → 20M
9:47 | 7:12/mi
21M
2:23:11
Rank: #4760 (+95)
20M → 21M
7:23 | 7:23/mi
35K· 21.75 mi
2:28:23
Rank: #4736 (+24)
21M → 35K
5:12 | 6:57/mi
23M
2:37:19
Rank: #4707 (+29)
35K → 23M
8:56 | 7:08/mi
24M
2:44:17
Rank: #4681 (+26)
23M → 24M
6:58 | 6:58/mi
40K· 24.85 mi
2:50:21
Rank: #4650 (+31)
24M → 40K
6:04 | 7:06/mi
25.2M
2:52:51
Rank: #4603 (+47)
40K → 25.2M
2:30 | 7:15/mi
Finish· 26.22 mi
2:59:27
Rank: #4511 (+92)
25.2M → Finish
6:36 | 6:29/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:27:24
Pace6:40 /mi
2nd Half
Distance13.11 mi
Time1:32:03
Pace7:01 /mi
📊Positive Split: 5.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:23:2720:376:3820:37
6:38
-
10K
6.21 mi10:44:0841:186:3920:41
6:39
+0:01
15K
9.32 mi11:04:401:01:506:3820:32
6:37
-0:02
20K
12.43 mi11:25:381:22:486:4020:58
6:45
+0:08
Half
13.11 mi11:30:141:27:246:404:36
6:45
0:00
25K
15.53 mi11:46:431:43:536:4116:29
6:48
+0:03
30K
18.64 mi12:08:512:06:016:4622:08
7:07
+0:19
20M
20.00 mi12:18:382:15:486:479:47
7:12
+0:05
21M
21.00 mi12:26:012:23:116:497:23
7:23
+0:11
35K
21.75 mi12:31:132:28:236:495:12
6:57
-0:26
23M
23.00 mi12:40:092:37:196:508:56
7:08
+0:11
24M
24.00 mi12:47:072:44:176:516:58
6:58
-0:10
40K
24.85 mi12:53:112:50:216:516:04
7:06
+0:08
25.2M
25.20 mi12:55:412:52:516:522:30
7:15
+0:09
Finish
26.22 mi13:02:172:59:276:516:36
6:29
-0:46

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

6:29 /mi

Average Pace

6:51 /mi

Slowest Pace

7:23 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:30:51

84% of race

Time at Steady Pace

28:36

16% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:51 /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 mi10:23:2720:376:3820:37
6:38
#4910
10K
6.21 mi10:44:0841:186:3920:41
6:39
#4901
15K
9.32 mi11:04:401:01:506:3820:32
6:37
#4660
20K
12.43 mi11:25:381:22:486:4020:58
6:45
#4666
Half
13.11 mi11:30:141:27:246:404:36
6:45
#4707
25K
15.53 mi11:46:431:43:536:4116:29
6:48
#4689
30K
18.64 mi12:08:512:06:016:4622:08
7:07
#4839
20M
20.00 mi12:18:382:15:486:479:47
7:12
#4855
21M
21.00 mi12:26:012:23:116:497:23
7:23
#4760
35K
21.75 mi12:31:132:28:236:495:12
6:57
#4736
23M
23.00 mi12:40:092:37:196:508:56
7:08
#4707
24M
24.00 mi12:47:072:44:176:516:58
6:58
#4681
40K
24.85 mi12:53:112:50:216:516:04
7:06
#4650
25.2M
25.20 mi12:55:412:52:516:522:30
7:15
#4603
Finish
26.22 mi13:02:172:59:276:516:36
6:29
#4511
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi4910459545954307(Top 15%)4045(Top 25%)4045(Top 180%)
10K6.21 mi3.10 mi4901+94574+214574+214948(Top 17%)4618(Top 29%)4618(Top 206%)
15K9.32 mi3.11 mi4660+2414362+2124362+2124307(Top 15%)4045(Top 25%)4045(Top 180%)
20K12.43 mi3.11 mi4666-64358+44358+44838(Top 17%)4477(Top 28%)4477(Top 199%)
Half13.11 mi0.68 mi4707-414395-374395-375638(Top 20%)5158(Top 32%)5158(Top 230%)
25K15.53 mi2.42 mi4689+184370+254370+254868(Top 17%)4476(Top 28%)4476(Top 199%)
30K18.64 mi3.11 mi4839-1504476-1064476-1065450(Top 19%)4897(Top 30%)4897(Top 218%)
20M20.00 mi1.36 mi4855-164493-174493-175199(Top 18%)4629(Top 29%)4629(Top 206%)
21M21.00 mi1.00 mi4760+954402+914402+914040(Top 14%)3663(Top 23%)3663(Top 163%)
35K21.75 mi0.75 mi4736+244369+334369+335063(Top 18%)4430(Top 28%)4430(Top 197%)
23M23.00 mi1.25 mi4707+294333+364333+364521(Top 16%)3972(Top 25%)3972(Top 177%)
24M24.00 mi1.00 mi4681+264304+294304+294450(Top 16%)3871(Top 24%)3871(Top 172%)
40K24.85 mi0.85 mi4650+314271+334271+334451(Top 16%)3819(Top 24%)3819(Top 170%)
25.2M25.20 mi0.35 mi4603+474227+444227+442385(Top 8%)2138(Top 13%)2138(Top 95%)
Finish26.22 mi1.02 mi4511+924138+894138+892724(Top 10%)2454(Top 15%)2454(Top 109%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 15%
×21stories
+97ft-345ft

Overall

4307

Males

4045

M40-44

4045

5K→10K

3.1 - 6.2 mi

Top 17%
×5stories
+79ft-138ft

Overall

4948

Males

4618

M40-44

4618

10K→15K

6.2 - 9.3 mi

Top 15%
×3stories
+67ft-78ft

Overall

4307

Males

4045

M40-44

4045

15K→20K

9.3 - 12.4 mi

Top 17%
×5stories
+106ft-86ft

Overall

4838

Males

4477

M40-44

4477

20K→Half

12.4 - 13.1 mi

Top 20%
×2stories
+19ft-37ft

Overall

5638

Males

5158

M40-44

5158

Half→25K

13.1 - 15.5 mi

Top 17%
×4stories
+66ft-88ft

Overall

4868

Males

4476

M40-44

4476

25K→30K

15.5 - 18.6 mi

Top 19%
×9stories
+181ft-148ft

Overall

5450

Males

4897

M40-44

4897

30K→20M

18.6 - 20.0 mi

Top 18%
×5stories
+64ft-50ft

Overall

5199

Males

4629

M40-44

4629

20M→21M

20.0 - 21.0 mi

Top 14%
×8stories
+106ft-24ft

Overall

4040

Males

3663

M40-44

3663

21M→35K

21.0 - 21.8 mi

Top 18%
×7stories
+17ft-86ft

Overall

5063

Males

4430

M40-44

4430

35K→23M

21.8 - 23.0 mi

Top 16%
×5stories
+23ft-63ft

Overall

4521

Males

3972

M40-44

3972

23M→24M

23.0 - 24.0 mi

Top 16%
×6stories
+12ft-82ft

Overall

4450

Males

3871

M40-44

3871

24M→40K

24.0 - 24.9 mi

Top 16%
×1story
+6ft-20ft

Overall

4451

Males

3819

M40-44

3819

40K→25.2M

24.9 - 25.2 mi

Top 8%
×1story
+13ft-16ft

Overall

2385

Males

2138

M40-44

2138

25.2M→Finish

25.2 - 26.2 mi

Top 10%
×2stories
+22ft-21ft

Overall

2724

Males

2454

M40-44

2454

Passing Analysis

Category:
Athletes Passed
1438
Passed By
1039
Net Change
+399
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#4910
5K → 10K180171+9#4910#4901
10K → 15K26625+241#4901#4660
15K → 20K122128-6#4660#4666
20K → Half849-41#4666#4707
Half → 25K11092+18#4707#4689
25K → 30K111261-150#4689#4839
30K → 20M7086-16#4839#4855
20M → 21M11520+95#4855#4760
21M → 35K6238+24#4760#4736
35K → 23M10071+29#4736#4707
23M → 24M6943+26#4707#4681
24M → 40K6635+31#4681#4650
40K → 25.2M503+47#4650#4603
25.2M → Finish10917+92#4603#4511
TOTALS14381039+399
📊

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