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BOSTON MARATHON 2025

Seunghyo Lee

Bib: 6616•M

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 22%
Gender (Male)
#0 / 16105
Top 35%
Division (M18-39)
#0 / 5642
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
6:41/mi
20:46
↑ 97↓ 3451.5%
10K· 6.21 mi
7:00/mi
42:30
↑ 79↓ 1380.4%
15K· 9.32 mi
6:41/mi
1:03:17
↑ 67↓ 78
20K· 12.43 mi
6:49/mi
1:24:27
↑ 106↓ 860.1%
Half· 13.11 mi
6:53/mi
1:29:09
↑ 19↓ 370.5%
25K· 15.53 mi
6:49/mi
1:45:41
↑ 66↓ 880.2%
30K· 18.64 mi
7:05/mi
2:07:42
↑ 181↓ 1480.2%
20M
7:18/mi
2:17:37
↑ 64↓ 500.2%
21M
7:36/mi
2:25:13
↑ 106↓ 241.6%
35K· 21.75 mi
7:09/mi
2:30:34
↑ 17↓ 861.7%
23M
7:58/mi
2:40:32
↑ 23↓ 630.6%
24M
7:57/mi
2:48:29
↓ 821.3%
40K· 24.85 mi
8:26/mi
2:55:42
↓ 200.3%
25.2M
9:43/mi
2:59:03
↑ 13↓ 160.2%
Finish· 26.22 mi
8:17/mi
3:07:29
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:29:09
Pace6:48 /mi
2nd Half
Distance13.11 mi
Time1:38:20
Pace7:30 /mi
📊Positive Split: 10.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:26:3120:466:4120:46
6:41
-
10K
6.21 mi10:48:1542:306:5021:44
7:00
+0:19
15K
9.32 mi11:09:021:03:176:4720:47
6:41
-0:19
20K
12.43 mi11:30:121:24:276:4821:10
6:49
+0:08
Half
13.11 mi11:34:541:29:096:484:42
6:53
+0:04
25K
15.53 mi11:51:261:45:416:4816:32
6:49
-0:04
30K
18.64 mi12:13:272:07:426:5122:01
7:05
+0:16
20M
20.00 mi12:23:222:17:376:539:55
7:18
+0:13
21M
21.00 mi12:30:582:25:136:557:36
7:36
+0:18
35K
21.75 mi12:36:192:30:346:555:21
7:09
-0:27
23M
23.00 mi12:46:172:40:326:599:58
7:58
+0:49
24M
24.00 mi12:54:142:48:297:017:57
7:57
-0:01
40K
24.85 mi13:01:272:55:427:047:13
8:26
+0:29
25.2M
25.20 mi13:04:482:59:037:063:21
9:43
+1:17
Finish
26.22 mi13:13:143:07:297:098:26
8:17
-1:26

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

6:41 /mi

Average Pace

7:09 /mi

Slowest Pace

9:43 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

41:33

22% of race

Time at Steady Pace

1:41:25

54% of race

Time at Slower Pace

44:31

24% of race

Average Pace: 7:09 /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 mi10:26:3120:466:4120:46
6:41
#5299
10K
6.21 mi10:48:1542:306:5021:44
7:00
#6658
15K
9.32 mi11:09:021:03:176:4720:47
6:41
#6082
20K
12.43 mi11:30:121:24:276:4821:10
6:49
#5905
Half
13.11 mi11:34:541:29:096:484:42
6:53
#5958
25K
15.53 mi11:51:261:45:416:4816:32
6:49
#5745
30K
18.64 mi12:13:272:07:426:5122:01
7:05
#5594
20M
20.00 mi12:23:222:17:376:539:55
7:18
#5601
21M
21.00 mi12:30:582:25:136:557:36
7:36
#5539
35K
21.75 mi12:36:192:30:346:555:21
7:09
#5554
23M
23.00 mi12:46:172:40:326:599:58
7:58
#5677
24M
24.00 mi12:54:142:48:297:017:57
7:57
#5821
40K
24.85 mi13:01:272:55:427:047:13
8:26
#5997
25.2M
25.20 mi13:04:482:59:037:063:21
9:43
#6105
Finish
26.22 mi13:13:143:07:297:098:26
8:17
#6355
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi5299493049304984(Top 18%)4636(Top 29%)4636(Top 82%)
10K6.21 mi3.10 mi6658-13596030-11006030-11007882(Top 28%)6894(Top 43%)6894(Top 122%)
15K9.32 mi3.11 mi6082+5765570+4605570+4604984(Top 18%)4636(Top 29%)4636(Top 82%)
20K12.43 mi3.11 mi5905+1775409+1615409+1615415(Top 19%)4962(Top 31%)4962(Top 88%)
Half13.11 mi0.68 mi5958-535447-385447-386770(Top 24%)6035(Top 37%)6035(Top 107%)
25K15.53 mi2.42 mi5745+2135263+1845263+1845015(Top 18%)4602(Top 29%)4602(Top 82%)
30K18.64 mi3.11 mi5594+1515116+1475116+1475236(Top 18%)4727(Top 29%)4727(Top 84%)
20M20.00 mi1.36 mi5601-75115+15115+15762(Top 20%)5023(Top 31%)5023(Top 89%)
21M21.00 mi1.00 mi5539+625053+625053+625118(Top 18%)4464(Top 28%)4464(Top 79%)
35K21.75 mi0.75 mi5554-155055-25055-26254(Top 22%)5227(Top 32%)5227(Top 93%)
23M23.00 mi1.25 mi5677-1235130-755130-759699(Top 34%)7067(Top 44%)7067(Top 125%)
24M24.00 mi1.00 mi5821-1445222-925222-9210838(Top 38%)7575(Top 47%)7575(Top 134%)
40K24.85 mi0.85 mi5997-1765345-1235345-12312992(Top 46%)8507(Top 53%)8507(Top 151%)
25.2M25.20 mi0.35 mi6105-1085416-715416-7115572(Top 55%)9638(Top 60%)9638(Top 171%)
Finish26.22 mi1.02 mi6355-2505565-1495565-14914726(Top 52%)9346(Top 58%)9346(Top 166%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 18%
×21story building
+97ft-345ft

Overall

4984

Males

4636

M18-39

4636

5K→10K

3.1 - 6.2 mi

Top 28%
×5story building
+79ft-138ft

Overall

7882

Males

6894

M18-39

6894

10K→15K

6.2 - 9.3 mi

Top 18%
×3story building
+67ft-78ft

Overall

4984

Males

4636

M18-39

4636

15K→20K

9.3 - 12.4 mi

Top 19%
×5story building
+106ft-86ft

Overall

5415

Males

4962

M18-39

4962

20K→Half

12.4 - 13.1 mi

Top 24%
×2story building
+19ft-37ft

Overall

6770

Males

6035

M18-39

6035

Half→25K

13.1 - 15.5 mi

Top 18%
×4story building
+66ft-88ft

Overall

5015

Males

4602

M18-39

4602

25K→30K

15.5 - 18.6 mi

Top 18%
×9story building
+181ft-148ft

Overall

5236

Males

4727

M18-39

4727

30K→20M

18.6 - 20.0 mi

Top 20%
×5story building
+64ft-50ft

Overall

5762

Males

5023

M18-39

5023

20M→21M

20.0 - 21.0 mi

Top 18%
×8story building
+106ft-24ft

Overall

5118

Males

4464

M18-39

4464

21M→35K

21.0 - 21.8 mi

Top 22%
×7story building
+17ft-86ft

Overall

6254

Males

5227

M18-39

5227

35K→23M

21.8 - 23.0 mi

Top 34%
×5story building
+23ft-63ft

Overall

9699

Males

7067

M18-39

7067

23M→24M

23.0 - 24.0 mi

Top 38%
×6story building
+12ft-82ft

Overall

10838

Males

7575

M18-39

7575

24M→40K

24.0 - 24.9 mi

Top 46%
×1story
+6ft-20ft

Overall

12992

Males

8507

M18-39

8507

40K→25.2M

24.9 - 25.2 mi

Top 55%
×1story
+13ft-16ft

Overall

15572

Males

9638

M18-39

9638

25.2M→Finish

25.2 - 26.2 mi

Top 52%
×2story building
+22ft-21ft

Overall

14726

Males

9346

M18-39

9346

Passing Analysis

Category:
Athletes Passed
1640
Passed By
2696
Net Change
-1056
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#5299
5K → 10K131372-1359#5299#6658
10K → 15K5837+576#6658#6082
15K → 20K22750+177#6082#5905
20K → Half1063-53#5905#5958
Half → 25K23118+213#5958#5745
25K → 30K255104+151#5745#5594
30K → 20M6572-7#5594#5601
20M → 21M9937+62#5601#5539
21M → 35K3853-15#5539#5554
35K → 23M45168-123#5554#5677
23M → 24M31175-144#5677#5821
24M → 40K17193-176#5821#5997
40K → 25.2M8116-108#5997#6105
25.2M → Finish18268-250#6105#6355
TOTALS16402696-1056
📊

Passing Visuals

Category:
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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