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BOSTON MARATHON 2025

Jae Wook Lee

Bib: 10057•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 45%
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Top 47%
Division (M50-54)
#0 / 1996
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
7:01/mi
21:49
↑ 97↓ 3451.5%
10K· 6.21 mi
7:01/mi
43:36
↑ 79↓ 1380.4%
15K· 9.32 mi
7:05/mi
1:05:35
↑ 67↓ 78
20K· 12.43 mi
7:25/mi
1:28:38
↑ 106↓ 860.1%
Half· 13.11 mi
7:37/mi
1:33:50
↑ 19↓ 370.5%
25K· 15.53 mi
8:00/mi
1:53:15
↑ 66↓ 880.2%
30K· 18.64 mi
8:27/mi
2:19:30
↑ 181↓ 1480.2%
20M
8:17/mi
2:30:46
↑ 64↓ 500.2%
21M
9:49/mi
2:40:35
↑ 106↓ 241.6%
35K· 21.75 mi
9:03/mi
2:47:21
↑ 17↓ 861.7%
23M
10:04/mi
2:59:57
↑ 23↓ 630.6%
24M
8:39/mi
3:08:36
↓ 821.3%
40K· 24.85 mi
9:06/mi
3:16:23
↓ 200.3%
25.2M
10:38/mi
3:20:03
↑ 13↓ 160.2%
Finish· 26.22 mi
8:00/mi
3:28:12
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:33:50
Pace7:09 /mi
2nd Half
Distance13.11 mi
Time1:54:22
Pace8:43 /mi
📊Positive Split: 21.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:47:5721:497:0121:49
7:01
-
10K
6.21 mi11:09:4443:367:0121:47
7:01
0:00
15K
9.32 mi11:31:431:05:357:0221:59
7:05
+0:04
20K
12.43 mi11:54:461:28:387:0823:03
7:25
+0:20
Half
13.11 mi11:59:581:33:507:095:12
7:37
+0:12
25K
15.53 mi12:19:231:53:157:1719:25
8:00
+0:23
30K
18.64 mi12:45:382:19:307:2926:15
8:27
+0:27
20M
20.00 mi12:56:542:30:467:3211:16
8:17
-0:10
21M
21.00 mi13:06:432:40:357:399:49
9:49
+1:32
35K
21.75 mi13:13:292:47:217:426:46
9:03
-0:46
23M
23.00 mi13:26:052:59:577:4912:36
10:04
+1:01
24M
24.00 mi13:34:443:08:367:528:39
8:39
-1:25
40K
24.85 mi13:42:313:16:237:547:47
9:06
+0:27
25.2M
25.20 mi13:46:113:20:037:563:40
10:38
+1:32
Finish
26.22 mi13:54:203:28:127:578:09
8:00
-2:38

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

7:01 /mi

Average Pace

7:57 /mi

Slowest Pace

10:38 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:33:50

45% of race

Time at Steady Pace

1:13:44

35% of race

Time at Slower Pace

40:38

20% of race

Average Pace: 7:56 /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 mi10:47:5721:497:0121:49
7:01
#8000
10K
6.21 mi11:09:4443:367:0121:47
7:01
#7982
15K
9.32 mi11:31:431:05:357:0221:59
7:05
#8016
20K
12.43 mi11:54:461:28:387:0823:03
7:25
#8394
Half
13.11 mi11:59:581:33:507:095:12
7:37
#8611
25K
15.53 mi12:19:231:53:157:1719:25
8:00
#9486
30K
18.64 mi12:45:382:19:307:2926:15
8:27
#10432
20M
20.00 mi12:56:542:30:467:3211:16
8:17
#10588
21M
21.00 mi13:06:432:40:357:399:49
9:49
#11047
35K
21.75 mi13:13:292:47:217:426:46
9:03
#11350
23M
23.00 mi13:26:052:59:577:4912:36
10:04
#12149
24M
24.00 mi13:34:443:08:367:528:39
8:39
#12312
40K
24.85 mi13:42:313:16:237:547:47
9:06
#12482
25.2M
25.20 mi13:46:113:20:037:563:40
10:38
#12658
Finish
26.22 mi13:54:203:28:127:578:09
8:00
#12652
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi8000700270028167(Top 29%)7048(Top 44%)7048(Top 353%)
10K6.21 mi3.10 mi7982+186976+266976+267998(Top 28%)6972(Top 43%)6972(Top 349%)
15K9.32 mi3.11 mi8016-346990-146990-148167(Top 29%)7048(Top 44%)7048(Top 353%)
20K12.43 mi3.11 mi8394-3787192-2027192-20210056(Top 35%)8046(Top 50%)8046(Top 403%)
Half13.11 mi0.68 mi8611-2177320-1287320-12812711(Top 45%)9334(Top 58%)9334(Top 468%)
25K15.53 mi2.42 mi9486-8757785-4657785-46513939(Top 49%)9721(Top 60%)9721(Top 487%)
30K18.64 mi3.11 mi10432-9468236-4518236-45114433(Top 51%)9795(Top 61%)9795(Top 491%)
20M20.00 mi1.36 mi10588-1568262-268262-2612415(Top 44%)8734(Top 54%)8734(Top 438%)
21M21.00 mi1.00 mi11047-4598453-1918453-19117519(Top 62%)10923(Top 68%)10923(Top 547%)
35K21.75 mi0.75 mi11350-3038565-1128565-11218412(Top 65%)11216(Top 70%)11216(Top 562%)
23M23.00 mi1.25 mi12149-7998908-3438908-34320673(Top 73%)12226(Top 76%)12226(Top 613%)
24M24.00 mi1.00 mi12312-1638951-438951-4315416(Top 54%)9767(Top 61%)9767(Top 489%)
40K24.85 mi0.85 mi12482-1709002-519002-5116847(Top 59%)10293(Top 64%)10293(Top 516%)
25.2M25.20 mi0.35 mi12658-1769075-739075-7319409(Top 68%)11483(Top 71%)11483(Top 575%)
Finish26.22 mi1.02 mi12652+69039+369039+3612844(Top 45%)8457(Top 53%)8457(Top 424%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 29%
×21story building
+97ft-345ft

Overall

8167

Males

7048

M50-54

7048

5K→10K

3.1 - 6.2 mi

Top 28%
×5story building
+79ft-138ft

Overall

7998

Males

6972

M50-54

6972

10K→15K

6.2 - 9.3 mi

Top 29%
×3story building
+67ft-78ft

Overall

8167

Males

7048

M50-54

7048

15K→20K

9.3 - 12.4 mi

Top 35%
×5story building
+106ft-86ft

Overall

10056

Males

8046

M50-54

8046

20K→Half

12.4 - 13.1 mi

Top 45%
×2story building
+19ft-37ft

Overall

12711

Males

9334

M50-54

9334

Half→25K

13.1 - 15.5 mi

Top 49%
×4story building
+66ft-88ft

Overall

13939

Males

9721

M50-54

9721

25K→30K

15.5 - 18.6 mi

Top 51%
×9story building
+181ft-148ft

Overall

14433

Males

9795

M50-54

9795

30K→20M

18.6 - 20.0 mi

Top 44%
×5story building
+64ft-50ft

Overall

12415

Males

8734

M50-54

8734

20M→21M

20.0 - 21.0 mi

Top 62%
×8story building
+106ft-24ft

Overall

17519

Males

10923

M50-54

10923

21M→35K

21.0 - 21.8 mi

Top 65%
×7story building
+17ft-86ft

Overall

18412

Males

11216

M50-54

11216

35K→23M

21.8 - 23.0 mi

Top 73%
×5story building
+23ft-63ft

Overall

20673

Males

12226

M50-54

12226

23M→24M

23.0 - 24.0 mi

Top 54%
×6story building
+12ft-82ft

Overall

15416

Males

9767

M50-54

9767

24M→40K

24.0 - 24.9 mi

Top 59%
×1story
+6ft-20ft

Overall

16847

Males

10293

M50-54

10293

40K→25.2M

24.9 - 25.2 mi

Top 68%
×1story
+13ft-16ft

Overall

19409

Males

11483

M50-54

11483

25.2M→Finish

25.2 - 26.2 mi

Top 45%
×2story building
+22ft-21ft

Overall

12844

Males

8457

M50-54

8457

Passing Analysis

Category:
Athletes Passed
813
Passed By
5463
Net Change
-4652
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#8000
5K → 10K224206+18#8000#7982
10K → 15K133167-34#7982#8016
15K → 20K71449-378#8016#8394
20K → Half4221-217#8394#8611
Half → 25K30905-875#8611#9486
25K → 30K571001-946#9486#10432
30K → 20M82238-156#10432#10588
20M → 21M23482-459#10588#11047
21M → 35K10313-303#11047#11350
35K → 23M18817-799#11350#12149
23M → 24M39202-163#12149#12312
24M → 40K34204-170#12312#12482
40K → 25.2M8184-176#12482#12658
25.2M → Finish8074+6#12658#12652
TOTALS8135463-4652
📊

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