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BOSTON MARATHON 2025

Jong Hwan Chae

Bib: 19111•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M60-64)
#0 / 1259
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
8:38/mi
26:48
↑ 97↓ 3451.5%
10K· 6.21 mi
8:42/mi
53:49
↑ 79↓ 1380.4%
15K· 9.32 mi
8:43/mi
1:20:53
↑ 67↓ 78
20K· 12.43 mi
8:47/mi
1:48:10
↑ 106↓ 860.1%
Half· 13.11 mi
8:36/mi
1:54:02
↑ 19↓ 370.5%
25K· 15.53 mi
9:37/mi
2:17:20
↑ 66↓ 880.2%
30K· 18.64 mi
10:22/mi
2:49:31
↑ 181↓ 1480.2%
20M
11:49/mi
3:05:35
↑ 64↓ 500.2%
21M
12:40/mi
3:18:15
↑ 106↓ 241.6%
35K· 21.75 mi
10:24/mi
3:26:02
↑ 17↓ 861.7%
23M
10:28/mi
3:39:08
↑ 23↓ 630.6%
24M
10:28/mi
3:49:36
↓ 821.3%
40K· 24.85 mi
10:48/mi
3:58:50
↓ 200.3%
25.2M
12:05/mi
4:03:00
↑ 13↓ 160.2%
Finish· 26.22 mi
9:49/mi
4:13:00
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:54:02
Pace8:42 /mi
2nd Half
Distance13.11 mi
Time2:18:58
Pace10:36 /mi
📊Positive Split: 21.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:17:3926:488:3826:48
8:38
-
10K
6.21 mi11:44:4053:498:4027:01
8:42
+0:04
15K
9.32 mi12:11:441:20:538:4127:04
8:43
+0:01
20K
12.43 mi12:39:011:48:108:4227:17
8:47
+0:04
Half
13.11 mi12:44:531:54:028:425:52
8:36
-0:11
25K
15.53 mi13:08:112:17:208:5023:18
9:37
+1:01
30K
18.64 mi13:40:222:49:319:0632:11
10:22
+0:45
20M
20.00 mi13:56:263:05:359:1716:04
11:49
+1:27
21M
21.00 mi14:09:063:18:159:2612:40
12:40
+0:51
35K
21.75 mi14:16:533:26:029:287:47
10:24
-2:16
23M
23.00 mi14:29:593:39:089:3213:06
10:28
+0:04
24M
24.00 mi14:40:273:49:369:3410:28
10:28
0:00
40K
24.85 mi14:49:413:58:509:379:14
10:48
+0:20
25.2M
25.20 mi14:53:514:03:009:394:10
12:05
+1:17
Finish
26.22 mi15:03:514:13:009:3910:00
9:49
-2:16

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

8:36 /mi

Average Pace

9:39 /mi

Slowest Pace

12:40 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:17:20

54% of race

Time at Steady Pace

1:22:46

33% of race

Time at Slower Pace

32:54

13% of race

Average Pace: 9:39 /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 mi11:17:3926:488:3826:48
8:38
#20606
10K
6.21 mi11:44:4053:498:4027:01
8:42
#20705
15K
9.32 mi12:11:441:20:538:4127:04
8:43
#20627
20K
12.43 mi12:39:011:48:108:4227:17
8:47
#20447
Half
13.11 mi12:44:531:54:028:425:52
8:36
#20400
25K
15.53 mi13:08:112:17:208:5023:18
9:37
#20822
30K
18.64 mi13:40:222:49:319:0632:11
10:22
#21301
20M
20.00 mi13:56:263:05:359:1716:04
11:49
#21792
21M
21.00 mi14:09:063:18:159:2612:40
12:40
#22051
35K
21.75 mi14:16:533:26:029:287:47
10:24
#22082
23M
23.00 mi14:29:593:39:089:3213:06
10:28
#22054
24M
24.00 mi14:40:273:49:369:3410:28
10:28
#22085
40K
24.85 mi14:49:413:58:509:379:14
10:48
#22108
25.2M
25.20 mi14:53:514:03:009:394:10
12:05
#22137
Finish
26.22 mi15:03:514:13:009:3910:00
9:49
#22118
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM60-64Seg. OverallSeg. MalesSeg. M60-64
5K3.11 mi3.11 mi20606126891268920554(Top 72%)12756(Top 79%)12756(Top 1013%)
10K6.21 mi3.10 mi20705-9912757-6812757-6820841(Top 73%)12848(Top 80%)12848(Top 1020%)
15K9.32 mi3.11 mi20627+7812747+1012747+1020554(Top 72%)12756(Top 79%)12756(Top 1013%)
20K12.43 mi3.11 mi20447+18012661+8612661+8619843(Top 70%)12392(Top 77%)12392(Top 984%)
Half13.11 mi0.68 mi20400+4712640+2112640+2119806(Top 70%)12399(Top 77%)12399(Top 985%)
25K15.53 mi2.42 mi20822-42212825-18512825-18522213(Top 78%)13388(Top 83%)13388(Top 1063%)
30K18.64 mi3.11 mi21301-47912991-16612991-16622607(Top 80%)13436(Top 83%)13436(Top 1067%)
20M20.00 mi1.36 mi21792-49113209-21813209-21825010(Top 88%)14470(Top 90%)14470(Top 1149%)
21M21.00 mi1.00 mi22051-25913299-9013299-9024614(Top 87%)14193(Top 88%)14193(Top 1127%)
35K21.75 mi0.75 mi22082-3113302-313302-322946(Top 81%)13357(Top 83%)13357(Top 1061%)
23M23.00 mi1.25 mi22054+2813246+5613246+5621919(Top 77%)12840(Top 80%)12840(Top 1020%)
24M24.00 mi1.00 mi22085-3113244+213244+222711(Top 80%)13164(Top 82%)13164(Top 1046%)
40K24.85 mi0.85 mi22108-2313231+1313231+1322669(Top 80%)13075(Top 81%)13075(Top 1039%)
25.2M25.20 mi0.35 mi22137-2913237-613237-623380(Top 82%)13460(Top 84%)13460(Top 1069%)
Finish26.22 mi1.02 mi22118+1913214+2313214+2322317(Top 79%)12929(Top 80%)12929(Top 1027%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 72%
×21story building
+97ft-345ft

Overall

20554

Males

12756

M60-64

12756

5K→10K

3.1 - 6.2 mi

Top 73%
×5story building
+79ft-138ft

Overall

20841

Males

12848

M60-64

12848

10K→15K

6.2 - 9.3 mi

Top 72%
×3story building
+67ft-78ft

Overall

20554

Males

12756

M60-64

12756

15K→20K

9.3 - 12.4 mi

Top 70%
×5story building
+106ft-86ft

Overall

19843

Males

12392

M60-64

12392

20K→Half

12.4 - 13.1 mi

Top 70%
×2story building
+19ft-37ft

Overall

19806

Males

12399

M60-64

12399

Half→25K

13.1 - 15.5 mi

Top 78%
×4story building
+66ft-88ft

Overall

22213

Males

13388

M60-64

13388

25K→30K

15.5 - 18.6 mi

Top 80%
×9story building
+181ft-148ft

Overall

22607

Males

13436

M60-64

13436

30K→20M

18.6 - 20.0 mi

Top 88%
×5story building
+64ft-50ft

Overall

25010

Males

14470

M60-64

14470

20M→21M

20.0 - 21.0 mi

Top 87%
×8story building
+106ft-24ft

Overall

24614

Males

14193

M60-64

14193

21M→35K

21.0 - 21.8 mi

Top 81%
×7story building
+17ft-86ft

Overall

22946

Males

13357

M60-64

13357

35K→23M

21.8 - 23.0 mi

Top 77%
×5story building
+23ft-63ft

Overall

21919

Males

12840

M60-64

12840

23M→24M

23.0 - 24.0 mi

Top 80%
×6story building
+12ft-82ft

Overall

22711

Males

13164

M60-64

13164

24M→40K

24.0 - 24.9 mi

Top 80%
×1story
+6ft-20ft

Overall

22669

Males

13075

M60-64

13075

40K→25.2M

24.9 - 25.2 mi

Top 82%
×1story
+13ft-16ft

Overall

23380

Males

13460

M60-64

13460

25.2M→Finish

25.2 - 26.2 mi

Top 79%
×2story building
+22ft-21ft

Overall

22317

Males

12929

M60-64

12929

Passing Analysis

Category:
Athletes Passed
1266
Passed By
2778
Net Change
-1512
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#20606
5K → 10K229328-99#20606#20705
10K → 15K234156+78#20705#20627
15K → 20K27696+180#20627#20447
20K → Half5811+47#20447#20400
Half → 25K58480-422#20400#20822
25K → 30K89568-479#20822#21301
30K → 20M17508-491#21301#21792
20M → 21M26285-259#21792#22051
21M → 35K3364-31#22051#22082
35K → 23M9466+28#22082#22054
23M → 24M4071-31#22054#22085
24M → 40K3760-23#22085#22108
40K → 25.2M1443-29#22108#22137
25.2M → Finish6142+19#22137#22118
TOTALS12662778-1512
📊

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