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BOSTON MARATHON 2025

Ju Suk Kim

Bib: 21412•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
9:31/mi
29:35
↑ 97↓ 3451.5%
10K· 6.21 mi
9:40/mi
59:38
↑ 79↓ 1380.4%
15K· 9.32 mi
10:53/mi
1:33:27
↑ 67↓ 78
20K· 12.43 mi
11:17/mi
2:08:29
↑ 106↓ 860.1%
Half· 13.11 mi
10:19/mi
2:15:31
↑ 19↓ 370.5%
25K· 15.53 mi
11:30/mi
2:43:24
↑ 66↓ 880.2%
30K· 18.64 mi
12:59/mi
3:23:44
↑ 181↓ 1480.2%
20M
11:43/mi
3:39:40
↑ 64↓ 500.2%
21M
13:47/mi
3:53:27
↑ 106↓ 241.6%
35K· 21.75 mi
11:04/mi
4:01:44
↑ 17↓ 861.7%
23M
11:27/mi
4:16:04
↑ 23↓ 630.6%
24M
11:17/mi
4:27:21
↓ 821.3%
40K· 24.85 mi
12:11/mi
4:37:46
↓ 200.3%
25.2M
12:40/mi
4:42:08
↑ 13↓ 160.2%
Finish· 26.22 mi
10:50/mi
4:53:10
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:15:31
Pace10:20 /mi
2nd Half
Distance13.11 mi
Time2:37:39
Pace12:02 /mi
📊Positive Split: 16.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:29:4629:359:3129:35
9:31
-
10K
6.21 mi11:59:4959:389:3630:03
9:40
+0:09
15K
9.32 mi12:33:381:33:2710:0233:49
10:53
+1:13
20K
12.43 mi13:08:402:08:2910:2035:02
11:17
+0:24
Half
13.11 mi13:15:422:15:3110:207:02
10:19
-0:58
25K
15.53 mi13:43:352:43:2410:3127:53
11:30
+1:11
30K
18.64 mi14:23:553:23:4410:5640:20
12:59
+1:29
20M
20.00 mi14:39:513:39:4010:5915:56
11:43
-1:16
21M
21.00 mi14:53:383:53:2711:0713:47
13:47
+2:04
35K
21.75 mi15:01:554:01:4411:078:17
11:04
-2:43
23M
23.00 mi15:16:154:16:0411:0814:20
11:27
+0:23
24M
24.00 mi15:27:324:27:2111:0811:17
11:17
-0:10
40K
24.85 mi15:37:574:37:4611:1110:25
12:11
+0:54
25.2M
25.20 mi15:42:194:42:0811:124:22
12:40
+0:29
Finish
26.22 mi15:53:214:53:1011:1111:02
10:50
-1:50

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

9:31 /mi

Average Pace

11:11 /mi

Slowest Pace

13:47 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:06:40

23% of race

Time at Steady Pace

2:37:36

54% of race

Time at Slower Pace

1:08:54

24% of race

Average Pace: 11:11 /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 mi11:29:4629:359:3129:35
9:31
#24312
10K
6.21 mi11:59:4959:389:3630:03
9:40
#24448
15K
9.32 mi12:33:381:33:2710:0233:49
10:53
#25356
20K
12.43 mi13:08:402:08:2910:2035:02
11:17
#25675
Half
13.11 mi13:15:422:15:3110:207:02
10:19
#25667
25K
15.53 mi13:43:352:43:2410:3127:53
11:30
#25715
30K
18.64 mi14:23:553:23:4410:5640:20
12:59
#25947
20M
20.00 mi14:39:513:39:4010:5915:56
11:43
#25886
21M
21.00 mi14:53:383:53:2711:0713:47
13:47
#25917
35K
21.75 mi15:01:554:01:4411:078:17
11:04
#25870
23M
23.00 mi15:16:154:16:0411:0814:20
11:27
#25800
24M
24.00 mi15:27:324:27:2111:0811:17
11:17
#25762
40K
24.85 mi15:37:574:37:4611:1110:25
12:11
#25750
25.2M
25.20 mi15:42:194:42:0811:124:22
12:40
#25746
Finish
26.22 mi15:53:214:53:1011:1111:02
10:50
#25738
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM60-64Seg. OverallSeg. MalesSeg. M60-64
5K3.11 mi3.11 mi24312143951439526525(Top 93%)15375(Top 95%)15375(Top 1221%)
10K6.21 mi3.10 mi24448-13614464-6914464-6924543(Top 86%)14494(Top 90%)14494(Top 1151%)
15K9.32 mi3.11 mi25356-90814874-41014874-41026525(Top 93%)15375(Top 95%)15375(Top 1221%)
20K12.43 mi3.11 mi25675-31915008-13415008-13426371(Top 93%)15291(Top 95%)15291(Top 1215%)
Half13.11 mi0.68 mi25667+815001+715001+725471(Top 90%)14874(Top 92%)14874(Top 1181%)
25K15.53 mi2.42 mi25715-4815009-815009-825859(Top 91%)15011(Top 93%)15011(Top 1192%)
30K18.64 mi3.11 mi25947-23215082-7315082-7326660(Top 94%)15282(Top 95%)15282(Top 1214%)
20M20.00 mi1.36 mi25886+6115046+3615046+3624885(Top 88%)14411(Top 89%)14411(Top 1145%)
21M21.00 mi1.00 mi25917-3115050-415050-425985(Top 91%)14882(Top 92%)14882(Top 1182%)
35K21.75 mi0.75 mi25870+4715022+2815022+2824369(Top 86%)14055(Top 87%)14055(Top 1116%)
23M23.00 mi1.25 mi25800+7014972+5014972+5024164(Top 85%)13924(Top 86%)13924(Top 1106%)
24M24.00 mi1.00 mi25762+3814938+3414938+3424534(Top 86%)14076(Top 87%)14076(Top 1118%)
40K24.85 mi0.85 mi25750+1214919+1914919+1925216(Top 89%)14382(Top 89%)14382(Top 1142%)
25.2M25.20 mi0.35 mi25746+414914+514914+524502(Top 86%)14021(Top 87%)14021(Top 1114%)
Finish26.22 mi1.02 mi25738+814907+714907+725017(Top 88%)14288(Top 89%)14288(Top 1135%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 93%
×21story building
+97ft-345ft

Overall

26525

Males

15375

M60-64

15375

5K→10K

3.1 - 6.2 mi

Top 86%
×5story building
+79ft-138ft

Overall

24543

Males

14494

M60-64

14494

10K→15K

6.2 - 9.3 mi

Top 93%
×3story building
+67ft-78ft

Overall

26525

Males

15375

M60-64

15375

15K→20K

9.3 - 12.4 mi

Top 93%
×5story building
+106ft-86ft

Overall

26371

Males

15291

M60-64

15291

20K→Half

12.4 - 13.1 mi

Top 90%
×2story building
+19ft-37ft

Overall

25471

Males

14874

M60-64

14874

Half→25K

13.1 - 15.5 mi

Top 91%
×4story building
+66ft-88ft

Overall

25859

Males

15011

M60-64

15011

25K→30K

15.5 - 18.6 mi

Top 94%
×9story building
+181ft-148ft

Overall

26660

Males

15282

M60-64

15282

30K→20M

18.6 - 20.0 mi

Top 88%
×5story building
+64ft-50ft

Overall

24885

Males

14411

M60-64

14411

20M→21M

20.0 - 21.0 mi

Top 91%
×8story building
+106ft-24ft

Overall

25985

Males

14882

M60-64

14882

21M→35K

21.0 - 21.8 mi

Top 86%
×7story building
+17ft-86ft

Overall

24369

Males

14055

M60-64

14055

35K→23M

21.8 - 23.0 mi

Top 85%
×5story building
+23ft-63ft

Overall

24164

Males

13924

M60-64

13924

23M→24M

23.0 - 24.0 mi

Top 86%
×6story building
+12ft-82ft

Overall

24534

Males

14076

M60-64

14076

24M→40K

24.0 - 24.9 mi

Top 89%
×1story
+6ft-20ft

Overall

25216

Males

14382

M60-64

14382

40K→25.2M

24.9 - 25.2 mi

Top 86%
×1story
+13ft-16ft

Overall

24502

Males

14021

M60-64

14021

25.2M→Finish

25.2 - 26.2 mi

Top 88%
×2story building
+22ft-21ft

Overall

25017

Males

14288

M60-64

14288

Passing Analysis

Category:
Athletes Passed
757
Passed By
2183
Net Change
-1426
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#24312
5K → 10K163299-136#24312#24448
10K → 15K13921-908#24448#25356
15K → 20K48367-319#25356#25675
20K → Half2012+8#25675#25667
Half → 25K85133-48#25667#25715
25K → 30K46278-232#25715#25947
30K → 20M8423+61#25947#25886
20M → 21M3263-31#25886#25917
21M → 35K569+47#25917#25870
35K → 23M788+70#25870#25800
23M → 24M5416+38#25800#25762
24M → 40K3624+12#25762#25750
40K → 25.2M128+4#25750#25746
25.2M → Finish3022+8#25746#25738
TOTALS7572183-1426
📊

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