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BOSTON MARATHON 2025

Sung-Nam Kim

Bib: 23804•M

TN

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M65-69)
#0 / 639
Top 38%
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
8:51/mi
27:31
↑ 97↓ 3451.5%
10K· 6.21 mi
8:54/mi
55:09
↑ 79↓ 1380.4%
15K· 9.32 mi
8:55/mi
1:22:51
↑ 67↓ 78
20K· 12.43 mi
9:02/mi
1:50:54
↑ 106↓ 860.1%
Half· 13.11 mi
8:51/mi
1:56:56
↑ 19↓ 370.5%
25K· 15.53 mi
8:55/mi
2:18:34
↑ 66↓ 880.2%
30K· 18.64 mi
9:04/mi
2:46:44
↑ 181↓ 1480.2%
20M
9:30/mi
2:59:38
↑ 64↓ 500.2%
21M
10:04/mi
3:09:42
↑ 106↓ 241.6%
35K· 21.75 mi
9:56/mi
3:17:08
↑ 17↓ 861.7%
23M
10:06/mi
3:29:47
↑ 23↓ 630.6%
24M
8:25/mi
3:38:12
↓ 821.3%
40K· 24.85 mi
8:44/mi
3:45:40
↓ 200.3%
25.2M
9:28/mi
3:48:56
↑ 13↓ 160.2%
Finish· 26.22 mi
8:40/mi
3:57:46
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:56:56
Pace8:55 /mi
2nd Half
Distance13.11 mi
Time2:00:50
Pace9:13 /mi
📊Positive Split: 3.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:27:2127:318:5127:31
8:51
-
10K
6.21 mi11:54:5955:098:5327:38
8:54
+0:03
15K
9.32 mi12:22:411:22:518:5327:42
8:55
+0:01
20K
12.43 mi12:50:441:50:548:5528:03
9:02
+0:07
Half
13.11 mi12:56:461:56:568:556:02
8:51
-0:11
25K
15.53 mi13:18:242:18:348:5521:38
8:55
+0:04
30K
18.64 mi13:46:342:46:448:5728:10
9:04
+0:09
20M
20.00 mi13:59:282:59:388:5912:54
9:30
+0:26
21M
21.00 mi14:09:323:09:429:0210:04
10:04
+0:34
35K
21.75 mi14:16:583:17:089:047:26
9:56
-0:08
23M
23.00 mi14:29:373:29:479:0712:39
10:06
+0:10
24M
24.00 mi14:38:023:38:129:068:25
8:25
-1:41
40K
24.85 mi14:45:303:45:409:057:28
8:44
+0:19
25.2M
25.20 mi14:48:463:48:569:053:16
9:28
+0:44
Finish
26.22 mi14:57:363:57:469:058:50
8:40
-0:48

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

8:25 /mi

Average Pace

9:05 /mi

Slowest Pace

10:06 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

8:25

4% of race

Time at Steady Pace

3:03:02

77% of race

Time at Slower Pace

46:19

19% of race

Average Pace: 9:04 /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 mi11:27:2127:318:5127:31
8:51
#21784
10K
6.21 mi11:54:5955:098:5327:38
8:54
#21836
15K
9.32 mi12:22:411:22:518:5327:42
8:55
#21759
20K
12.43 mi12:50:441:50:548:5528:03
9:02
#21567
Half
13.11 mi12:56:461:56:568:556:02
8:51
#21543
25K
15.53 mi13:18:242:18:348:5521:38
8:55
#21204
30K
18.64 mi13:46:342:46:448:5728:10
9:04
#20591
20M
20.00 mi13:59:282:59:388:5912:54
9:30
#20472
21M
21.00 mi14:09:323:09:429:0210:04
10:04
#20351
35K
21.75 mi14:16:583:17:089:047:26
9:56
#20422
23M
23.00 mi14:29:373:29:479:0712:39
10:06
#20467
24M
24.00 mi14:38:023:38:129:068:25
8:25
#20248
40K
24.85 mi14:45:303:45:409:057:28
8:44
#20058
25.2M
25.20 mi14:48:463:48:569:053:16
9:28
#19979
Finish
26.22 mi14:57:363:57:469:058:50
8:40
#19891
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM65-69Seg. OverallSeg. MalesSeg. M65-69
5K3.11 mi3.11 mi21784132151321521631(Top 76%)13225(Top 82%)13225(Top 2070%)
10K6.21 mi3.10 mi21836-5213259-4413259-4421882(Top 77%)13286(Top 82%)13286(Top 2079%)
15K9.32 mi3.11 mi21759+7713225+3413225+3421631(Top 76%)13225(Top 82%)13225(Top 2070%)
20K12.43 mi3.11 mi21567+19213151+7413151+7421112(Top 74%)12934(Top 80%)12934(Top 2024%)
Half13.11 mi0.68 mi21543+2413140+1113140+1121072(Top 74%)12922(Top 80%)12922(Top 2022%)
25K15.53 mi2.42 mi21204+33912989+15112989+15119519(Top 69%)12194(Top 76%)12194(Top 1908%)
30K18.64 mi3.11 mi20591+61312672+31712672+31718007(Top 63%)11387(Top 71%)11387(Top 1782%)
20M20.00 mi1.36 mi20472+11912596+7612596+7619133(Top 67%)11750(Top 73%)11750(Top 1839%)
21M21.00 mi1.00 mi20351+12112523+7312523+7318553(Top 65%)11416(Top 71%)11416(Top 1787%)
35K21.75 mi0.75 mi20422-7112543-2012543-2021701(Top 76%)12765(Top 79%)12765(Top 1998%)
23M23.00 mi1.25 mi20467-45125431254320812(Top 73%)12301(Top 76%)12301(Top 1925%)
24M24.00 mi1.00 mi20248+21912412+13112412+13113993(Top 49%)9143(Top 57%)9143(Top 1431%)
40K24.85 mi0.85 mi20058+19012313+9912313+9914807(Top 52%)9362(Top 58%)9362(Top 1465%)
25.2M25.20 mi0.35 mi19979+7912270+4312270+4314434(Top 51%)9163(Top 57%)9163(Top 1434%)
Finish26.22 mi1.02 mi19891+8812211+5912211+5917271(Top 61%)10539(Top 65%)10539(Top 1649%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 76%
×21story building
+97ft-345ft

Overall

21631

Males

13225

M65-69

13225

5K→10K

3.1 - 6.2 mi

Top 77%
×5story building
+79ft-138ft

Overall

21882

Males

13286

M65-69

13286

10K→15K

6.2 - 9.3 mi

Top 76%
×3story building
+67ft-78ft

Overall

21631

Males

13225

M65-69

13225

15K→20K

9.3 - 12.4 mi

Top 74%
×5story building
+106ft-86ft

Overall

21112

Males

12934

M65-69

12934

20K→Half

12.4 - 13.1 mi

Top 74%
×2story building
+19ft-37ft

Overall

21072

Males

12922

M65-69

12922

Half→25K

13.1 - 15.5 mi

Top 69%
×4story building
+66ft-88ft

Overall

19519

Males

12194

M65-69

12194

25K→30K

15.5 - 18.6 mi

Top 63%
×9story building
+181ft-148ft

Overall

18007

Males

11387

M65-69

11387

30K→20M

18.6 - 20.0 mi

Top 67%
×5story building
+64ft-50ft

Overall

19133

Males

11750

M65-69

11750

20M→21M

20.0 - 21.0 mi

Top 65%
×8story building
+106ft-24ft

Overall

18553

Males

11416

M65-69

11416

21M→35K

21.0 - 21.8 mi

Top 76%
×7story building
+17ft-86ft

Overall

21701

Males

12765

M65-69

12765

35K→23M

21.8 - 23.0 mi

Top 73%
×5story building
+23ft-63ft

Overall

20812

Males

12301

M65-69

12301

23M→24M

23.0 - 24.0 mi

Top 49%
×6story building
+12ft-82ft

Overall

13993

Males

9143

M65-69

9143

24M→40K

24.0 - 24.9 mi

Top 52%
×1story
+6ft-20ft

Overall

14807

Males

9362

M65-69

9362

40K→25.2M

24.9 - 25.2 mi

Top 51%
×1story
+13ft-16ft

Overall

14434

Males

9163

M65-69

9163

25.2M→Finish

25.2 - 26.2 mi

Top 61%
×2story building
+22ft-21ft

Overall

17271

Males

10539

M65-69

10539

Passing Analysis

Category:
Athletes Passed
2818
Passed By
925
Net Change
+1893
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#21784
5K → 10K240292-52#21784#21836
10K → 15K239162+77#21836#21759
15K → 20K28391+192#21759#21567
20K → Half4319+24#21567#21543
Half → 25K36021+339#21543#21204
25K → 30K6174+613#21204#20591
30K → 20M15940+119#20591#20472
20M → 21M15332+121#20472#20351
21M → 35K40111-71#20351#20422
35K → 23M76121-45#20422#20467
23M → 24M2190+219#20467#20248
24M → 40K1900+190#20248#20058
40K → 25.2M812+79#20058#19979
25.2M → Finish11830+88#19979#19891
TOTALS2818925+1893
📊

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