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BOSTON MARATHON 2025

Chang Ho Kim

Bib: 18774•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M55-59)
#0 / 1648
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
7:43/mi
23:57
↑ 97↓ 3451.5%
10K· 6.21 mi
7:49/mi
48:14
↑ 79↓ 1380.4%
15K· 9.32 mi
7:59/mi
1:13:01
↑ 67↓ 78
20K· 12.43 mi
8:09/mi
1:38:20
↑ 106↓ 860.1%
Half· 13.11 mi
8:04/mi
1:43:50
↑ 19↓ 370.5%
25K· 15.53 mi
9:04/mi
2:05:49
↑ 66↓ 880.2%
30K· 18.64 mi
10:12/mi
2:37:30
↑ 181↓ 1480.2%
20M
10:38/mi
2:51:57
↑ 64↓ 500.2%
21M
11:45/mi
3:03:42
↑ 106↓ 241.6%
35K· 21.75 mi
10:04/mi
3:11:14
↑ 17↓ 861.7%
23M
10:52/mi
3:24:50
↑ 23↓ 630.6%
24M
10:12/mi
3:35:02
↓ 821.3%
40K· 24.85 mi
10:02/mi
3:43:37
↓ 200.3%
25.2M
11:04/mi
3:47:26
↑ 13↓ 160.2%
Finish· 26.22 mi
8:40/mi
3:56:16
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:43:50
Pace7:55 /mi
2nd Half
Distance13.11 mi
Time2:12:26
Pace10:06 /mi
📊Positive Split: 27.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:15:4723:577:4323:57
7:43
-
10K
6.21 mi11:40:0448:147:4624:17
7:49
+0:06
15K
9.32 mi12:04:511:13:017:5024:47
7:59
+0:10
20K
12.43 mi12:30:101:38:207:5525:19
8:09
+0:10
Half
13.11 mi12:35:401:43:507:555:30
8:04
-0:05
25K
15.53 mi12:57:392:05:498:0621:59
9:04
+1:00
30K
18.64 mi13:29:202:37:308:2731:41
10:12
+1:08
20M
20.00 mi13:43:472:51:578:3614:27
10:38
+0:26
21M
21.00 mi13:55:323:03:428:4511:45
11:45
+1:07
35K
21.75 mi14:03:043:11:148:487:32
10:04
-1:41
23M
23.00 mi14:16:403:24:508:5413:36
10:52
+0:48
24M
24.00 mi14:26:523:35:028:5810:12
10:12
-0:40
40K
24.85 mi14:35:273:43:379:008:35
10:02
-0:10
25.2M
25.20 mi14:39:163:47:269:023:49
11:04
+1:02
Finish
26.22 mi14:48:063:56:169:018:50
8:40
-2:24

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

7:43 /mi

Average Pace

9:01 /mi

Slowest Pace

11:45 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:14:39

57% of race

Time at Steady Pace

1:12:27

31% of race

Time at Slower Pace

29:10

12% of race

Average Pace: 9:01 /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 mi11:15:4723:577:4323:57
7:43
#14045
10K
6.21 mi11:40:0448:147:4624:17
7:49
#14446
15K
9.32 mi12:04:511:13:017:5024:47
7:59
#14923
20K
12.43 mi12:30:101:38:207:5525:19
8:09
#15217
Half
13.11 mi12:35:401:43:507:555:30
8:04
#15284
25K
15.53 mi12:57:392:05:498:0621:59
9:04
#16324
30K
18.64 mi13:29:202:37:308:2731:41
10:12
#17781
20M
20.00 mi13:43:472:51:578:3614:27
10:38
#18414
21M
21.00 mi13:55:323:03:428:4511:45
11:45
#18890
35K
21.75 mi14:03:043:11:148:487:32
10:04
#19073
23M
23.00 mi14:16:403:24:508:5413:36
10:52
#19442
24M
24.00 mi14:26:523:35:028:5810:12
10:12
#19596
40K
24.85 mi14:35:273:43:379:008:35
10:02
#19672
25.2M
25.20 mi14:39:163:47:269:023:49
11:04
#19693
Finish
26.22 mi14:48:063:56:169:018:50
8:40
#19608
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM55-59Seg. OverallSeg. MalesSeg. M55-59
5K3.11 mi3.11 mi14045100691006915861(Top 56%)10744(Top 67%)10744(Top 652%)
10K6.21 mi3.10 mi14446-40110202-13310202-13314963(Top 53%)10412(Top 65%)10412(Top 632%)
15K9.32 mi3.11 mi14923-47710371-16910371-16915861(Top 56%)10744(Top 67%)10744(Top 652%)
20K12.43 mi3.11 mi15217-29410466-9510466-9515972(Top 56%)10734(Top 67%)10734(Top 651%)
Half13.11 mi0.68 mi15284-6710498-3210498-3216363(Top 58%)10939(Top 68%)10939(Top 664%)
25K15.53 mi2.42 mi16324-104010921-42310921-42320199(Top 71%)12499(Top 78%)12499(Top 758%)
30K18.64 mi3.11 mi17781-145711457-53611457-53622175(Top 78%)13254(Top 82%)13254(Top 804%)
20M20.00 mi1.36 mi18414-63311714-25711714-25722765(Top 80%)13411(Top 83%)13411(Top 814%)
21M21.00 mi1.00 mi18890-47611894-18011894-18023114(Top 81%)13505(Top 84%)13505(Top 819%)
35K21.75 mi0.75 mi19073-18311959-6511959-6522086(Top 78%)12949(Top 80%)12949(Top 786%)
23M23.00 mi1.25 mi19442-36912079-12012079-12022891(Top 81%)13287(Top 83%)13287(Top 806%)
24M24.00 mi1.00 mi19596-15412120-4112120-4121921(Top 77%)12767(Top 79%)12767(Top 775%)
40K24.85 mi0.85 mi19672-7612140-2012140-2020559(Top 72%)12070(Top 75%)12070(Top 732%)
25.2M25.20 mi0.35 mi19693-2112137+312137+320817(Top 73%)12193(Top 76%)12193(Top 740%)
Finish26.22 mi1.02 mi19608+8512082+5512082+5517269(Top 61%)10537(Top 65%)10537(Top 639%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 56%
×21story building
+97ft-345ft

Overall

15861

Males

10744

M55-59

10744

5K→10K

3.1 - 6.2 mi

Top 53%
×5story building
+79ft-138ft

Overall

14963

Males

10412

M55-59

10412

10K→15K

6.2 - 9.3 mi

Top 56%
×3story building
+67ft-78ft

Overall

15861

Males

10744

M55-59

10744

15K→20K

9.3 - 12.4 mi

Top 56%
×5story building
+106ft-86ft

Overall

15972

Males

10734

M55-59

10734

20K→Half

12.4 - 13.1 mi

Top 58%
×2story building
+19ft-37ft

Overall

16363

Males

10939

M55-59

10939

Half→25K

13.1 - 15.5 mi

Top 71%
×4story building
+66ft-88ft

Overall

20199

Males

12499

M55-59

12499

25K→30K

15.5 - 18.6 mi

Top 78%
×9story building
+181ft-148ft

Overall

22175

Males

13254

M55-59

13254

30K→20M

18.6 - 20.0 mi

Top 80%
×5story building
+64ft-50ft

Overall

22765

Males

13411

M55-59

13411

20M→21M

20.0 - 21.0 mi

Top 81%
×8story building
+106ft-24ft

Overall

23114

Males

13505

M55-59

13505

21M→35K

21.0 - 21.8 mi

Top 78%
×7story building
+17ft-86ft

Overall

22086

Males

12949

M55-59

12949

35K→23M

21.8 - 23.0 mi

Top 81%
×5story building
+23ft-63ft

Overall

22891

Males

13287

M55-59

13287

23M→24M

23.0 - 24.0 mi

Top 77%
×6story building
+12ft-82ft

Overall

21921

Males

12767

M55-59

12767

24M→40K

24.0 - 24.9 mi

Top 72%
×1story
+6ft-20ft

Overall

20559

Males

12070

M55-59

12070

40K→25.2M

24.9 - 25.2 mi

Top 73%
×1story
+13ft-16ft

Overall

20817

Males

12193

M55-59

12193

25.2M→Finish

25.2 - 26.2 mi

Top 61%
×2story building
+22ft-21ft

Overall

17269

Males

10537

M55-59

10537

Passing Analysis

Category:
Athletes Passed
725
Passed By
6288
Net Change
-5563
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#14045
5K → 10K151552-401#14045#14446
10K → 15K81558-477#14446#14923
15K → 20K133427-294#14923#15217
20K → Half2188-67#15217#15284
Half → 25K241064-1040#15284#16324
25K → 30K241481-1457#16324#17781
30K → 20M25658-633#17781#18414
20M → 21M20496-476#18414#18890
21M → 35K24207-183#18890#19073
35K → 23M25394-369#19073#19442
23M → 24M32186-154#19442#19596
24M → 40K42118-76#19596#19672
40K → 25.2M1839-21#19672#19693
25.2M → Finish10520+85#19693#19608
TOTALS7256288-5563
📊

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