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BOSTON MARATHON 2025

Chang Kim

Bib: 18430•M

IL

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
Top 40%
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
7:44/mi
24:02
↑ 97↓ 3451.5%
10K· 6.21 mi
8:03/mi
49:02
↑ 79↓ 1380.4%
15K· 9.32 mi
8:04/mi
1:14:05
↑ 67↓ 78
20K· 12.43 mi
8:21/mi
1:40:00
↑ 106↓ 860.1%
Half· 13.11 mi
8:23/mi
1:45:43
↑ 19↓ 370.5%
25K· 15.53 mi
8:26/mi
2:06:11
↑ 66↓ 880.2%
30K· 18.64 mi
8:47/mi
2:33:28
↑ 181↓ 1480.2%
20M
9:05/mi
2:45:49
↑ 64↓ 500.2%
21M
9:39/mi
2:55:28
↑ 106↓ 241.6%
35K· 21.75 mi
8:33/mi
3:01:52
↑ 17↓ 861.7%
23M
9:21/mi
3:13:34
↑ 23↓ 630.6%
24M
9:20/mi
3:22:54
↓ 821.3%
40K· 24.85 mi
9:49/mi
3:31:18
↓ 200.3%
25.2M
11:33/mi
3:35:17
↑ 13↓ 160.2%
Finish· 26.22 mi
10:45/mi
3:46:14
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:45:43
Pace8:04 /mi
2nd Half
Distance13.11 mi
Time2:00:31
Pace9:12 /mi
📊Positive Split: 14.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:18:1224:027:4424:02
7:44
-
10K
6.21 mi11:43:1249:027:5325:00
8:03
+0:19
15K
9.32 mi12:08:151:14:057:5725:03
8:04
+0:01
20K
12.43 mi12:34:101:40:008:0325:55
8:21
+0:17
Half
13.11 mi12:39:531:45:438:045:43
8:23
+0:02
25K
15.53 mi13:00:212:06:118:0720:28
8:26
+0:03
30K
18.64 mi13:27:382:33:288:1427:17
8:47
+0:21
20M
20.00 mi13:39:592:45:498:1712:21
9:05
+0:18
21M
21.00 mi13:49:382:55:288:219:39
9:39
+0:34
35K
21.75 mi13:56:023:01:528:226:24
8:33
-1:06
23M
23.00 mi14:07:443:13:348:2511:42
9:21
+0:48
24M
24.00 mi14:17:043:22:548:279:20
9:20
-0:01
40K
24.85 mi14:25:283:31:188:308:24
9:49
+0:29
25.2M
25.20 mi14:29:273:35:178:333:59
11:33
+1:44
Finish
26.22 mi14:40:243:46:148:3810:57
10:45
-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

7:44 /mi

Average Pace

8:38 /mi

Slowest Pace

11:33 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:14:05

33% of race

Time at Steady Pace

1:38:08

43% of race

Time at Slower Pace

54:01

24% of race

Average Pace: 8:38 /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 mi11:18:1224:027:4424:02
7:44
#14254
10K
6.21 mi11:43:1249:027:5325:00
8:03
#15588
15K
9.32 mi12:08:151:14:057:5725:03
8:04
#15898
20K
12.43 mi12:34:101:40:008:0325:55
8:21
#16292
Half
13.11 mi12:39:531:45:438:045:43
8:23
#16413
25K
15.53 mi13:00:212:06:118:0720:28
8:26
#16472
30K
18.64 mi13:27:382:33:288:1427:17
8:47
#16423
20M
20.00 mi13:39:592:45:498:1712:21
9:05
#16447
21M
21.00 mi13:49:382:55:288:219:39
9:39
#16423
35K
21.75 mi13:56:023:01:528:226:24
8:33
#16368
23M
23.00 mi14:07:443:13:348:2511:42
9:21
#16437
24M
24.00 mi14:17:043:22:548:279:20
9:20
#16582
40K
24.85 mi14:25:283:31:188:308:24
9:49
#16746
25.2M
25.20 mi14:29:273:35:178:333:59
11:33
#16897
Finish
26.22 mi14:40:243:46:148:3810:57
10:45
#17434
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM60-64Seg. OverallSeg. MalesSeg. M60-64
5K3.11 mi3.11 mi14254101441014416496(Top 58%)11014(Top 68%)11014(Top 875%)
10K6.21 mi3.10 mi15588-133410652-50810652-50816807(Top 59%)11165(Top 69%)11165(Top 887%)
15K9.32 mi3.11 mi15898-31010771-11910771-11916496(Top 58%)11014(Top 68%)11014(Top 875%)
20K12.43 mi3.11 mi16292-39410922-15110922-15117161(Top 60%)11249(Top 70%)11249(Top 893%)
Half13.11 mi0.68 mi16413-12110983-6110983-6118429(Top 65%)11791(Top 73%)11791(Top 937%)
25K15.53 mi2.42 mi16472-5910978+510978+516812(Top 59%)11022(Top 68%)11022(Top 875%)
30K18.64 mi3.11 mi16423+4910893+8510893+8516485(Top 58%)10707(Top 66%)10707(Top 850%)
20M20.00 mi1.36 mi16447-2410873+2010873+2017242(Top 61%)10921(Top 68%)10921(Top 867%)
21M21.00 mi1.00 mi16423+2410836+3710836+3716769(Top 59%)10593(Top 66%)10593(Top 841%)
35K21.75 mi0.75 mi16368+5510800+3610800+3615789(Top 56%)10091(Top 63%)10091(Top 802%)
23M23.00 mi1.25 mi16437-6910801-110801-117981(Top 63%)10959(Top 68%)10959(Top 870%)
24M24.00 mi1.00 mi16582-14510833-3210833-3218946(Top 67%)11382(Top 71%)11382(Top 904%)
40K24.85 mi0.85 mi16746-16410860-2710860-2719876(Top 70%)11738(Top 73%)11738(Top 932%)
25.2M25.20 mi0.35 mi16897-15110910-5010910-5022143(Top 78%)12848(Top 80%)12848(Top 1020%)
Finish26.22 mi1.02 mi17434-53711112-20211112-20224824(Top 87%)14181(Top 88%)14181(Top 1126%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 58%
×21story building
+97ft-345ft

Overall

16496

Males

11014

M60-64

11014

5K→10K

3.1 - 6.2 mi

Top 59%
×5story building
+79ft-138ft

Overall

16807

Males

11165

M60-64

11165

10K→15K

6.2 - 9.3 mi

Top 58%
×3story building
+67ft-78ft

Overall

16496

Males

11014

M60-64

11014

15K→20K

9.3 - 12.4 mi

Top 60%
×5story building
+106ft-86ft

Overall

17161

Males

11249

M60-64

11249

20K→Half

12.4 - 13.1 mi

Top 65%
×2story building
+19ft-37ft

Overall

18429

Males

11791

M60-64

11791

Half→25K

13.1 - 15.5 mi

Top 59%
×4story building
+66ft-88ft

Overall

16812

Males

11022

M60-64

11022

25K→30K

15.5 - 18.6 mi

Top 58%
×9story building
+181ft-148ft

Overall

16485

Males

10707

M60-64

10707

30K→20M

18.6 - 20.0 mi

Top 61%
×5story building
+64ft-50ft

Overall

17242

Males

10921

M60-64

10921

20M→21M

20.0 - 21.0 mi

Top 59%
×8story building
+106ft-24ft

Overall

16769

Males

10593

M60-64

10593

21M→35K

21.0 - 21.8 mi

Top 56%
×7story building
+17ft-86ft

Overall

15789

Males

10091

M60-64

10091

35K→23M

21.8 - 23.0 mi

Top 63%
×5story building
+23ft-63ft

Overall

17981

Males

10959

M60-64

10959

23M→24M

23.0 - 24.0 mi

Top 67%
×6story building
+12ft-82ft

Overall

18946

Males

11382

M60-64

11382

24M→40K

24.0 - 24.9 mi

Top 70%
×1story
+6ft-20ft

Overall

19876

Males

11738

M60-64

11738

40K→25.2M

24.9 - 25.2 mi

Top 78%
×1story
+13ft-16ft

Overall

22143

Males

12848

M60-64

12848

25.2M→Finish

25.2 - 26.2 mi

Top 87%
×2story building
+22ft-21ft

Overall

24824

Males

14181

M60-64

14181

Passing Analysis

Category:
Athletes Passed
1155
Passed By
4335
Net Change
-3180
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#14254
5K → 10K391373-1334#14254#15588
10K → 15K116426-310#15588#15898
15K → 20K101495-394#15898#16292
20K → Half8129-121#16292#16413
Half → 25K127186-59#16413#16472
25K → 30K263214+49#16472#16423
30K → 20M100124-24#16423#16447
20M → 21M12197+24#16447#16423
21M → 35K8631+55#16423#16368
35K → 23M98167-69#16368#16437
23M → 24M35180-145#16437#16582
24M → 40K46210-164#16582#16746
40K → 25.2M8159-151#16746#16897
25.2M → Finish7544-537#16897#17434
TOTALS11554335-3180
📊

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