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BOSTON MARATHON 2025

Henry Kim

Bib: 4056•M

NY

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 12%
Gender (Male)
#0 / 16105
Top 20%
Division (M18-39)
#0 / 5642
Top 43%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:41
Rank: #5077
Start → 5K
20:41 | 6:39/mi
10K· 6.21 mi
41:17
Rank: #4863 (+214)
5K → 10K
20:36 | 6:38/mi
15K· 9.32 mi
1:01:33
Rank: #4427 (+436)
10K → 15K
20:16 | 6:31/mi
20K· 12.43 mi
1:22:08
Rank: #4248 (+179)
15K → 20K
20:35 | 6:38/mi
Half· 13.11 mi
1:26:39
Rank: #4246 (+2)
20K → Half
4:31 | 6:37/mi
25K· 15.53 mi
1:42:49
Rank: #4143 (+103)
Half → 25K
16:10 | 6:40/mi
30K· 18.64 mi
2:04:04
Rank: #3982 (+161)
25K → 30K
21:15 | 6:50/mi
20M
2:13:29
Rank: #3939 (+43)
30K → 20M
9:25 | 6:56/mi
21M
2:20:41
Rank: #3841 (+98)
20M → 21M
7:12 | 7:12/mi
35K· 21.75 mi
2:25:45
Rank: #3833 (+8)
21M → 35K
5:04 | 6:46/mi
23M
2:34:21
Rank: #3741 (+92)
35K → 23M
8:36 | 6:52/mi
24M
2:40:59
Rank: #3664 (+77)
23M → 24M
6:38 | 6:38/mi
40K· 24.85 mi
2:46:47
Rank: #3585 (+79)
24M → 40K
5:48 | 6:47/mi
25.2M
2:49:16
Rank: #3529 (+56)
40K → 25.2M
2:29 | 7:12/mi
Finish· 26.22 mi
2:55:40
Rank: #3399 (+130)
25.2M → Finish
6:24 | 6:17/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:26:39
Pace6:37 /mi
2nd Half
Distance13.11 mi
Time1:29:01
Pace6:47 /mi
📊Positive Split: 2.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:23:1920:416:3920:41
6:39
-
10K
6.21 mi10:43:5541:176:3920:36
6:38
-0:01
15K
9.32 mi11:04:111:01:336:3620:16
6:31
-0:07
20K
12.43 mi11:24:461:22:086:3720:35
6:38
+0:07
Half
13.11 mi11:29:171:26:396:374:31
6:37
-0:01
25K
15.53 mi11:45:271:42:496:3716:10
6:40
+0:03
30K
18.64 mi12:06:422:04:046:3921:15
6:50
+0:10
20M
20.00 mi12:16:072:13:296:409:25
6:56
+0:06
21M
21.00 mi12:23:192:20:416:427:12
7:12
+0:16
35K
21.75 mi12:28:232:25:456:425:04
6:46
-0:26
23M
23.00 mi12:36:592:34:216:438:36
6:52
+0:06
24M
24.00 mi12:43:372:40:596:426:38
6:38
-0:14
40K
24.85 mi12:49:252:46:476:435:48
6:47
+0:09
25.2M
25.20 mi12:51:542:49:166:432:29
7:12
+0:25
Finish
26.22 mi12:58:182:55:406:426:24
6:17
-0:55

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

6:17 /mi

Average Pace

6:42 /mi

Slowest Pace

7:12 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:36:34

89% of race

Time at Steady Pace

19:06

11% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:42 /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 mi10:23:1920:416:3920:41
6:39
#5077
10K
6.21 mi10:43:5541:176:3920:36
6:38
#4863
15K
9.32 mi11:04:111:01:336:3620:16
6:31
#4427
20K
12.43 mi11:24:461:22:086:3720:35
6:38
#4248
Half
13.11 mi11:29:171:26:396:374:31
6:37
#4246
25K
15.53 mi11:45:271:42:496:3716:10
6:40
#4143
30K
18.64 mi12:06:422:04:046:3921:15
6:50
#3982
20M
20.00 mi12:16:072:13:296:409:25
6:56
#3939
21M
21.00 mi12:23:192:20:416:427:12
7:12
#3841
35K
21.75 mi12:28:232:25:456:425:04
6:46
#3833
23M
23.00 mi12:36:592:34:216:438:36
6:52
#3741
24M
24.00 mi12:43:372:40:596:426:38
6:38
#3664
40K
24.85 mi12:49:252:46:476:435:48
6:47
#3585
25.2M
25.20 mi12:51:542:49:166:432:29
7:12
#3529
Finish
26.22 mi12:58:182:55:406:426:24
6:17
#3399
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi5077473947393711(Top 13%)3504(Top 22%)3504(Top 62%)
10K6.21 mi3.10 mi4863+2144544+1954544+1954708(Top 17%)4408(Top 27%)4408(Top 78%)
15K9.32 mi3.11 mi4427+4364163+3814163+3813711(Top 13%)3504(Top 22%)3504(Top 62%)
20K12.43 mi3.11 mi4248+1793993+1703993+1703870(Top 14%)3648(Top 23%)3648(Top 65%)
Half13.11 mi0.68 mi4246+2399339934601(Top 16%)4294(Top 27%)4294(Top 76%)
25K15.53 mi2.42 mi4143+1033892+1013892+1013905(Top 14%)3652(Top 23%)3652(Top 65%)
30K18.64 mi3.11 mi3982+1613743+1493743+1493690(Top 13%)3415(Top 21%)3415(Top 61%)
20M20.00 mi1.36 mi3939+433699+443699+443700(Top 13%)3406(Top 21%)3406(Top 60%)
21M21.00 mi1.00 mi3841+983608+913608+913151(Top 11%)2908(Top 18%)2908(Top 52%)
35K21.75 mi0.75 mi3833+83595+133595+133952(Top 14%)3552(Top 22%)3552(Top 63%)
23M23.00 mi1.25 mi3741+923506+893506+893069(Top 11%)2808(Top 17%)2808(Top 50%)
24M24.00 mi1.00 mi3664+773428+783428+782660(Top 9%)2443(Top 15%)2443(Top 43%)
40K24.85 mi0.85 mi3585+793351+773351+772775(Top 10%)2519(Top 16%)2519(Top 45%)
25.2M25.20 mi0.35 mi3529+563297+543297+542191(Top 8%)1980(Top 12%)1980(Top 35%)
Finish26.22 mi1.02 mi3399+1303182+1153182+1151833(Top 6%)1696(Top 11%)1696(Top 30%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 13%
×21stories
+97ft-345ft

Overall

3711

Males

3504

M18-39

3504

5K→10K

3.1 - 6.2 mi

Top 17%
×5stories
+79ft-138ft

Overall

4708

Males

4408

M18-39

4408

10K→15K

6.2 - 9.3 mi

Top 13%
×3stories
+67ft-78ft

Overall

3711

Males

3504

M18-39

3504

15K→20K

9.3 - 12.4 mi

Top 14%
×5stories
+106ft-86ft

Overall

3870

Males

3648

M18-39

3648

20K→Half

12.4 - 13.1 mi

Top 16%
×2stories
+19ft-37ft

Overall

4601

Males

4294

M18-39

4294

Half→25K

13.1 - 15.5 mi

Top 14%
×4stories
+66ft-88ft

Overall

3905

Males

3652

M18-39

3652

25K→30K

15.5 - 18.6 mi

Top 13%
×9stories
+181ft-148ft

Overall

3690

Males

3415

M18-39

3415

30K→20M

18.6 - 20.0 mi

Top 13%
×5stories
+64ft-50ft

Overall

3700

Males

3406

M18-39

3406

20M→21M

20.0 - 21.0 mi

Top 11%
×8stories
+106ft-24ft

Overall

3151

Males

2908

M18-39

2908

21M→35K

21.0 - 21.8 mi

Top 14%
×7stories
+17ft-86ft

Overall

3952

Males

3552

M18-39

3552

35K→23M

21.8 - 23.0 mi

Top 11%
×5stories
+23ft-63ft

Overall

3069

Males

2808

M18-39

2808

23M→24M

23.0 - 24.0 mi

Top 9%
×6stories
+12ft-82ft

Overall

2660

Males

2443

M18-39

2443

24M→40K

24.0 - 24.9 mi

Top 10%
×1story
+6ft-20ft

Overall

2775

Males

2519

M18-39

2519

40K→25.2M

24.9 - 25.2 mi

Top 8%
×1story
+13ft-16ft

Overall

2191

Males

1980

M18-39

1980

25.2M→Finish

25.2 - 26.2 mi

Top 6%
×2stories
+22ft-21ft

Overall

1833

Males

1696

M18-39

1696

Passing Analysis

Category:
Athletes Passed
2032
Passed By
354
Net Change
+1678
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#5077
5K → 10K29884+214#5077#4863
10K → 15K4393+436#4863#4427
15K → 20K20728+179#4427#4248
20K → Half2523+2#4248#4246
Half → 25K14340+103#4246#4143
25K → 30K20847+161#4143#3982
30K → 20M7330+43#3982#3939
20M → 21M11618+98#3939#3841
21M → 35K3426+8#3841#3833
35K → 23M11018+92#3833#3741
23M → 24M9013+77#3741#3664
24M → 40K9516+79#3664#3585
40K → 25.2M582+56#3585#3529
25.2M → Finish1366+130#3529#3399
TOTALS2032354+1678
📊

Passing Visuals

Category:
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🔥Passing Intensity

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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