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BOSTON MARATHON 2025

Youngkyun Kim

Bib: 14381 M KR

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 34%
Gender (Male)
#0 / 16105
Top 47%
Masters (Masters Men)
#0 / 10463
Top 35%
Division (M50-54)
#0 / 1996
Top 35%
Race Day Weather
50°/40°F
broken clouds

Race Timeline

Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
469 ft elev
5K· 3.11 mi
6:55/mi
21:30
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
6:41/mi
42:16
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
6:50/mi
1:03:30
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
7:07/mi
1:25:36
↑ 106↓ 860.1%
165 ft elev
Half· 13.11 mi
7:17/mi
1:30:34
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
9:17/mi
1:53:05
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
8:22/mi
2:19:05
↑ 181↓ 1480.2%
138 ft elev
20M
7:57/mi
2:29:53
↑ 64↓ 500.2%
148 ft elev
21M
8:31/mi
2:38:24
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
7:28/mi
2:43:59
↑ 17↓ 861.7%
156 ft elev
23M
7:39/mi
2:53:34
↑ 23↓ 630.6%
116 ft elev
24M
7:07/mi
3:00:41
↓ 821.3%
34 ft elev
40K· 24.85 mi
7:40/mi
3:07:14
↓ 200.3%
20 ft elev
25.2M
8:36/mi
3:10:12
↑ 13↓ 160.2%
18 ft elev
Finish· 26.22 mi
7:46/mi
3:18:07
↑ 22↓ 21
17 ft elev
Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent

The Course

Half Splits

1st Half· via Half
1:30:346:55 /mi⚡ faster
2nd Half
1:47:338:12 /mi+18.8%
Positive split — 18.8% slower in the second half
Is this your race?

Your race, unpacked

See your splits, ranks & AI insights.

Checkpoint Splits

CheckpointTimeAvg PaceSegment LengthSegment TimeSegment PaceTrendDiff
5K
21:306:553.11 mi21:30
6:55
-
10K
42:166:483.10 mi20:46
6:41
-0:14
15K
1:03:306:493.11 mi21:14
6:50
+0:09
20K
1:25:366:533.11 mi22:06
7:07
+0:17
Half(13.11 mi)
1:30:346:550.68 mi4:58
7:17
+0:10
25K
1:53:057:172.42 mi22:31
9:17
+2:00
30K
2:19:057:283.11 mi26:00
8:22
-0:55
20M
2:29:537:301.36 mi10:48
7:57
-0:25
21M
2:38:247:331.00 mi8:31
8:31
+0:34
35K
2:43:597:320.75 mi5:35
7:28
-1:03
23M
2:53:347:331.25 mi9:35
7:39
+0:11
24M
3:00:417:321.00 mi7:07
7:07
-0:32
40K
3:07:147:320.85 mi6:33
7:40
+0:33
25.2M
3:10:127:330.35 mi2:58
8:36
+0:56
Finish(26.22 mi)
3:18:077:341.02 mi7:55
7:46
-0:50
Trend:
Faster pace
Steady pace
Slower pace

Checkpoints & Pacing

Pace Line

Fastest Pace

6:41 /mi

Average Pace

7:34 /mi

Slowest Pace

9:17 /mi

Loading chart...
Fastest
Middle
Slowest
Average

Segments

Time at Faster Pace

1:37:41

49% of race

Time at Steady Pace

40:26

20% of race

Time at Slower Pace

1:00:00

30% of race

Average Pace: 7:33 /mi

Loading chart...
Faster pace (< avg)
Steady pace (≈ avg)
Slower pace (> avg)

Heatmap

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0mi6.6mi13.1mi19.7mi26.2mi
Pace:
Faster
Steady
Slower

Checkpoint and Segment Rankings

CheckpointSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi723164726472644358265826
10K3.10 mi6321+9105783+6895783+689522348524852
15K3.11 mi6324-35769+145769+14644358265826
20K3.11 mi6743-4196082-3136082-313760366176617
Half(13.11 mi)0.68 mi6897-1546197-1156197-115976978977897
25K2.42 mi9393-24967743-15467743-1546211121289812898
30K3.11 mi10243-8508139-3968139-3961393795669566
20M1.36 mi10195+488088+518088+511006575757575
21M1.00 mi10183+128023+658023+651054376327632
35K0.75 mi10084+997946+777946+77835765216521
23M1.25 mi9911+1737816+1307816+130761159415941
24M1.00 mi9621+2907641+1757641+175531544824482
40K0.85 mi9520+1017555+867555+86782458995899
25.2M0.35 mi9501+197525+307525+30937066226622
Finish(26.22 mi)1.02 mi9555-547507+187507+181118476027602

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 23%
×21story building
+97ft-345ft

Overall

6443

Males

5826

M50-54

5826

5K→10K

3.1 - 6.2 mi

Top 18%
×5story building
+79ft-138ft

Overall

5223

Males

4852

M50-54

4852

10K→15K

6.2 - 9.3 mi

Top 23%
×3story building
+67ft-78ft

Overall

6443

Males

5826

M50-54

5826

15K→20K

9.3 - 12.4 mi

Top 27%
×5story building
+106ft-86ft

Overall

7603

Males

6617

M50-54

6617

20K→Half

12.4 - 13.1 mi

Top 34%
×2story building
+19ft-37ft

Overall

9769

Males

7897

M50-54

7897

Half→25K

13.1 - 15.5 mi

Top 74%
×4story building
+66ft-88ft

Overall

21112

Males

12898

M50-54

12898

25K→30K

15.5 - 18.6 mi

Top 49%
×9story building
+181ft-148ft

Overall

13937

Males

9566

M50-54

9566

30K→20M

18.6 - 20.0 mi

Top 35%
×5story building
+64ft-50ft

Overall

10065

Males

7575

M50-54

7575

20M→21M

20.0 - 21.0 mi

Top 37%
×8story building
+106ft-24ft

Overall

10543

Males

7632

M50-54

7632

21M→35K

21.0 - 21.8 mi

Top 29%
×7story building
+17ft-86ft

Overall

8357

Males

6521

M50-54

6521

35K→23M

21.8 - 23.0 mi

Top 27%
×5story building
+23ft-63ft

Overall

7611

Males

5941

M50-54

5941

23M→24M

23.0 - 24.0 mi

Top 19%
×6story building
+12ft-82ft

Overall

5315

Males

4482

M50-54

4482

24M→40K

24.0 - 24.9 mi

Top 28%
×1story
+6ft-20ft

Overall

7824

Males

5899

M50-54

5899

40K→25.2M

24.9 - 25.2 mi

Top 33%
×1story
+13ft-16ft

Overall

9370

Males

6622

M50-54

6622

25.2M→Finish

25.2 - 26.2 mi

Top 39%
×2story building
+22ft-21ft

Overall

11184

Males

7602

M50-54

7602

Passing Analysis

Category:
Passed
2264*
Passed By
4586
Net Change
-2324
SegmentPassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#7231
5K → 10K9199+910#7231#6321
10K → 15K145148-3#6321#6324
15K → 20K47466-419#6324#6743
20K → Half3157-154#6743#6897
Half → 25K22498-2496#6897#9393
25K → 30K64912-850#9393#10243
30K → 20M13991+48#10243#10195
20M → 21M114102+12#10195#10183
21M → 35K11516+99#10183#10084
35K → 23M199*26+173#10084#9911
23M → 24M2911+290#9911#9621
24M → 40K12322+101#9621#9520
40K → 25.2M4223+19#9520#9501
25.2M → Finish61115-54#9501#9555
TOTALS2264*4586-2324

* Includes athletes who did not complete a segment (DNF/DNQ).

Passing Charts

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