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BOSTON MARATHON 2025

Jeongchil Kim

Bib: 21511•M

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 18%
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
7:54/mi
24:32
↑ 97↓ 3451.5%
10K· 6.21 mi
8:06/mi
49:41
↑ 79↓ 1380.4%
15K· 9.32 mi
8:04/mi
1:14:44
↑ 67↓ 78
20K· 12.43 mi
8:16/mi
1:40:24
↑ 106↓ 860.1%
Half· 13.11 mi
8:02/mi
1:45:53
↑ 19↓ 370.5%
25K· 15.53 mi
8:21/mi
2:06:08
↑ 66↓ 880.2%
30K· 18.64 mi
8:35/mi
2:32:48
↑ 181↓ 1480.2%
20M
8:53/mi
2:44:52
↑ 64↓ 500.2%
21M
10:11/mi
2:55:03
↑ 106↓ 241.6%
35K· 21.75 mi
9:01/mi
3:01:48
↑ 17↓ 861.7%
23M
10:17/mi
3:14:40
↑ 23↓ 630.6%
24M
8:28/mi
3:23:08
↓ 821.3%
40K· 24.85 mi
9:03/mi
3:30:52
↓ 200.3%
25.2M
10:58/mi
3:34:39
↑ 13↓ 160.2%
Finish· 26.22 mi
9:12/mi
3:44:02
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:45:53
Pace8:05 /mi
2nd Half
Distance13.11 mi
Time1:58:09
Pace9:01 /mi
📊Positive Split: 11.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:19:0524:327:5424:32
7:54
-
10K
6.21 mi11:44:1449:418:0025:09
8:06
+0:12
15K
9.32 mi12:09:171:14:448:0125:03
8:04
-0:02
20K
12.43 mi12:34:571:40:248:0525:40
8:16
+0:12
Half
13.11 mi12:40:261:45:538:055:29
8:02
-0:14
25K
15.53 mi13:00:412:06:088:0720:15
8:21
+0:19
30K
18.64 mi13:27:212:32:488:1226:40
8:35
+0:14
20M
20.00 mi13:39:252:44:528:1512:04
8:53
+0:18
21M
21.00 mi13:49:362:55:038:2010:11
10:11
+1:18
35K
21.75 mi13:56:213:01:488:226:45
9:01
-1:10
23M
23.00 mi14:09:133:14:408:2812:52
10:17
+1:16
24M
24.00 mi14:17:413:23:088:288:28
8:28
-1:49
40K
24.85 mi14:25:253:30:528:297:44
9:03
+0:35
25.2M
25.20 mi14:29:123:34:398:313:47
10:58
+1:55
Finish
26.22 mi14:38:353:44:028:339:23
9:12
-1:46

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

7:54 /mi

Average Pace

8:33 /mi

Slowest Pace

10:58 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:20:13

36% of race

Time at Steady Pace

1:39:52

45% of race

Time at Slower Pace

43:57

20% of race

Average Pace: 8:33 /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 mi11:19:0524:327:5424:32
7:54
#15643
10K
6.21 mi11:44:1449:418:0025:09
8:06
#16473
15K
9.32 mi12:09:171:14:448:0125:03
8:04
#16469
20K
12.43 mi12:34:571:40:248:0525:40
8:16
#16521
Half
13.11 mi12:40:261:45:538:055:29
8:02
#16510
25K
15.53 mi13:00:412:06:088:0720:15
8:21
#16449
30K
18.64 mi13:27:212:32:488:1226:40
8:35
#16189
20M
20.00 mi13:39:252:44:528:1512:04
8:53
#16158
21M
21.00 mi13:49:362:55:038:2010:11
10:11
#16300
35K
21.75 mi13:56:213:01:488:226:45
9:01
#16347
23M
23.00 mi14:09:133:14:408:2812:52
10:17
#16779
24M
24.00 mi14:17:413:23:088:288:28
8:28
#16646
40K
24.85 mi14:25:253:30:528:297:44
9:03
#16629
25.2M
25.20 mi14:29:123:34:398:313:47
10:58
#16729
Finish
26.22 mi14:38:353:44:028:339:23
9:12
#16909
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM65-69Seg. OverallSeg. MalesSeg. M65-69
5K3.11 mi3.11 mi15643106801068016495(Top 58%)11013(Top 68%)11013(Top 1723%)
10K6.21 mi3.10 mi16473-83011001-32111001-32117144(Top 60%)11311(Top 70%)11311(Top 1770%)
15K9.32 mi3.11 mi16469+411002-111002-116495(Top 58%)11013(Top 68%)11013(Top 1723%)
20K12.43 mi3.11 mi16521-5211029-2711029-2716692(Top 59%)11046(Top 69%)11046(Top 1729%)
Half13.11 mi0.68 mi16510+1111019+1011019+1016165(Top 57%)10838(Top 67%)10838(Top 1696%)
25K15.53 mi2.42 mi16449+6110968+5110968+5116243(Top 57%)10753(Top 67%)10753(Top 1683%)
30K18.64 mi3.11 mi16189+26010810+15810810+15815282(Top 54%)10180(Top 63%)10180(Top 1593%)
20M20.00 mi1.36 mi16158+3110751+5910751+5916100(Top 57%)10412(Top 65%)10412(Top 1629%)
21M21.00 mi1.00 mi16300-14210784-3310784-3318958(Top 67%)11592(Top 72%)11592(Top 1814%)
35K21.75 mi0.75 mi16347-4710792-810792-818308(Top 64%)11178(Top 69%)11178(Top 1749%)
23M23.00 mi1.25 mi16779-43210935-14310935-14321336(Top 75%)12561(Top 78%)12561(Top 1966%)
24M24.00 mi1.00 mi16646+13310861+7410861+7414290(Top 50%)9289(Top 58%)9289(Top 1454%)
40K24.85 mi0.85 mi16629+1710815+4610815+4616555(Top 58%)10176(Top 63%)10176(Top 1592%)
25.2M25.20 mi0.35 mi16729-10010840-2510840-2520490(Top 72%)12023(Top 75%)12023(Top 1882%)
Finish26.22 mi1.02 mi16909-18010894-5410894-5419963(Top 70%)11784(Top 73%)11784(Top 1844%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 58%
×21story building
+97ft-345ft

Overall

16495

Males

11013

M65-69

11013

5K→10K

3.1 - 6.2 mi

Top 60%
×5story building
+79ft-138ft

Overall

17144

Males

11311

M65-69

11311

10K→15K

6.2 - 9.3 mi

Top 58%
×3story building
+67ft-78ft

Overall

16495

Males

11013

M65-69

11013

15K→20K

9.3 - 12.4 mi

Top 59%
×5story building
+106ft-86ft

Overall

16692

Males

11046

M65-69

11046

20K→Half

12.4 - 13.1 mi

Top 57%
×2story building
+19ft-37ft

Overall

16165

Males

10838

M65-69

10838

Half→25K

13.1 - 15.5 mi

Top 57%
×4story building
+66ft-88ft

Overall

16243

Males

10753

M65-69

10753

25K→30K

15.5 - 18.6 mi

Top 54%
×9story building
+181ft-148ft

Overall

15282

Males

10180

M65-69

10180

30K→20M

18.6 - 20.0 mi

Top 57%
×5story building
+64ft-50ft

Overall

16100

Males

10412

M65-69

10412

20M→21M

20.0 - 21.0 mi

Top 67%
×8story building
+106ft-24ft

Overall

18958

Males

11592

M65-69

11592

21M→35K

21.0 - 21.8 mi

Top 64%
×7story building
+17ft-86ft

Overall

18308

Males

11178

M65-69

11178

35K→23M

21.8 - 23.0 mi

Top 75%
×5story building
+23ft-63ft

Overall

21336

Males

12561

M65-69

12561

23M→24M

23.0 - 24.0 mi

Top 50%
×6story building
+12ft-82ft

Overall

14290

Males

9289

M65-69

9289

24M→40K

24.0 - 24.9 mi

Top 58%
×1story
+6ft-20ft

Overall

16555

Males

10176

M65-69

10176

40K→25.2M

24.9 - 25.2 mi

Top 72%
×1story
+13ft-16ft

Overall

20490

Males

12023

M65-69

12023

25.2M→Finish

25.2 - 26.2 mi

Top 70%
×2story building
+22ft-21ft

Overall

19963

Males

11784

M65-69

11784

Passing Analysis

Category:
Athletes Passed
1632
Passed By
2898
Net Change
-1266
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#15643
5K → 10K91921-830#15643#16473
10K → 15K212208+4#16473#16469
15K → 20K196248-52#16469#16521
20K → Half4332+11#16521#16510
Half → 25K177116+61#16510#16449
25K → 30K365105+260#16449#16189
30K → 20M13099+31#16189#16158
20M → 21M57199-142#16158#16300
21M → 35K5198-47#16300#16347
35K → 23M32464-432#16347#16779
23M → 24M15320+133#16779#16646
24M → 40K8366+17#16646#16629
40K → 25.2M8108-100#16629#16729
25.2M → Finish34214-180#16729#16909
TOTALS16322898-1266
📊

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