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BOSTON MARATHON 2023

Chunmuk Kim

Bib: 20604•M

AB

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M60-64)
#0 / 1110
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
26:39
Rank: #18083
Start → 5K
26:39 | 8:35/mi
10K· 6.21 mi
52:16
Rank: #17282 (+801)
5K → 10K
25:37 | 8:15/mi
15K· 9.32 mi
1:17:54
Rank: #16903 (+379)
10K → 15K
25:38 | 8:15/mi
20K· 12.43 mi
1:43:41
Rank: #16582 (+321)
15K → 20K
25:47 | 8:18/mi
Half· 13.11 mi
1:49:16
Rank: #16528 (+54)
20K → Half
5:35 | 8:11/mi
25K· 15.53 mi
2:10:11
Rank: #16609 (-81)
Half → 25K
20:55 | 8:38/mi
30K· 18.64 mi
2:40:05
Rank: #17280 (-671)
25K → 30K
29:54 | 9:37/mi
20M
2:52:46
Rank: #17356 (-76)
30K → 20M
12:41 | 9:20/mi
21M
3:03:28
Rank: #17604 (-248)
20M → 21M
10:42 | 10:42/mi
35K· 21.75 mi
3:11:00
Rank: #17839 (-235)
21M → 35K
7:32 | 10:04/mi
23M
3:23:05
Rank: #17941 (-102)
35K → 23M
12:05 | 9:39/mi
24M
3:31:46
Rank: #17856 (+85)
23M → 24M
8:41 | 8:41/mi
40K· 24.85 mi
3:39:11
Rank: #17726 (+130)
24M → 40K
7:25 | 8:40/mi
25.2M
3:42:29
Rank: #17698 (+28)
40K → 25.2M
3:18 | 9:34/mi
Finish· 26.22 mi
3:50:52
Rank: #17539 (+159)
25.2M → Finish
8:23 | 8:14/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:49:16
Pace8:20 /mi
2nd Half
Distance13.11 mi
Time2:01:36
Pace9:17 /mi
📊Positive Split: 11.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:18:3526:398:3526:39
8:35
-
10K
6.21 mi11:44:1252:168:2525:37
8:15
-0:20
15K
9.32 mi12:09:501:17:548:2125:38
8:15
0:00
20K
12.43 mi12:35:371:43:418:2125:47
8:18
+0:03
Half
13.11 mi12:41:121:49:168:205:35
8:11
-0:07
25K
15.53 mi13:02:072:10:118:2320:55
8:38
+0:27
30K
18.64 mi13:32:012:40:058:3529:54
9:37
+0:59
20M
20.00 mi13:44:422:52:468:3812:41
9:20
-0:17
21M
21.00 mi13:55:243:03:288:4410:42
10:42
+1:22
35K
21.75 mi14:02:563:11:008:477:32
10:04
-0:38
23M
23.00 mi14:15:013:23:058:5012:05
9:39
-0:25
24M
24.00 mi14:23:423:31:468:498:41
8:41
-0:58
40K
24.85 mi14:31:073:39:118:497:25
8:40
-0:01
25.2M
25.20 mi14:34:253:42:298:503:18
9:34
+0:54
Finish
26.22 mi14:42:483:50:528:498:23
8:14
-1:20

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

8:11 /mi

Average Pace

8:49 /mi

Slowest Pace

10:42 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:05:13

28% of race

Time at Steady Pace

1:29:27

39% of race

Time at Slower Pace

1:16:12

33% of race

Average Pace: 8:48 /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 mi11:18:3526:398:3526:39
8:35
#18083
10K
6.21 mi11:44:1252:168:2525:37
8:15
#17282
15K
9.32 mi12:09:501:17:548:2125:38
8:15
#16903
20K
12.43 mi12:35:371:43:418:2125:47
8:18
#16582
Half
13.11 mi12:41:121:49:168:205:35
8:11
#16528
25K
15.53 mi13:02:072:10:118:2320:55
8:38
#16609
30K
18.64 mi13:32:012:40:058:3529:54
9:37
#17280
20M
20.00 mi13:44:422:52:468:3812:41
9:20
#17356
21M
21.00 mi13:55:243:03:288:4410:42
10:42
#17604
35K
21.75 mi14:02:563:11:008:477:32
10:04
#17839
23M
23.00 mi14:15:013:23:058:5012:05
9:39
#17941
24M
24.00 mi14:23:423:31:468:498:41
8:41
#17856
40K
24.85 mi14:31:073:39:118:497:25
8:40
#17726
25.2M
25.20 mi14:34:253:42:298:503:18
9:34
#17698
Finish
26.22 mi14:42:483:50:528:498:23
8:14
#17539
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM60-64Seg. OverallSeg. MalesSeg. M60-64
5K3.11 mi3.11 mi18083114551145516226(Top 61%)10783(Top 71%)10783(Top 971%)
10K6.21 mi3.10 mi17282+80111159+29611159+29616554(Top 62%)10923(Top 72%)10923(Top 984%)
15K9.32 mi3.11 mi16903+37911030+12911030+12916226(Top 61%)10783(Top 71%)10783(Top 971%)
20K12.43 mi3.11 mi16582+32110892+13810892+13815596(Top 59%)10487(Top 69%)10487(Top 945%)
Half13.11 mi0.68 mi16528+5410877+1510877+1515653(Top 59%)10561(Top 70%)10561(Top 951%)
25K15.53 mi2.42 mi16609-8110887-1010887-1016961(Top 64%)10958(Top 72%)10958(Top 987%)
30K18.64 mi3.11 mi17280-67111134-24711134-24719871(Top 75%)12154(Top 80%)12154(Top 1095%)
20M20.00 mi1.36 mi17356-7611145-1111145-1118140(Top 68%)11298(Top 74%)11298(Top 1018%)
21M21.00 mi1.00 mi17604-24811223-7811223-7820133(Top 76%)12110(Top 80%)12110(Top 1091%)
35K21.75 mi0.75 mi17839-23511313-9011313-9021453(Top 81%)12680(Top 84%)12680(Top 1142%)
23M23.00 mi1.25 mi17941-10211341-2811341-2818901(Top 71%)11526(Top 76%)11526(Top 1038%)
24M24.00 mi1.00 mi17856+8511296+4511296+4515561(Top 58%)9986(Top 66%)9986(Top 900%)
40K24.85 mi0.85 mi17726+13011237+5911237+5914365(Top 54%)9407(Top 62%)9407(Top 847%)
25.2M25.20 mi0.35 mi17698+2811216+2111216+2115476(Top 58%)9897(Top 65%)9897(Top 892%)
Finish26.22 mi1.02 mi17539+15911136+8011136+8013611(Top 51%)9070(Top 60%)9070(Top 817%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 61%
×21stories
+97ft-345ft

Overall

16226

Males

10783

M60-64

10783

5K→10K

3.1 - 6.2 mi

Top 62%
×5stories
+79ft-138ft

Overall

16554

Males

10923

M60-64

10923

10K→15K

6.2 - 9.3 mi

Top 61%
×3stories
+67ft-78ft

Overall

16226

Males

10783

M60-64

10783

15K→20K

9.3 - 12.4 mi

Top 59%
×5stories
+106ft-86ft

Overall

15596

Males

10487

M60-64

10487

20K→Half

12.4 - 13.1 mi

Top 59%
×2stories
+19ft-37ft

Overall

15653

Males

10561

M60-64

10561

Half→25K

13.1 - 15.5 mi

Top 64%
×4stories
+66ft-88ft

Overall

16961

Males

10958

M60-64

10958

25K→30K

15.5 - 18.6 mi

Top 75%
×9stories
+181ft-148ft

Overall

19871

Males

12154

M60-64

12154

30K→20M

18.6 - 20.0 mi

Top 68%
×5stories
+64ft-50ft

Overall

18140

Males

11298

M60-64

11298

20M→21M

20.0 - 21.0 mi

Top 76%
×8stories
+106ft-24ft

Overall

20133

Males

12110

M60-64

12110

21M→35K

21.0 - 21.8 mi

Top 81%
×7stories
+17ft-86ft

Overall

21453

Males

12680

M60-64

12680

35K→23M

21.8 - 23.0 mi

Top 71%
×5stories
+23ft-63ft

Overall

18901

Males

11526

M60-64

11526

23M→24M

23.0 - 24.0 mi

Top 58%
×6stories
+12ft-82ft

Overall

15561

Males

9986

M60-64

9986

24M→40K

24.0 - 24.9 mi

Top 54%
×1story
+6ft-20ft

Overall

14365

Males

9407

M60-64

9407

40K→25.2M

24.9 - 25.2 mi

Top 58%
×1story
+13ft-16ft

Overall

15476

Males

9897

M60-64

9897

25.2M→Finish

25.2 - 26.2 mi

Top 51%
×2stories
+22ft-21ft

Overall

13611

Males

9070

M60-64

9070

Passing Analysis

Category:
Athletes Passed
2547
Passed By
2003
Net Change
+544
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#18083
5K → 10K904103+801#18083#17282
10K → 15K44162+379#17282#16903
15K → 20K36645+321#16903#16582
20K → Half6814+54#16582#16528
Half → 25K107188-81#16528#16609
25K → 30K54725-671#16609#17280
30K → 20M61137-76#17280#17356
20M → 21M25273-248#17356#17604
21M → 35K16251-235#17604#17839
35K → 23M59161-102#17839#17941
23M → 24M10217+85#17941#17856
24M → 40K1377+130#17856#17726
40K → 25.2M4214+28#17726#17698
25.2M → Finish1656+159#17698#17539
TOTALS25472003+544
📊

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