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BOSTON MARATHON 2023

Jong Ju Jun

Bib: 14609•M

CA

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M50-54)
#0 / 2052
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
26:01
Rank: #16670
Start → 5K
8:22/mi
26:01 split
10K· 6.21 mi
50:49
Rank: #15662 (+1008)
5K → 10K
7:59/mi
24:48 split
15K· 9.32 mi
1:15:44
Rank: #15304 (+358)
10K → 15K
8:01/mi
24:55 split
20K· 12.43 mi
1:40:56
Rank: #15027 (+277)
15K → 20K
8:07/mi
25:12 split
Half· 13.11 mi
1:46:24
Rank: #14992 (+35)
20K → Half
8:01/mi
5:28 split
25K· 15.53 mi
2:06:25
Rank: #14906 (+86)
Half → 25K
8:15/mi
20:01 split
30K· 18.64 mi
2:34:16
Rank: #15296 (-390)
25K → 30K
8:58/mi
27:51 split
20M
2:47:00
Rank: #15556 (-260)
30K → 20M
9:22/mi
12:44 split
21M
2:57:32
Rank: #15887 (-331)
20M → 21M
10:32/mi
10:32 split
35K· 21.75 mi
3:04:32
Rank: #16044 (-157)
21M → 35K
9:21/mi
7:00 split
23M
3:16:00
Rank: #16096 (-52)
35K → 23M
9:09/mi
11:28 split
24M
3:25:04
Rank: #16146 (-50)
23M → 24M
9:04/mi
9:04 split
40K· 24.85 mi
3:33:15
Rank: #16249 (-103)
24M → 40K
9:34/mi
8:11 split
25.2M
3:36:57
Rank: #16343 (-94)
40K → 25.2M
10:44/mi
3:42 split
Finish· 26.22 mi
3:46:40
Rank: #16545 (-202)
25.2M → Finish
9:32/mi
9:43 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:46:24
Pace8:07 /mi
2nd Half
Distance13.11 mi
Time2:00:16
Pace9:10 /mi
📊Positive Split: 13.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:17:4126:018:2226:01
8:22
-
10K
6.21 mi11:42:2950:498:1124:48
7:59
-0:23
15K
9.32 mi12:07:241:15:448:0824:55
8:01
+0:02
20K
12.43 mi12:32:361:40:568:0725:12
8:07
+0:06
Half
13.11 mi12:38:041:46:248:075:28
8:01
-0:06
25K
15.53 mi12:58:052:06:258:0820:01
8:15
+0:14
30K
18.64 mi13:25:562:34:168:1727:51
8:58
+0:43
20M
20.00 mi13:38:402:47:008:2112:44
9:22
+0:24
21M
21.00 mi13:49:122:57:328:2710:32
10:32
+1:10
35K
21.75 mi13:56:123:04:328:297:00
9:21
-1:11
23M
23.00 mi14:07:403:16:008:3111:28
9:09
-0:12
24M
24.00 mi14:16:443:25:048:339:04
9:04
-0:05
40K
24.85 mi14:24:553:33:158:358:11
9:34
+0:30
25.2M
25.20 mi14:28:373:36:578:373:42
10:44
+1:10
Finish
26.22 mi14:38:203:46:408:399:43
9:32
-1:12

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

7:59 /mi

Average Pace

8:39 /mi

Slowest Pace

10:44 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:06:25

56% of race

Time at Steady Pace

1:08:07

30% of race

Time at Slower Pace

32:08

14% of race

Average Pace: 8:39 /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 mi11:17:4126:018:2226:01
8:22
#16670
10K
6.21 mi11:42:2950:498:1124:48
7:59
#15662
15K
9.32 mi12:07:241:15:448:0824:55
8:01
#15304
20K
12.43 mi12:32:361:40:568:0725:12
8:07
#15027
Half
13.11 mi12:38:041:46:248:075:28
8:01
#14992
25K
15.53 mi12:58:052:06:258:0820:01
8:15
#14906
30K
18.64 mi13:25:562:34:168:1727:51
8:58
#15296
20M
20.00 mi13:38:402:47:008:2112:44
9:22
#15556
21M
21.00 mi13:49:122:57:328:2710:32
10:32
#15887
35K
21.75 mi13:56:123:04:328:297:00
9:21
#16044
23M
23.00 mi14:07:403:16:008:3111:28
9:09
#16096
24M
24.00 mi14:16:443:25:048:339:04
9:04
#16146
40K
24.85 mi14:24:553:33:158:358:11
9:34
#16249
25.2M
25.20 mi14:28:373:36:578:373:42
10:44
#16343
Finish
26.22 mi14:38:203:46:408:399:43
9:32
#16545
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi16670109411094114534(Top 55%)10115(Top 67%)10115(Top 493%)
10K6.21 mi3.10 mi15662+100810575+36610575+36614682(Top 55%)10197(Top 67%)10197(Top 497%)
15K9.32 mi3.11 mi15304+35810431+14410431+14414534(Top 55%)10115(Top 67%)10115(Top 493%)
20K12.43 mi3.11 mi15027+27710309+12210309+12214287(Top 54%)9993(Top 66%)9993(Top 487%)
Half13.11 mi0.68 mi14992+3510296+1310296+1314461(Top 54%)10100(Top 67%)10100(Top 492%)
25K15.53 mi2.42 mi14906+8610238+5810238+5814633(Top 55%)10012(Top 66%)10012(Top 488%)
30K18.64 mi3.11 mi15296-39010336-9810336-9816971(Top 64%)10900(Top 72%)10900(Top 531%)
20M20.00 mi1.36 mi15556-26010414-7810414-7818305(Top 69%)11372(Top 75%)11372(Top 554%)
21M21.00 mi1.00 mi15887-33110520-10610520-10619680(Top 74%)11901(Top 78%)11901(Top 580%)
35K21.75 mi0.75 mi16044-15710562-4210562-4219345(Top 73%)11746(Top 77%)11746(Top 572%)
23M23.00 mi1.25 mi16096-5210569-710569-716831(Top 63%)10609(Top 70%)10609(Top 517%)
24M24.00 mi1.00 mi16146-5010585-1610585-1617511(Top 66%)10850(Top 71%)10850(Top 529%)
40K24.85 mi0.85 mi16249-10310604-1910604-1918560(Top 70%)11282(Top 74%)11282(Top 550%)
25.2M25.20 mi0.35 mi16343-9410637-3310637-3319734(Top 74%)11786(Top 78%)11786(Top 574%)
Finish26.22 mi1.02 mi16545-20210717-8010717-8020233(Top 76%)12068(Top 80%)12068(Top 588%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 55%
×21story building
+97ft-345ft

Overall

14534

Males

10115

M50-54

10115

5K→10K

3.1 - 6.2 mi

Top 55%
×5story building
+79ft-138ft

Overall

14682

Males

10197

M50-54

10197

10K→15K

6.2 - 9.3 mi

Top 55%
×3story building
+67ft-78ft

Overall

14534

Males

10115

M50-54

10115

15K→20K

9.3 - 12.4 mi

Top 54%
×5story building
+106ft-86ft

Overall

14287

Males

9993

M50-54

9993

20K→Half

12.4 - 13.1 mi

Top 54%
×2story building
+19ft-37ft

Overall

14461

Males

10100

M50-54

10100

Half→25K

13.1 - 15.5 mi

Top 55%
×4story building
+66ft-88ft

Overall

14633

Males

10012

M50-54

10012

25K→30K

15.5 - 18.6 mi

Top 64%
×9story building
+181ft-148ft

Overall

16971

Males

10900

M50-54

10900

30K→20M

18.6 - 20.0 mi

Top 69%
×5story building
+64ft-50ft

Overall

18305

Males

11372

M50-54

11372

20M→21M

20.0 - 21.0 mi

Top 74%
×8story building
+106ft-24ft

Overall

19680

Males

11901

M50-54

11901

21M→35K

21.0 - 21.8 mi

Top 73%
×7story building
+17ft-86ft

Overall

19345

Males

11746

M50-54

11746

35K→23M

21.8 - 23.0 mi

Top 63%
×5story building
+23ft-63ft

Overall

16831

Males

10609

M50-54

10609

23M→24M

23.0 - 24.0 mi

Top 66%
×6story building
+12ft-82ft

Overall

17511

Males

10850

M50-54

10850

24M→40K

24.0 - 24.9 mi

Top 70%
×1story
+6ft-20ft

Overall

18560

Males

11282

M50-54

11282

40K→25.2M

24.9 - 25.2 mi

Top 74%
×1story
+13ft-16ft

Overall

19734

Males

11786

M50-54

11786

25.2M→Finish

25.2 - 26.2 mi

Top 76%
×2story building
+22ft-21ft

Overall

20233

Males

12068

M50-54

12068

Passing Analysis

Category:
Athletes Passed
2370
Passed By
2245
Net Change
+125
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#16670
5K → 10K107466+1008#16670#15662
10K → 15K41052+358#15662#15304
15K → 20K34265+277#15304#15027
20K → Half5318+35#15027#14992
Half → 25K17387+86#14992#14906
25K → 30K75465-390#14906#15296
30K → 20M27287-260#15296#15556
20M → 21M20351-331#15556#15887
21M → 35K25182-157#15887#16044
35K → 23M63115-52#16044#16096
23M → 24M4797-50#16096#16146
24M → 40K39142-103#16146#16249
40K → 25.2M8102-94#16249#16343
25.2M → Finish14216-202#16343#16545
TOTALS23702245+125
📊

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