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BOSTON MARATHON 2023

John Kim

Bib: 9853•M

WA

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 23%
Gender (Male)
#0 / 15176
Top 37%
Masters (Masters Men)
#0 / 9891
Top 23%
Division (M40-44)
#0 / 2241
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
21:32
Rank: #5802
Start → 5K
21:32 | 6:56/mi
10K· 6.21 mi
42:56
Rank: #5889 (-87)
5K → 10K
21:24 | 6:53/mi
15K· 9.32 mi
1:05:13
Rank: #6494 (-605)
10K → 15K
22:17 | 7:10/mi
20K· 12.43 mi
1:26:42
Rank: #6204 (+290)
15K → 20K
21:29 | 6:55/mi
Half· 13.11 mi
1:31:20
Rank: #6151 (+53)
20K → Half
4:38 | 6:47/mi
25K· 15.53 mi
1:48:16
Rank: #6020 (+131)
Half → 25K
16:56 | 6:59/mi
30K· 18.64 mi
2:10:27
Rank: #5799 (+221)
25K → 30K
22:11 | 7:08/mi
20M
2:21:03
Rank: #5968 (-169)
30K → 20M
10:36 | 7:48/mi
21M
2:29:26
Rank: #6099 (-131)
20M → 21M
8:23 | 8:23/mi
35K· 21.75 mi
2:34:53
Rank: #6096 (+3)
21M → 35K
5:27 | 7:17/mi
23M
2:44:28
Rank: #6109 (-13)
35K → 23M
9:35 | 7:39/mi
24M
2:52:03
Rank: #6127 (-18)
23M → 24M
7:35 | 7:35/mi
40K· 24.85 mi
2:58:42
Rank: #6170 (-43)
24M → 40K
6:39 | 7:47/mi
25.2M
3:01:32
Rank: #6170
40K → 25.2M
2:50 | 8:13/mi
Finish· 26.22 mi
3:09:17
Rank: #6251 (-81)
25.2M → Finish
7:45 | 7:36/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:31:20
Pace6:58 /mi
2nd Half
Distance13.11 mi
Time1:37:57
Pace7:28 /mi
📊Positive Split: 7.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:47:1721:326:5621:32
6:56
-
10K
6.21 mi11:08:4142:566:5521:24
6:53
-0:03
15K
9.32 mi11:30:581:05:137:0022:17
7:10
+0:17
20K
12.43 mi11:52:271:26:426:5921:29
6:55
-0:15
Half
13.11 mi11:57:051:31:206:584:38
6:47
-0:08
25K
15.53 mi12:14:011:48:166:5816:56
6:59
+0:12
30K
18.64 mi12:36:122:10:277:0022:11
7:08
+0:09
20M
20.00 mi12:46:482:21:037:0310:36
7:48
+0:40
21M
21.00 mi12:55:112:29:267:078:23
8:23
+0:35
35K
21.75 mi13:00:382:34:537:075:27
7:17
-1:06
23M
23.00 mi13:10:132:44:287:099:35
7:39
+0:22
24M
24.00 mi13:17:482:52:037:107:35
7:35
-0:04
40K
24.85 mi13:24:272:58:427:116:39
7:47
+0:12
25.2M
25.20 mi13:27:173:01:327:122:50
8:13
+0:26
Finish
26.22 mi13:35:023:09:177:137:45
7:36
-0:37

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

6:47 /mi

Average Pace

7:13 /mi

Slowest Pace

8:23 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:25:59

45% of race

Time at Steady Pace

49:55

26% of race

Time at Slower Pace

53:23

28% of race

Average Pace: 7:13 /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 mi10:47:1721:326:5621:32
6:56
#5802
10K
6.21 mi11:08:4142:566:5521:24
6:53
#5889
15K
9.32 mi11:30:581:05:137:0022:17
7:10
#6494
20K
12.43 mi11:52:271:26:426:5921:29
6:55
#6204
Half
13.11 mi11:57:051:31:206:584:38
6:47
#6151
25K
15.53 mi12:14:011:48:166:5816:56
6:59
#6020
30K
18.64 mi12:36:122:10:277:0022:11
7:08
#5799
20M
20.00 mi12:46:482:21:037:0310:36
7:48
#5968
21M
21.00 mi12:55:112:29:267:078:23
8:23
#6099
35K
21.75 mi13:00:382:34:537:075:27
7:17
#6096
23M
23.00 mi13:10:132:44:287:099:35
7:39
#6109
24M
24.00 mi13:17:482:52:037:107:35
7:35
#6127
40K
24.85 mi13:24:272:58:427:116:39
7:47
#6170
25.2M
25.20 mi13:27:173:01:327:122:50
8:13
#6170
Finish
26.22 mi13:35:023:09:177:137:45
7:36
#6251
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi5802532653267592(Top 29%)6653(Top 44%)6653(Top 297%)
10K6.21 mi3.10 mi5889-875398-725398-726035(Top 23%)5490(Top 36%)5490(Top 245%)
15K9.32 mi3.11 mi6494-6055864-4665864-4667592(Top 29%)6653(Top 44%)6653(Top 297%)
20K12.43 mi3.11 mi6204+2905633+2315633+2315446(Top 20%)5027(Top 33%)5027(Top 224%)
Half13.11 mi0.68 mi6151+535595+385595+385231(Top 20%)4841(Top 32%)4841(Top 216%)
25K15.53 mi2.42 mi6020+1315498+975498+975498(Top 21%)5063(Top 33%)5063(Top 226%)
30K18.64 mi3.11 mi5799+2215310+1885310+1885154(Top 19%)4726(Top 31%)4726(Top 211%)
20M20.00 mi1.36 mi5968-1695428-1185428-1188815(Top 33%)7074(Top 47%)7074(Top 316%)
21M21.00 mi1.00 mi6099-1315514-865514-869707(Top 36%)7439(Top 49%)7439(Top 332%)
35K21.75 mi0.75 mi6096+35508+65508+66994(Top 26%)5879(Top 39%)5879(Top 262%)
23M23.00 mi1.25 mi6109-135505+35505+37426(Top 28%)6067(Top 40%)6067(Top 271%)
24M24.00 mi1.00 mi6127-185508-35508-38236(Top 31%)6441(Top 42%)6441(Top 287%)
40K24.85 mi0.85 mi6170-435527-195527-198475(Top 32%)6527(Top 43%)6527(Top 291%)
25.2M25.20 mi0.35 mi61705522+55522+57700(Top 29%)5976(Top 39%)5976(Top 267%)
Finish26.22 mi1.02 mi6251-815572-505572-509273(Top 35%)6893(Top 45%)6893(Top 308%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 29%
×21stories
+97ft-345ft

Overall

7592

Males

6653

M40-44

6653

5K→10K

3.1 - 6.2 mi

Top 23%
×5stories
+79ft-138ft

Overall

6035

Males

5490

M40-44

5490

10K→15K

6.2 - 9.3 mi

Top 29%
×3stories
+67ft-78ft

Overall

7592

Males

6653

M40-44

6653

15K→20K

9.3 - 12.4 mi

Top 20%
×5stories
+106ft-86ft

Overall

5446

Males

5027

M40-44

5027

20K→Half

12.4 - 13.1 mi

Top 20%
×2stories
+19ft-37ft

Overall

5231

Males

4841

M40-44

4841

Half→25K

13.1 - 15.5 mi

Top 21%
×4stories
+66ft-88ft

Overall

5498

Males

5063

M40-44

5063

25K→30K

15.5 - 18.6 mi

Top 19%
×9stories
+181ft-148ft

Overall

5154

Males

4726

M40-44

4726

30K→20M

18.6 - 20.0 mi

Top 33%
×5stories
+64ft-50ft

Overall

8815

Males

7074

M40-44

7074

20M→21M

20.0 - 21.0 mi

Top 36%
×8stories
+106ft-24ft

Overall

9707

Males

7439

M40-44

7439

21M→35K

21.0 - 21.8 mi

Top 26%
×7stories
+17ft-86ft

Overall

6994

Males

5879

M40-44

5879

35K→23M

21.8 - 23.0 mi

Top 28%
×5stories
+23ft-63ft

Overall

7426

Males

6067

M40-44

6067

23M→24M

23.0 - 24.0 mi

Top 31%
×6stories
+12ft-82ft

Overall

8236

Males

6441

M40-44

6441

24M→40K

24.0 - 24.9 mi

Top 32%
×1story
+6ft-20ft

Overall

8475

Males

6527

M40-44

6527

40K→25.2M

24.9 - 25.2 mi

Top 29%
×1story
+13ft-16ft

Overall

7700

Males

5976

M40-44

5976

25.2M→Finish

25.2 - 26.2 mi

Top 35%
×2stories
+22ft-21ft

Overall

9273

Males

6893

M40-44

6893

Passing Analysis

Category:
Athletes Passed
1200
Passed By
1649
Net Change
-449
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#5802
5K → 10K150237-87#5802#5889
10K → 15K13618-605#5889#6494
15K → 20K2955+290#6494#6204
20K → Half596+53#6204#6151
Half → 25K15322+131#6151#6020
25K → 30K24625+221#6020#5799
30K → 20M25194-169#5799#5968
20M → 21M23154-131#5968#6099
21M → 35K3633+3#6099#6096
35K → 23M6679-13#6096#6109
23M → 24M4866-18#6109#6127
24M → 40K3477-43#6127#6170
40K → 25.2M21210#6170#6170
25.2M → Finish31112-81#6170#6251
TOTALS12001649-449
📊

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