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BOSTON MARATHON 2023

Jeff Kao

Bib: 14376•M

CA

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 37%
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Top 41%
Division (M50-54)
#0 / 2052
Top 40%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
24:50
Rank: #13953
Start → 5K
24:50 | 8:00/mi
10K· 6.21 mi
49:36
Rank: #14258 (-305)
5K → 10K
24:46 | 7:58/mi
15K· 9.32 mi
1:14:51
Rank: #14566 (-308)
10K → 15K
25:15 | 8:08/mi
20K· 12.43 mi
1:40:16
Rank: #14633 (-67)
15K → 20K
25:25 | 8:11/mi
Half· 13.11 mi
1:45:22
Rank: #14381 (+252)
20K → Half
5:06 | 7:29/mi
25K· 15.53 mi
2:04:17
Rank: #13874 (+507)
Half → 25K
18:55 | 7:48/mi
30K· 18.64 mi
2:28:32
Rank: #13046 (+828)
25K → 30K
24:15 | 7:48/mi
20M
2:38:39
Rank: #12481 (+565)
30K → 20M
10:07 | 7:27/mi
21M
2:45:58
Rank: #11888 (+593)
20M → 21M
7:19 | 7:19/mi
35K· 21.75 mi
2:51:01
Rank: #11508 (+380)
21M → 35K
5:03 | 6:45/mi
23M
2:59:50
Rank: #10935 (+573)
35K → 23M
8:49 | 7:03/mi
24M
3:06:52
Rank: #10633 (+302)
23M → 24M
7:02 | 7:02/mi
40K· 24.85 mi
3:12:53
Rank: #10319 (+314)
24M → 40K
6:01 | 7:02/mi
25.2M
3:15:23
Rank: #10151 (+168)
40K → 25.2M
2:30 | 7:15/mi
Finish· 26.22 mi
3:22:16
Rank: #9818 (+333)
25.2M → Finish
6:53 | 6:45/mi

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time1:45:22
Pace8:02 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:36:54
Pace7:24 /mi
📊Negative Split: 8.0% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:56:1324:508:0024:50
8:00
-
10K
6.21 mi11:20:5949:367:5924:46
7:58
-0:02
15K
9.32 mi11:46:141:14:518:0225:15
8:08
+0:10
20K
12.43 mi12:11:391:40:168:0425:25
8:11
+0:03
Half
13.11 mi12:16:451:45:228:025:06
7:29
-0:42
25K
15.53 mi12:35:402:04:178:0018:55
7:48
+0:19
30K
18.64 mi12:59:552:28:327:5824:15
7:48
0:00
20M
20.00 mi13:10:022:38:397:5610:07
7:27
-0:21
21M
21.00 mi13:17:212:45:587:547:19
7:19
-0:08
35K
21.75 mi13:22:242:51:017:525:03
6:45
-0:34
23M
23.00 mi13:31:132:59:507:498:49
7:03
+0:18
24M
24.00 mi13:38:153:06:527:477:02
7:02
-0:01
40K
24.85 mi13:44:163:12:537:466:01
7:02
0:00
25.2M
25.20 mi13:46:463:15:237:452:30
7:15
+0:13
Finish
26.22 mi13:53:393:22:167:436:53
6:45
-0:30

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

6:45 /mi

Average Pace

7:43 /mi

Slowest Pace

8:11 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

33:48

17% of race

Time at Steady Pace

25:02

12% of race

Time at Slower Pace

2:23:26

71% of race

Average Pace: 7:43 /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 mi10:56:1324:508:0024:50
8:00
#13953
10K
6.21 mi11:20:5949:367:5924:46
7:58
#14258
15K
9.32 mi11:46:141:14:518:0225:15
8:08
#14566
20K
12.43 mi12:11:391:40:168:0425:25
8:11
#14633
Half
13.11 mi12:16:451:45:228:025:06
7:29
#14381
25K
15.53 mi12:35:402:04:178:0018:55
7:48
#13874
30K
18.64 mi12:59:552:28:327:5824:15
7:48
#13046
20M
20.00 mi13:10:022:38:397:5610:07
7:27
#12481
21M
21.00 mi13:17:212:45:587:547:19
7:19
#11888
35K
21.75 mi13:22:242:51:017:525:03
6:45
#11508
23M
23.00 mi13:31:132:59:507:498:49
7:03
#10935
24M
24.00 mi13:38:153:06:527:477:02
7:02
#10633
40K
24.85 mi13:44:163:12:537:466:01
7:02
#10319
25.2M
25.20 mi13:46:463:15:237:452:30
7:15
#10151
Finish
26.22 mi13:53:393:22:167:436:53
6:45
#9818
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi139539927992715329(Top 58%)10441(Top 69%)10441(Top 509%)
10K6.21 mi3.10 mi14258-30510034-10710034-10714574(Top 55%)10149(Top 67%)10149(Top 495%)
15K9.32 mi3.11 mi14566-30810155-12110155-12115329(Top 58%)10441(Top 69%)10441(Top 509%)
20K12.43 mi3.11 mi14633-6710162-710162-714817(Top 56%)10198(Top 67%)10198(Top 497%)
Half13.11 mi0.68 mi14381+25210052+11010052+1109979(Top 37%)8089(Top 53%)8089(Top 394%)
25K15.53 mi2.42 mi13874+5079819+2339819+23311087(Top 42%)8542(Top 56%)8542(Top 416%)
30K18.64 mi3.11 mi13046+8289451+3689451+3689396(Top 35%)7498(Top 49%)7498(Top 365%)
20M20.00 mi1.36 mi12481+5659205+2469205+2466448(Top 24%)5617(Top 37%)5617(Top 274%)
21M21.00 mi1.00 mi11888+5938923+2828923+2823729(Top 14%)3460(Top 23%)3460(Top 169%)
35K21.75 mi0.75 mi11508+3808739+1848739+1843922(Top 15%)3616(Top 24%)3616(Top 176%)
23M23.00 mi1.25 mi10935+5738451+2888451+2884011(Top 15%)3692(Top 24%)3692(Top 180%)
24M24.00 mi1.00 mi10633+3028275+1768275+1764852(Top 18%)4321(Top 28%)4321(Top 211%)
40K24.85 mi0.85 mi10319+3148092+1838092+1834063(Top 15%)3645(Top 24%)3645(Top 178%)
25.2M25.20 mi0.35 mi10151+1688000+928000+922793(Top 10%)2579(Top 17%)2579(Top 126%)
Finish26.22 mi1.02 mi9818+3337790+2107790+2103834(Top 14%)3406(Top 22%)3406(Top 166%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 58%
×21stories
+97ft-345ft

Overall

15329

Males

10441

M50-54

10441

5K→10K

3.1 - 6.2 mi

Top 55%
×5stories
+79ft-138ft

Overall

14574

Males

10149

M50-54

10149

10K→15K

6.2 - 9.3 mi

Top 58%
×3stories
+67ft-78ft

Overall

15329

Males

10441

M50-54

10441

15K→20K

9.3 - 12.4 mi

Top 56%
×5stories
+106ft-86ft

Overall

14817

Males

10198

M50-54

10198

20K→Half

12.4 - 13.1 mi

Top 37%
×2stories
+19ft-37ft

Overall

9979

Males

8089

M50-54

8089

Half→25K

13.1 - 15.5 mi

Top 42%
×4stories
+66ft-88ft

Overall

11087

Males

8542

M50-54

8542

25K→30K

15.5 - 18.6 mi

Top 35%
×9stories
+181ft-148ft

Overall

9396

Males

7498

M50-54

7498

30K→20M

18.6 - 20.0 mi

Top 24%
×5stories
+64ft-50ft

Overall

6448

Males

5617

M50-54

5617

20M→21M

20.0 - 21.0 mi

Top 14%
×8stories
+106ft-24ft

Overall

3729

Males

3460

M50-54

3460

21M→35K

21.0 - 21.8 mi

Top 15%
×7stories
+17ft-86ft

Overall

3922

Males

3616

M50-54

3616

35K→23M

21.8 - 23.0 mi

Top 15%
×5stories
+23ft-63ft

Overall

4011

Males

3692

M50-54

3692

23M→24M

23.0 - 24.0 mi

Top 18%
×6stories
+12ft-82ft

Overall

4852

Males

4321

M50-54

4321

24M→40K

24.0 - 24.9 mi

Top 15%
×1story
+6ft-20ft

Overall

4063

Males

3645

M50-54

3645

40K→25.2M

24.9 - 25.2 mi

Top 10%
×1story
+13ft-16ft

Overall

2793

Males

2579

M50-54

2579

25.2M→Finish

25.2 - 26.2 mi

Top 14%
×2stories
+22ft-21ft

Overall

3834

Males

3406

M50-54

3406

Passing Analysis

Category:
Athletes Passed
5243*
Passed By
1108
Net Change
+4135
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#13953
5K → 10K157462-305#13953#14258
10K → 15K99407-308#14258#14566
15K → 20K158225-67#14566#14633
20K → Half2520+252#14633#14381
Half → 25K5147+507#14381#13874
25K → 30K8313+828#13874#13046
30K → 20M5650+565#13046#12481
20M → 21M5930+593#12481#11888
21M → 35K3800+380#11888#11508
35K → 23M5730+573#11508#10935
23M → 24M3053+302#10935#10633
24M → 40K3140+314#10633#10319
40K → 25.2M168*0+168#10319#10151
25.2M → Finish334*1+333#10151#9818
TOTALS5243*1108+4135

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

📊

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