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BOSTON MARATHON 2023

Michael Ko

Bib: 5821•M

IL

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 19%
Gender (Male)
#0 / 15176
Top 31%
Masters (Masters Men)
#0 / 9891
Top 16%
Division (M40-44)
#0 / 2241
Top 39%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:52
Rank: #3821
Start → 5K
20:52 | 6:43/mi
10K· 6.21 mi
41:39
Rank: #4014 (-193)
5K → 10K
20:47 | 6:41/mi
15K· 9.32 mi
1:02:23
Rank: #3958 (+56)
10K → 15K
20:44 | 6:40/mi
20K· 12.43 mi
1:23:21
Rank: #3936 (+22)
15K → 20K
20:58 | 6:45/mi
Half· 13.11 mi
1:27:58
Rank: #3984 (-48)
20K → Half
4:37 | 6:46/mi
25K· 15.53 mi
1:44:29
Rank: #4025 (-41)
Half → 25K
16:31 | 6:49/mi
30K· 18.64 mi
2:06:29
Rank: #4167 (-142)
25K → 30K
22:00 | 7:05/mi
20M
2:16:04
Rank: #4189 (-22)
30K → 20M
9:35 | 7:03/mi
21M
2:23:50
Rank: #4306 (-117)
20M → 21M
7:46 | 7:46/mi
35K· 21.75 mi
2:29:00
Rank: #4324 (-18)
21M → 35K
5:10 | 6:54/mi
23M
2:38:11
Rank: #4426 (-102)
35K → 23M
9:11 | 7:20/mi
24M
2:45:30
Rank: #4530 (-104)
23M → 24M
7:19 | 7:19/mi
40K· 24.85 mi
2:52:18
Rank: #4675 (-145)
24M → 40K
6:48 | 7:57/mi
25.2M
2:55:24
Rank: #4761 (-86)
40K → 25.2M
3:06 | 8:59/mi
Finish· 26.22 mi
3:04:00
Rank: #5044 (-283)
25.2M → Finish
8:36 | 8:26/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:27:58
Pace6:43 /mi
2nd Half
Distance13.11 mi
Time1:36:02
Pace7:20 /mi
📊Positive Split: 9.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:23:3220:526:4320:52
6:43
-
10K
6.21 mi10:44:1941:396:4220:47
6:41
-0:02
15K
9.32 mi11:05:031:02:236:4220:44
6:40
-0:01
20K
12.43 mi11:26:011:23:216:4220:58
6:45
+0:05
Half
13.11 mi11:30:381:27:586:434:37
6:46
+0:01
25K
15.53 mi11:47:091:44:296:4416:31
6:49
+0:03
30K
18.64 mi12:09:092:06:296:4722:00
7:05
+0:16
20M
20.00 mi12:18:442:16:046:489:35
7:03
-0:02
21M
21.00 mi12:26:302:23:506:517:46
7:46
+0:43
35K
21.75 mi12:31:402:29:006:515:10
6:54
-0:52
23M
23.00 mi12:40:512:38:116:539:11
7:20
+0:26
24M
24.00 mi12:48:102:45:306:547:19
7:19
-0:01
40K
24.85 mi12:54:582:52:186:566:48
7:57
+0:38
25.2M
25.20 mi12:58:042:55:246:583:06
8:59
+1:02
Finish
26.22 mi13:06:403:04:007:018:36
8:26
-0:33

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

6:40 /mi

Average Pace

7:01 /mi

Slowest Pace

8:59 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

41:31

23% of race

Time at Steady Pace

1:56:13

63% of race

Time at Slower Pace

26:16

14% of race

Average Pace: 7:01 /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 mi10:23:3220:526:4320:52
6:43
#3821
10K
6.21 mi10:44:1941:396:4220:47
6:41
#4014
15K
9.32 mi11:05:031:02:236:4220:44
6:40
#3958
20K
12.43 mi11:26:011:23:216:4220:58
6:45
#3936
Half
13.11 mi11:30:381:27:586:434:37
6:46
#3984
25K
15.53 mi11:47:091:44:296:4416:31
6:49
#4025
30K
18.64 mi12:09:092:06:296:4722:00
7:05
#4167
20M
20.00 mi12:18:442:16:046:489:35
7:03
#4189
21M
21.00 mi12:26:302:23:506:517:46
7:46
#4306
35K
21.75 mi12:31:402:29:006:515:10
6:54
#4324
23M
23.00 mi12:40:512:38:116:539:11
7:20
#4426
24M
24.00 mi12:48:102:45:306:547:19
7:19
#4530
40K
24.85 mi12:54:582:52:186:566:48
7:57
#4675
25.2M
25.20 mi12:58:042:55:246:583:06
8:59
#4761
Finish
26.22 mi13:06:403:04:007:018:36
8:26
#5044
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi3821359235923883(Top 15%)3651(Top 24%)3651(Top 163%)
10K6.21 mi3.10 mi4014-1933775-1833775-1834243(Top 16%)3976(Top 26%)3976(Top 177%)
15K9.32 mi3.11 mi3958+563727+483727+483883(Top 15%)3651(Top 24%)3651(Top 163%)
20K12.43 mi3.11 mi3936+223705+223705+223969(Top 15%)3735(Top 25%)3735(Top 167%)
Half13.11 mi0.68 mi3984-483747-423747-424992(Top 19%)4624(Top 30%)4624(Top 206%)
25K15.53 mi2.42 mi4025-413787-403787-404269(Top 16%)3994(Top 26%)3994(Top 178%)
30K18.64 mi3.11 mi4167-1423917-1303917-1304829(Top 18%)4451(Top 29%)4451(Top 199%)
20M20.00 mi1.36 mi4189-223930-133930-134352(Top 16%)4012(Top 26%)4012(Top 179%)
21M21.00 mi1.00 mi4306-1174026-964026-965966(Top 22%)5164(Top 34%)5164(Top 230%)
35K21.75 mi0.75 mi4324-184040-144040-144809(Top 18%)4345(Top 29%)4345(Top 194%)
23M23.00 mi1.25 mi4426-1024132-924132-925479(Top 21%)4816(Top 32%)4816(Top 215%)
24M24.00 mi1.00 mi4530-1044223-914223-916440(Top 24%)5370(Top 35%)5370(Top 240%)
40K24.85 mi0.85 mi4675-1454339-1164339-1169674(Top 36%)7152(Top 47%)7152(Top 319%)
25.2M25.20 mi0.35 mi4761-864404-654404-6512320(Top 46%)8383(Top 55%)8383(Top 374%)
Finish26.22 mi1.02 mi5044-2834635-2314635-23114947(Top 56%)9689(Top 64%)9689(Top 432%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 15%
×21stories
+97ft-345ft

Overall

3883

Males

3651

M40-44

3651

5K→10K

3.1 - 6.2 mi

Top 16%
×5stories
+79ft-138ft

Overall

4243

Males

3976

M40-44

3976

10K→15K

6.2 - 9.3 mi

Top 15%
×3stories
+67ft-78ft

Overall

3883

Males

3651

M40-44

3651

15K→20K

9.3 - 12.4 mi

Top 15%
×5stories
+106ft-86ft

Overall

3969

Males

3735

M40-44

3735

20K→Half

12.4 - 13.1 mi

Top 19%
×2stories
+19ft-37ft

Overall

4992

Males

4624

M40-44

4624

Half→25K

13.1 - 15.5 mi

Top 16%
×4stories
+66ft-88ft

Overall

4269

Males

3994

M40-44

3994

25K→30K

15.5 - 18.6 mi

Top 18%
×9stories
+181ft-148ft

Overall

4829

Males

4451

M40-44

4451

30K→20M

18.6 - 20.0 mi

Top 16%
×5stories
+64ft-50ft

Overall

4352

Males

4012

M40-44

4012

20M→21M

20.0 - 21.0 mi

Top 22%
×8stories
+106ft-24ft

Overall

5966

Males

5164

M40-44

5164

21M→35K

21.0 - 21.8 mi

Top 18%
×7stories
+17ft-86ft

Overall

4809

Males

4345

M40-44

4345

35K→23M

21.8 - 23.0 mi

Top 21%
×5stories
+23ft-63ft

Overall

5479

Males

4816

M40-44

4816

23M→24M

23.0 - 24.0 mi

Top 24%
×6stories
+12ft-82ft

Overall

6440

Males

5370

M40-44

5370

24M→40K

24.0 - 24.9 mi

Top 36%
×1story
+6ft-20ft

Overall

9674

Males

7152

M40-44

7152

40K→25.2M

24.9 - 25.2 mi

Top 46%
×1story
+13ft-16ft

Overall

12320

Males

8383

M40-44

8383

25.2M→Finish

25.2 - 26.2 mi

Top 56%
×2stories
+22ft-21ft

Overall

14947

Males

9689

M40-44

9689

Passing Analysis

Category:
Athletes Passed
776
Passed By
1999
Net Change
-1223
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#3821
5K → 10K140333-193#3821#4014
10K → 15K14488+56#4014#3958
15K → 20K124102+22#3958#3936
20K → Half856-48#3936#3984
Half → 25K67108-41#3984#4025
25K → 30K73215-142#4025#4167
30K → 20M5375-22#4167#4189
20M → 21M40157-117#4189#4306
21M → 35K3452-18#4306#4324
35K → 23M50152-102#4324#4426
23M → 24M17121-104#4426#4530
24M → 40K17162-145#4530#4675
40K → 25.2M490-86#4675#4761
25.2M → Finish5288-283#4761#5044
TOTALS7761999-1223
📊

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