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BOSTON MARATHON 2023

Dave Kotlarz

Bib: 9917•M

NE

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 36%
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Top 39%
Division (M45-49)
#0 / 2252
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
24:41
Rank: #13605
Start → 5K
24:41 | 7:57/mi
10K· 6.21 mi
48:11
Rank: #12301 (+1304)
5K → 10K
23:30 | 7:34/mi
15K· 9.32 mi
1:11:51
Rank: #11856 (+445)
10K → 15K
23:40 | 7:37/mi
20K· 12.43 mi
1:35:36
Rank: #11464 (+392)
15K → 20K
23:45 | 7:39/mi
Half· 13.11 mi
1:40:45
Rank: #11407 (+57)
20K → Half
5:09 | 7:33/mi
25K· 15.53 mi
1:59:11
Rank: #11070 (+337)
Half → 25K
18:26 | 7:36/mi
30K· 18.64 mi
2:23:04
Rank: #10566 (+504)
25K → 30K
23:53 | 7:41/mi
20M
2:33:41
Rank: #10427 (+139)
30K → 20M
10:37 | 7:49/mi
21M
2:41:59
Rank: #10331 (+96)
20M → 21M
8:18 | 8:18/mi
35K· 21.75 mi
2:47:37
Rank: #10253 (+78)
21M → 35K
5:38 | 7:32/mi
23M
2:57:16
Rank: #10060 (+193)
35K → 23M
9:39 | 7:42/mi
24M
3:04:39
Rank: #9878 (+182)
23M → 24M
7:23 | 7:23/mi
40K· 24.85 mi
3:11:01
Rank: #9711 (+167)
24M → 40K
6:22 | 7:27/mi
25.2M
3:13:53
Rank: #9663 (+48)
40K → 25.2M
2:52 | 8:19/mi
Finish· 26.22 mi
3:21:28
Rank: #9578 (+85)
25.2M → Finish
7:35 | 7:26/mi

The Course

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Half Splits

1st Half· via Half⚖️ Balanced
Distance13.11 mi
Time1:40:45
Pace7:41 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:40:43
Pace7:41 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:16:2424:417:5724:41
7:57
-
10K
6.21 mi11:39:5448:117:4523:30
7:34
-0:23
15K
9.32 mi12:03:341:11:517:4323:40
7:37
+0:03
20K
12.43 mi12:27:191:35:367:4223:45
7:39
+0:02
Half
13.11 mi12:32:281:40:457:415:09
7:33
-0:06
25K
15.53 mi12:50:541:59:117:4018:26
7:36
+0:03
30K
18.64 mi13:14:472:23:047:4023:53
7:41
+0:05
20M
20.00 mi13:25:242:33:417:4110:37
7:49
+0:08
21M
21.00 mi13:33:422:41:597:438:18
8:18
+0:29
35K
21.75 mi13:39:202:47:377:425:38
7:32
-0:46
23M
23.00 mi13:48:592:57:167:429:39
7:42
+0:10
24M
24.00 mi13:56:223:04:397:427:23
7:23
-0:19
40K
24.85 mi14:02:443:11:017:416:22
7:27
+0:04
25.2M
25.20 mi14:05:363:13:537:422:52
8:19
+0:52
Finish
26.22 mi14:13:113:21:287:417:35
7:26
-0:53

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

7:23 /mi

Average Pace

7:41 /mi

Slowest Pace

8:19 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:10:18

94% of race

Time at Steady Pace

11:10

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:41 /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 mi11:16:2424:417:5724:41
7:57
#13605
10K
6.21 mi11:39:5448:117:4523:30
7:34
#12301
15K
9.32 mi12:03:341:11:517:4323:40
7:37
#11856
20K
12.43 mi12:27:191:35:367:4223:45
7:39
#11464
Half
13.11 mi12:32:281:40:457:415:09
7:33
#11407
25K
15.53 mi12:50:541:59:117:4018:26
7:36
#11070
30K
18.64 mi13:14:472:23:047:4023:53
7:41
#10566
20M
20.00 mi13:25:242:33:417:4110:37
7:49
#10427
21M
21.00 mi13:33:422:41:597:438:18
8:18
#10331
35K
21.75 mi13:39:202:47:377:425:38
7:32
#10253
23M
23.00 mi13:48:592:57:167:429:39
7:42
#10060
24M
24.00 mi13:56:223:04:397:427:23
7:23
#9878
40K
24.85 mi14:02:443:11:017:416:22
7:27
#9711
25.2M
25.20 mi14:05:363:13:537:422:52
8:19
#9663
Finish
26.22 mi14:13:113:21:287:417:35
7:26
#9578
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi136059800980011144(Top 42%)8697(Top 57%)8697(Top 386%)
10K6.21 mi3.10 mi12301+13049245+5559245+55510970(Top 41%)8659(Top 57%)8659(Top 385%)
15K9.32 mi3.11 mi11856+4459027+2189027+21811144(Top 42%)8697(Top 57%)8697(Top 386%)
20K12.43 mi3.11 mi11464+3928851+1768851+17610446(Top 39%)8310(Top 55%)8310(Top 369%)
Half13.11 mi0.68 mi11407+578820+318820+3110537(Top 40%)8359(Top 55%)8359(Top 371%)
25K15.53 mi2.42 mi11070+3378663+1578663+1579551(Top 36%)7737(Top 51%)7737(Top 344%)
30K18.64 mi3.11 mi10566+5048363+3008363+3008544(Top 32%)7012(Top 46%)7012(Top 311%)
20M20.00 mi1.36 mi10427+1398279+848279+848950(Top 34%)7164(Top 47%)7164(Top 318%)
21M21.00 mi1.00 mi10331+968205+748205+749220(Top 35%)7192(Top 47%)7192(Top 319%)
35K21.75 mi0.75 mi10253+788149+568149+568714(Top 33%)6931(Top 46%)6931(Top 308%)
23M23.00 mi1.25 mi10060+1938024+1258024+1257765(Top 29%)6290(Top 41%)6290(Top 279%)
24M24.00 mi1.00 mi9878+1827892+1327892+1326940(Top 26%)5693(Top 38%)5693(Top 253%)
40K24.85 mi0.85 mi9711+1677783+1097783+1096375(Top 24%)5274(Top 35%)5274(Top 234%)
25.2M25.20 mi0.35 mi9663+487735+487735+488355(Top 31%)6387(Top 42%)6387(Top 284%)
Finish26.22 mi1.02 mi9578+857660+757660+758076(Top 30%)6212(Top 41%)6212(Top 276%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 42%
×21stories
+97ft-345ft

Overall

11144

Males

8697

M45-49

8697

5K→10K

3.1 - 6.2 mi

Top 41%
×5stories
+79ft-138ft

Overall

10970

Males

8659

M45-49

8659

10K→15K

6.2 - 9.3 mi

Top 42%
×3stories
+67ft-78ft

Overall

11144

Males

8697

M45-49

8697

15K→20K

9.3 - 12.4 mi

Top 39%
×5stories
+106ft-86ft

Overall

10446

Males

8310

M45-49

8310

20K→Half

12.4 - 13.1 mi

Top 40%
×2stories
+19ft-37ft

Overall

10537

Males

8359

M45-49

8359

Half→25K

13.1 - 15.5 mi

Top 36%
×4stories
+66ft-88ft

Overall

9551

Males

7737

M45-49

7737

25K→30K

15.5 - 18.6 mi

Top 32%
×9stories
+181ft-148ft

Overall

8544

Males

7012

M45-49

7012

30K→20M

18.6 - 20.0 mi

Top 34%
×5stories
+64ft-50ft

Overall

8950

Males

7164

M45-49

7164

20M→21M

20.0 - 21.0 mi

Top 35%
×8stories
+106ft-24ft

Overall

9220

Males

7192

M45-49

7192

21M→35K

21.0 - 21.8 mi

Top 33%
×7stories
+17ft-86ft

Overall

8714

Males

6931

M45-49

6931

35K→23M

21.8 - 23.0 mi

Top 29%
×5stories
+23ft-63ft

Overall

7765

Males

6290

M45-49

6290

23M→24M

23.0 - 24.0 mi

Top 26%
×6stories
+12ft-82ft

Overall

6940

Males

5693

M45-49

5693

24M→40K

24.0 - 24.9 mi

Top 24%
×1story
+6ft-20ft

Overall

6375

Males

5274

M45-49

5274

40K→25.2M

24.9 - 25.2 mi

Top 31%
×1story
+13ft-16ft

Overall

8355

Males

6387

M45-49

6387

25.2M→Finish

25.2 - 26.2 mi

Top 30%
×2stories
+22ft-21ft

Overall

8076

Males

6212

M45-49

6212

Passing Analysis

Category:
Athletes Passed
4304*
Passed By
277
Net Change
+4027
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#13605
5K → 10K134440+1304#13605#12301
10K → 15K49348+445#12301#11856
15K → 20K42129+392#11856#11464
20K → Half658+57#11464#11407
Half → 25K3458+337#11407#11070
25K → 30K51612+504#11070#10566
30K → 20M154*15+139#10566#10427
20M → 21M13438+96#10427#10331
21M → 35K9214+78#10331#10253
35K → 23M1985+193#10253#10060
23M → 24M19210+182#10060#9878
24M → 40K174*7+167#9878#9711
40K → 25.2M6214+48#9711#9663
25.2M → Finish11429+85#9663#9578
TOTALS4304*277+4027

* 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