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BOSTON MARATHON 2023

Dan Louw

Bib: 7459•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 21%
Gender (Male)
#0 / 15176
Top 34%
Masters (Masters Men)
#0 / 9891
Top 20%
Division (M40-44)
#0 / 2241
Top 45%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
22:33
Rank: #7830
Start → 5K
22:33 | 7:15/mi
10K· 6.21 mi
45:00
Rank: #8037 (-207)
5K → 10K
22:27 | 7:14/mi
15K· 9.32 mi
1:07:32
Rank: #8077 (-40)
10K → 15K
22:32 | 7:15/mi
20K· 12.43 mi
1:30:05
Rank: #7876 (+201)
15K → 20K
22:33 | 7:15/mi
Half· 13.11 mi
1:34:53
Rank: #7815 (+61)
20K → Half
4:48 | 7:02/mi
25K· 15.53 mi
1:52:21
Rank: #7596 (+219)
Half → 25K
17:28 | 7:12/mi
30K· 18.64 mi
2:15:09
Rank: #7289 (+307)
25K → 30K
22:48 | 7:20/mi
20M
2:24:56
Rank: #7096 (+193)
30K → 20M
9:47 | 7:12/mi
21M
2:32:17
Rank: #6884 (+212)
20M → 21M
7:21 | 7:21/mi
35K· 21.75 mi
2:37:17
Rank: #6734 (+150)
21M → 35K
5:00 | 6:41/mi
23M
2:45:41
Rank: #6426 (+308)
35K → 23M
8:24 | 6:43/mi
24M
2:52:15
Rank: #6171 (+255)
23M → 24M
6:34 | 6:34/mi
40K· 24.85 mi
2:57:56
Rank: #5983 (+188)
24M → 40K
5:41 | 6:39/mi
25.2M
3:00:20
Rank: #5887 (+96)
40K → 25.2M
2:24 | 6:58/mi
Finish· 26.22 mi
3:06:50
Rank: #5657 (+230)
25.2M → Finish
6:30 | 6:23/mi

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time1:34:53
Pace7:14 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:31:57
Pace7:01 /mi
📊Negative Split: 3.1% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:27:0122:337:1522:33
7:15
-
10K
6.21 mi10:49:2845:007:1522:27
7:14
-0:01
15K
9.32 mi11:12:001:07:327:1522:32
7:15
+0:01
20K
12.43 mi11:34:331:30:057:1522:33
7:15
0:00
Half
13.11 mi11:39:211:34:537:144:48
7:02
-0:13
25K
15.53 mi11:56:491:52:217:1417:28
7:12
+0:10
30K
18.64 mi12:19:372:15:097:1522:48
7:20
+0:08
20M
20.00 mi12:29:242:24:567:159:47
7:12
-0:08
21M
21.00 mi12:36:452:32:177:157:21
7:21
+0:09
35K
21.75 mi12:41:452:37:177:145:00
6:41
-0:40
23M
23.00 mi12:50:092:45:417:128:24
6:43
+0:02
24M
24.00 mi12:56:432:52:157:116:34
6:34
-0:09
40K
24.85 mi13:02:242:57:567:105:41
6:39
+0:05
25.2M
25.20 mi13:04:483:00:207:092:24
6:58
+0:19
Finish
26.22 mi13:11:183:06:507:086:30
6:23
-0:35

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

6:23 /mi

Average Pace

7:08 /mi

Slowest Pace

7:21 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

34:33

18% of race

Time at Steady Pace

2:32:17

82% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:08 /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 mi10:27:0122:337:1522:33
7:15
#7830
10K
6.21 mi10:49:2845:007:1522:27
7:14
#8037
15K
9.32 mi11:12:001:07:327:1522:32
7:15
#8077
20K
12.43 mi11:34:331:30:057:1522:33
7:15
#7876
Half
13.11 mi11:39:211:34:537:144:48
7:02
#7815
25K
15.53 mi11:56:491:52:217:1417:28
7:12
#7596
30K
18.64 mi12:19:372:15:097:1522:48
7:20
#7289
20M
20.00 mi12:29:242:24:567:159:47
7:12
#7096
21M
21.00 mi12:36:452:32:177:157:21
7:21
#6884
35K
21.75 mi12:41:452:37:177:145:00
6:41
#6734
23M
23.00 mi12:50:092:45:417:128:24
6:43
#6426
24M
24.00 mi12:56:432:52:157:116:34
6:34
#6171
40K
24.85 mi13:02:242:57:567:105:41
6:39
#5983
25.2M
25.20 mi13:04:483:00:207:092:24
6:58
#5887
Finish
26.22 mi13:11:183:06:507:086:30
6:23
#5657
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi7830685668568147(Top 31%)7014(Top 46%)7014(Top 313%)
10K6.21 mi3.10 mi8037-2076981-1256981-1258280(Top 31%)7128(Top 47%)7128(Top 318%)
15K9.32 mi3.11 mi8077-407001-207001-208147(Top 31%)7014(Top 46%)7014(Top 313%)
20K12.43 mi3.11 mi7876+2016860+1416860+1417473(Top 28%)6538(Top 43%)6538(Top 292%)
Half13.11 mi0.68 mi7815+616815+456815+456688(Top 25%)5995(Top 40%)5995(Top 268%)
25K15.53 mi2.42 mi7596+2196656+1596656+1596679(Top 25%)5912(Top 39%)5912(Top 264%)
30K18.64 mi3.11 mi7289+3076419+2376419+2376237(Top 23%)5539(Top 36%)5539(Top 247%)
20M20.00 mi1.36 mi7096+1936277+1426277+1425110(Top 19%)4632(Top 31%)4632(Top 207%)
21M21.00 mi1.00 mi6884+2126111+1666111+1663901(Top 15%)3609(Top 24%)3609(Top 161%)
35K21.75 mi0.75 mi6734+1505986+1255986+1253509(Top 13%)3261(Top 21%)3261(Top 146%)
23M23.00 mi1.25 mi6426+3085740+2465740+2462230(Top 8%)2103(Top 14%)2103(Top 94%)
24M24.00 mi1.00 mi6171+2555538+2025538+2022422(Top 9%)2265(Top 15%)2265(Top 101%)
40K24.85 mi0.85 mi5983+1885384+1545384+1542135(Top 8%)1999(Top 13%)1999(Top 89%)
25.2M25.20 mi0.35 mi5887+965306+785306+781682(Top 6%)1588(Top 10%)1588(Top 71%)
Finish26.22 mi1.02 mi5657+2305118+1885118+1881954(Top 7%)1825(Top 12%)1825(Top 81%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 31%
×21stories
+97ft-345ft

Overall

8147

Males

7014

M40-44

7014

5K→10K

3.1 - 6.2 mi

Top 31%
×5stories
+79ft-138ft

Overall

8280

Males

7128

M40-44

7128

10K→15K

6.2 - 9.3 mi

Top 31%
×3stories
+67ft-78ft

Overall

8147

Males

7014

M40-44

7014

15K→20K

9.3 - 12.4 mi

Top 28%
×5stories
+106ft-86ft

Overall

7473

Males

6538

M40-44

6538

20K→Half

12.4 - 13.1 mi

Top 25%
×2stories
+19ft-37ft

Overall

6688

Males

5995

M40-44

5995

Half→25K

13.1 - 15.5 mi

Top 25%
×4stories
+66ft-88ft

Overall

6679

Males

5912

M40-44

5912

25K→30K

15.5 - 18.6 mi

Top 23%
×9stories
+181ft-148ft

Overall

6237

Males

5539

M40-44

5539

30K→20M

18.6 - 20.0 mi

Top 19%
×5stories
+64ft-50ft

Overall

5110

Males

4632

M40-44

4632

20M→21M

20.0 - 21.0 mi

Top 15%
×8stories
+106ft-24ft

Overall

3901

Males

3609

M40-44

3609

21M→35K

21.0 - 21.8 mi

Top 13%
×7stories
+17ft-86ft

Overall

3509

Males

3261

M40-44

3261

35K→23M

21.8 - 23.0 mi

Top 8%
×5stories
+23ft-63ft

Overall

2230

Males

2103

M40-44

2103

23M→24M

23.0 - 24.0 mi

Top 9%
×6stories
+12ft-82ft

Overall

2422

Males

2265

M40-44

2265

24M→40K

24.0 - 24.9 mi

Top 8%
×1story
+6ft-20ft

Overall

2135

Males

1999

M40-44

1999

40K→25.2M

24.9 - 25.2 mi

Top 6%
×1story
+13ft-16ft

Overall

1682

Males

1588

M40-44

1588

25.2M→Finish

25.2 - 26.2 mi

Top 7%
×2stories
+22ft-21ft

Overall

1954

Males

1825

M40-44

1825

Passing Analysis

Category:
Athletes Passed
2731
Passed By
558
Net Change
+2173
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#7830
5K → 10K133340-207#7830#8037
10K → 15K116156-40#8037#8077
15K → 20K22928+201#8077#7876
20K → Half654+61#7876#7815
Half → 25K22910+219#7815#7596
25K → 30K32417+307#7596#7289
30K → 20M1930+193#7289#7096
20M → 21M2131+212#7096#6884
21M → 35K1500+150#6884#6734
35K → 23M3080+308#6734#6426
23M → 24M2550+255#6426#6171
24M → 40K1880+188#6171#5983
40K → 25.2M960+96#5983#5887
25.2M → Finish2322+230#5887#5657
TOTALS2731558+2173
📊

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