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BOSTON MARATHON 2023

Dennis Mcduffie

Bib: 464•M

CA

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 2%
Gender (Male)
#0 / 15176
Top 2%
Division (M18-39)
#0 / 5285
Top 6%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
17:09
Rank: #143
Start → 5K
17:09 | 5:31/mi
10K· 6.21 mi
34:32
Rank: #152 (-9)
5K → 10K
17:23 | 5:36/mi
15K· 9.32 mi
52:13
Rank: #182 (-30)
10K → 15K
17:41 | 5:42/mi
20K· 12.43 mi
1:10:26
Rank: #222 (-40)
15K → 20K
18:13 | 5:52/mi
Half· 13.11 mi
1:14:25
Rank: #231 (-9)
20K → Half
3:59 | 5:50/mi
25K· 15.53 mi
1:28:55
Rank: #270 (-39)
Half → 25K
14:30 | 5:59/mi
30K· 18.64 mi
1:48:24
Rank: #323 (-53)
25K → 30K
19:29 | 6:16/mi
20M
1:56:55
Rank: #336 (-13)
30K → 20M
8:31 | 6:16/mi
21M
2:03:35
Rank: #351 (-15)
20M → 21M
6:40 | 6:40/mi
35K· 21.75 mi
2:08:06
Rank: #361 (-10)
21M → 35K
4:31 | 6:02/mi
23M
2:15:59
Rank: #368 (-7)
35K → 23M
7:53 | 6:18/mi
24M
2:22:08
Rank: #374 (-6)
23M → 24M
6:09 | 6:09/mi
40K· 24.85 mi
2:27:31
Rank: #377 (-3)
24M → 40K
5:23 | 6:18/mi
25.2M
2:29:56
Rank: #381 (-4)
40K → 25.2M
2:25 | 7:00/mi
Finish· 26.22 mi
2:36:22
Rank: #400 (-19)
25.2M → Finish
6:26 | 6:19/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:14:25
Pace5:41 /mi
2nd Half
Distance13.11 mi
Time1:21:57
Pace6:15 /mi
📊Positive Split: 10.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:17:2117:095:3117:09
5:31
-
10K
6.21 mi10:34:4434:325:3317:23
5:36
+0:05
15K
9.32 mi10:52:2552:135:3617:41
5:42
+0:06
20K
12.43 mi11:10:381:10:265:4018:13
5:52
+0:10
Half
13.11 mi11:14:371:14:255:413:59
5:50
-0:02
25K
15.53 mi11:29:071:28:555:4314:30
5:59
+0:09
30K
18.64 mi11:48:361:48:245:4919:29
6:16
+0:17
20M
20.00 mi11:57:071:56:555:518:31
6:16
0:00
21M
21.00 mi12:03:472:03:355:536:40
6:40
+0:24
35K
21.75 mi12:08:182:08:065:534:31
6:02
-0:38
23M
23.00 mi12:16:112:15:595:557:53
6:18
+0:16
24M
24.00 mi12:22:202:22:085:556:09
6:09
-0:09
40K
24.85 mi12:27:432:27:315:565:23
6:18
+0:09
25.2M
25.20 mi12:30:082:29:565:572:25
7:00
+0:42
Finish
26.22 mi12:36:342:36:225:586:26
6:19
-0:41

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

5:31 /mi

Average Pace

5:58 /mi

Slowest Pace

7:00 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:14:25

48% of race

Time at Steady Pace

1:12:52

47% of race

Time at Slower Pace

9:05

6% of race

Average Pace: 5:58 /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 mi10:17:2117:095:3117:09
5:31
#143
10K
6.21 mi10:34:4434:325:3317:23
5:36
#152
15K
9.32 mi10:52:2552:135:3617:41
5:42
#182
20K
12.43 mi11:10:381:10:265:4018:13
5:52
#222
Half
13.11 mi11:14:371:14:255:413:59
5:50
#231
25K
15.53 mi11:29:071:28:555:4314:30
5:59
#270
30K
18.64 mi11:48:361:48:245:4919:29
6:16
#323
20M
20.00 mi11:57:071:56:555:518:31
6:16
#336
21M
21.00 mi12:03:472:03:355:536:40
6:40
#351
35K
21.75 mi12:08:182:08:065:534:31
6:02
#361
23M
23.00 mi12:16:112:15:595:557:53
6:18
#368
24M
24.00 mi12:22:202:22:085:556:09
6:09
#374
40K
24.85 mi12:27:432:27:315:565:23
6:18
#377
25.2M
25.20 mi12:30:082:29:565:572:25
7:00
#381
Finish
26.22 mi12:36:342:36:225:586:26
6:19
#400
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi143143143240(Top 0.9%)211(Top 1%)211(Top 4%)
10K6.21 mi3.10 mi152-9152-9152-9199(Top 0.7%)172(Top 1%)172(Top 3%)
15K9.32 mi3.11 mi182-30157-5157-5240(Top 0.9%)211(Top 1%)211(Top 4%)
20K12.43 mi3.11 mi222-40195-38195-38381(Top 1%)348(Top 2%)348(Top 7%)
Half13.11 mi0.68 mi231-9204-9204-9438(Top 2%)406(Top 3%)406(Top 8%)
25K15.53 mi2.42 mi270-39242-38242-38518(Top 2%)481(Top 3%)481(Top 9%)
30K18.64 mi3.11 mi323-53291-49291-49837(Top 3%)797(Top 5%)797(Top 15%)
20M20.00 mi1.36 mi336-13304-13304-13779(Top 3%)739(Top 5%)739(Top 14%)
21M21.00 mi1.00 mi351-15319-15319-15994(Top 4%)946(Top 6%)946(Top 18%)
35K21.75 mi0.75 mi361-10329-10329-10746(Top 3%)705(Top 5%)705(Top 13%)
23M23.00 mi1.25 mi368-7337-8337-8811(Top 3%)769(Top 5%)769(Top 15%)
24M24.00 mi1.00 mi374-6342-5342-5858(Top 3%)813(Top 5%)813(Top 15%)
40K24.85 mi0.85 mi377-3345-3345-3863(Top 3%)816(Top 5%)816(Top 15%)
25.2M25.20 mi0.35 mi381-4349-4349-41704(Top 6%)1597(Top 11%)1597(Top 30%)
Finish26.22 mi1.02 mi400-19366-17366-171655(Top 6%)1555(Top 10%)1555(Top 29%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 0.9%
×21stories
+97ft-345ft

Overall

240

Males

211

M18-39

211

5K→10K

3.1 - 6.2 mi

Top 0.7%
×5stories
+79ft-138ft

Overall

199

Males

172

M18-39

172

10K→15K

6.2 - 9.3 mi

Top 0.9%
×3stories
+67ft-78ft

Overall

240

Males

211

M18-39

211

15K→20K

9.3 - 12.4 mi

Top 1%
×5stories
+106ft-86ft

Overall

381

Males

348

M18-39

348

20K→Half

12.4 - 13.1 mi

Top 2%
×2stories
+19ft-37ft

Overall

438

Males

406

M18-39

406

Half→25K

13.1 - 15.5 mi

Top 2%
×4stories
+66ft-88ft

Overall

518

Males

481

M18-39

481

25K→30K

15.5 - 18.6 mi

Top 3%
×9stories
+181ft-148ft

Overall

837

Males

797

M18-39

797

30K→20M

18.6 - 20.0 mi

Top 3%
×5stories
+64ft-50ft

Overall

779

Males

739

M18-39

739

20M→21M

20.0 - 21.0 mi

Top 4%
×8stories
+106ft-24ft

Overall

994

Males

946

M18-39

946

21M→35K

21.0 - 21.8 mi

Top 3%
×7stories
+17ft-86ft

Overall

746

Males

705

M18-39

705

35K→23M

21.8 - 23.0 mi

Top 3%
×5stories
+23ft-63ft

Overall

811

Males

769

M18-39

769

23M→24M

23.0 - 24.0 mi

Top 3%
×6stories
+12ft-82ft

Overall

858

Males

813

M18-39

813

24M→40K

24.0 - 24.9 mi

Top 3%
×1story
+6ft-20ft

Overall

863

Males

816

M18-39

816

40K→25.2M

24.9 - 25.2 mi

Top 6%
×1story
+13ft-16ft

Overall

1704

Males

1597

M18-39

1597

25.2M→Finish

25.2 - 26.2 mi

Top 6%
×2stories
+22ft-21ft

Overall

1655

Males

1555

M18-39

1555

Passing Analysis

Category:
Athletes Passed
45
Passed By
302
Net Change
-257
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#143
5K → 10K110-9#143#152
10K → 15K333-30#152#182
15K → 20K141-40#182#222
20K → Half09-9#222#231
Half → 25K241-39#231#270
25K → 30K356-53#270#323
30K → 20M316-13#323#336
20M → 21M318-15#336#351
21M → 35K111-10#351#361
35K → 23M1017-7#361#368
23M → 24M410-6#368#374
24M → 40K811-3#374#377
40K → 25.2M37-4#377#381
25.2M → Finish322-19#381#400
TOTALS45302-257
📊

Passing Visuals

Category:

📈Position Graph

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🎨Heatmap Timeline

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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