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BOSTON MARATHON 2023

Justin Pfefferle

Bib: 4179•M

QC

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 19%
Gender (Male)
#0 / 15176
Top 30%
Masters (Masters Men)
#0 / 9891
Top 16%
Division (M40-44)
#0 / 2241
Top 38%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
21:01
Rank: #4313
Start → 5K
21:01 | 6:46/mi
10K· 6.21 mi
41:02
Rank: #3188 (+1125)
5K → 10K
20:01 | 6:27/mi
15K· 9.32 mi
1:01:05
Rank: #2851 (+337)
10K → 15K
20:03 | 6:27/mi
20K· 12.43 mi
1:21:33
Rank: #2817 (+34)
15K → 20K
20:28 | 6:35/mi
Half· 13.11 mi
1:26:03
Rank: #2843 (-26)
20K → Half
4:30 | 6:36/mi
25K· 15.53 mi
1:42:24
Rank: #2933 (-90)
Half → 25K
16:21 | 6:45/mi
30K· 18.64 mi
2:04:30
Rank: #3274 (-341)
25K → 30K
22:06 | 7:07/mi
20M
2:14:36
Rank: #3541 (-267)
30K → 20M
10:06 | 7:26/mi
21M
2:22:49
Rank: #3874 (-333)
20M → 21M
8:13 | 8:13/mi
35K· 21.75 mi
2:28:20
Rank: #4055 (-181)
21M → 35K
5:31 | 7:22/mi
23M
2:38:03
Rank: #4367 (-312)
35K → 23M
9:43 | 7:46/mi
24M
2:45:43
Rank: #4587 (-220)
23M → 24M
7:40 | 7:40/mi
40K· 24.85 mi
2:52:21
Rank: #4684 (-97)
24M → 40K
6:38 | 7:45/mi
25.2M
2:55:25
Rank: #4767 (-83)
40K → 25.2M
3:04 | 8:54/mi
Finish· 26.22 mi
3:03:24
Rank: #4929 (-162)
25.2M → Finish
7:59 | 7:50/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:26:03
Pace6:34 /mi
2nd Half
Distance13.11 mi
Time1:37:21
Pace7:26 /mi
📊Positive Split: 13.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:22:5121:016:4621:01
6:46
-
10K
6.21 mi10:42:5241:026:3620:01
6:27
-0:19
15K
9.32 mi11:02:551:01:056:3320:03
6:27
0:00
20K
12.43 mi11:23:231:21:336:3420:28
6:35
+0:08
Half
13.11 mi11:27:531:26:036:344:30
6:36
+0:01
25K
15.53 mi11:44:141:42:246:3616:21
6:45
+0:09
30K
18.64 mi12:06:202:04:306:4122:06
7:07
+0:22
20M
20.00 mi12:16:262:14:366:4410:06
7:26
+0:19
21M
21.00 mi12:24:392:22:496:488:13
8:13
+0:47
35K
21.75 mi12:30:102:28:206:495:31
7:22
-0:51
23M
23.00 mi12:39:532:38:036:529:43
7:46
+0:24
24M
24.00 mi12:47:332:45:436:547:40
7:40
-0:06
40K
24.85 mi12:54:112:52:216:566:38
7:45
+0:05
25.2M
25.20 mi12:57:152:55:256:583:04
8:54
+1:09
Finish
26.22 mi13:05:143:03:247:007:59
7:50
-1:04

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

6:27 /mi

Average Pace

7:00 /mi

Slowest Pace

8:54 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:42:24

56% of race

Time at Steady Pace

45:23

25% of race

Time at Slower Pace

35:37

19% of race

Average Pace: 7:00 /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 mi10:22:5121:016:4621:01
6:46
#4313
10K
6.21 mi10:42:5241:026:3620:01
6:27
#3188
15K
9.32 mi11:02:551:01:056:3320:03
6:27
#2851
20K
12.43 mi11:23:231:21:336:3420:28
6:35
#2817
Half
13.11 mi11:27:531:26:036:344:30
6:36
#2843
25K
15.53 mi11:44:141:42:246:3616:21
6:45
#2933
30K
18.64 mi12:06:202:04:306:4122:06
7:07
#3274
20M
20.00 mi12:16:262:14:366:4410:06
7:26
#3541
21M
21.00 mi12:24:392:22:496:488:13
8:13
#3874
35K
21.75 mi12:30:102:28:206:495:31
7:22
#4055
23M
23.00 mi12:39:532:38:036:529:43
7:46
#4367
24M
24.00 mi12:47:332:45:436:547:40
7:40
#4587
40K
24.85 mi12:54:112:52:216:566:38
7:45
#4684
25.2M
25.20 mi12:57:152:55:256:583:04
8:54
#4767
Finish
26.22 mi13:05:143:03:247:007:59
7:50
#4929
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi4313403140312386(Top 9%)2290(Top 15%)2290(Top 102%)
10K6.21 mi3.10 mi3188+11253026+10053026+10052465(Top 9%)2358(Top 16%)2358(Top 105%)
15K9.32 mi3.11 mi2851+3372722+3042722+3042386(Top 9%)2290(Top 15%)2290(Top 102%)
20K12.43 mi3.11 mi2817+342691+312691+312777(Top 10%)2656(Top 18%)2656(Top 119%)
Half13.11 mi0.68 mi2843-262716-252716-253448(Top 13%)3279(Top 22%)3279(Top 146%)
25K15.53 mi2.42 mi2933-902803-872803-873709(Top 14%)3494(Top 23%)3494(Top 156%)
30K18.64 mi3.11 mi3274-3413112-3093112-3095006(Top 19%)4599(Top 30%)4599(Top 205%)
20M20.00 mi1.36 mi3541-2673349-2373349-2376333(Top 24%)5527(Top 36%)5527(Top 247%)
21M21.00 mi1.00 mi3874-3333647-2983647-2988666(Top 33%)6871(Top 45%)6871(Top 307%)
35K21.75 mi0.75 mi4055-1813805-1583805-1587566(Top 28%)6208(Top 41%)6208(Top 277%)
23M23.00 mi1.25 mi4367-3124082-2774082-2778108(Top 30%)6456(Top 43%)6456(Top 288%)
24M24.00 mi1.00 mi4587-2204271-1894271-1898813(Top 33%)6782(Top 45%)6782(Top 303%)
40K24.85 mi0.85 mi4684-974346-754346-758323(Top 31%)6429(Top 42%)6429(Top 287%)
25.2M25.20 mi0.35 mi4767-834408-624408-6211756(Top 44%)8099(Top 53%)8099(Top 361%)
Finish26.22 mi1.02 mi4929-1624534-1264534-12610881(Top 41%)7718(Top 51%)7718(Top 344%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 9%
×21stories
+97ft-345ft

Overall

2386

Males

2290

M40-44

2290

5K→10K

3.1 - 6.2 mi

Top 9%
×5stories
+79ft-138ft

Overall

2465

Males

2358

M40-44

2358

10K→15K

6.2 - 9.3 mi

Top 9%
×3stories
+67ft-78ft

Overall

2386

Males

2290

M40-44

2290

15K→20K

9.3 - 12.4 mi

Top 10%
×5stories
+106ft-86ft

Overall

2777

Males

2656

M40-44

2656

20K→Half

12.4 - 13.1 mi

Top 13%
×2stories
+19ft-37ft

Overall

3448

Males

3279

M40-44

3279

Half→25K

13.1 - 15.5 mi

Top 14%
×4stories
+66ft-88ft

Overall

3709

Males

3494

M40-44

3494

25K→30K

15.5 - 18.6 mi

Top 19%
×9stories
+181ft-148ft

Overall

5006

Males

4599

M40-44

4599

30K→20M

18.6 - 20.0 mi

Top 24%
×5stories
+64ft-50ft

Overall

6333

Males

5527

M40-44

5527

20M→21M

20.0 - 21.0 mi

Top 33%
×8stories
+106ft-24ft

Overall

8666

Males

6871

M40-44

6871

21M→35K

21.0 - 21.8 mi

Top 28%
×7stories
+17ft-86ft

Overall

7566

Males

6208

M40-44

6208

35K→23M

21.8 - 23.0 mi

Top 30%
×5stories
+23ft-63ft

Overall

8108

Males

6456

M40-44

6456

23M→24M

23.0 - 24.0 mi

Top 33%
×6stories
+12ft-82ft

Overall

8813

Males

6782

M40-44

6782

24M→40K

24.0 - 24.9 mi

Top 31%
×1story
+6ft-20ft

Overall

8323

Males

6429

M40-44

6429

40K→25.2M

24.9 - 25.2 mi

Top 44%
×1story
+13ft-16ft

Overall

11756

Males

8099

M40-44

8099

25.2M→Finish

25.2 - 26.2 mi

Top 41%
×2stories
+22ft-21ft

Overall

10881

Males

7718

M40-44

7718

Passing Analysis

Category:
Athletes Passed
1726
Passed By
2342
Net Change
-616
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#4313
5K → 10K11305+1125#4313#3188
10K → 15K3458+337#3188#2851
15K → 20K8551+34#2851#2817
20K → Half733-26#2817#2843
Half → 25K37127-90#2843#2933
25K → 30K24365-341#2933#3274
30K → 20M14281-267#3274#3541
20M → 21M13346-333#3541#3874
21M → 35K7188-181#3874#4055
35K → 23M17329-312#4055#4367
23M → 24M11231-220#4367#4587
24M → 40K20117-97#4587#4684
40K → 25.2M386-83#4684#4767
25.2M → Finish13175-162#4767#4929
TOTALS17262342-616
📊

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