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BOSTON MARATHON 2023

Robert Sherfy

Bib: 6900•M

VA

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 17%
Gender (Male)
#0 / 15176
Top 28%
Division (M18-39)
#0 / 5285
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
22:11
Rank: #7111
Start → 5K
22:11 | 7:08/mi
10K· 6.21 mi
43:50
Rank: #6819 (+292)
5K → 10K
21:39 | 6:58/mi
15K· 9.32 mi
1:05:20
Rank: #6558 (+261)
10K → 15K
21:30 | 6:55/mi
20K· 12.43 mi
1:26:58
Rank: #6334 (+224)
15K → 20K
21:38 | 6:58/mi
Half· 13.11 mi
1:31:38
Rank: #6297 (+37)
20K → Half
4:40 | 6:50/mi
25K· 15.53 mi
1:48:15
Rank: #6015 (+282)
Half → 25K
16:37 | 6:51/mi
30K· 18.64 mi
2:09:49
Rank: #5606 (+409)
25K → 30K
21:34 | 6:56/mi
20M
2:19:14
Rank: #5428 (+178)
30K → 20M
9:25 | 6:56/mi
21M
2:26:25
Rank: #5228 (+200)
20M → 21M
7:11 | 7:11/mi
35K· 21.75 mi
2:31:31
Rank: #5171 (+57)
21M → 35K
5:06 | 6:49/mi
23M
2:40:12
Rank: #5020 (+151)
35K → 23M
8:41 | 6:56/mi
24M
2:46:59
Rank: #4898 (+122)
23M → 24M
6:47 | 6:47/mi
40K· 24.85 mi
2:52:48
Rank: #4789 (+109)
24M → 40K
5:49 | 6:48/mi
25.2M
2:55:20
Rank: #4745 (+44)
40K → 25.2M
2:32 | 7:21/mi
Finish· 26.22 mi
3:01:45
Rank: #4563 (+182)
25.2M → Finish
6:25 | 6:18/mi

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time1:31:38
Pace6:59 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:30:07
Pace6:52 /mi
📊Negative Split: 1.7% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:25:3322:117:0822:11
7:08
-
10K
6.21 mi10:47:1243:507:0321:39
6:58
-0:10
15K
9.32 mi11:08:421:05:207:0121:30
6:55
-0:03
20K
12.43 mi11:30:201:26:587:0021:38
6:58
+0:03
Half
13.11 mi11:35:001:31:386:594:40
6:50
-0:08
25K
15.53 mi11:51:371:48:156:5816:37
6:51
+0:01
30K
18.64 mi12:13:112:09:496:5821:34
6:56
+0:05
20M
20.00 mi12:22:362:19:146:589:25
6:56
0:00
21M
21.00 mi12:29:472:26:256:587:11
7:11
+0:15
35K
21.75 mi12:34:532:31:316:585:06
6:49
-0:22
23M
23.00 mi12:43:342:40:126:588:41
6:56
+0:07
24M
24.00 mi12:50:212:46:596:576:47
6:47
-0:09
40K
24.85 mi12:56:102:52:486:575:49
6:48
+0:01
25.2M
25.20 mi12:58:422:55:206:572:32
7:21
+0:33
Finish
26.22 mi13:05:073:01:456:566:25
6:18
-1:03

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

6:18 /mi

Average Pace

6:56 /mi

Slowest Pace

7:21 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:06:54

37% of race

Time at Steady Pace

1:54:51

63% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:56 /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 mi10:25:3322:117:0822:11
7:08
#7111
10K
6.21 mi10:47:1243:507:0321:39
6:58
#6819
15K
9.32 mi11:08:421:05:207:0121:30
6:55
#6558
20K
12.43 mi11:30:201:26:587:0021:38
6:58
#6334
Half
13.11 mi11:35:001:31:386:594:40
6:50
#6297
25K
15.53 mi11:51:371:48:156:5816:37
6:51
#6015
30K
18.64 mi12:13:112:09:496:5821:34
6:56
#5606
20M
20.00 mi12:22:362:19:146:589:25
6:56
#5428
21M
21.00 mi12:29:472:26:256:587:11
7:11
#5228
35K
21.75 mi12:34:532:31:316:585:06
6:49
#5171
23M
23.00 mi12:43:342:40:126:588:41
6:56
#5020
24M
24.00 mi12:50:212:46:596:576:47
6:47
#4898
40K
24.85 mi12:56:102:52:486:575:49
6:48
#4789
25.2M
25.20 mi12:58:422:55:206:572:32
7:21
#4745
Finish
26.22 mi13:05:073:01:456:566:25
6:18
#4563
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi7111635363536075(Top 23%)5517(Top 36%)5517(Top 104%)
10K6.21 mi3.10 mi6819+2926129+2246129+2246588(Top 25%)5920(Top 39%)5920(Top 112%)
15K9.32 mi3.11 mi6558+2615919+2105919+2106075(Top 23%)5517(Top 36%)5517(Top 104%)
20K12.43 mi3.11 mi6334+2245731+1885731+1885726(Top 22%)5249(Top 35%)5249(Top 99%)
Half13.11 mi0.68 mi6297+375704+275704+275531(Top 21%)5091(Top 34%)5091(Top 96%)
25K15.53 mi2.42 mi6015+2825493+2115493+2114614(Top 17%)4293(Top 28%)4293(Top 81%)
30K18.64 mi3.11 mi5606+4095151+3425151+3423952(Top 15%)3695(Top 24%)3695(Top 70%)
20M20.00 mi1.36 mi5428+1784998+1534998+1533614(Top 14%)3373(Top 22%)3373(Top 64%)
21M21.00 mi1.00 mi5228+2004823+1754823+1753032(Top 11%)2843(Top 19%)2843(Top 54%)
35K21.75 mi0.75 mi5171+574767+564767+564302(Top 16%)3937(Top 26%)3937(Top 74%)
23M23.00 mi1.25 mi5020+1514628+1394628+1393456(Top 13%)3204(Top 21%)3204(Top 61%)
24M24.00 mi1.00 mi4898+1224527+1014527+1013575(Top 13%)3286(Top 22%)3286(Top 62%)
40K24.85 mi0.85 mi4789+1094431+964431+962876(Top 11%)2650(Top 17%)2650(Top 50%)
25.2M25.20 mi0.35 mi4745+444391+404391+403202(Top 12%)2925(Top 19%)2925(Top 55%)
Finish26.22 mi1.02 mi4563+1824237+1544237+1541645(Top 6%)1550(Top 10%)1550(Top 29%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 23%
×21stories
+97ft-345ft

Overall

6075

Males

5517

M18-39

5517

5K→10K

3.1 - 6.2 mi

Top 25%
×5stories
+79ft-138ft

Overall

6588

Males

5920

M18-39

5920

10K→15K

6.2 - 9.3 mi

Top 23%
×3stories
+67ft-78ft

Overall

6075

Males

5517

M18-39

5517

15K→20K

9.3 - 12.4 mi

Top 22%
×5stories
+106ft-86ft

Overall

5726

Males

5249

M18-39

5249

20K→Half

12.4 - 13.1 mi

Top 21%
×2stories
+19ft-37ft

Overall

5531

Males

5091

M18-39

5091

Half→25K

13.1 - 15.5 mi

Top 17%
×4stories
+66ft-88ft

Overall

4614

Males

4293

M18-39

4293

25K→30K

15.5 - 18.6 mi

Top 15%
×9stories
+181ft-148ft

Overall

3952

Males

3695

M18-39

3695

30K→20M

18.6 - 20.0 mi

Top 14%
×5stories
+64ft-50ft

Overall

3614

Males

3373

M18-39

3373

20M→21M

20.0 - 21.0 mi

Top 11%
×8stories
+106ft-24ft

Overall

3032

Males

2843

M18-39

2843

21M→35K

21.0 - 21.8 mi

Top 16%
×7stories
+17ft-86ft

Overall

4302

Males

3937

M18-39

3937

35K→23M

21.8 - 23.0 mi

Top 13%
×5stories
+23ft-63ft

Overall

3456

Males

3204

M18-39

3204

23M→24M

23.0 - 24.0 mi

Top 13%
×6stories
+12ft-82ft

Overall

3575

Males

3286

M18-39

3286

24M→40K

24.0 - 24.9 mi

Top 11%
×1story
+6ft-20ft

Overall

2876

Males

2650

M18-39

2650

40K→25.2M

24.9 - 25.2 mi

Top 12%
×1story
+13ft-16ft

Overall

3202

Males

2925

M18-39

2925

25.2M→Finish

25.2 - 26.2 mi

Top 6%
×2stories
+22ft-21ft

Overall

1645

Males

1550

M18-39

1550

Passing Analysis

Category:
Athletes Passed
2710
Passed By
162
Net Change
+2548
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#7111
5K → 10K37280+292#7111#6819
10K → 15K28827+261#6819#6558
15K → 20K24319+224#6558#6334
20K → Half381+37#6334#6297
Half → 25K2864+282#6297#6015
25K → 30K4145+409#6015#5606
30K → 20M1791+178#5606#5428
20M → 21M2000+200#5428#5228
21M → 35K625+57#5228#5171
35K → 23M16110+151#5171#5020
23M → 24M1264+122#5020#4898
24M → 40K1123+109#4898#4789
40K → 25.2M473+44#4789#4745
25.2M → Finish1820+182#4745#4563
TOTALS2710162+2548
📊

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