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BOSTON MARATHON 2023

C Fred Joslyn

Bib: 2558•M

PA

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 4%
Gender (Male)
#0 / 15176
Top 7%
Division (M18-39)
#0 / 5285
Top 16%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
19:50
Rank: #1745
Start → 5K
19:50 | 6:23/mi
10K· 6.21 mi
39:07
Rank: #1547 (+198)
5K → 10K
19:17 | 6:12/mi
15K· 9.32 mi
58:26
Rank: #1447 (+100)
10K → 15K
19:19 | 6:13/mi
20K· 12.43 mi
1:18:04
Rank: #1429 (+18)
15K → 20K
19:38 | 6:19/mi
Half· 13.11 mi
1:22:19
Rank: #1432 (-3)
20K → Half
4:15 | 6:14/mi
25K· 15.53 mi
1:37:29
Rank: #1369 (+63)
Half → 25K
15:10 | 6:15/mi
30K· 18.64 mi
1:57:02
Rank: #1250 (+119)
25K → 30K
19:33 | 6:18/mi
20M
2:05:39
Rank: #1220 (+30)
30K → 20M
8:37 | 6:20/mi
21M
2:12:13
Rank: #1175 (+45)
20M → 21M
6:34 | 6:34/mi
35K· 21.75 mi
2:16:52
Rank: #1166 (+9)
21M → 35K
4:39 | 6:13/mi
23M
2:24:40
Rank: #1108 (+58)
35K → 23M
7:48 | 6:14/mi
24M
2:30:51
Rank: #1104 (+4)
23M → 24M
6:11 | 6:11/mi
40K· 24.85 mi
2:36:16
Rank: #1085 (+19)
24M → 40K
5:25 | 6:20/mi
25.2M
2:38:38
Rank: #1083 (+2)
40K → 25.2M
2:22 | 6:52/mi
Finish· 26.22 mi
2:44:42
Rank: #1046 (+37)
25.2M → Finish
6:04 | 5:57/mi

The Course

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Half Splits

1st Half· via Half⚖️ Balanced
Distance13.11 mi
Time1:22:19
Pace6:17 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:22:23
Pace6:17 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:20:4219:506:2319:50
6:23
-
10K
6.21 mi10:39:5939:076:1819:17
6:12
-0:11
15K
9.32 mi10:59:1858:266:1619:19
6:13
+0:01
20K
12.43 mi11:18:561:18:046:1719:38
6:19
+0:06
Half
13.11 mi11:23:111:22:196:174:15
6:14
-0:05
25K
15.53 mi11:38:211:37:296:1715:10
6:15
+0:01
30K
18.64 mi11:57:541:57:026:1719:33
6:18
+0:03
20M
20.00 mi12:06:312:05:396:178:37
6:20
+0:02
21M
21.00 mi12:13:052:12:136:186:34
6:34
+0:14
35K
21.75 mi12:17:442:16:526:184:39
6:13
-0:21
23M
23.00 mi12:25:322:24:406:177:48
6:14
+0:01
24M
24.00 mi12:31:432:30:516:176:11
6:11
-0:03
40K
24.85 mi12:37:082:36:166:175:25
6:20
+0:09
25.2M
25.20 mi12:39:302:38:386:182:22
6:52
+0:32
Finish
26.22 mi12:45:342:44:426:176:04
5:57
-0:55

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

5:57 /mi

Average Pace

6:17 /mi

Slowest Pace

6:52 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:35:46

95% of race

Time at Steady Pace

8:56

5% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:17 /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 mi10:20:4219:506:2319:50
6:23
#1745
10K
6.21 mi10:39:5939:076:1819:17
6:12
#1547
15K
9.32 mi10:59:1858:266:1619:19
6:13
#1447
20K
12.43 mi11:18:561:18:046:1719:38
6:19
#1429
Half
13.11 mi11:23:111:22:196:174:15
6:14
#1432
25K
15.53 mi11:38:211:37:296:1715:10
6:15
#1369
30K
18.64 mi11:57:541:57:026:1719:33
6:18
#1250
20M
20.00 mi12:06:312:05:396:178:37
6:20
#1220
21M
21.00 mi12:13:052:12:136:186:34
6:34
#1175
35K
21.75 mi12:17:442:16:526:184:39
6:13
#1166
23M
23.00 mi12:25:322:24:406:177:48
6:14
#1108
24M
24.00 mi12:31:432:30:516:176:11
6:11
#1104
40K
24.85 mi12:37:082:36:166:175:25
6:20
#1085
25.2M
25.20 mi12:39:302:38:386:182:22
6:52
#1083
Finish
26.22 mi12:45:342:44:426:176:04
5:57
#1046
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi1745166316631301(Top 5%)1239(Top 8%)1239(Top 23%)
10K6.21 mi3.10 mi1547+1981475+1881475+1881378(Top 5%)1313(Top 9%)1313(Top 25%)
15K9.32 mi3.11 mi1447+1001382+931382+931301(Top 5%)1239(Top 8%)1239(Top 23%)
20K12.43 mi3.11 mi1429+181363+191363+191457(Top 5%)1391(Top 9%)1391(Top 26%)
Half13.11 mi0.68 mi1432-31365-21365-21453(Top 5%)1389(Top 9%)1389(Top 26%)
25K15.53 mi2.42 mi1369+631306+591306+591158(Top 4%)1104(Top 7%)1104(Top 21%)
30K18.64 mi3.11 mi1250+1191195+1111195+111898(Top 3%)855(Top 6%)855(Top 16%)
20M20.00 mi1.36 mi1220+301165+301165+30970(Top 4%)927(Top 6%)927(Top 18%)
21M21.00 mi1.00 mi1175+451121+441121+44792(Top 3%)749(Top 5%)749(Top 14%)
35K21.75 mi0.75 mi1166+91112+91112+91279(Top 5%)1216(Top 8%)1216(Top 23%)
23M23.00 mi1.25 mi1108+581056+561056+56675(Top 3%)637(Top 4%)637(Top 12%)
24M24.00 mi1.00 mi1104+41052+41052+4962(Top 4%)911(Top 6%)911(Top 17%)
40K24.85 mi0.85 mi1085+191033+191033+19995(Top 4%)942(Top 6%)942(Top 18%)
25.2M25.20 mi0.35 mi1083+21031+21031+21305(Top 5%)1235(Top 8%)1235(Top 23%)
Finish26.22 mi1.02 mi1046+37995+36995+36627(Top 2%)596(Top 4%)596(Top 11%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 5%
×21stories
+97ft-345ft

Overall

1301

Males

1239

M18-39

1239

5K→10K

3.1 - 6.2 mi

Top 5%
×5stories
+79ft-138ft

Overall

1378

Males

1313

M18-39

1313

10K→15K

6.2 - 9.3 mi

Top 5%
×3stories
+67ft-78ft

Overall

1301

Males

1239

M18-39

1239

15K→20K

9.3 - 12.4 mi

Top 5%
×5stories
+106ft-86ft

Overall

1457

Males

1391

M18-39

1391

20K→Half

12.4 - 13.1 mi

Top 5%
×2stories
+19ft-37ft

Overall

1453

Males

1389

M18-39

1389

Half→25K

13.1 - 15.5 mi

Top 4%
×4stories
+66ft-88ft

Overall

1158

Males

1104

M18-39

1104

25K→30K

15.5 - 18.6 mi

Top 3%
×9stories
+181ft-148ft

Overall

898

Males

855

M18-39

855

30K→20M

18.6 - 20.0 mi

Top 4%
×5stories
+64ft-50ft

Overall

970

Males

927

M18-39

927

20M→21M

20.0 - 21.0 mi

Top 3%
×8stories
+106ft-24ft

Overall

792

Males

749

M18-39

749

21M→35K

21.0 - 21.8 mi

Top 5%
×7stories
+17ft-86ft

Overall

1279

Males

1216

M18-39

1216

35K→23M

21.8 - 23.0 mi

Top 3%
×5stories
+23ft-63ft

Overall

675

Males

637

M18-39

637

23M→24M

23.0 - 24.0 mi

Top 4%
×6stories
+12ft-82ft

Overall

962

Males

911

M18-39

911

24M→40K

24.0 - 24.9 mi

Top 4%
×1story
+6ft-20ft

Overall

995

Males

942

M18-39

942

40K→25.2M

24.9 - 25.2 mi

Top 5%
×1story
+13ft-16ft

Overall

1305

Males

1235

M18-39

1235

25.2M→Finish

25.2 - 26.2 mi

Top 2%
×2stories
+22ft-21ft

Overall

627

Males

596

M18-39

596

Passing Analysis

Category:
Athletes Passed
828
Passed By
129
Net Change
+699
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#1745
5K → 10K22022+198#1745#1547
10K → 15K11515+100#1547#1447
15K → 20K5234+18#1447#1429
20K → Half69-3#1429#1432
Half → 25K707+63#1432#1369
25K → 30K1190+119#1369#1250
30K → 20M322+30#1250#1220
20M → 21M527+45#1220#1175
21M → 35K167+9#1175#1166
35K → 23M602+58#1166#1108
23M → 24M1511+4#1108#1104
24M → 40K245+19#1104#1085
40K → 25.2M75+2#1085#1083
25.2M → Finish403+37#1083#1046
TOTALS828129+699
📊

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