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BOSTON MARATHON 2023

Jonathan Foss

Bib: 4722•M

NE

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 12%
Gender (Male)
#0 / 15176
Top 20%
Division (M18-39)
#0 / 5285
Top 42%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
21:05
Rank: #4535
Start → 5K
21:05 | 6:47/mi
10K· 6.21 mi
41:57
Rank: #4484 (+51)
5K → 10K
20:52 | 6:43/mi
15K· 9.32 mi
1:02:37
Rank: #4185 (+299)
10K → 15K
20:40 | 6:39/mi
20K· 12.43 mi
1:23:43
Rank: #4215 (-30)
15K → 20K
21:06 | 6:47/mi
Half· 13.11 mi
1:28:14
Rank: #4183 (+32)
20K → Half
4:31 | 6:37/mi
25K· 15.53 mi
1:44:32
Rank: #4045 (+138)
Half → 25K
16:18 | 6:43/mi
30K· 18.64 mi
2:06:04
Rank: #3966 (+79)
25K → 30K
21:32 | 6:56/mi
20M
2:15:19
Rank: #3830 (+136)
30K → 20M
9:15 | 6:48/mi
21M
2:22:11
Rank: #3613 (+217)
20M → 21M
6:52 | 6:52/mi
35K· 21.75 mi
2:27:08
Rank: #3581 (+32)
21M → 35K
4:57 | 6:37/mi
23M
2:35:25
Rank: #3389 (+192)
35K → 23M
8:17 | 6:37/mi
24M
2:42:02
Rank: #3332 (+57)
23M → 24M
6:37 | 6:37/mi
40K· 24.85 mi
2:47:56
Rank: #3321 (+11)
24M → 40K
5:54 | 6:54/mi
25.2M
2:50:30
Rank: #3306 (+15)
40K → 25.2M
2:34 | 7:27/mi
Finish· 26.22 mi
2:57:03
Rank: #3202 (+104)
25.2M → Finish
6:33 | 6:26/mi

The Course

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Half Splits

1st Half· via Half⚖️ Balanced
Distance13.11 mi
Time1:28:14
Pace6:44 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:28:49
Pace6:47 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:23:2521:056:4721:05
6:47
-
10K
6.21 mi10:44:1741:576:4520:52
6:43
-0:04
15K
9.32 mi11:04:571:02:376:4320:40
6:39
-0:04
20K
12.43 mi11:26:031:23:436:4421:06
6:47
+0:08
Half
13.11 mi11:30:341:28:146:444:31
6:37
-0:10
25K
15.53 mi11:46:521:44:326:4416:18
6:43
+0:06
30K
18.64 mi12:08:242:06:046:4621:32
6:56
+0:13
20M
20.00 mi12:17:392:15:196:469:15
6:48
-0:08
21M
21.00 mi12:24:312:22:116:466:52
6:52
+0:04
35K
21.75 mi12:29:282:27:086:464:57
6:37
-0:15
23M
23.00 mi12:37:452:35:256:458:17
6:37
0:00
24M
24.00 mi12:44:222:42:026:456:37
6:37
0:00
40K
24.85 mi12:50:162:47:566:455:54
6:54
+0:17
25.2M
25.20 mi12:52:502:50:306:462:34
7:27
+0:33
Finish
26.22 mi12:59:232:57:036:456:33
6:26
-1:01

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

6:26 /mi

Average Pace

6:45 /mi

Slowest Pace

7:27 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:54:29

99% of race

Time at Steady Pace

2:34

1% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:45 /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 mi10:23:2521:056:4721:05
6:47
#4535
10K
6.21 mi10:44:1741:576:4520:52
6:43
#4484
15K
9.32 mi11:04:571:02:376:4320:40
6:39
#4185
20K
12.43 mi11:26:031:23:436:4421:06
6:47
#4215
Half
13.11 mi11:30:341:28:146:444:31
6:37
#4183
25K
15.53 mi11:46:521:44:326:4416:18
6:43
#4045
30K
18.64 mi12:08:242:06:046:4621:32
6:56
#3966
20M
20.00 mi12:17:392:15:196:469:15
6:48
#3830
21M
21.00 mi12:24:312:22:116:466:52
6:52
#3613
35K
21.75 mi12:29:282:27:086:464:57
6:37
#3581
23M
23.00 mi12:37:452:35:256:458:17
6:37
#3389
24M
24.00 mi12:44:222:42:026:456:37
6:37
#3332
40K
24.85 mi12:50:162:47:566:455:54
6:54
#3321
25.2M
25.20 mi12:52:502:50:306:462:34
7:27
#3306
Finish
26.22 mi12:59:232:57:036:456:33
6:26
#3202
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi4535422942293696(Top 14%)3484(Top 23%)3484(Top 66%)
10K6.21 mi3.10 mi4484+514191+384191+384481(Top 17%)4186(Top 28%)4186(Top 79%)
15K9.32 mi3.11 mi4185+2993924+2673924+2673696(Top 14%)3484(Top 23%)3484(Top 66%)
20K12.43 mi3.11 mi4215-303951-273951-274350(Top 16%)4060(Top 27%)4060(Top 77%)
Half13.11 mi0.68 mi4183+323920+313920+313560(Top 13%)3368(Top 22%)3368(Top 64%)
25K15.53 mi2.42 mi4045+1383802+1183802+1183534(Top 13%)3339(Top 22%)3339(Top 63%)
30K18.64 mi3.11 mi3966+793734+683734+683861(Top 15%)3616(Top 24%)3616(Top 68%)
20M20.00 mi1.36 mi3830+1363609+1253609+1252864(Top 11%)2699(Top 18%)2699(Top 51%)
21M21.00 mi1.00 mi3613+2173417+1923417+1921664(Top 6%)1585(Top 10%)1585(Top 30%)
35K21.75 mi0.75 mi3581+323387+303387+303082(Top 12%)2884(Top 19%)2884(Top 55%)
23M23.00 mi1.25 mi3389+1923210+1773210+1771849(Top 7%)1753(Top 12%)1753(Top 33%)
24M24.00 mi1.00 mi3332+573153+573153+572655(Top 10%)2473(Top 16%)2473(Top 47%)
40K24.85 mi0.85 mi3321+113141+123141+123315(Top 12%)3031(Top 20%)3031(Top 57%)
25.2M25.20 mi0.35 mi3306+153127+143127+143586(Top 13%)3214(Top 21%)3214(Top 61%)
Finish26.22 mi1.02 mi3202+1043029+983029+982145(Top 8%)1990(Top 13%)1990(Top 38%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 14%
×21stories
+97ft-345ft

Overall

3696

Males

3484

M18-39

3484

5K→10K

3.1 - 6.2 mi

Top 17%
×5stories
+79ft-138ft

Overall

4481

Males

4186

M18-39

4186

10K→15K

6.2 - 9.3 mi

Top 14%
×3stories
+67ft-78ft

Overall

3696

Males

3484

M18-39

3484

15K→20K

9.3 - 12.4 mi

Top 16%
×5stories
+106ft-86ft

Overall

4350

Males

4060

M18-39

4060

20K→Half

12.4 - 13.1 mi

Top 13%
×2stories
+19ft-37ft

Overall

3560

Males

3368

M18-39

3368

Half→25K

13.1 - 15.5 mi

Top 13%
×4stories
+66ft-88ft

Overall

3534

Males

3339

M18-39

3339

25K→30K

15.5 - 18.6 mi

Top 15%
×9stories
+181ft-148ft

Overall

3861

Males

3616

M18-39

3616

30K→20M

18.6 - 20.0 mi

Top 11%
×5stories
+64ft-50ft

Overall

2864

Males

2699

M18-39

2699

20M→21M

20.0 - 21.0 mi

Top 6%
×8stories
+106ft-24ft

Overall

1664

Males

1585

M18-39

1585

21M→35K

21.0 - 21.8 mi

Top 12%
×7stories
+17ft-86ft

Overall

3082

Males

2884

M18-39

2884

35K→23M

21.8 - 23.0 mi

Top 7%
×5stories
+23ft-63ft

Overall

1849

Males

1753

M18-39

1753

23M→24M

23.0 - 24.0 mi

Top 10%
×6stories
+12ft-82ft

Overall

2655

Males

2473

M18-39

2473

24M→40K

24.0 - 24.9 mi

Top 12%
×1story
+6ft-20ft

Overall

3315

Males

3031

M18-39

3031

40K→25.2M

24.9 - 25.2 mi

Top 13%
×1story
+13ft-16ft

Overall

3586

Males

3214

M18-39

3214

25.2M→Finish

25.2 - 26.2 mi

Top 8%
×2stories
+22ft-21ft

Overall

2145

Males

1990

M18-39

1990

Passing Analysis

Category:
Athletes Passed
1838
Passed By
505
Net Change
+1333
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#4535
5K → 10K233182+51#4535#4484
10K → 15K32324+299#4484#4185
15K → 20K84114-30#4185#4215
20K → Half408+32#4215#4183
Half → 25K15012+138#4183#4045
25K → 30K14768+79#4045#3966
30K → 20M14812+136#3966#3830
20M → 21M2170+217#3830#3613
21M → 35K5018+32#3613#3581
35K → 23M1975+192#3581#3389
23M → 24M6912+57#3389#3332
24M → 40K4635+11#3332#3321
40K → 25.2M249+15#3321#3306
25.2M → Finish1106+104#3306#3202
TOTALS1838505+1333
📊

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