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BOSTON MARATHON 2023

Justin Stringfellow

Bib: 8238•M

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Overall
#0 / 26622
Top 38%
Gender (Male)
#0 / 15176
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
23:20
Rank: #9712
Start → 5K
23:20 | 7:31/mi
10K· 6.21 mi
48:07
Rank: #12204 (-2492)
5K → 10K
24:47 | 7:59/mi
15K· 9.32 mi
1:11:39
Rank: #11671 (+533)
10K → 15K
23:32 | 7:34/mi
20K· 12.43 mi
1:35:26
Rank: #11337 (+334)
15K → 20K
23:47 | 7:39/mi
Half· 13.11 mi
1:40:28
Rank: #11218 (+119)
20K → Half
5:02 | 7:23/mi
25K· 15.53 mi
1:59:08
Rank: #11050 (+168)
Half → 25K
18:40 | 7:42/mi
30K· 18.64 mi
2:23:28
Rank: #10739 (+311)
25K → 30K
24:20 | 7:50/mi
20M
2:34:14
Rank: #10646 (+93)
30K → 20M
10:46 | 7:55/mi
21M
2:42:34
Rank: #10546 (+100)
20M → 21M
8:20 | 8:20/mi
35K· 21.75 mi
2:48:18
Rank: #10484 (+62)
21M → 35K
5:44 | 7:40/mi
23M
2:58:12
Rank: #10380 (+104)
35K → 23M
9:54 | 7:54/mi
24M
3:06:06
Rank: #10373 (+7)
23M → 24M
7:54 | 7:54/mi
40K· 24.85 mi
3:12:44
Rank: #10265 (+108)
24M → 40K
6:38 | 7:45/mi
25.2M
3:15:35
Rank: #10212 (+53)
40K → 25.2M
2:51 | 8:16/mi
Finish· 26.22 mi
3:23:11
Rank: #10094 (+118)
25.2M → Finish
7:36 | 7:27/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:40:28
Pace7:40 /mi
2nd Half
Distance13.11 mi
Time1:42:43
Pace7:50 /mi
📊Positive Split: 2.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:48:4323:207:3123:20
7:31
-
10K
6.21 mi11:13:3048:077:4524:47
7:59
+0:28
15K
9.32 mi11:37:021:11:397:4123:32
7:34
-0:25
20K
12.43 mi12:00:491:35:267:4123:47
7:39
+0:05
Half
13.11 mi12:05:511:40:287:405:02
7:23
-0:16
25K
15.53 mi12:24:311:59:087:4018:40
7:42
+0:19
30K
18.64 mi12:48:512:23:287:4224:20
7:50
+0:08
20M
20.00 mi12:59:372:34:147:4310:46
7:55
+0:05
21M
21.00 mi13:07:572:42:347:448:20
8:20
+0:25
35K
21.75 mi13:13:412:48:187:445:44
7:40
-0:40
23M
23.00 mi13:23:352:58:127:459:54
7:54
+0:14
24M
24.00 mi13:31:293:06:067:457:54
7:54
0:00
40K
24.85 mi13:38:073:12:447:456:38
7:45
-0:09
25.2M
25.20 mi13:40:583:15:357:462:51
8:16
+0:31
Finish
26.22 mi13:48:343:23:117:457:36
7:27
-0:49

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

7:23 /mi

Average Pace

7:45 /mi

Slowest Pace

8:20 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:12:00

94% of race

Time at Steady Pace

11:11

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:45 /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 mi10:48:4323:207:3123:20
7:31
#9712
10K
6.21 mi11:13:3048:077:4524:47
7:59
#12204
15K
9.32 mi11:37:021:11:397:4123:32
7:34
#11671
20K
12.43 mi12:00:491:35:267:4123:47
7:39
#11337
Half
13.11 mi12:05:511:40:287:405:02
7:23
#11218
25K
15.53 mi12:24:311:59:087:4018:40
7:42
#11050
30K
18.64 mi12:48:512:23:287:4224:20
7:50
#10739
20M
20.00 mi12:59:372:34:147:4310:46
7:55
#10646
21M
21.00 mi13:07:572:42:347:448:20
8:20
#10546
35K
21.75 mi13:13:412:48:187:445:44
7:40
#10484
23M
23.00 mi13:23:352:58:127:459:54
7:54
#10380
24M
24.00 mi13:31:293:06:067:457:54
7:54
#10373
40K
24.85 mi13:38:073:12:447:456:38
7:45
#10265
25.2M
25.20 mi13:40:583:15:357:462:51
8:16
#10212
Finish
26.22 mi13:48:343:23:117:457:36
7:27
#10094
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi97127986798610786(Top 41%)8544(Top 56%)8544(Top 162%)
10K6.21 mi3.10 mi12204-24929208-12229208-122214622(Top 55%)10166(Top 67%)10166(Top 192%)
15K9.32 mi3.11 mi11671+5338949+2598949+25910786(Top 41%)8544(Top 56%)8544(Top 162%)
20K12.43 mi3.11 mi11337+3348800+1498800+14910544(Top 40%)8358(Top 55%)8358(Top 158%)
Half13.11 mi0.68 mi11218+1198747+538747+539225(Top 35%)7660(Top 50%)7660(Top 145%)
25K15.53 mi2.42 mi11050+1688653+948653+9410271(Top 39%)8134(Top 54%)8134(Top 154%)
30K18.64 mi3.11 mi10739+3118452+2018452+2019602(Top 36%)7623(Top 50%)7623(Top 144%)
20M20.00 mi1.36 mi10646+938377+758377+759711(Top 36%)7586(Top 50%)7586(Top 144%)
21M21.00 mi1.00 mi10546+1008307+708307+709405(Top 35%)7292(Top 48%)7292(Top 138%)
35K21.75 mi0.75 mi10484+628261+468261+469683(Top 36%)7455(Top 49%)7455(Top 141%)
23M23.00 mi1.25 mi10380+1048178+838178+839117(Top 34%)7016(Top 46%)7016(Top 133%)
24M24.00 mi1.00 mi10373+78147+318147+3110499(Top 39%)7654(Top 50%)7654(Top 145%)
40K24.85 mi0.85 mi10265+1088069+788069+788378(Top 31%)6484(Top 43%)6484(Top 123%)
25.2M25.20 mi0.35 mi10212+538033+368033+368072(Top 30%)6232(Top 41%)6232(Top 118%)
Finish26.22 mi1.02 mi10094+1187936+977936+978230(Top 31%)6303(Top 42%)6303(Top 119%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 41%
×21stories
+97ft-345ft

Overall

10786

Males

8544

M18-39

8544

5K→10K

3.1 - 6.2 mi

Top 55%
×5stories
+79ft-138ft

Overall

14622

Males

10166

M18-39

10166

10K→15K

6.2 - 9.3 mi

Top 41%
×3stories
+67ft-78ft

Overall

10786

Males

8544

M18-39

8544

15K→20K

9.3 - 12.4 mi

Top 40%
×5stories
+106ft-86ft

Overall

10544

Males

8358

M18-39

8358

20K→Half

12.4 - 13.1 mi

Top 35%
×2stories
+19ft-37ft

Overall

9225

Males

7660

M18-39

7660

Half→25K

13.1 - 15.5 mi

Top 39%
×4stories
+66ft-88ft

Overall

10271

Males

8134

M18-39

8134

25K→30K

15.5 - 18.6 mi

Top 36%
×9stories
+181ft-148ft

Overall

9602

Males

7623

M18-39

7623

30K→20M

18.6 - 20.0 mi

Top 36%
×5stories
+64ft-50ft

Overall

9711

Males

7586

M18-39

7586

20M→21M

20.0 - 21.0 mi

Top 35%
×8stories
+106ft-24ft

Overall

9405

Males

7292

M18-39

7292

21M→35K

21.0 - 21.8 mi

Top 36%
×7stories
+17ft-86ft

Overall

9683

Males

7455

M18-39

7455

35K→23M

21.8 - 23.0 mi

Top 34%
×5stories
+23ft-63ft

Overall

9117

Males

7016

M18-39

7016

23M→24M

23.0 - 24.0 mi

Top 39%
×6stories
+12ft-82ft

Overall

10499

Males

7654

M18-39

7654

24M→40K

24.0 - 24.9 mi

Top 31%
×1story
+6ft-20ft

Overall

8378

Males

6484

M18-39

6484

40K→25.2M

24.9 - 25.2 mi

Top 30%
×1story
+13ft-16ft

Overall

8072

Males

6232

M18-39

6232

25.2M→Finish

25.2 - 26.2 mi

Top 31%
×2stories
+22ft-21ft

Overall

8230

Males

6303

M18-39

6303

Passing Analysis

Category:
Athletes Passed
2501*
Passed By
2881
Net Change
-382
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#9712
5K → 10K122502-2492#9712#12204
10K → 15K56633+533#12204#11671
15K → 20K36531+334#11671#11337
20K → Half1212+119#11337#11218
Half → 25K21143+168#11218#11050
25K → 30K35746+311#11050#10739
30K → 20M126*33+93#10739#10646
20M → 21M12626+100#10646#10546
21M → 35K8321+62#10546#10484
35K → 23M13430+104#10484#10380
23M → 24M6053+7#10380#10373
24M → 40K13426+108#10373#10265
40K → 25.2M64*11+53#10265#10212
25.2M → Finish14224+118#10212#10094
TOTALS2501*2881-382

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

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