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BOSTON MARATHON 2023

Jason Scarbro

Bib: 8251•M

NB

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 37%
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Top 40%
Division (M45-49)
#0 / 2252
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
22:06
Rank: #6960
Start → 5K
7:07/mi
22:06 split
10K· 6.21 mi
44:59
Rank: #8027 (-1067)
5K → 10K
7:22/mi
22:53 split
15K· 9.32 mi
1:08:04
Rank: #8484 (-457)
10K → 15K
7:26/mi
23:05 split
20K· 12.43 mi
1:31:26
Rank: #8677 (-193)
15K → 20K
7:31/mi
23:22 split
Half· 13.11 mi
1:36:32
Rank: #8734 (-57)
20K → Half
7:29/mi
5:06 split
25K· 15.53 mi
1:55:01
Rank: #8865 (-131)
Half → 25K
7:37/mi
18:29 split
30K· 18.64 mi
2:19:47
Rank: #9148 (-283)
25K → 30K
7:58/mi
24:46 split
20M
2:30:39
Rank: #9212 (-64)
30K → 20M
8:00/mi
10:52 split
21M
2:39:16
Rank: #9294 (-82)
20M → 21M
8:37/mi
8:37 split
35K· 21.75 mi
2:45:15
Rank: #9386 (-92)
21M → 35K
8:00/mi
5:59 split
23M
2:55:36
Rank: #9488 (-102)
35K → 23M
8:16/mi
10:21 split
24M
3:03:38
Rank: #9563 (-75)
23M → 24M
8:02/mi
8:02 split
40K· 24.85 mi
3:10:40
Rank: #9595 (-32)
24M → 40K
8:14/mi
7:02 split
25.2M
3:13:43
Rank: #9609 (-14)
40K → 25.2M
8:51/mi
3:03 split
Finish· 26.22 mi
3:22:03
Rank: #9740 (-131)
25.2M → Finish
8:11/mi
8:20 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:36:32
Pace7:22 /mi
2nd Half
Distance13.11 mi
Time1:45:31
Pace8:03 /mi
📊Positive Split: 9.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:47:3022:067:0722:06
7:07
-
10K
6.21 mi11:10:2344:597:1422:53
7:22
+0:15
15K
9.32 mi11:33:281:08:047:1823:05
7:26
+0:04
20K
12.43 mi11:56:501:31:267:2123:22
7:31
+0:05
Half
13.11 mi12:01:561:36:327:225:06
7:29
-0:02
25K
15.53 mi12:20:251:55:017:2418:29
7:37
+0:08
30K
18.64 mi12:45:112:19:477:3024:46
7:58
+0:21
20M
20.00 mi12:56:032:30:397:3210:52
8:00
+0:02
21M
21.00 mi13:04:402:39:167:358:37
8:37
+0:37
35K
21.75 mi13:10:392:45:157:365:59
8:00
-0:37
23M
23.00 mi13:21:002:55:367:3810:21
8:16
+0:16
24M
24.00 mi13:29:023:03:387:398:02
8:02
-0:14
40K
24.85 mi13:36:043:10:407:407:02
8:14
+0:12
25.2M
25.20 mi13:39:073:13:437:413:03
8:51
+0:37
Finish
26.22 mi13:47:273:22:037:438:20
8:11
-0:40

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

7:07 /mi

Average Pace

7:43 /mi

Slowest Pace

8:51 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:55:01

57% of race

Time at Steady Pace

1:05:01

32% of race

Time at Slower Pace

22:01

11% of race

Average Pace: 7:42 /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 mi10:47:3022:067:0722:06
7:07
#6960
10K
6.21 mi11:10:2344:597:1422:53
7:22
#8027
15K
9.32 mi11:33:281:08:047:1823:05
7:26
#8484
20K
12.43 mi11:56:501:31:267:2123:22
7:31
#8677
Half
13.11 mi12:01:561:36:327:225:06
7:29
#8734
25K
15.53 mi12:20:251:55:017:2418:29
7:37
#8865
30K
18.64 mi12:45:112:19:477:3024:46
7:58
#9148
20M
20.00 mi12:56:032:30:397:3210:52
8:00
#9212
21M
21.00 mi13:04:402:39:167:358:37
8:37
#9294
35K
21.75 mi13:10:392:45:157:365:59
8:00
#9386
23M
23.00 mi13:21:002:55:367:3810:21
8:16
#9488
24M
24.00 mi13:29:023:03:387:398:02
8:02
#9563
40K
24.85 mi13:36:043:10:407:407:02
8:14
#9595
25.2M
25.20 mi13:39:073:13:437:413:03
8:51
#9609
Finish
26.22 mi13:47:273:22:037:438:20
8:11
#9740
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi6960624162419592(Top 36%)7919(Top 52%)7919(Top 352%)
10K6.21 mi3.10 mi8027-10676977-7366977-7369350(Top 35%)7774(Top 51%)7774(Top 345%)
15K9.32 mi3.11 mi8484-4577259-2827259-2829592(Top 36%)7919(Top 52%)7919(Top 352%)
20K12.43 mi3.11 mi8677-1937359-1007359-1009466(Top 36%)7779(Top 51%)7779(Top 345%)
Half13.11 mi0.68 mi8734-577392-337392-339976(Top 37%)8086(Top 53%)8086(Top 359%)
25K15.53 mi2.42 mi8865-1317458-667458-669718(Top 37%)7831(Top 52%)7831(Top 348%)
30K18.64 mi3.11 mi9148-2837592-1347592-13410643(Top 40%)8162(Top 54%)8162(Top 362%)
20M20.00 mi1.36 mi9212-647606-147606-1410212(Top 38%)7865(Top 52%)7865(Top 349%)
21M21.00 mi1.00 mi9294-827630-247630-2411119(Top 42%)8168(Top 54%)8168(Top 363%)
35K21.75 mi0.75 mi9386-927670-407670-4012058(Top 45%)8567(Top 56%)8567(Top 380%)
23M23.00 mi1.25 mi9488-1027715-457715-4511607(Top 44%)8281(Top 55%)8281(Top 368%)
24M24.00 mi1.00 mi9563-757726-117726-1111441(Top 43%)8117(Top 53%)8117(Top 360%)
40K24.85 mi0.85 mi9595-327716+107716+1011499(Top 43%)8065(Top 53%)8065(Top 358%)
25.2M25.20 mi0.35 mi9609-147706+107706+1011507(Top 43%)8021(Top 53%)8021(Top 356%)
Finish26.22 mi1.02 mi9740-1317747-417747-4113242(Top 50%)8887(Top 59%)8887(Top 395%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 36%
×21story building
+97ft-345ft

Overall

9592

Males

7919

M45-49

7919

5K→10K

3.1 - 6.2 mi

Top 35%
×5story building
+79ft-138ft

Overall

9350

Males

7774

M45-49

7774

10K→15K

6.2 - 9.3 mi

Top 36%
×3story building
+67ft-78ft

Overall

9592

Males

7919

M45-49

7919

15K→20K

9.3 - 12.4 mi

Top 36%
×5story building
+106ft-86ft

Overall

9466

Males

7779

M45-49

7779

20K→Half

12.4 - 13.1 mi

Top 37%
×2story building
+19ft-37ft

Overall

9976

Males

8086

M45-49

8086

Half→25K

13.1 - 15.5 mi

Top 37%
×4story building
+66ft-88ft

Overall

9718

Males

7831

M45-49

7831

25K→30K

15.5 - 18.6 mi

Top 40%
×9story building
+181ft-148ft

Overall

10643

Males

8162

M45-49

8162

30K→20M

18.6 - 20.0 mi

Top 38%
×5story building
+64ft-50ft

Overall

10212

Males

7865

M45-49

7865

20M→21M

20.0 - 21.0 mi

Top 42%
×8story building
+106ft-24ft

Overall

11119

Males

8168

M45-49

8168

21M→35K

21.0 - 21.8 mi

Top 45%
×7story building
+17ft-86ft

Overall

12058

Males

8567

M45-49

8567

35K→23M

21.8 - 23.0 mi

Top 44%
×5story building
+23ft-63ft

Overall

11607

Males

8281

M45-49

8281

23M→24M

23.0 - 24.0 mi

Top 43%
×6story building
+12ft-82ft

Overall

11441

Males

8117

M45-49

8117

24M→40K

24.0 - 24.9 mi

Top 43%
×1story
+6ft-20ft

Overall

11499

Males

8065

M45-49

8065

40K→25.2M

24.9 - 25.2 mi

Top 43%
×1story
+13ft-16ft

Overall

11507

Males

8021

M45-49

8021

25.2M→Finish

25.2 - 26.2 mi

Top 50%
×2story building
+22ft-21ft

Overall

13242

Males

8887

M45-49

8887

Passing Analysis

Category:
Athletes Passed
663*
Passed By
3443
Net Change
-2780
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#6960
5K → 10K201087-1067#6960#8027
10K → 15K37494-457#8027#8484
15K → 20K80273-193#8484#8677
20K → Half966-57#8677#8734
Half → 25K61192-131#8734#8865
25K → 30K101384-283#8865#9148
30K → 20M58122-64#9148#9212
20M → 21M61143-82#9212#9294
21M → 35K24116-92#9294#9386
35K → 23M61163-102#9386#9488
23M → 24M40115-75#9488#9563
24M → 40K47*79-32#9563#9595
40K → 25.2M3650-14#9595#9609
25.2M → Finish28159-131#9609#9740
TOTALS663*3443-2780

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

📊

Passing Visuals

Category:
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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