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BOSTON MARATHON 2023

Michael Jefferson

Bib: 27569•M

MA

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M40-44)
#0 / 2241
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
9:02/mi
28:04
↑ 97↓ 3451.5%
10K· 6.21 mi
8:33/mi
54:38
↑ 79↓ 1380.4%
15K· 9.32 mi
8:31/mi
1:21:06
↑ 67↓ 78
20K· 12.43 mi
8:41/mi
1:48:04
↑ 106↓ 860.1%
Half· 13.11 mi
8:42/mi
1:54:00
↑ 19↓ 370.5%
25K· 15.53 mi
8:56/mi
2:15:40
↑ 66↓ 880.2%
30K· 18.64 mi
9:22/mi
2:44:45
↑ 181↓ 1480.2%
20M
9:36/mi
2:57:48
↑ 64↓ 500.2%
21M
10:40/mi
3:08:28
↑ 106↓ 241.6%
35K· 21.75 mi
9:24/mi
3:15:30
↑ 17↓ 861.7%
23M
9:57/mi
3:27:57
↑ 23↓ 630.6%
24M
9:25/mi
3:37:22
↓ 821.3%
40K· 24.85 mi
9:47/mi
3:45:44
↓ 200.3%
25.2M
10:50/mi
3:49:28
↑ 13↓ 160.2%
Finish· 26.22 mi
8:53/mi
3:58:31
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:54:00
Pace8:42 /mi
2nd Half
Distance13.11 mi
Time2:04:31
Pace9:30 /mi
📊Positive Split: 9.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:50:2528:049:0228:04
9:02
-
10K
6.21 mi12:16:5954:388:4826:34
8:33
-0:29
15K
9.32 mi12:43:271:21:068:4226:28
8:31
-0:02
20K
12.43 mi13:10:251:48:048:4226:58
8:41
+0:10
Half
13.11 mi13:16:211:54:008:425:56
8:42
+0:01
25K
15.53 mi13:38:012:15:408:4421:40
8:56
+0:14
30K
18.64 mi14:07:062:44:458:5029:05
9:22
+0:26
20M
20.00 mi14:20:092:57:488:5313:03
9:36
+0:14
21M
21.00 mi14:30:493:08:288:5810:40
10:40
+1:04
35K
21.75 mi14:37:513:15:308:597:02
9:24
-1:16
23M
23.00 mi14:50:183:27:579:0212:27
9:57
+0:33
24M
24.00 mi14:59:433:37:229:039:25
9:25
-0:32
40K
24.85 mi15:08:053:45:449:058:22
9:47
+0:22
25.2M
25.20 mi15:11:493:49:289:063:44
10:50
+1:03
Finish
26.22 mi15:20:523:58:319:069:03
8:53
-1:57

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

8:31 /mi

Average Pace

9:06 /mi

Slowest Pace

10:50 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:56:39

49% of race

Time at Steady Pace

1:26:39

36% of race

Time at Slower Pace

35:13

15% of race

Average Pace: 9:06 /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 mi11:50:2528:049:0228:04
9:02
#20601
10K
6.21 mi12:16:5954:388:4826:34
8:33
#19627
15K
9.32 mi12:43:271:21:068:4226:28
8:31
#19042
20K
12.43 mi13:10:251:48:048:4226:58
8:41
#18762
Half
13.11 mi13:16:211:54:008:425:56
8:42
#18767
25K
15.53 mi13:38:012:15:408:4421:40
8:56
#18760
30K
18.64 mi14:07:062:44:458:5029:05
9:22
#18781
20M
20.00 mi14:20:092:57:488:5313:03
9:36
#18824
21M
21.00 mi14:30:493:08:288:5810:40
10:40
#18936
35K
21.75 mi14:37:513:15:308:597:02
9:24
#18961
23M
23.00 mi14:50:183:27:579:0212:27
9:57
#19036
24M
24.00 mi14:59:433:37:229:039:25
9:25
#19036
40K
24.85 mi15:08:053:45:449:058:22
9:47
#19052
25.2M
25.20 mi15:11:493:49:289:063:44
10:50
#19083
Finish
26.22 mi15:20:523:58:319:069:03
8:53
#19039
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi20601124101241017930(Top 67%)11457(Top 75%)11457(Top 511%)
10K6.21 mi3.10 mi19627+97412056+35412056+35418564(Top 70%)11736(Top 77%)11736(Top 524%)
15K9.32 mi3.11 mi19042+58511867+18911867+18917930(Top 67%)11457(Top 75%)11457(Top 511%)
20K12.43 mi3.11 mi18762+28011764+10311764+10317990(Top 68%)11469(Top 76%)11469(Top 512%)
Half13.11 mi0.68 mi18767-511766-211766-218889(Top 71%)11854(Top 78%)11854(Top 529%)
25K15.53 mi2.42 mi18760+711753+1311753+1318638(Top 70%)11692(Top 77%)11692(Top 522%)
30K18.64 mi3.11 mi18781-2111743+1011743+1018866(Top 71%)11723(Top 77%)11723(Top 523%)
20M20.00 mi1.36 mi18824-4311751-811751-819227(Top 72%)11792(Top 78%)11792(Top 526%)
21M21.00 mi1.00 mi18936-11211785-3411785-3420046(Top 75%)12067(Top 80%)12067(Top 538%)
35K21.75 mi0.75 mi18961-2511786-111786-119523(Top 73%)11829(Top 78%)11829(Top 528%)
23M23.00 mi1.25 mi19036-7511812-2611812-2619808(Top 74%)11935(Top 79%)11935(Top 533%)
24M24.00 mi1.00 mi1903611795+1711795+1718902(Top 71%)11493(Top 76%)11493(Top 513%)
40K24.85 mi0.85 mi19052-1611802-711802-719339(Top 73%)11638(Top 77%)11638(Top 519%)
25.2M25.20 mi0.35 mi19083-3111812-1011812-1020011(Top 75%)11919(Top 79%)11919(Top 532%)
Finish26.22 mi1.02 mi19039+4411786+2611786+2617407(Top 65%)10799(Top 71%)10799(Top 482%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 67%
×21story building
+97ft-345ft

Overall

17930

Males

11457

M40-44

11457

5K→10K

3.1 - 6.2 mi

Top 70%
×5story building
+79ft-138ft

Overall

18564

Males

11736

M40-44

11736

10K→15K

6.2 - 9.3 mi

Top 67%
×3story building
+67ft-78ft

Overall

17930

Males

11457

M40-44

11457

15K→20K

9.3 - 12.4 mi

Top 68%
×5story building
+106ft-86ft

Overall

17990

Males

11469

M40-44

11469

20K→Half

12.4 - 13.1 mi

Top 71%
×2story building
+19ft-37ft

Overall

18889

Males

11854

M40-44

11854

Half→25K

13.1 - 15.5 mi

Top 70%
×4story building
+66ft-88ft

Overall

18638

Males

11692

M40-44

11692

25K→30K

15.5 - 18.6 mi

Top 71%
×9story building
+181ft-148ft

Overall

18866

Males

11723

M40-44

11723

30K→20M

18.6 - 20.0 mi

Top 72%
×5story building
+64ft-50ft

Overall

19227

Males

11792

M40-44

11792

20M→21M

20.0 - 21.0 mi

Top 75%
×8story building
+106ft-24ft

Overall

20046

Males

12067

M40-44

12067

21M→35K

21.0 - 21.8 mi

Top 73%
×7story building
+17ft-86ft

Overall

19523

Males

11829

M40-44

11829

35K→23M

21.8 - 23.0 mi

Top 74%
×5story building
+23ft-63ft

Overall

19808

Males

11935

M40-44

11935

23M→24M

23.0 - 24.0 mi

Top 71%
×6story building
+12ft-82ft

Overall

18902

Males

11493

M40-44

11493

24M→40K

24.0 - 24.9 mi

Top 73%
×1story
+6ft-20ft

Overall

19339

Males

11638

M40-44

11638

40K→25.2M

24.9 - 25.2 mi

Top 75%
×1story
+13ft-16ft

Overall

20011

Males

11919

M40-44

11919

25.2M→Finish

25.2 - 26.2 mi

Top 65%
×2story building
+22ft-21ft

Overall

17407

Males

10799

M40-44

10799

Passing Analysis

Category:
Athletes Passed
2696
Passed By
1134
Net Change
+1562
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#20601
5K → 10K103763+974#20601#19627
10K → 15K62035+585#19627#19042
15K → 20K32343+280#19042#18762
20K → Half2631-5#18762#18767
Half → 25K121114+7#18767#18760
25K → 30K170191-21#18760#18781
30K → 20M75118-43#18781#18824
20M → 21M47159-112#18824#18936
21M → 35K3459-25#18936#18961
35K → 23M58133-75#18961#19036
23M → 24M61610#19036#19036
24M → 40K3955-16#19036#19052
40K → 25.2M1041-31#19052#19083
25.2M → Finish7531+44#19083#19039
TOTALS26961134+1562
📊

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