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BOSTON MARATHON 2023

Ernest Johnson

Bib: 16454•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 (M55-59)
#0 / 1422
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
7:34/mi
23:30
↑ 97↓ 3451.5%
10K· 6.21 mi
7:38/mi
47:14
↑ 79↓ 1380.4%
15K· 9.32 mi
7:54/mi
1:11:48
↑ 67↓ 78
20K· 12.43 mi
8:17/mi
1:37:32
↑ 106↓ 860.1%
Half· 13.11 mi
8:10/mi
1:43:06
↑ 19↓ 370.5%
25K· 15.53 mi
8:41/mi
2:04:08
↑ 66↓ 880.2%
30K· 18.64 mi
9:13/mi
2:32:47
↑ 181↓ 1480.2%
20M
9:23/mi
2:45:32
↑ 64↓ 500.2%
21M
9:58/mi
2:55:30
↑ 106↓ 241.6%
35K· 21.75 mi
9:15/mi
3:02:25
↑ 17↓ 861.7%
23M
9:47/mi
3:14:40
↑ 23↓ 630.6%
24M
9:33/mi
3:24:13
↓ 821.3%
40K· 24.85 mi
9:41/mi
3:32:30
↓ 200.3%
25.2M
10:03/mi
3:35:58
↑ 13↓ 160.2%
Finish· 26.22 mi
9:04/mi
3:45:12
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:43:06
Pace7:52 /mi
2nd Half
Distance13.11 mi
Time2:02:06
Pace9:19 /mi
📊Positive Split: 18.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:13:3423:307:3423:30
7:34
-
10K
6.21 mi11:37:1847:147:3623:44
7:38
+0:04
15K
9.32 mi12:01:521:11:487:4224:34
7:54
+0:16
20K
12.43 mi12:27:361:37:327:5125:44
8:17
+0:23
Half
13.11 mi12:33:101:43:067:525:34
8:10
-0:07
25K
15.53 mi12:54:122:04:087:5921:02
8:41
+0:31
30K
18.64 mi13:22:512:32:478:1228:39
9:13
+0:32
20M
20.00 mi13:35:362:45:328:1712:45
9:23
+0:10
21M
21.00 mi13:45:342:55:308:219:58
9:58
+0:35
35K
21.75 mi13:52:293:02:258:236:55
9:15
-0:43
23M
23.00 mi14:04:443:14:408:2812:15
9:47
+0:32
24M
24.00 mi14:14:173:24:138:319:33
9:33
-0:14
40K
24.85 mi14:22:343:32:308:338:17
9:41
+0:08
25.2M
25.20 mi14:26:023:35:588:343:28
10:03
+0:22
Finish
26.22 mi14:35:163:45:128:369:14
9:04
-0:59

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

7:34 /mi

Average Pace

8:36 /mi

Slowest Pace

10:03 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:04:08

55% of race

Time at Steady Pace

1:07:06

30% of race

Time at Slower Pace

33:58

15% of race

Average Pace: 8:35 /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 mi11:13:3423:307:3423:30
7:34
#10204
10K
6.21 mi11:37:1847:147:3623:44
7:38
#10930
15K
9.32 mi12:01:521:11:487:4224:34
7:54
#11811
20K
12.43 mi12:27:361:37:327:5125:44
8:17
#12828
Half
13.11 mi12:33:101:43:067:525:34
8:10
#12994
25K
15.53 mi12:54:122:04:087:5921:02
8:41
#13792
30K
18.64 mi13:22:512:32:478:1228:39
9:13
#14777
20M
20.00 mi13:35:362:45:328:1712:45
9:23
#15073
21M
21.00 mi13:45:342:55:308:219:58
9:58
#15252
35K
21.75 mi13:52:293:02:258:236:55
9:15
#15405
23M
23.00 mi14:04:443:14:408:2812:15
9:47
#15699
24M
24.00 mi14:14:173:24:138:319:33
9:33
#15939
40K
24.85 mi14:22:343:32:308:338:17
9:41
#16077
25.2M
25.20 mi14:26:023:35:588:343:28
10:03
#16103
Finish
26.22 mi14:35:163:45:128:369:14
9:04
#16217
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM55-59Seg. OverallSeg. MalesSeg. M55-59
5K3.11 mi3.11 mi102048244824413605(Top 51%)9750(Top 64%)9750(Top 686%)
10K6.21 mi3.10 mi10930-7268628-3848628-38411683(Top 44%)8981(Top 59%)8981(Top 632%)
15K9.32 mi3.11 mi11811-8819005-3779005-37713605(Top 51%)9750(Top 64%)9750(Top 686%)
20K12.43 mi3.11 mi12828-10179434-4299434-42915495(Top 58%)10449(Top 69%)10449(Top 735%)
Half13.11 mi0.68 mi12994-1669498-649498-6415473(Top 58%)10490(Top 69%)10490(Top 738%)
25K15.53 mi2.42 mi13792-7989793-2959793-29517229(Top 65%)11076(Top 73%)11076(Top 779%)
30K18.64 mi3.11 mi14777-98510158-36510158-36518249(Top 69%)11438(Top 75%)11438(Top 804%)
20M20.00 mi1.36 mi15073-29610235-7710235-7718366(Top 69%)11393(Top 75%)11393(Top 801%)
21M21.00 mi1.00 mi15252-17910268-3310268-3317900(Top 67%)11180(Top 74%)11180(Top 786%)
35K21.75 mi0.75 mi15405-15310311-4310311-4318901(Top 71%)11536(Top 76%)11536(Top 811%)
23M23.00 mi1.25 mi15699-29410397-8610397-8619364(Top 73%)11722(Top 77%)11722(Top 824%)
24M24.00 mi1.00 mi15939-24010483-8610483-8619372(Top 73%)11697(Top 77%)11697(Top 823%)
40K24.85 mi0.85 mi16077-13810539-5610539-5618965(Top 71%)11465(Top 76%)11465(Top 806%)
25.2M25.20 mi0.35 mi16103-2610551-1210551-1217543(Top 66%)10800(Top 71%)10800(Top 759%)
Finish26.22 mi1.02 mi16217-11410582-3110582-3118256(Top 69%)11189(Top 74%)11189(Top 787%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 51%
×21story building
+97ft-345ft

Overall

13605

Males

9750

M55-59

9750

5K→10K

3.1 - 6.2 mi

Top 44%
×5story building
+79ft-138ft

Overall

11683

Males

8981

M55-59

8981

10K→15K

6.2 - 9.3 mi

Top 51%
×3story building
+67ft-78ft

Overall

13605

Males

9750

M55-59

9750

15K→20K

9.3 - 12.4 mi

Top 58%
×5story building
+106ft-86ft

Overall

15495

Males

10449

M55-59

10449

20K→Half

12.4 - 13.1 mi

Top 58%
×2story building
+19ft-37ft

Overall

15473

Males

10490

M55-59

10490

Half→25K

13.1 - 15.5 mi

Top 65%
×4story building
+66ft-88ft

Overall

17229

Males

11076

M55-59

11076

25K→30K

15.5 - 18.6 mi

Top 69%
×9story building
+181ft-148ft

Overall

18249

Males

11438

M55-59

11438

30K→20M

18.6 - 20.0 mi

Top 69%
×5story building
+64ft-50ft

Overall

18366

Males

11393

M55-59

11393

20M→21M

20.0 - 21.0 mi

Top 67%
×8story building
+106ft-24ft

Overall

17900

Males

11180

M55-59

11180

21M→35K

21.0 - 21.8 mi

Top 71%
×7story building
+17ft-86ft

Overall

18901

Males

11536

M55-59

11536

35K→23M

21.8 - 23.0 mi

Top 73%
×5story building
+23ft-63ft

Overall

19364

Males

11722

M55-59

11722

23M→24M

23.0 - 24.0 mi

Top 73%
×6story building
+12ft-82ft

Overall

19372

Males

11697

M55-59

11697

24M→40K

24.0 - 24.9 mi

Top 71%
×1story
+6ft-20ft

Overall

18965

Males

11465

M55-59

11465

40K→25.2M

24.9 - 25.2 mi

Top 66%
×1story
+13ft-16ft

Overall

17543

Males

10800

M55-59

10800

25.2M→Finish

25.2 - 26.2 mi

Top 69%
×2story building
+22ft-21ft

Overall

18256

Males

11189

M55-59

11189

Passing Analysis

Category:
Athletes Passed
399
Passed By
6412
Net Change
-6013
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#10204
5K → 10K75801-726#10204#10930
10K → 15K26907-881#10930#11811
15K → 20K211038-1017#11811#12828
20K → Half5171-166#12828#12994
Half → 25K27825-798#12994#13792
25K → 30K241009-985#13792#14777
30K → 20M29325-296#14777#15073
20M → 21M42221-179#15073#15252
21M → 35K15168-153#15252#15405
35K → 23M32326-294#15405#15699
23M → 24M24264-240#15699#15939
24M → 40K25163-138#15939#16077
40K → 25.2M2147-26#16077#16103
25.2M → Finish33147-114#16103#16217
TOTALS3996412-6013
📊

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