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BOSTON MARATHON 2023

Bernard Alcock

Bib: 30887•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 (M50-54)
#0 / 2052
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
9:11/mi
28:32
↑ 97↓ 3451.5%
10K· 6.21 mi
8:57/mi
56:20
↑ 79↓ 1380.4%
15K· 9.32 mi
9:14/mi
1:25:01
↑ 67↓ 78
20K· 12.43 mi
9:39/mi
1:55:00
↑ 106↓ 860.1%
Half· 13.11 mi
9:39/mi
2:01:35
↑ 19↓ 370.5%
25K· 15.53 mi
10:16/mi
2:26:29
↑ 66↓ 880.2%
30K· 18.64 mi
10:39/mi
2:59:34
↑ 181↓ 1480.2%
20M
10:57/mi
3:14:27
↑ 64↓ 500.2%
21M
11:16/mi
3:25:43
↑ 106↓ 241.6%
35K· 21.75 mi
10:26/mi
3:33:31
↑ 17↓ 861.7%
23M
10:42/mi
3:46:55
↑ 23↓ 630.6%
24M
10:02/mi
3:56:57
↓ 821.3%
40K· 24.85 mi
10:27/mi
4:05:53
↓ 200.3%
25.2M
10:58/mi
4:09:40
↑ 13↓ 160.2%
Finish· 26.22 mi
9:11/mi
4:19:02
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:01:35
Pace9:16 /mi
2nd Half
Distance13.11 mi
Time2:17:27
Pace10:29 /mi
📊Positive Split: 13.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:51:2528:329:1128:32
9:11
-
10K
6.21 mi12:19:1356:209:0427:48
8:57
-0:14
15K
9.32 mi12:47:541:25:019:0728:41
9:14
+0:17
20K
12.43 mi13:17:531:55:009:1529:59
9:39
+0:25
Half
13.11 mi13:24:282:01:359:166:35
9:39
0:00
25K
15.53 mi13:49:222:26:299:2624:54
10:16
+0:37
30K
18.64 mi14:22:272:59:349:3833:05
10:39
+0:23
20M
20.00 mi14:37:203:14:279:4314:53
10:57
+0:18
21M
21.00 mi14:48:363:25:439:4811:16
11:16
+0:19
35K
21.75 mi14:56:243:33:319:497:48
10:26
-0:50
23M
23.00 mi15:09:483:46:559:5213:24
10:42
+0:16
24M
24.00 mi15:19:503:56:579:5210:02
10:02
-0:40
40K
24.85 mi15:28:464:05:539:548:56
10:27
+0:25
25.2M
25.20 mi15:32:334:09:409:543:47
10:58
+0:31
Finish
26.22 mi15:41:554:19:029:539:22
9:11
-1:47

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

8:57 /mi

Average Pace

9:53 /mi

Slowest Pace

11:16 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:10:57

51% of race

Time at Steady Pace

51:40

20% of race

Time at Slower Pace

1:16:25

30% of race

Average Pace: 9:53 /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 mi11:51:2528:329:1128:32
9:11
#21166
10K
6.21 mi12:19:1356:209:0427:48
8:57
#20915
15K
9.32 mi12:47:541:25:019:0728:41
9:14
#21113
20K
12.43 mi13:17:531:55:009:1529:59
9:39
#21362
Half
13.11 mi13:24:282:01:359:166:35
9:39
#21419
25K
15.53 mi13:49:222:26:299:2624:54
10:16
#21664
30K
18.64 mi14:22:272:59:349:3833:05
10:39
#21864
20M
20.00 mi14:37:203:14:279:4314:53
10:57
#21940
21M
21.00 mi14:48:363:25:439:4811:16
11:16
#21918
35K
21.75 mi14:56:243:33:319:497:48
10:26
#21939
23M
23.00 mi15:09:483:46:559:5213:24
10:42
#21929
24M
24.00 mi15:19:503:56:579:5210:02
10:02
#21881
40K
24.85 mi15:28:464:05:539:548:56
10:27
#21849
25.2M
25.20 mi15:32:334:09:409:543:47
10:58
#21821
Finish
26.22 mi15:41:554:19:029:539:22
9:11
#21739
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi21166126901269021406(Top 80%)12934(Top 85%)12934(Top 630%)
10K6.21 mi3.10 mi20915+25112620+7012620+7020673(Top 78%)12576(Top 83%)12576(Top 613%)
15K9.32 mi3.11 mi21113-19812749-12912749-12921406(Top 80%)12934(Top 85%)12934(Top 630%)
20K12.43 mi3.11 mi21362-24912869-12012869-12021998(Top 83%)13178(Top 87%)13178(Top 642%)
Half13.11 mi0.68 mi21419-5712896-2712896-2722497(Top 85%)13395(Top 88%)13395(Top 653%)
25K15.53 mi2.42 mi21664-24513010-11413010-11422773(Top 86%)13492(Top 89%)13492(Top 658%)
30K18.64 mi3.11 mi21864-20013087-7713087-7722504(Top 85%)13294(Top 88%)13294(Top 648%)
20M20.00 mi1.36 mi21940-7613107-2013107-2022619(Top 85%)13284(Top 88%)13284(Top 647%)
21M21.00 mi1.00 mi21918+2213086+2113086+2121402(Top 80%)12695(Top 84%)12695(Top 619%)
35K21.75 mi0.75 mi21939-2113098-1213098-1222226(Top 83%)13026(Top 86%)13026(Top 635%)
23M23.00 mi1.25 mi21929+1013081+1713081+1721758(Top 82%)12796(Top 84%)12796(Top 624%)
24M24.00 mi1.00 mi21881+4813046+3513046+3520876(Top 78%)12378(Top 82%)12378(Top 603%)
40K24.85 mi0.85 mi21849+3213016+3013016+3021086(Top 79%)12402(Top 82%)12402(Top 604%)
25.2M25.20 mi0.35 mi21821+2812997+1912997+1920382(Top 77%)12109(Top 80%)12109(Top 590%)
Finish26.22 mi1.02 mi21739+8212956+4112956+4118869(Top 71%)11485(Top 76%)11485(Top 560%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 80%
×21story building
+97ft-345ft

Overall

21406

Males

12934

M50-54

12934

5K→10K

3.1 - 6.2 mi

Top 78%
×5story building
+79ft-138ft

Overall

20673

Males

12576

M50-54

12576

10K→15K

6.2 - 9.3 mi

Top 80%
×3story building
+67ft-78ft

Overall

21406

Males

12934

M50-54

12934

15K→20K

9.3 - 12.4 mi

Top 83%
×5story building
+106ft-86ft

Overall

21998

Males

13178

M50-54

13178

20K→Half

12.4 - 13.1 mi

Top 85%
×2story building
+19ft-37ft

Overall

22497

Males

13395

M50-54

13395

Half→25K

13.1 - 15.5 mi

Top 86%
×4story building
+66ft-88ft

Overall

22773

Males

13492

M50-54

13492

25K→30K

15.5 - 18.6 mi

Top 85%
×9story building
+181ft-148ft

Overall

22504

Males

13294

M50-54

13294

30K→20M

18.6 - 20.0 mi

Top 85%
×5story building
+64ft-50ft

Overall

22619

Males

13284

M50-54

13284

20M→21M

20.0 - 21.0 mi

Top 80%
×8story building
+106ft-24ft

Overall

21402

Males

12695

M50-54

12695

21M→35K

21.0 - 21.8 mi

Top 83%
×7story building
+17ft-86ft

Overall

22226

Males

13026

M50-54

13026

35K→23M

21.8 - 23.0 mi

Top 82%
×5story building
+23ft-63ft

Overall

21758

Males

12796

M50-54

12796

23M→24M

23.0 - 24.0 mi

Top 78%
×6story building
+12ft-82ft

Overall

20876

Males

12378

M50-54

12378

24M→40K

24.0 - 24.9 mi

Top 79%
×1story
+6ft-20ft

Overall

21086

Males

12402

M50-54

12402

40K→25.2M

24.9 - 25.2 mi

Top 77%
×1story
+13ft-16ft

Overall

20382

Males

12109

M50-54

12109

25.2M→Finish

25.2 - 26.2 mi

Top 71%
×2story building
+22ft-21ft

Overall

18869

Males

11485

M50-54

11485

Passing Analysis

Category:
Athletes Passed
1145
Passed By
1718
Net Change
-573
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#21166
5K → 10K420169+251#21166#20915
10K → 15K94292-198#20915#21113
15K → 20K64313-249#21113#21362
20K → Half865-57#21362#21419
Half → 25K42287-245#21419#21664
25K → 30K84284-200#21664#21864
30K → 20M50126-76#21864#21940
20M → 21M7250+22#21940#21918
21M → 35K2142-21#21918#21939
35K → 23M6151+10#21939#21929
23M → 24M6214+48#21929#21881
24M → 40K5119+32#21881#21849
40K → 25.2M313+28#21849#21821
25.2M → Finish853+82#21821#21739
TOTALS11451718-573
📊

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