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BOSTON MARATHON 2023

Randall Corson

Bib: 21335•M

CA

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M60-64)
#0 / 1110
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
8:55/mi
27:43
↑ 97↓ 3451.5%
10K· 6.21 mi
9:03/mi
55:51
↑ 79↓ 1380.4%
15K· 9.32 mi
9:14/mi
1:24:33
↑ 67↓ 78
20K· 12.43 mi
9:21/mi
1:53:37
↑ 106↓ 860.1%
Half· 13.11 mi
9:18/mi
1:59:58
↑ 19↓ 370.5%
25K· 15.53 mi
9:44/mi
2:23:33
↑ 66↓ 880.2%
30K· 18.64 mi
10:22/mi
2:55:47
↑ 181↓ 1480.2%
20M
10:56/mi
3:10:39
↑ 64↓ 500.2%
21M
11:38/mi
3:22:17
↑ 106↓ 241.6%
35K· 21.75 mi
10:47/mi
3:30:21
↑ 17↓ 861.7%
23M
11:05/mi
3:44:13
↑ 23↓ 630.6%
24M
11:37/mi
3:55:50
↓ 821.3%
40K· 24.85 mi
15:58/mi
4:09:29
↓ 200.3%
25.2M
17:12/mi
4:15:25
↑ 13↓ 160.2%
Finish· 26.22 mi
12:51/mi
4:28:31
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:59:58
Pace9:09 /mi
2nd Half
Distance13.11 mi
Time2:28:33
Pace11:20 /mi
📊Positive Split: 23.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:21:0227:438:5527:43
8:55
-
10K
6.21 mi11:49:1055:518:5928:08
9:03
+0:08
15K
9.32 mi12:17:521:24:339:0428:42
9:14
+0:11
20K
12.43 mi12:46:561:53:379:0929:04
9:21
+0:07
Half
13.11 mi12:53:171:59:589:096:21
9:18
-0:03
25K
15.53 mi13:16:522:23:339:1423:35
9:44
+0:26
30K
18.64 mi13:49:062:55:479:2632:14
10:22
+0:38
20M
20.00 mi14:03:583:10:399:3214:52
10:56
+0:34
21M
21.00 mi14:15:363:22:179:3811:38
11:38
+0:42
35K
21.75 mi14:23:403:30:219:408:04
10:47
-0:51
23M
23.00 mi14:37:323:44:139:4513:52
11:05
+0:18
24M
24.00 mi14:49:093:55:509:5011:37
11:37
+0:32
40K
24.85 mi15:02:484:09:2910:0213:39
15:58
+4:21
25.2M
25.20 mi15:08:444:15:2510:085:56
17:12
+1:14
Finish
26.22 mi15:21:504:28:3110:1513:06
12:51
-4:21

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

8:55 /mi

Average Pace

10:15 /mi

Slowest Pace

17:12 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:59:58

45% of race

Time at Steady Pace

1:55:52

43% of race

Time at Slower Pace

32:41

12% of race

Average Pace: 10:14 /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 mi11:21:0227:438:5527:43
8:55
#20078
10K
6.21 mi11:49:1055:518:5928:08
9:03
#20601
15K
9.32 mi12:17:521:24:339:0428:42
9:14
#20896
20K
12.43 mi12:46:561:53:379:0929:04
9:21
#20961
Half
13.11 mi12:53:171:59:589:096:21
9:18
#20996
25K
15.53 mi13:16:522:23:339:1423:35
9:44
#21093
30K
18.64 mi13:49:062:55:479:2632:14
10:22
#21262
20M
20.00 mi14:03:583:10:399:3214:52
10:56
#21392
21M
21.00 mi14:15:363:22:179:3811:38
11:38
#21443
35K
21.75 mi14:23:403:30:219:408:04
10:47
#21514
23M
23.00 mi14:37:323:44:139:4513:52
11:05
#21599
24M
24.00 mi14:49:093:55:509:5011:37
11:37
#21768
40K
24.85 mi15:02:484:09:2910:0213:39
15:58
#22203
25.2M
25.20 mi15:08:444:15:2510:085:56
17:12
#22376
Finish
26.22 mi15:21:504:28:3110:1513:06
12:51
#22599
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM60-64Seg. OverallSeg. MalesSeg. M60-64
5K3.11 mi3.11 mi20078121941219421429(Top 80%)12946(Top 85%)12946(Top 1166%)
10K6.21 mi3.10 mi20601-52312493-29912493-29921085(Top 79%)12750(Top 84%)12750(Top 1149%)
15K9.32 mi3.11 mi20896-29512647-15412647-15421429(Top 80%)12946(Top 85%)12946(Top 1166%)
20K12.43 mi3.11 mi20961-6512692-4512692-4521114(Top 79%)12794(Top 84%)12794(Top 1153%)
Half13.11 mi0.68 mi20996-3512710-1812710-1821528(Top 81%)12982(Top 86%)12982(Top 1170%)
25K15.53 mi2.42 mi21093-9712752-4212752-4221548(Top 81%)12942(Top 85%)12942(Top 1166%)
30K18.64 mi3.11 mi21262-16912815-6312815-6321943(Top 82%)13047(Top 86%)13047(Top 1175%)
20M20.00 mi1.36 mi21392-13012857-4212857-4222597(Top 85%)13276(Top 87%)13276(Top 1196%)
21M21.00 mi1.00 mi21443-5112875-1812875-1822116(Top 83%)13036(Top 86%)13036(Top 1174%)
35K21.75 mi0.75 mi21514-7112898-2312898-2322882(Top 86%)13325(Top 88%)13325(Top 1200%)
23M23.00 mi1.25 mi21599-8512920-2212920-2222480(Top 84%)13148(Top 87%)13148(Top 1185%)
24M24.00 mi1.00 mi21768-16912986-6612986-6624023(Top 90%)13827(Top 91%)13827(Top 1246%)
40K24.85 mi0.85 mi22203-43513181-19513181-19526401(Top 99%)15041(Top 99%)15041(Top 1355%)
25.2M25.20 mi0.35 mi22376-17313249-6813249-6826400(Top 99%)15032(Top 99%)15032(Top 1354%)
Finish26.22 mi1.02 mi22599-22313338-8913338-8925888(Top 97%)14751(Top 97%)14751(Top 1329%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 80%
×21story building
+97ft-345ft

Overall

21429

Males

12946

M60-64

12946

5K→10K

3.1 - 6.2 mi

Top 79%
×5story building
+79ft-138ft

Overall

21085

Males

12750

M60-64

12750

10K→15K

6.2 - 9.3 mi

Top 80%
×3story building
+67ft-78ft

Overall

21429

Males

12946

M60-64

12946

15K→20K

9.3 - 12.4 mi

Top 79%
×5story building
+106ft-86ft

Overall

21114

Males

12794

M60-64

12794

20K→Half

12.4 - 13.1 mi

Top 81%
×2story building
+19ft-37ft

Overall

21528

Males

12982

M60-64

12982

Half→25K

13.1 - 15.5 mi

Top 81%
×4story building
+66ft-88ft

Overall

21548

Males

12942

M60-64

12942

25K→30K

15.5 - 18.6 mi

Top 82%
×9story building
+181ft-148ft

Overall

21943

Males

13047

M60-64

13047

30K→20M

18.6 - 20.0 mi

Top 85%
×5story building
+64ft-50ft

Overall

22597

Males

13276

M60-64

13276

20M→21M

20.0 - 21.0 mi

Top 83%
×8story building
+106ft-24ft

Overall

22116

Males

13036

M60-64

13036

21M→35K

21.0 - 21.8 mi

Top 86%
×7story building
+17ft-86ft

Overall

22882

Males

13325

M60-64

13325

35K→23M

21.8 - 23.0 mi

Top 84%
×5story building
+23ft-63ft

Overall

22480

Males

13148

M60-64

13148

23M→24M

23.0 - 24.0 mi

Top 90%
×6story building
+12ft-82ft

Overall

24023

Males

13827

M60-64

13827

24M→40K

24.0 - 24.9 mi

Top 99%
×1story
+6ft-20ft

Overall

26401

Males

15041

M60-64

15041

40K→25.2M

24.9 - 25.2 mi

Top 99%
×1story
+13ft-16ft

Overall

26400

Males

15032

M60-64

15032

25.2M→Finish

25.2 - 26.2 mi

Top 97%
×2story building
+22ft-21ft

Overall

25888

Males

14751

M60-64

14751

Passing Analysis

Category:
Athletes Passed
640
Passed By
3161
Net Change
-2521
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#20078
5K → 10K105628-523#20078#20601
10K → 15K79374-295#20601#20896
15K → 20K140205-65#20896#20961
20K → Half2055-35#20961#20996
Half → 25K64161-97#20996#21093
25K → 30K79248-169#21093#21262
30K → 20M43173-130#21262#21392
20M → 21M4394-51#21392#21443
21M → 35K1788-71#21443#21514
35K → 23M37122-85#21514#21599
23M → 24M6175-169#21599#21768
24M → 40K1436-435#21768#22203
40K → 25.2M1174-173#22203#22376
25.2M → Finish5228-223#22376#22599
TOTALS6403161-2521
📊

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