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BOSTON MARATHON 2023

Keith Alston

Bib: 21918•M

VA

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

Start
0:00:00
Race begins
5K· 3.11 mi
29:13
Rank: #21816
Start → 5K
29:13 | 9:24/mi
10K· 6.21 mi
57:39
Rank: #21659 (+157)
5K → 10K
28:26 | 9:09/mi
15K· 9.32 mi
1:25:54
Rank: #21418 (+241)
10K → 15K
28:15 | 9:06/mi
20K· 12.43 mi
1:54:17
Rank: #21174 (+244)
15K → 20K
28:23 | 9:08/mi
Half· 13.11 mi
2:00:31
Rank: #21157 (+17)
20K → Half
6:14 | 9:08/mi
25K· 15.53 mi
2:25:17
Rank: #21458 (-301)
Half → 25K
24:46 | 10:13/mi
30K· 18.64 mi
2:54:50
Rank: #21104 (+354)
25K → 30K
29:33 | 9:31/mi
20M
3:07:49
Rank: #20918 (+186)
30K → 20M
12:59 | 9:33/mi
21M
3:17:41
Rank: #20731 (+187)
20M → 21M
9:52 | 9:52/mi
35K· 21.75 mi
3:24:20
Rank: #20616 (+115)
21M → 35K
6:39 | 8:53/mi
23M
3:35:47
Rank: #20403 (+213)
35K → 23M
11:27 | 9:09/mi
24M
3:44:40
Rank: #20271 (+132)
23M → 24M
8:53 | 8:53/mi
40K· 24.85 mi
3:52:19
Rank: #20142 (+129)
24M → 40K
7:39 | 8:57/mi
25.2M
3:55:36
Rank: #20076 (+66)
40K → 25.2M
3:17 | 9:31/mi
Finish· 26.22 mi
4:04:05
Rank: #19917 (+159)
25.2M → Finish
8:29 | 8:19/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:00:31
Pace9:12 /mi
2nd Half
Distance13.11 mi
Time2:03:34
Pace9:26 /mi
📊Positive Split: 2.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:45:0529:139:2429:13
9:24
-
10K
6.21 mi12:13:3157:399:1728:26
9:09
-0:15
15K
9.32 mi12:41:461:25:549:1328:15
9:06
-0:03
20K
12.43 mi13:10:091:54:179:1228:23
9:08
+0:02
Half
13.11 mi13:16:232:00:319:126:14
9:08
0:00
25K
15.53 mi13:41:092:25:179:2124:46
10:13
+1:05
30K
18.64 mi14:10:422:54:509:2329:33
9:31
-0:42
20M
20.00 mi14:23:413:07:499:2312:59
9:33
+0:02
21M
21.00 mi14:33:333:17:419:259:52
9:52
+0:19
35K
21.75 mi14:40:123:24:209:246:39
8:53
-0:59
23M
23.00 mi14:51:393:35:479:2311:27
9:09
+0:16
24M
24.00 mi15:00:323:44:409:228:53
8:53
-0:16
40K
24.85 mi15:08:113:52:199:217:39
8:57
+0:04
25.2M
25.20 mi15:11:283:55:369:213:17
9:31
+0:34
Finish
26.22 mi15:19:574:04:059:198:29
8:19
-1:12

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

8:19 /mi

Average Pace

9:19 /mi

Slowest Pace

10:13 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

24:01

10% of race

Time at Steady Pace

1:50:24

45% of race

Time at Slower Pace

1:49:40

45% of race

Average Pace: 9:19 /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 mi11:45:0529:139:2429:13
9:24
#21816
10K
6.21 mi12:13:3157:399:1728:26
9:09
#21659
15K
9.32 mi12:41:461:25:549:1328:15
9:06
#21418
20K
12.43 mi13:10:091:54:179:1228:23
9:08
#21174
Half
13.11 mi13:16:232:00:319:126:14
9:08
#21157
25K
15.53 mi13:41:092:25:179:2124:46
10:13
#21458
30K
18.64 mi14:10:422:54:509:2329:33
9:31
#21104
20M
20.00 mi14:23:413:07:499:2312:59
9:33
#20918
21M
21.00 mi14:33:333:17:419:259:52
9:52
#20731
35K
21.75 mi14:40:123:24:209:246:39
8:53
#20616
23M
23.00 mi14:51:393:35:479:2311:27
9:09
#20403
24M
24.00 mi15:00:323:44:409:228:53
8:53
#20271
40K
24.85 mi15:08:113:52:199:217:39
8:57
#20142
25.2M
25.20 mi15:11:283:55:369:213:17
9:31
#20076
Finish
26.22 mi15:19:574:04:059:198:29
8:19
#19917
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM60-64Seg. OverallSeg. MalesSeg. M60-64
5K3.11 mi3.11 mi21816130021300220916(Top 79%)12704(Top 84%)12704(Top 1145%)
10K6.21 mi3.10 mi21659+15712970+3212970+3221470(Top 81%)12907(Top 85%)12907(Top 1163%)
15K9.32 mi3.11 mi21418+24112890+8012890+8020916(Top 79%)12704(Top 84%)12704(Top 1145%)
20K12.43 mi3.11 mi21174+24412792+9812792+9820296(Top 76%)12438(Top 82%)12438(Top 1121%)
Half13.11 mi0.68 mi21157+1712785+712785+720927(Top 79%)12695(Top 84%)12695(Top 1144%)
25K15.53 mi2.42 mi21458-30112915-13012915-13022640(Top 85%)13427(Top 88%)13427(Top 1210%)
30K18.64 mi3.11 mi21104+35412743+17212743+17219474(Top 73%)11999(Top 79%)11999(Top 1081%)
20M20.00 mi1.36 mi20918+18612649+9412649+9419057(Top 72%)11711(Top 77%)11711(Top 1055%)
21M21.00 mi1.00 mi20731+18712559+9012559+9017506(Top 66%)11007(Top 73%)11007(Top 992%)
35K21.75 mi0.75 mi20616+11512496+6312496+6317385(Top 65%)10884(Top 72%)10884(Top 981%)
23M23.00 mi1.25 mi20403+21312385+11112385+11116765(Top 63%)10586(Top 70%)10586(Top 954%)
24M24.00 mi1.00 mi20271+13212319+6612319+6616679(Top 63%)10484(Top 69%)10484(Top 945%)
40K24.85 mi0.85 mi20142+12912255+6412255+6415859(Top 60%)10080(Top 66%)10080(Top 908%)
25.2M25.20 mi0.35 mi20076+6612221+3412221+3415274(Top 57%)9815(Top 65%)9815(Top 884%)
Finish26.22 mi1.02 mi19917+15912154+6712154+6714252(Top 54%)9371(Top 62%)9371(Top 844%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 79%
×21stories
+97ft-345ft

Overall

20916

Males

12704

M60-64

12704

5K→10K

3.1 - 6.2 mi

Top 81%
×5stories
+79ft-138ft

Overall

21470

Males

12907

M60-64

12907

10K→15K

6.2 - 9.3 mi

Top 79%
×3stories
+67ft-78ft

Overall

20916

Males

12704

M60-64

12704

15K→20K

9.3 - 12.4 mi

Top 76%
×5stories
+106ft-86ft

Overall

20296

Males

12438

M60-64

12438

20K→Half

12.4 - 13.1 mi

Top 79%
×2stories
+19ft-37ft

Overall

20927

Males

12695

M60-64

12695

Half→25K

13.1 - 15.5 mi

Top 85%
×4stories
+66ft-88ft

Overall

22640

Males

13427

M60-64

13427

25K→30K

15.5 - 18.6 mi

Top 73%
×9stories
+181ft-148ft

Overall

19474

Males

11999

M60-64

11999

30K→20M

18.6 - 20.0 mi

Top 72%
×5stories
+64ft-50ft

Overall

19057

Males

11711

M60-64

11711

20M→21M

20.0 - 21.0 mi

Top 66%
×8stories
+106ft-24ft

Overall

17506

Males

11007

M60-64

11007

21M→35K

21.0 - 21.8 mi

Top 65%
×7stories
+17ft-86ft

Overall

17385

Males

10884

M60-64

10884

35K→23M

21.8 - 23.0 mi

Top 63%
×5stories
+23ft-63ft

Overall

16765

Males

10586

M60-64

10586

23M→24M

23.0 - 24.0 mi

Top 63%
×6stories
+12ft-82ft

Overall

16679

Males

10484

M60-64

10484

24M→40K

24.0 - 24.9 mi

Top 60%
×1story
+6ft-20ft

Overall

15859

Males

10080

M60-64

10080

40K→25.2M

24.9 - 25.2 mi

Top 57%
×1story
+13ft-16ft

Overall

15274

Males

9815

M60-64

9815

25.2M→Finish

25.2 - 26.2 mi

Top 54%
×2stories
+22ft-21ft

Overall

14252

Males

9371

M60-64

9371

Passing Analysis

Category:
Athletes Passed
2591
Passed By
692
Net Change
+1899
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#21816
5K → 10K354197+157#21816#21659
10K → 15K30665+241#21659#21418
15K → 20K29046+244#21418#21174
20K → Half3215+17#21174#21157
Half → 25K31332-301#21157#21458
25K → 30K37117+354#21458#21104
30K → 20M1893+186#21104#20918
20M → 21M1925+187#20918#20731
21M → 35K1161+115#20731#20616
35K → 23M2152+213#20616#20403
23M → 24M1353+132#20403#20271
24M → 40K1301+129#20271#20142
40K → 25.2M671+66#20142#20076
25.2M → Finish1634+159#20076#19917
TOTALS2591692+1899
📊

Passing Visuals

Category:
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🔥Passing Intensity

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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