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BOSTON MARATHON 2023

John Casterline

Bib: 15735 M US

AL

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

Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
469 ft elev
5K· 3.11 mi
8:51/mi
27:29
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
8:38/mi
54:18
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
8:41/mi
1:21:18
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
8:46/mi
1:48:32
↑ 106↓ 860.1%
165 ft elev
Half· 13.11 mi
8:45/mi
1:54:30
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
8:47/mi
2:15:48
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
9:06/mi
2:44:03
↑ 181↓ 1480.2%
138 ft elev
20M
9:13/mi
2:56:35
↑ 64↓ 500.2%
148 ft elev
21M
9:47/mi
3:06:22
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
9:11/mi
3:13:14
↑ 17↓ 861.7%
156 ft elev
23M
9:15/mi
3:24:49
↑ 23↓ 630.6%
116 ft elev
24M
9:05/mi
3:33:54
↓ 821.3%
34 ft elev
40K· 24.85 mi
9:26/mi
3:41:58
↓ 200.3%
20 ft elev
25.2M
10:55/mi
3:45:44
↑ 13↓ 160.2%
18 ft elev
Finish· 26.22 mi
10:14/mi
3:56:10
↑ 22↓ 21
17 ft elev
Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:54:30
Pace8:44 /mi
2nd Half
Distance13.11 mi
Time2:01:40
Pace9:17 /mi
📊Positive Split: 6.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:58:0627:298:5127:29
8:51
-
10K
6.21 mi11:24:5554:188:4426:49
8:38
-0:13
15K
9.32 mi11:51:551:21:188:4327:00
8:41
+0:03
20K
12.43 mi12:19:091:48:328:4427:14
8:46
+0:05
Half
13.11 mi12:25:071:54:308:445:58
8:45
-0:01
25K
15.53 mi12:46:252:15:488:4521:18
8:47
+0:02
30K
18.64 mi13:14:402:44:038:4828:15
9:06
+0:19
20M
20.00 mi13:27:122:56:358:5012:32
9:13
+0:07
21M
21.00 mi13:36:593:06:228:529:47
9:47
+0:34
35K
21.75 mi13:43:513:13:148:536:52
9:11
-0:36
23M
23.00 mi13:55:263:24:498:5411:35
9:15
+0:04
24M
24.00 mi14:04:313:33:548:559:05
9:05
-0:10
40K
24.85 mi14:12:353:41:588:568:04
9:26
+0:21
25.2M
25.20 mi14:16:213:45:448:573:46
10:55
+1:29
Finish
26.22 mi14:26:473:56:109:0110:26
10:14
-0:41

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

8:38 /mi

Average Pace

9:01 /mi

Slowest Pace

10:55 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:48:19

46% of race

Time at Steady Pace

1:35:48

41% of race

Time at Slower Pace

32:03

14% of race

Average Pace: 9:00 /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 mi10:58:0627:298:5127:29
8:51
#19705
10K
6.21 mi11:24:5554:188:4426:49
8:38
#19341
15K
9.32 mi11:51:551:21:188:4327:00
8:41
#19171
20K
12.43 mi12:19:091:48:328:4427:14
8:46
#18975
Half
13.11 mi12:25:071:54:308:445:58
8:45
#18990
25K
15.53 mi12:46:252:15:488:4521:18
8:47
#18810
30K
18.64 mi13:14:402:44:038:4828:15
9:06
#18585
20M
20.00 mi13:27:122:56:358:5012:32
9:13
#18488
21M
21.00 mi13:36:593:06:228:529:47
9:47
#18393
35K
21.75 mi13:43:513:13:148:536:52
9:11
#18400
23M
23.00 mi13:55:263:24:498:5411:35
9:15
#18329
24M
24.00 mi14:04:313:33:548:559:05
9:05
#18305
40K
24.85 mi14:12:353:41:588:568:04
9:26
#18308
25.2M
25.20 mi14:16:213:45:448:573:46
10:55
#18361
Finish
26.22 mi14:26:473:56:109:0110:26
10:14
#18591
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM60-64Seg. OverallSeg. MalesSeg. M60-64
5K3.11 mi3.11 mi19705120431204318917(Top 71%)11843(Top 78%)11843(Top 1067%)
10K6.21 mi3.10 mi19341+36411958+8511958+8519010(Top 71%)11905(Top 78%)11905(Top 1073%)
15K9.32 mi3.11 mi19171+17011914+4411914+4418917(Top 71%)11843(Top 78%)11843(Top 1067%)
20K12.43 mi3.11 mi18975+19611850+6411850+6418483(Top 69%)11678(Top 77%)11678(Top 1052%)
Half13.11 mi0.68 mi18990-15118501185019154(Top 72%)11951(Top 79%)11951(Top 1077%)
25K15.53 mi2.42 mi18810+18011774+7611774+7617866(Top 67%)11349(Top 75%)11349(Top 1022%)
30K18.64 mi3.11 mi18585+22511653+12111653+12117650(Top 66%)11190(Top 74%)11190(Top 1008%)
20M20.00 mi1.36 mi18488+9711609+4411609+4417653(Top 66%)11083(Top 73%)11083(Top 998%)
21M21.00 mi1.00 mi18393+9511550+5911550+5917186(Top 65%)10872(Top 72%)10872(Top 979%)
35K21.75 mi0.75 mi18400-711544+611544+618643(Top 70%)11436(Top 75%)11436(Top 1030%)
23M23.00 mi1.25 mi18329+7111500+4411500+4417298(Top 65%)10827(Top 71%)10827(Top 975%)
24M24.00 mi1.00 mi18305+2411480+2011480+2017584(Top 66%)10891(Top 72%)10891(Top 981%)
40K24.85 mi0.85 mi18308-311470+1011470+1018079(Top 68%)11075(Top 73%)11075(Top 998%)
25.2M25.20 mi0.35 mi18361-5311493-2311493-2320244(Top 76%)12033(Top 79%)12033(Top 1084%)
Finish26.22 mi1.02 mi18591-23011581-8811581-8822381(Top 84%)13038(Top 86%)13038(Top 1175%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 71%
×21story building
+97ft-345ft

Overall

18917

Males

11843

M60-64

11843

5K→10K

3.1 - 6.2 mi

Top 71%
×5story building
+79ft-138ft

Overall

19010

Males

11905

M60-64

11905

10K→15K

6.2 - 9.3 mi

Top 71%
×3story building
+67ft-78ft

Overall

18917

Males

11843

M60-64

11843

15K→20K

9.3 - 12.4 mi

Top 69%
×5story building
+106ft-86ft

Overall

18483

Males

11678

M60-64

11678

20K→Half

12.4 - 13.1 mi

Top 72%
×2story building
+19ft-37ft

Overall

19154

Males

11951

M60-64

11951

Half→25K

13.1 - 15.5 mi

Top 67%
×4story building
+66ft-88ft

Overall

17866

Males

11349

M60-64

11349

25K→30K

15.5 - 18.6 mi

Top 66%
×9story building
+181ft-148ft

Overall

17650

Males

11190

M60-64

11190

30K→20M

18.6 - 20.0 mi

Top 66%
×5story building
+64ft-50ft

Overall

17653

Males

11083

M60-64

11083

20M→21M

20.0 - 21.0 mi

Top 65%
×8story building
+106ft-24ft

Overall

17186

Males

10872

M60-64

10872

21M→35K

21.0 - 21.8 mi

Top 70%
×7story building
+17ft-86ft

Overall

18643

Males

11436

M60-64

11436

35K→23M

21.8 - 23.0 mi

Top 65%
×5story building
+23ft-63ft

Overall

17298

Males

10827

M60-64

10827

23M→24M

23.0 - 24.0 mi

Top 66%
×6story building
+12ft-82ft

Overall

17584

Males

10891

M60-64

10891

24M→40K

24.0 - 24.9 mi

Top 68%
×1story
+6ft-20ft

Overall

18079

Males

11075

M60-64

11075

40K→25.2M

24.9 - 25.2 mi

Top 76%
×1story
+13ft-16ft

Overall

20244

Males

12033

M60-64

12033

25.2M→Finish

25.2 - 26.2 mi

Top 84%
×2story building
+22ft-21ft

Overall

22381

Males

13038

M60-64

13038

Passing Analysis

Category:
Athletes Passed
2190
Passed By
1076
Net Change
+1114
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#19705
5K → 10K560196+364#19705#19341
10K → 15K282112+170#19341#19171
15K → 20K26670+196#19171#18975
20K → Half2136-15#18975#18990
Half → 25K21535+180#18990#18810
25K → 30K28863+225#18810#18585
30K → 20M13942+97#18585#18488
20M → 21M13136+95#18488#18393
21M → 35K4754-7#18393#18400
35K → 23M11039+71#18400#18329
23M → 24M6339+24#18329#18305
24M → 40K4952-3#18305#18308
40K → 25.2M1063-53#18308#18361
25.2M → Finish9239-230#18361#18591
TOTALS21901076+1114
📊

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