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BOSTON MARATHON 2023

David Spencer

Bib: 23498•M

IL

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M65-69)
#0 / 549
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
27:15
Rank: #19292
Start → 5K
8:46/mi
27:15 split
10K· 6.21 mi
54:38
Rank: #19630 (-338)
5K → 10K
8:49/mi
27:23 split
15K· 9.32 mi
1:22:52
Rank: #20073 (-443)
10K → 15K
9:05/mi
28:14 split
20K· 12.43 mi
1:52:37
Rank: #20622 (-549)
15K → 20K
9:35/mi
29:45 split
Half· 13.11 mi
1:59:03
Rank: #20690 (-68)
20K → Half
9:26/mi
6:26 split
25K· 15.53 mi
2:21:42
Rank: #20648 (+42)
Half → 25K
9:21/mi
22:39 split
30K· 18.64 mi
2:52:04
Rank: #20564 (+84)
25K → 30K
9:46/mi
30:22 split
20M
3:05:47
Rank: #20578 (-14)
30K → 20M
10:06/mi
13:43 split
21M
3:17:18
Rank: #20668 (-90)
20M → 21M
11:31/mi
11:31 split
35K· 21.75 mi
3:24:28
Rank: #20638 (+30)
21M → 35K
9:35/mi
7:10 split
23M
3:37:35
Rank: #20665 (-27)
35K → 23M
10:29/mi
13:07 split
24M
3:47:26
Rank: #20653 (+12)
23M → 24M
9:51/mi
9:51 split
40K· 24.85 mi
3:56:11
Rank: #20644 (+9)
24M → 40K
10:14/mi
8:45 split
25.2M
3:59:58
Rank: #20639 (+5)
40K → 25.2M
10:58/mi
3:47 split
Finish· 26.22 mi
4:10:06
Rank: #20670 (-31)
25.2M → Finish
9:57/mi
10:08 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:59:03
Pace9:05 /mi
2nd Half
Distance13.11 mi
Time2:11:03
Pace10:00 /mi
📊Positive Split: 10.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:22:4227:158:4627:15
8:46
-
10K
6.21 mi11:50:0554:388:4827:23
8:49
+0:03
15K
9.32 mi12:18:191:22:528:5328:14
9:05
+0:16
20K
12.43 mi12:48:041:52:379:0429:45
9:35
+0:30
Half
13.11 mi12:54:301:59:039:056:26
9:26
-0:09
25K
15.53 mi13:17:092:21:429:0722:39
9:21
-0:05
30K
18.64 mi13:47:312:52:049:1430:22
9:46
+0:25
20M
20.00 mi14:01:143:05:479:1713:43
10:06
+0:20
21M
21.00 mi14:12:453:17:189:2411:31
11:31
+1:25
35K
21.75 mi14:19:553:24:289:247:10
9:35
-1:56
23M
23.00 mi14:33:023:37:359:2813:07
10:29
+0:54
24M
24.00 mi14:42:533:47:269:299:51
9:51
-0:38
40K
24.85 mi14:51:383:56:119:308:45
10:14
+0:23
25.2M
25.20 mi14:55:253:59:589:313:47
10:58
+0:44
Finish
26.22 mi15:05:334:10:069:3310:08
9:57
-1:01

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

8:46 /mi

Average Pace

9:33 /mi

Slowest Pace

11:31 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:45:31

42% of race

Time at Steady Pace

1:47:25

43% of race

Time at Slower Pace

37:10

15% of race

Average Pace: 9:32 /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 mi11:22:4227:158:4627:15
8:46
#19292
10K
6.21 mi11:50:0554:388:4827:23
8:49
#19630
15K
9.32 mi12:18:191:22:528:5328:14
9:05
#20073
20K
12.43 mi12:48:041:52:379:0429:45
9:35
#20622
Half
13.11 mi12:54:301:59:039:056:26
9:26
#20690
25K
15.53 mi13:17:092:21:429:0722:39
9:21
#20648
30K
18.64 mi13:47:312:52:049:1430:22
9:46
#20564
20M
20.00 mi14:01:143:05:479:1713:43
10:06
#20578
21M
21.00 mi14:12:453:17:189:2411:31
11:31
#20668
35K
21.75 mi14:19:553:24:289:247:10
9:35
#20638
23M
23.00 mi14:33:023:37:359:2813:07
10:29
#20665
24M
24.00 mi14:42:533:47:269:299:51
9:51
#20653
40K
24.85 mi14:51:383:56:119:308:45
10:14
#20644
25.2M
25.20 mi14:55:253:59:589:313:47
10:58
#20639
Finish
26.22 mi15:05:334:10:069:3310:08
9:57
#20670
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM65-69Seg. OverallSeg. MalesSeg. M65-69
5K3.11 mi3.11 mi19292118901189020894(Top 78%)12691(Top 84%)12691(Top 2312%)
10K6.21 mi3.10 mi19630-33812059-16912059-16919999(Top 75%)12281(Top 81%)12281(Top 2237%)
15K9.32 mi3.11 mi20073-44312273-21412273-21420894(Top 78%)12691(Top 84%)12691(Top 2312%)
20K12.43 mi3.11 mi20622-54912534-26112534-26121774(Top 82%)13082(Top 86%)13082(Top 2383%)
Half13.11 mi0.68 mi20690-6812569-3512569-3521876(Top 82%)13128(Top 87%)13128(Top 2391%)
25K15.53 mi2.42 mi20648+4212558+1112558+1120323(Top 76%)12420(Top 82%)12420(Top 2262%)
30K18.64 mi3.11 mi20564+8412500+5812500+5820376(Top 77%)12371(Top 82%)12371(Top 2253%)
20M20.00 mi1.36 mi20578-1412494+612494+620725(Top 78%)12440(Top 82%)12440(Top 2266%)
21M21.00 mi1.00 mi20668-9012529-3512529-3521901(Top 82%)12935(Top 85%)12935(Top 2356%)
35K21.75 mi0.75 mi20638+3012508+2112508+2120079(Top 75%)12080(Top 80%)12080(Top 2200%)
23M23.00 mi1.25 mi20665-2712498+1012498+1021251(Top 80%)12577(Top 83%)12577(Top 2291%)
24M24.00 mi1.00 mi20653+1212480+1812480+1820370(Top 77%)12159(Top 80%)12159(Top 2215%)
40K24.85 mi0.85 mi20644+912468+1212468+1220565(Top 77%)12182(Top 80%)12182(Top 2219%)
25.2M25.20 mi0.35 mi20639+512462+612462+620370(Top 77%)12097(Top 80%)12097(Top 2203%)
Finish26.22 mi1.02 mi20670-3112465-312465-321599(Top 81%)12668(Top 83%)12668(Top 2307%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 78%
×21stories
+97ft-345ft

Overall

20894

Males

12691

M65-69

12691

5K→10K

3.1 - 6.2 mi

Top 75%
×5stories
+79ft-138ft

Overall

19999

Males

12281

M65-69

12281

10K→15K

6.2 - 9.3 mi

Top 78%
×3stories
+67ft-78ft

Overall

20894

Males

12691

M65-69

12691

15K→20K

9.3 - 12.4 mi

Top 82%
×5stories
+106ft-86ft

Overall

21774

Males

13082

M65-69

13082

20K→Half

12.4 - 13.1 mi

Top 82%
×2stories
+19ft-37ft

Overall

21876

Males

13128

M65-69

13128

Half→25K

13.1 - 15.5 mi

Top 76%
×4stories
+66ft-88ft

Overall

20323

Males

12420

M65-69

12420

25K→30K

15.5 - 18.6 mi

Top 77%
×9stories
+181ft-148ft

Overall

20376

Males

12371

M65-69

12371

30K→20M

18.6 - 20.0 mi

Top 78%
×5stories
+64ft-50ft

Overall

20725

Males

12440

M65-69

12440

20M→21M

20.0 - 21.0 mi

Top 82%
×8stories
+106ft-24ft

Overall

21901

Males

12935

M65-69

12935

21M→35K

21.0 - 21.8 mi

Top 75%
×7stories
+17ft-86ft

Overall

20079

Males

12080

M65-69

12080

35K→23M

21.8 - 23.0 mi

Top 80%
×5stories
+23ft-63ft

Overall

21251

Males

12577

M65-69

12577

23M→24M

23.0 - 24.0 mi

Top 77%
×6stories
+12ft-82ft

Overall

20370

Males

12159

M65-69

12159

24M→40K

24.0 - 24.9 mi

Top 77%
×1story
+6ft-20ft

Overall

20565

Males

12182

M65-69

12182

40K→25.2M

24.9 - 25.2 mi

Top 77%
×1story
+13ft-16ft

Overall

20370

Males

12097

M65-69

12097

25.2M→Finish

25.2 - 26.2 mi

Top 81%
×2stories
+22ft-21ft

Overall

21599

Males

12668

M65-69

12668

Passing Analysis

Category:
Athletes Passed
985
Passed By
2363
Net Change
-1378
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#19292
5K → 10K181519-338#19292#19630
10K → 15K49492-443#19630#20073
15K → 20K51600-549#20073#20622
20K → Half876-68#20622#20690
Half → 25K12987+42#20690#20648
25K → 30K185101+84#20648#20564
30K → 20M6781-14#20564#20578
20M → 21M51141-90#20578#20668
21M → 35K5525+30#20668#20638
35K → 23M6390-27#20638#20665
23M → 24M5139+12#20665#20653
24M → 40K4637+9#20653#20644
40K → 25.2M2015+5#20644#20639
25.2M → Finish2960-31#20639#20670
TOTALS9852363-1378
📊

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