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BOSTON MARATHON 2023

Jan Vleck

Bib: 23546•M

WA

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M70-74)
#0 / 213
Top 18%
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
9:01/mi
28:01
↑ 97↓ 3451.5%
10K· 6.21 mi
8:48/mi
55:21
↑ 79↓ 1380.4%
15K· 9.32 mi
9:06/mi
1:23:36
↑ 67↓ 78
20K· 12.43 mi
9:13/mi
1:52:13
↑ 106↓ 860.1%
Half· 13.11 mi
9:02/mi
1:58:23
↑ 19↓ 370.5%
25K· 15.53 mi
9:04/mi
2:20:23
↑ 66↓ 880.2%
30K· 18.64 mi
9:17/mi
2:49:15
↑ 181↓ 1480.2%
20M
9:09/mi
3:01:41
↑ 64↓ 500.2%
21M
9:38/mi
3:11:19
↑ 106↓ 241.6%
35K· 21.75 mi
9:17/mi
3:18:16
↑ 17↓ 861.7%
23M
9:00/mi
3:29:32
↑ 23↓ 630.6%
24M
8:35/mi
3:38:07
↓ 821.3%
40K· 24.85 mi
8:52/mi
3:45:42
↓ 200.3%
25.2M
9:34/mi
3:49:00
↑ 13↓ 160.2%
Finish· 26.22 mi
8:55/mi
3:58:05
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:58:23
Pace9:02 /mi
2nd Half
Distance13.11 mi
Time1:59:42
Pace9:08 /mi
📊Positive Split: 1.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:25:0428:019:0128:01
9:01
-
10K
6.21 mi11:52:2455:218:5427:20
8:48
-0:13
15K
9.32 mi12:20:391:23:368:5828:15
9:06
+0:18
20K
12.43 mi12:49:161:52:139:0228:37
9:13
+0:07
Half
13.11 mi12:55:261:58:239:026:10
9:02
-0:11
25K
15.53 mi13:17:262:20:239:0222:00
9:04
+0:02
30K
18.64 mi13:46:182:49:159:0528:52
9:17
+0:13
20M
20.00 mi13:58:443:01:419:0512:26
9:09
-0:08
21M
21.00 mi14:08:223:11:199:079:38
9:38
+0:29
35K
21.75 mi14:15:193:18:169:076:57
9:17
-0:21
23M
23.00 mi14:26:353:29:329:0711:16
9:00
-0:17
24M
24.00 mi14:35:103:38:079:058:35
8:35
-0:25
40K
24.85 mi14:42:453:45:429:057:35
8:52
+0:17
25.2M
25.20 mi14:46:033:49:009:053:18
9:34
+0:42
Finish
26.22 mi14:55:083:58:059:059:05
8:55
-0:39

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

8:35 /mi

Average Pace

9:05 /mi

Slowest Pace

9:38 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:45:09

95% of race

Time at Steady Pace

12:56

5% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 9:05 /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 mi11:25:0428:019:0128:01
9:01
#20524
10K
6.21 mi11:52:2455:218:5427:20
8:48
#20236
15K
9.32 mi12:20:391:23:368:5828:15
9:06
#20431
20K
12.43 mi12:49:161:52:139:0228:37
9:13
#20485
Half
13.11 mi12:55:261:58:239:026:10
9:02
#20491
25K
15.53 mi13:17:262:20:239:0222:00
9:04
#20298
30K
18.64 mi13:46:182:49:159:0528:52
9:17
#19962
20M
20.00 mi13:58:443:01:419:0512:26
9:09
#19740
21M
21.00 mi14:08:223:11:199:079:38
9:38
#19547
35K
21.75 mi14:15:193:18:169:076:57
9:17
#19548
23M
23.00 mi14:26:353:29:329:0711:16
9:00
#19346
24M
24.00 mi14:35:103:38:079:058:35
8:35
#19171
40K
24.85 mi14:42:453:45:429:057:35
8:52
#19045
25.2M
25.20 mi14:46:033:49:009:053:18
9:34
#18995
Finish
26.22 mi14:55:083:58:059:059:05
8:55
#18963
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM70-74Seg. OverallSeg. MalesSeg. M70-74
5K3.11 mi3.11 mi20524123721237220911(Top 79%)12699(Top 84%)12699(Top 5962%)
10K6.21 mi3.10 mi20236+28812327+4512327+4519905(Top 75%)12241(Top 81%)12241(Top 5747%)
15K9.32 mi3.11 mi20431-19512432-10512432-10520911(Top 79%)12699(Top 84%)12699(Top 5962%)
20K12.43 mi3.11 mi20485-5412473-4112473-4120611(Top 77%)12575(Top 83%)12575(Top 5904%)
Half13.11 mi0.68 mi20491-612481-812481-820559(Top 77%)12531(Top 83%)12531(Top 5883%)
25K15.53 mi2.42 mi20298+19312406+7512406+7519290(Top 72%)11966(Top 79%)11966(Top 5618%)
30K18.64 mi3.11 mi19962+33612232+17412232+17418582(Top 70%)11598(Top 76%)11598(Top 5445%)
20M20.00 mi1.36 mi19740+22212137+9512137+9517305(Top 65%)10950(Top 72%)10950(Top 5141%)
21M21.00 mi1.00 mi19547+19312041+9612041+9616574(Top 62%)10605(Top 70%)10605(Top 4979%)
35K21.75 mi0.75 mi19548-112036+512036+519093(Top 72%)11632(Top 77%)11632(Top 5461%)
23M23.00 mi1.25 mi19346+20211947+8911947+8916067(Top 60%)10272(Top 68%)10272(Top 4823%)
24M24.00 mi1.00 mi19171+17511863+8411863+8414963(Top 56%)9741(Top 64%)9741(Top 4573%)
40K24.85 mi0.85 mi19045+12611798+6511798+6515452(Top 58%)9885(Top 65%)9885(Top 4641%)
25.2M25.20 mi0.35 mi18995+5011775+2311775+2315488(Top 58%)9909(Top 65%)9909(Top 4652%)
Finish26.22 mi1.02 mi18963+3211750+2511750+2517544(Top 66%)10844(Top 71%)10844(Top 5091%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 79%
×21story building
+97ft-345ft

Overall

20911

Males

12699

M70-74

12699

5K→10K

3.1 - 6.2 mi

Top 75%
×5story building
+79ft-138ft

Overall

19905

Males

12241

M70-74

12241

10K→15K

6.2 - 9.3 mi

Top 79%
×3story building
+67ft-78ft

Overall

20911

Males

12699

M70-74

12699

15K→20K

9.3 - 12.4 mi

Top 77%
×5story building
+106ft-86ft

Overall

20611

Males

12575

M70-74

12575

20K→Half

12.4 - 13.1 mi

Top 77%
×2story building
+19ft-37ft

Overall

20559

Males

12531

M70-74

12531

Half→25K

13.1 - 15.5 mi

Top 72%
×4story building
+66ft-88ft

Overall

19290

Males

11966

M70-74

11966

25K→30K

15.5 - 18.6 mi

Top 70%
×9story building
+181ft-148ft

Overall

18582

Males

11598

M70-74

11598

30K→20M

18.6 - 20.0 mi

Top 65%
×5story building
+64ft-50ft

Overall

17305

Males

10950

M70-74

10950

20M→21M

20.0 - 21.0 mi

Top 62%
×8story building
+106ft-24ft

Overall

16574

Males

10605

M70-74

10605

21M→35K

21.0 - 21.8 mi

Top 72%
×7story building
+17ft-86ft

Overall

19093

Males

11632

M70-74

11632

35K→23M

21.8 - 23.0 mi

Top 60%
×5story building
+23ft-63ft

Overall

16067

Males

10272

M70-74

10272

23M→24M

23.0 - 24.0 mi

Top 56%
×6story building
+12ft-82ft

Overall

14963

Males

9741

M70-74

9741

24M→40K

24.0 - 24.9 mi

Top 58%
×1story
+6ft-20ft

Overall

15452

Males

9885

M70-74

9885

40K→25.2M

24.9 - 25.2 mi

Top 58%
×1story
+13ft-16ft

Overall

15488

Males

9909

M70-74

9909

25.2M→Finish

25.2 - 26.2 mi

Top 66%
×2story building
+22ft-21ft

Overall

17544

Males

10844

M70-74

10844

Passing Analysis

Category:
Athletes Passed
2451
Passed By
890
Net Change
+1561
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#20524
5K → 10K486198+288#20524#20236
10K → 15K113308-195#20236#20431
15K → 20K143197-54#20431#20485
20K → Half2733-6#20485#20491
Half → 25K22633+193#20491#20298
25K → 30K35519+336#20298#19962
30K → 20M2220+222#19962#19740
20M → 21M1996+193#19740#19547
21M → 35K4243-1#19547#19548
35K → 23M2108+202#19548#19346
23M → 24M1794+175#19346#19171
24M → 40K1315+126#19171#19045
40K → 25.2M588+50#19045#18995
25.2M → Finish6028+32#18995#18963
TOTALS2451890+1561
📊

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