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BOSTON MARATHON 2023

Jack Duysen

Bib: 21337•M

IA

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
26:50
Rank: #18451
Start → 5K
26:50 | 8:38/mi
10K· 6.21 mi
53:48
Rank: #18853 (-402)
5K → 10K
26:58 | 8:41/mi
15K· 9.32 mi
1:20:56
Rank: #18951 (-98)
10K → 15K
27:08 | 8:44/mi
20K· 12.43 mi
1:48:26
Rank: #18920 (+31)
15K → 20K
27:30 | 8:51/mi
Half· 13.11 mi
1:54:21
Rank: #18931 (-11)
20K → Half
5:55 | 8:40/mi
25K· 15.53 mi
2:15:51
Rank: #18827 (+104)
Half → 25K
21:30 | 8:52/mi
30K· 18.64 mi
2:44:00
Rank: #18566 (+261)
25K → 30K
28:09 | 9:04/mi
20M
2:56:20
Rank: #18429 (+137)
30K → 20M
12:20 | 9:05/mi
21M
3:05:52
Rank: #18278 (+151)
20M → 21M
9:32 | 9:32/mi
35K· 21.75 mi
3:12:10
Rank: #18142 (+136)
21M → 35K
6:18 | 8:25/mi
23M
3:22:58
Rank: #17912 (+230)
35K → 23M
10:48 | 8:38/mi
24M
3:31:31
Rank: #17787 (+125)
23M → 24M
8:33 | 8:33/mi
40K· 24.85 mi
3:39:01
Rank: #17687 (+100)
24M → 40K
7:30 | 8:46/mi
25.2M
3:42:16
Rank: #17643 (+44)
40K → 25.2M
3:15 | 9:25/mi
Finish· 26.22 mi
3:51:00
Rank: #17565 (+78)
25.2M → Finish
8:44 | 8:34/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:54:21
Pace8:43 /mi
2nd Half
Distance13.11 mi
Time1:56:39
Pace8:54 /mi
📊Positive Split: 2.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:30:2026:508:3826:50
8:38
-
10K
6.21 mi11:57:1853:488:3926:58
8:41
+0:03
15K
9.32 mi12:24:261:20:568:4127:08
8:44
+0:03
20K
12.43 mi12:51:561:48:268:4427:30
8:51
+0:07
Half
13.11 mi12:57:511:54:218:435:55
8:40
-0:11
25K
15.53 mi13:19:212:15:518:4521:30
8:52
+0:12
30K
18.64 mi13:47:302:44:008:4828:09
9:04
+0:12
20M
20.00 mi13:59:502:56:208:4912:20
9:05
+0:01
21M
21.00 mi14:09:223:05:528:519:32
9:32
+0:27
35K
21.75 mi14:15:403:12:108:506:18
8:25
-1:07
23M
23.00 mi14:26:283:22:588:4910:48
8:38
+0:13
24M
24.00 mi14:35:013:31:318:498:33
8:33
-0:05
40K
24.85 mi14:42:313:39:018:497:30
8:46
+0:13
25.2M
25.20 mi14:45:463:42:168:493:15
9:25
+0:39
Finish
26.22 mi14:54:303:51:008:498:44
8:34
-0:51

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

8:25 /mi

Average Pace

8:49 /mi

Slowest Pace

9:32 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:38:13

94% of race

Time at Steady Pace

12:47

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:49 /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 mi11:30:2026:508:3826:50
8:38
#18451
10K
6.21 mi11:57:1853:488:3926:58
8:41
#18853
15K
9.32 mi12:24:261:20:568:4127:08
8:44
#18951
20K
12.43 mi12:51:561:48:268:4427:30
8:51
#18920
Half
13.11 mi12:57:511:54:218:435:55
8:40
#18931
25K
15.53 mi13:19:212:15:518:4521:30
8:52
#18827
30K
18.64 mi13:47:302:44:008:4828:09
9:04
#18566
20M
20.00 mi13:59:502:56:208:4912:20
9:05
#18429
21M
21.00 mi14:09:223:05:528:519:32
9:32
#18278
35K
21.75 mi14:15:403:12:108:506:18
8:25
#18142
23M
23.00 mi14:26:283:22:588:4910:48
8:38
#17912
24M
24.00 mi14:35:013:31:318:498:33
8:33
#17787
40K
24.85 mi14:42:313:39:018:497:30
8:46
#17687
25.2M
25.20 mi14:45:463:42:168:493:15
9:25
#17643
Finish
26.22 mi14:54:303:51:008:498:44
8:34
#17565
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM60-64Seg. OverallSeg. MalesSeg. M60-64
5K3.11 mi3.11 mi18451115851158519142(Top 72%)11932(Top 79%)11932(Top 1075%)
10K6.21 mi3.10 mi18853-40211785-20011785-20019299(Top 72%)12012(Top 79%)12012(Top 1082%)
15K9.32 mi3.11 mi18951-9811829-4411829-4419142(Top 72%)11932(Top 79%)11932(Top 1075%)
20K12.43 mi3.11 mi18920+3111822+711822+718945(Top 71%)11866(Top 78%)11866(Top 1069%)
Half13.11 mi0.68 mi18931-1111830-811830-818731(Top 70%)11786(Top 78%)11786(Top 1062%)
25K15.53 mi2.42 mi18827+10411781+4911781+4918302(Top 69%)11552(Top 76%)11552(Top 1041%)
30K18.64 mi3.11 mi18566+26111643+13811643+13817486(Top 66%)11119(Top 73%)11119(Top 1002%)
20M20.00 mi1.36 mi18429+13711581+6211581+6216910(Top 64%)10792(Top 71%)10792(Top 972%)
21M21.00 mi1.00 mi18278+15111492+8911492+8916106(Top 60%)10403(Top 69%)10403(Top 937%)
35K21.75 mi0.75 mi18142+13611432+6011432+6014844(Top 56%)9824(Top 65%)9824(Top 885%)
23M23.00 mi1.25 mi17912+23011326+10611326+10613935(Top 52%)9349(Top 62%)9349(Top 842%)
24M24.00 mi1.00 mi17787+12511268+5811268+5814765(Top 55%)9656(Top 64%)9656(Top 870%)
40K24.85 mi0.85 mi17687+10011215+5311215+5314928(Top 56%)9662(Top 64%)9662(Top 870%)
25.2M25.20 mi0.35 mi17643+4411191+2411191+2414802(Top 56%)9606(Top 63%)9606(Top 865%)
Finish26.22 mi1.02 mi17565+7811148+4311148+4315813(Top 59%)10097(Top 67%)10097(Top 910%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 72%
×21stories
+97ft-345ft

Overall

19142

Males

11932

M60-64

11932

5K→10K

3.1 - 6.2 mi

Top 72%
×5stories
+79ft-138ft

Overall

19299

Males

12012

M60-64

12012

10K→15K

6.2 - 9.3 mi

Top 72%
×3stories
+67ft-78ft

Overall

19142

Males

11932

M60-64

11932

15K→20K

9.3 - 12.4 mi

Top 71%
×5stories
+106ft-86ft

Overall

18945

Males

11866

M60-64

11866

20K→Half

12.4 - 13.1 mi

Top 70%
×2stories
+19ft-37ft

Overall

18731

Males

11786

M60-64

11786

Half→25K

13.1 - 15.5 mi

Top 69%
×4stories
+66ft-88ft

Overall

18302

Males

11552

M60-64

11552

25K→30K

15.5 - 18.6 mi

Top 66%
×9stories
+181ft-148ft

Overall

17486

Males

11119

M60-64

11119

30K→20M

18.6 - 20.0 mi

Top 64%
×5stories
+64ft-50ft

Overall

16910

Males

10792

M60-64

10792

20M→21M

20.0 - 21.0 mi

Top 60%
×8stories
+106ft-24ft

Overall

16106

Males

10403

M60-64

10403

21M→35K

21.0 - 21.8 mi

Top 56%
×7stories
+17ft-86ft

Overall

14844

Males

9824

M60-64

9824

35K→23M

21.8 - 23.0 mi

Top 52%
×5stories
+23ft-63ft

Overall

13935

Males

9349

M60-64

9349

23M→24M

23.0 - 24.0 mi

Top 55%
×6stories
+12ft-82ft

Overall

14765

Males

9656

M60-64

9656

24M→40K

24.0 - 24.9 mi

Top 56%
×1story
+6ft-20ft

Overall

14928

Males

9662

M60-64

9662

40K→25.2M

24.9 - 25.2 mi

Top 56%
×1story
+13ft-16ft

Overall

14802

Males

9606

M60-64

9606

25.2M→Finish

25.2 - 26.2 mi

Top 59%
×2stories
+22ft-21ft

Overall

15813

Males

10097

M60-64

10097

Passing Analysis

Category:
Athletes Passed
2130
Passed By
1244
Net Change
+886
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#18451
5K → 10K170572-402#18451#18853
10K → 15K141239-98#18853#18951
15K → 20K179148+31#18951#18920
20K → Half3041-11#18920#18931
Half → 25K16864+104#18931#18827
25K → 30K31251+261#18827#18566
30K → 20M16629+137#18566#18429
20M → 21M17221+151#18429#18278
21M → 35K1437+136#18278#18142
35K → 23M2377+230#18142#17912
23M → 24M13611+125#17912#17787
24M → 40K11515+100#17787#17687
40K → 25.2M528+44#17687#17643
25.2M → Finish10931+78#17643#17565
TOTALS21301244+886
📊

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