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BOSTON MARATHON 2023

Jason Nieuwsma

Bib: 4061•M

NC

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 14%
Gender (Male)
#0 / 15176
Top 23%
Masters (Masters Men)
#0 / 9891
Top 10%
Division (M40-44)
#0 / 2241
Top 26%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:57
Rank: #4061
Start → 5K
20:57 | 6:45/mi
10K· 6.21 mi
41:36
Rank: #3926 (+135)
5K → 10K
20:39 | 6:39/mi
15K· 9.32 mi
1:02:09
Rank: #3698 (+228)
10K → 15K
20:33 | 6:37/mi
20K· 12.43 mi
1:22:58
Rank: #3653 (+45)
15K → 20K
20:49 | 6:42/mi
Half· 13.11 mi
1:27:30
Rank: #3663 (-10)
20K → Half
4:32 | 6:39/mi
25K· 15.53 mi
1:43:58
Rank: #3709 (-46)
Half → 25K
16:28 | 6:47/mi
30K· 18.64 mi
2:05:27
Rank: #3683 (+26)
25K → 30K
21:29 | 6:55/mi
20M
2:14:57
Rank: #3672 (+11)
30K → 20M
9:30 | 6:59/mi
21M
2:22:13
Rank: #3636 (+36)
20M → 21M
7:16 | 7:16/mi
35K· 21.75 mi
2:27:13
Rank: #3617 (+19)
21M → 35K
5:00 | 6:41/mi
23M
2:35:58
Rank: #3577 (+40)
35K → 23M
8:45 | 6:59/mi
24M
2:42:54
Rank: #3617 (-40)
23M → 24M
6:56 | 6:56/mi
40K· 24.85 mi
2:49:02
Rank: #3657 (-40)
24M → 40K
6:08 | 7:10/mi
25.2M
2:51:40
Rank: #3678 (-21)
40K → 25.2M
2:38 | 7:38/mi
Finish· 26.22 mi
2:58:36
Rank: #3699 (-21)
25.2M → Finish
6:56 | 6:48/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:27:30
Pace6:40 /mi
2nd Half
Distance13.11 mi
Time1:31:06
Pace6:57 /mi
📊Positive Split: 4.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:23:0020:576:4520:57
6:45
-
10K
6.21 mi10:43:3941:366:4220:39
6:39
-0:06
15K
9.32 mi11:04:121:02:096:4020:33
6:37
-0:02
20K
12.43 mi11:25:011:22:586:4120:49
6:42
+0:05
Half
13.11 mi11:29:331:27:306:404:32
6:39
-0:03
25K
15.53 mi11:46:011:43:586:4216:28
6:47
+0:08
30K
18.64 mi12:07:302:05:276:4421:29
6:55
+0:08
20M
20.00 mi12:17:002:14:576:459:30
6:59
+0:04
21M
21.00 mi12:24:162:22:136:467:16
7:16
+0:17
35K
21.75 mi12:29:162:27:136:465:00
6:41
-0:35
23M
23.00 mi12:38:012:35:586:478:45
6:59
+0:18
24M
24.00 mi12:44:572:42:546:476:56
6:56
-0:03
40K
24.85 mi12:51:052:49:026:486:08
7:10
+0:14
25.2M
25.20 mi12:53:432:51:406:492:38
7:38
+0:28
Finish
26.22 mi13:00:392:58:366:496:56
6:48
-0:50

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

6:37 /mi

Average Pace

6:49 /mi

Slowest Pace

7:38 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:55:58

99% of race

Time at Steady Pace

2:38

1% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:49 /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 mi10:23:0020:576:4520:57
6:45
#4061
10K
6.21 mi10:43:3941:366:4220:39
6:39
#3926
15K
9.32 mi11:04:121:02:096:4020:33
6:37
#3698
20K
12.43 mi11:25:011:22:586:4120:49
6:42
#3653
Half
13.11 mi11:29:331:27:306:404:32
6:39
#3663
25K
15.53 mi11:46:011:43:586:4216:28
6:47
#3709
30K
18.64 mi12:07:302:05:276:4421:29
6:55
#3683
20M
20.00 mi12:17:002:14:576:459:30
6:59
#3672
21M
21.00 mi12:24:162:22:136:467:16
7:16
#3636
35K
21.75 mi12:29:162:27:136:465:00
6:41
#3617
23M
23.00 mi12:38:012:35:586:478:45
6:59
#3577
24M
24.00 mi12:44:572:42:546:476:56
6:56
#3617
40K
24.85 mi12:51:052:49:026:486:08
7:10
#3657
25.2M
25.20 mi12:53:432:51:406:492:38
7:38
#3678
Finish
26.22 mi13:00:392:58:366:496:56
6:48
#3699
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi4061380838083413(Top 13%)3238(Top 21%)3238(Top 144%)
10K6.21 mi3.10 mi3926+1353696+1123696+1123859(Top 14%)3636(Top 24%)3636(Top 162%)
15K9.32 mi3.11 mi3698+2283492+2043492+2043413(Top 13%)3238(Top 21%)3238(Top 144%)
20K12.43 mi3.11 mi3653+453457+353457+353585(Top 13%)3392(Top 22%)3392(Top 151%)
Half13.11 mi0.68 mi3663-103465-83465-83794(Top 14%)3578(Top 24%)3578(Top 160%)
25K15.53 mi2.42 mi3709-463506-413506-414064(Top 15%)3810(Top 25%)3810(Top 170%)
30K18.64 mi3.11 mi3683+263479+273479+273754(Top 14%)3520(Top 23%)3520(Top 157%)
20M20.00 mi1.36 mi3672+113468+113468+113963(Top 15%)3679(Top 24%)3679(Top 164%)
21M21.00 mi1.00 mi3636+363438+303438+303450(Top 13%)3208(Top 21%)3208(Top 143%)
35K21.75 mi0.75 mi3617+193417+213417+213464(Top 13%)3216(Top 21%)3216(Top 144%)
23M23.00 mi1.25 mi3577+403379+383379+383716(Top 14%)3430(Top 23%)3430(Top 153%)
24M24.00 mi1.00 mi3617-403413-343413-344319(Top 16%)3911(Top 26%)3911(Top 175%)
40K24.85 mi0.85 mi3657-403442-293442-294713(Top 18%)4140(Top 27%)4140(Top 185%)
25.2M25.20 mi0.35 mi3678-213460-183460-184496(Top 17%)3909(Top 26%)3909(Top 174%)
Finish26.22 mi1.02 mi3699-213474-143474-144075(Top 15%)3596(Top 24%)3596(Top 160%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 13%
×21stories
+97ft-345ft

Overall

3413

Males

3238

M40-44

3238

5K→10K

3.1 - 6.2 mi

Top 14%
×5stories
+79ft-138ft

Overall

3859

Males

3636

M40-44

3636

10K→15K

6.2 - 9.3 mi

Top 13%
×3stories
+67ft-78ft

Overall

3413

Males

3238

M40-44

3238

15K→20K

9.3 - 12.4 mi

Top 13%
×5stories
+106ft-86ft

Overall

3585

Males

3392

M40-44

3392

20K→Half

12.4 - 13.1 mi

Top 14%
×2stories
+19ft-37ft

Overall

3794

Males

3578

M40-44

3578

Half→25K

13.1 - 15.5 mi

Top 15%
×4stories
+66ft-88ft

Overall

4064

Males

3810

M40-44

3810

25K→30K

15.5 - 18.6 mi

Top 14%
×9stories
+181ft-148ft

Overall

3754

Males

3520

M40-44

3520

30K→20M

18.6 - 20.0 mi

Top 15%
×5stories
+64ft-50ft

Overall

3963

Males

3679

M40-44

3679

20M→21M

20.0 - 21.0 mi

Top 13%
×8stories
+106ft-24ft

Overall

3450

Males

3208

M40-44

3208

21M→35K

21.0 - 21.8 mi

Top 13%
×7stories
+17ft-86ft

Overall

3464

Males

3216

M40-44

3216

35K→23M

21.8 - 23.0 mi

Top 14%
×5stories
+23ft-63ft

Overall

3716

Males

3430

M40-44

3430

23M→24M

23.0 - 24.0 mi

Top 16%
×6stories
+12ft-82ft

Overall

4319

Males

3911

M40-44

3911

24M→40K

24.0 - 24.9 mi

Top 18%
×1story
+6ft-20ft

Overall

4713

Males

4140

M40-44

4140

40K→25.2M

24.9 - 25.2 mi

Top 17%
×1story
+13ft-16ft

Overall

4496

Males

3909

M40-44

3909

25.2M→Finish

25.2 - 26.2 mi

Top 15%
×2stories
+22ft-21ft

Overall

4075

Males

3596

M40-44

3596

Passing Analysis

Category:
Athletes Passed
1252
Passed By
890
Net Change
+362
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#4061
5K → 10K298163+135#4061#3926
10K → 15K25628+228#3926#3698
15K → 20K12378+45#3698#3653
20K → Half1121-10#3653#3663
Half → 25K69115-46#3663#3709
25K → 30K11185+26#3709#3683
30K → 20M6655+11#3683#3672
20M → 21M6933+36#3672#3636
21M → 35K4223+19#3636#3617
35K → 23M8141+40#3617#3577
23M → 24M2868-40#3577#3617
24M → 40K3575-40#3617#3657
40K → 25.2M1536-21#3657#3678
25.2M → Finish4869-21#3678#3699
TOTALS1252890+362
📊

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