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BOSTON MARATHON 2023

David Boonstra

Bib: 9502•M

NJ

Masters
Boston Marathon logo
0:00
0:00
/ mi
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Overall
#0 / 26622
Top 25%
Gender (Male)
#0 / 15176
Top 39%
Masters (Masters Men)
#0 / 9891
Top 25%
Age Group (M40-44)
#0 / 2241
Race Day Weather
49°/39°F
light intensity drizzle

Race Timeline and Course Information

Your journey through the course with elevation, pacing, and checkpoint details

⏱️ Race Timeline

Watch your race unfold from start to finish

Start
0:00:00
Race begins
5K· 3.11 mi
22:17
Rank: #7328
Start → 5K
22:17 | 7:10/mi
10K· 6.21 mi
44:29
Rank: #7473 (-145)
5K → 10K
22:12 | 7:09/mi
15K· 9.32 mi
1:06:45
Rank: #7495 (-22)
10K → 15K
22:16 | 7:10/mi
20K· 12.43 mi
1:29:33
Rank: #7587 (-92)
15K → 20K
22:48 | 7:20/mi
Half· 13.11 mi
1:34:28
Rank: #7584 (+3)
20K → Half
4:55 | 7:12/mi
25K· 15.53 mi
1:51:57
Rank: #7402 (+182)
Half → 25K
17:29 | 7:13/mi
30K· 18.64 mi
2:14:44
Rank: #7141 (+261)
25K → 30K
22:47 | 7:20/mi
20M
2:25:06
Rank: #7150 (-9)
30K → 20M
10:22 | 7:38/mi
21M
2:32:45
Rank: #6997 (+153)
20M → 21M
7:39 | 7:39/mi
35K· 21.75 mi
2:38:09
Rank: #6966 (+31)
21M → 35K
5:24 | 7:13/mi
23M
2:47:25
Rank: #6864 (+102)
35K → 23M
9:16 | 7:24/mi
24M
2:54:46
Rank: #6825 (+39)
23M → 24M
7:21 | 7:21/mi
40K· 24.85 mi
3:01:09
Rank: #6771 (+54)
24M → 40K
6:23 | 7:28/mi
25.2M
3:03:51
Rank: #6730 (+41)
40K → 25.2M
2:42 | 7:50/mi
Finish· 26.22 mi
3:11:18
Rank: #6703 (+27)
25.2M → Finish
7:27 | 7:19/mi
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Splits & Pacing

Detailed breakdown of your race performance at each timing point

Half Splits

1st HalfFaster
via Half
Distance13.11 mi
Time1:34:28
Pace7:12 /mi
2nd Half
Distance13.11 mi
Time1:36:50
Pace7:23 /mi
📊Positive Split: 2.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:48:0222:177:1022:17
7:10
-
10K
6.21 mi11:10:1444:297:1022:12
7:09
-0:01
15K
9.32 mi11:32:301:06:457:1022:16
7:10
+0:01
20K
12.43 mi11:55:181:29:337:1222:48
7:20
+0:10
Half
13.11 mi12:00:131:34:287:124:55
7:12
-0:08
25K
15.53 mi12:17:421:51:577:1217:29
7:13
+0:01
30K
18.64 mi12:40:292:14:447:1422:47
7:20
+0:07
20M
20.00 mi12:50:512:25:067:1510:22
7:38
+0:18
21M
21.00 mi12:58:302:32:457:167:39
7:39
+0:01
35K
21.75 mi13:03:542:38:097:165:24
7:13
-0:26
23M
23.00 mi13:13:102:47:257:179:16
7:24
+0:11
24M
24.00 mi13:20:312:54:467:177:21
7:21
-0:03
40K
24.85 mi13:26:543:01:097:176:23
7:28
+0:07
25.2M
25.20 mi13:29:363:03:517:182:42
7:50
+0:22
Finish
26.22 mi13:37:033:11:187:187:27
7:19
-0:31

Checkpoint Splits Visualizations

Explore your race data through different visual perspectives. Scroll to discover each visualization.

📈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

7:09 /mi

Average Pace

7:18 /mi

Slowest Pace

7:50 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Bar length shows time spent in each segment. Colors mark your faster to slower segments, relative to your own pace.

Time at Faster Pace

2:50:35

89% of race

Time at Steady Pace

20:43

11% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:18 /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

Enhanced split table showing pace trends through mini sparkline visualizations.

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi10:48:0222:177:1022:17
7:10
#7328
10K
6.21 mi11:10:1444:297:1022:12
7:09
#7473
15K
9.32 mi11:32:301:06:457:1022:16
7:10
#7495
20K
12.43 mi11:55:181:29:337:1222:48
7:20
#7587
Half
13.11 mi12:00:131:34:287:124:55
7:12
#7584
25K
15.53 mi12:17:421:51:577:1217:29
7:13
#7402
30K
18.64 mi12:40:292:14:447:1422:47
7:20
#7141
20M
20.00 mi12:50:512:25:067:1510:22
7:38
#7150
21M
21.00 mi12:58:302:32:457:167:39
7:39
#6997
35K
21.75 mi13:03:542:38:097:165:24
7:13
#6966
23M
23.00 mi13:13:102:47:257:179:16
7:24
#6864
24M
24.00 mi13:20:312:54:467:177:21
7:21
#6825
40K
24.85 mi13:26:543:01:097:176:23
7:28
#6771
25.2M
25.20 mi13:29:363:03:517:182:42
7:50
#6730
Finish
26.22 mi13:37:033:11:187:187:27
7:19
#6703
Faster pace
Steady pace
Slower pace

Rankings

Your position at each checkpoint and how you ranked in each segment

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi7328652165217564(Top 28%)6635(Top 44%)6635(Top 296%)
10K6.21 mi3.10 mi7473-1456615-946615-947715(Top 29%)6740(Top 44%)6740(Top 301%)
15K9.32 mi3.11 mi7495-226618-36618-37564(Top 28%)6635(Top 44%)6635(Top 296%)
20K12.43 mi3.11 mi7587-926664-466664-468061(Top 30%)6925(Top 46%)6925(Top 309%)
Half13.11 mi0.68 mi7584+36658+66658+67837(Top 29%)6785(Top 45%)6785(Top 303%)
25K15.53 mi2.42 mi7402+1826530+1286530+1286727(Top 25%)5952(Top 39%)5952(Top 266%)
30K18.64 mi3.11 mi7141+2616320+2106320+2106221(Top 23%)5529(Top 36%)5529(Top 247%)
20M20.00 mi1.36 mi7150-96315+56315+57653(Top 29%)6369(Top 42%)6369(Top 284%)
21M21.00 mi1.00 mi6997+1536187+1286187+1285368(Top 20%)4740(Top 31%)4740(Top 212%)
35K21.75 mi0.75 mi6966+316159+286159+286611(Top 25%)5648(Top 37%)5648(Top 252%)
23M23.00 mi1.25 mi6864+1026064+956064+955870(Top 22%)5095(Top 34%)5095(Top 227%)
24M24.00 mi1.00 mi6825+396012+526012+526712(Top 25%)5551(Top 37%)5551(Top 248%)
40K24.85 mi0.85 mi6771+545955+575955+576476(Top 24%)5322(Top 35%)5322(Top 237%)
25.2M25.20 mi0.35 mi6730+415919+365919+365534(Top 21%)4633(Top 31%)4633(Top 207%)
Finish26.22 mi1.02 mi6703+275887+325887+327181(Top 27%)5672(Top 37%)5672(Top 253%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 28%
×21stories
+97ft-345ft

Overall

7564

Males

6635

M40-44

6635

5K→10K

3.1 - 6.2 mi

Top 29%
×5stories
+79ft-138ft

Overall

7715

Males

6740

M40-44

6740

10K→15K

6.2 - 9.3 mi

Top 28%
×3stories
+67ft-78ft

Overall

7564

Males

6635

M40-44

6635

15K→20K

9.3 - 12.4 mi

Top 30%
×5stories
+106ft-86ft

Overall

8061

Males

6925

M40-44

6925

20K→Half

12.4 - 13.1 mi

Top 29%
×2stories
+19ft-37ft

Overall

7837

Males

6785

M40-44

6785

Half→25K

13.1 - 15.5 mi

Top 25%
×4stories
+66ft-88ft

Overall

6727

Males

5952

M40-44

5952

25K→30K

15.5 - 18.6 mi

Top 23%
×9stories
+181ft-148ft

Overall

6221

Males

5529

M40-44

5529

30K→20M

18.6 - 20.0 mi

Top 29%
×5stories
+64ft-50ft

Overall

7653

Males

6369

M40-44

6369

20M→21M

20.0 - 21.0 mi

Top 20%
×8stories
+106ft-24ft

Overall

5368

Males

4740

M40-44

4740

21M→35K

21.0 - 21.8 mi

Top 25%
×7stories
+17ft-86ft

Overall

6611

Males

5648

M40-44

5648

35K→23M

21.8 - 23.0 mi

Top 22%
×5stories
+23ft-63ft

Overall

5870

Males

5095

M40-44

5095

23M→24M

23.0 - 24.0 mi

Top 25%
×6stories
+12ft-82ft

Overall

6712

Males

5551

M40-44

5551

24M→40K

24.0 - 24.9 mi

Top 24%
×1story
+6ft-20ft

Overall

6476

Males

5322

M40-44

5322

40K→25.2M

24.9 - 25.2 mi

Top 21%
×1story
+13ft-16ft

Overall

5534

Males

4633

M40-44

4633

25.2M→Finish

25.2 - 26.2 mi

Top 27%
×2stories
+22ft-21ft

Overall

7181

Males

5672

M40-44

5672

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
1537
Passed By
912
Net Change
+625
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#7328
5K → 10K161306-145#7328#7473
10K → 15K124146-22#7473#7495
15K → 20K88180-92#7495#7587
20K → Half2623+3#7587#7584
Half → 25K19311+182#7584#7402
25K → 30K28221+261#7402#7141
30K → 20M5362-9#7141#7150
20M → 21M16411+153#7150#6997
21M → 35K5019+31#6997#6966
35K → 23M12220+102#6966#6864
23M → 24M7738+39#6864#6825
24M → 40K7925+54#6825#6771
40K → 25.2M476+41#6771#6730
25.2M → Finish7144+27#6730#6703
TOTALS1537912+625
📊

Passing Analysis Visualizations

Explore your passing analysis through 5 different visualizations. Scroll to discover each one.

Time:
Category:

📈Position Graph

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🎨Heatmap Timeline

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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Activity Data

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing