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BOSTON MARATHON 2023

Brandon Terlouw

Bib: 4616•M

WA

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 10%
Gender (Male)
#0 / 15176
Top 16%
Division (M18-39)
#0 / 5285
Top 36%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:47
Rank: #3567
Start → 5K
20:47 | 6:41/mi
10K· 6.21 mi
41:32
Rank: #3799 (-232)
5K → 10K
20:45 | 6:41/mi
15K· 9.32 mi
1:02:03
Rank: #3606 (+193)
10K → 15K
20:31 | 6:36/mi
20K· 12.43 mi
1:22:39
Rank: #3448 (+158)
15K → 20K
20:36 | 6:38/mi
Half· 13.11 mi
1:27:04
Rank: #3400 (+48)
20K → Half
4:25 | 6:28/mi
25K· 15.53 mi
1:43:01
Rank: #3219 (+181)
Half → 25K
15:57 | 6:35/mi
30K· 18.64 mi
2:03:56
Rank: #3029 (+190)
25K → 30K
20:55 | 6:44/mi
20M
2:13:04
Rank: #2952 (+77)
30K → 20M
9:08 | 6:43/mi
21M
2:20:04
Rank: #2874 (+78)
20M → 21M
7:00 | 7:00/mi
35K· 21.75 mi
2:24:50
Rank: #2812 (+62)
21M → 35K
4:46 | 6:22/mi
23M
2:33:13
Rank: #2740 (+72)
35K → 23M
8:23 | 6:42/mi
24M
2:39:43
Rank: #2668 (+72)
23M → 24M
6:30 | 6:30/mi
40K· 24.85 mi
2:45:32
Rank: #2658 (+10)
24M → 40K
5:49 | 6:48/mi
25.2M
2:47:57
Rank: #2634 (+24)
40K → 25.2M
2:25 | 7:00/mi
Finish· 26.22 mi
2:54:41
Rank: #2623 (+11)
25.2M → Finish
6:44 | 6:36/mi

The Course

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Half Splits

1st Half· via Half⚖️ Balanced
Distance13.11 mi
Time1:27:04
Pace6:38 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:27:37
Pace6:41 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:23:0520:476:4120:47
6:41
-
10K
6.21 mi10:43:5041:326:4120:45
6:41
0:00
15K
9.32 mi11:04:211:02:036:3920:31
6:36
-0:05
20K
12.43 mi11:24:571:22:396:3920:36
6:38
+0:02
Half
13.11 mi11:29:221:27:046:384:25
6:28
-0:10
25K
15.53 mi11:45:191:43:016:3815:57
6:35
+0:07
30K
18.64 mi12:06:142:03:566:3920:55
6:44
+0:09
20M
20.00 mi12:15:222:13:046:399:08
6:43
-0:01
21M
21.00 mi12:22:222:20:046:407:00
7:00
+0:17
35K
21.75 mi12:27:082:24:506:404:46
6:22
-0:38
23M
23.00 mi12:35:312:33:136:408:23
6:42
+0:20
24M
24.00 mi12:42:012:39:436:396:30
6:30
-0:12
40K
24.85 mi12:47:502:45:326:405:49
6:48
+0:18
25.2M
25.20 mi12:50:152:47:576:402:25
7:00
+0:12
Finish
26.22 mi12:56:592:54:416:406:44
6:36
-0:24

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

6:22 /mi

Average Pace

6:40 /mi

Slowest Pace

7:00 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:01:01

69% of race

Time at Steady Pace

53:40

31% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:40 /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 mi10:23:0520:476:4120:47
6:41
#3567
10K
6.21 mi10:43:5041:326:4120:45
6:41
#3799
15K
9.32 mi11:04:211:02:036:3920:31
6:36
#3606
20K
12.43 mi11:24:571:22:396:3920:36
6:38
#3448
Half
13.11 mi11:29:221:27:046:384:25
6:28
#3400
25K
15.53 mi11:45:191:43:016:3815:57
6:35
#3219
30K
18.64 mi12:06:142:03:566:3920:55
6:44
#3029
20M
20.00 mi12:15:222:13:046:399:08
6:43
#2952
21M
21.00 mi12:22:222:20:046:407:00
7:00
#2874
35K
21.75 mi12:27:082:24:506:404:46
6:22
#2812
23M
23.00 mi12:35:312:33:136:408:23
6:42
#2740
24M
24.00 mi12:42:012:39:436:396:30
6:30
#2668
40K
24.85 mi12:47:502:45:326:405:49
6:48
#2658
25.2M
25.20 mi12:50:152:47:576:402:25
7:00
#2634
Finish
26.22 mi12:56:592:54:416:406:44
6:36
#2623
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi3567336033603311(Top 12%)3141(Top 21%)3141(Top 59%)
10K6.21 mi3.10 mi3799-2323578-2183578-2184119(Top 15%)3863(Top 25%)3863(Top 73%)
15K9.32 mi3.11 mi3606+1933408+1703408+1703311(Top 12%)3141(Top 21%)3141(Top 59%)
20K12.43 mi3.11 mi3448+1583268+1403268+1403037(Top 11%)2892(Top 19%)2892(Top 55%)
Half13.11 mi0.68 mi3400+483227+413227+412619(Top 10%)2513(Top 17%)2513(Top 48%)
25K15.53 mi2.42 mi3219+1813067+1603067+1602580(Top 10%)2469(Top 16%)2469(Top 47%)
30K18.64 mi3.11 mi3029+1902887+1802887+1802571(Top 10%)2445(Top 16%)2445(Top 46%)
20M20.00 mi1.36 mi2952+772817+702817+702382(Top 9%)2258(Top 15%)2258(Top 43%)
21M21.00 mi1.00 mi2874+782745+722745+722151(Top 8%)2032(Top 13%)2032(Top 38%)
35K21.75 mi0.75 mi2812+622687+582687+581877(Top 7%)1783(Top 12%)1783(Top 34%)
23M23.00 mi1.25 mi2740+722617+702617+702173(Top 8%)2053(Top 14%)2053(Top 39%)
24M24.00 mi1.00 mi2668+722546+712546+712092(Top 8%)1962(Top 13%)1962(Top 37%)
40K24.85 mi0.85 mi2658+102536+102536+102827(Top 11%)2601(Top 17%)2601(Top 49%)
25.2M25.20 mi0.35 mi2634+242513+232513+231778(Top 7%)1671(Top 11%)1671(Top 32%)
Finish26.22 mi1.02 mi2623+112501+122501+123003(Top 11%)2712(Top 18%)2712(Top 51%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 12%
×21stories
+97ft-345ft

Overall

3311

Males

3141

M18-39

3141

5K→10K

3.1 - 6.2 mi

Top 15%
×5stories
+79ft-138ft

Overall

4119

Males

3863

M18-39

3863

10K→15K

6.2 - 9.3 mi

Top 12%
×3stories
+67ft-78ft

Overall

3311

Males

3141

M18-39

3141

15K→20K

9.3 - 12.4 mi

Top 11%
×5stories
+106ft-86ft

Overall

3037

Males

2892

M18-39

2892

20K→Half

12.4 - 13.1 mi

Top 10%
×2stories
+19ft-37ft

Overall

2619

Males

2513

M18-39

2513

Half→25K

13.1 - 15.5 mi

Top 10%
×4stories
+66ft-88ft

Overall

2580

Males

2469

M18-39

2469

25K→30K

15.5 - 18.6 mi

Top 10%
×9stories
+181ft-148ft

Overall

2571

Males

2445

M18-39

2445

30K→20M

18.6 - 20.0 mi

Top 9%
×5stories
+64ft-50ft

Overall

2382

Males

2258

M18-39

2258

20M→21M

20.0 - 21.0 mi

Top 8%
×8stories
+106ft-24ft

Overall

2151

Males

2032

M18-39

2032

21M→35K

21.0 - 21.8 mi

Top 7%
×7stories
+17ft-86ft

Overall

1877

Males

1783

M18-39

1783

35K→23M

21.8 - 23.0 mi

Top 8%
×5stories
+23ft-63ft

Overall

2173

Males

2053

M18-39

2053

23M→24M

23.0 - 24.0 mi

Top 8%
×6stories
+12ft-82ft

Overall

2092

Males

1962

M18-39

1962

24M→40K

24.0 - 24.9 mi

Top 11%
×1story
+6ft-20ft

Overall

2827

Males

2601

M18-39

2601

40K→25.2M

24.9 - 25.2 mi

Top 7%
×1story
+13ft-16ft

Overall

1778

Males

1671

M18-39

1671

25.2M→Finish

25.2 - 26.2 mi

Top 11%
×2stories
+22ft-21ft

Overall

3003

Males

2712

M18-39

2712

Passing Analysis

Category:
Athletes Passed
1482
Passed By
538
Net Change
+944
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#3567
5K → 10K118350-232#3567#3799
10K → 15K22734+193#3799#3606
15K → 20K17517+158#3606#3448
20K → Half502+48#3448#3400
Half → 25K1865+181#3400#3219
25K → 30K21020+190#3219#3029
30K → 20M8710+77#3029#2952
20M → 21M857+78#2952#2874
21M → 35K697+62#2874#2812
35K → 23M8917+72#2812#2740
23M → 24M8412+72#2740#2668
24M → 40K3727+10#2668#2658
40K → 25.2M262+24#2658#2634
25.2M → Finish3928+11#2634#2623
TOTALS1482538+944
📊

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