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BOSTON MARATHON 2023

Thomas Vanslembrouck

Bib: 1901•M

MI

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 5%
Gender (Male)
#0 / 15176
Top 8%
Division (M18-39)
#0 / 5285
Top 18%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
19:31
Rank: #1378
Start → 5K
19:31 | 6:17/mi
10K· 6.21 mi
38:38
Rank: #1246 (+132)
5K → 10K
19:07 | 6:09/mi
15K· 9.32 mi
57:57
Rank: #1243 (+3)
10K → 15K
19:19 | 6:13/mi
20K· 12.43 mi
1:17:37
Rank: #1294 (-51)
15K → 20K
19:40 | 6:20/mi
Half· 13.11 mi
1:21:54
Rank: #1312 (-18)
20K → Half
4:17 | 6:17/mi
25K· 15.53 mi
1:37:11
Rank: #1304 (+8)
Half → 25K
15:17 | 6:18/mi
30K· 18.64 mi
1:57:12
Rank: #1295 (+9)
25K → 30K
20:01 | 6:27/mi
20M
2:05:58
Rank: #1281 (+14)
30K → 20M
8:46 | 6:27/mi
21M
2:12:45
Rank: #1274 (+7)
20M → 21M
6:47 | 6:47/mi
35K· 21.75 mi
2:17:21
Rank: #1247 (+27)
21M → 35K
4:36 | 6:09/mi
23M
2:25:25
Rank: #1221 (+26)
35K → 23M
8:04 | 6:27/mi
24M
2:32:34
Rank: #1343 (-122)
23M → 24M
7:09 | 7:09/mi
40K· 24.85 mi
2:37:55
Rank: #1306 (+37)
24M → 40K
5:21 | 6:15/mi
25.2M
2:40:10
Rank: #1282 (+24)
40K → 25.2M
2:15 | 6:31/mi
Finish· 26.22 mi
2:46:10
Rank: #1223 (+59)
25.2M → Finish
6:00 | 5:53/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:21:54
Pace6:15 /mi
2nd Half
Distance13.11 mi
Time1:24:16
Pace6:26 /mi
📊Positive Split: 2.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:20:0919:316:1719:31
6:17
-
10K
6.21 mi10:39:1638:386:1319:07
6:09
-0:08
15K
9.32 mi10:58:3557:576:1319:19
6:13
+0:04
20K
12.43 mi11:18:151:17:376:1519:40
6:20
+0:07
Half
13.11 mi11:22:321:21:546:154:17
6:17
-0:03
25K
15.53 mi11:37:491:37:116:1515:17
6:18
+0:01
30K
18.64 mi11:57:501:57:126:1720:01
6:27
+0:09
20M
20.00 mi12:06:362:05:586:188:46
6:27
0:00
21M
21.00 mi12:13:232:12:456:196:47
6:47
+0:20
35K
21.75 mi12:17:592:17:216:194:36
6:09
-0:38
23M
23.00 mi12:26:032:25:256:198:04
6:27
+0:18
24M
24.00 mi12:33:122:32:346:217:09
7:09
+0:42
40K
24.85 mi12:38:332:37:556:215:21
6:15
-0:54
25.2M
25.20 mi12:40:482:40:106:212:15
6:31
+0:16
Finish
26.22 mi12:46:482:46:106:216:00
5:53
-0:38

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

5:53 /mi

Average Pace

6:21 /mi

Slowest Pace

7:09 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

29:43

18% of race

Time at Steady Pace

1:23:25

50% of race

Time at Slower Pace

53:02

32% of race

Average Pace: 6:20 /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 mi10:20:0919:316:1719:31
6:17
#1378
10K
6.21 mi10:39:1638:386:1319:07
6:09
#1246
15K
9.32 mi10:58:3557:576:1319:19
6:13
#1243
20K
12.43 mi11:18:151:17:376:1519:40
6:20
#1294
Half
13.11 mi11:22:321:21:546:154:17
6:17
#1312
25K
15.53 mi11:37:491:37:116:1515:17
6:18
#1304
30K
18.64 mi11:57:501:57:126:1720:01
6:27
#1295
20M
20.00 mi12:06:362:05:586:188:46
6:27
#1281
21M
21.00 mi12:13:232:12:456:196:47
6:47
#1274
35K
21.75 mi12:17:592:17:216:194:36
6:09
#1247
23M
23.00 mi12:26:032:25:256:198:04
6:27
#1221
24M
24.00 mi12:33:122:32:346:217:09
7:09
#1343
40K
24.85 mi12:38:332:37:556:215:21
6:15
#1306
25.2M
25.20 mi12:40:482:40:106:212:15
6:31
#1282
Finish
26.22 mi12:46:482:46:106:216:00
5:53
#1223
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi1378131013101304(Top 5%)1242(Top 8%)1242(Top 24%)
10K6.21 mi3.10 mi1246+1321181+1291181+1291185(Top 4%)1124(Top 7%)1124(Top 21%)
15K9.32 mi3.11 mi1243+31180+11180+11304(Top 5%)1242(Top 8%)1242(Top 24%)
20K12.43 mi3.11 mi1294-511233-531233-531517(Top 6%)1449(Top 10%)1449(Top 27%)
Half13.11 mi0.68 mi1312-181250-171250-171663(Top 6%)1593(Top 10%)1593(Top 30%)
25K15.53 mi2.42 mi1304+81244+61244+61347(Top 5%)1287(Top 8%)1287(Top 24%)
30K18.64 mi3.11 mi1295+91237+71237+71345(Top 5%)1287(Top 8%)1287(Top 24%)
20M20.00 mi1.36 mi1281+141224+131224+131278(Top 5%)1217(Top 8%)1217(Top 23%)
21M21.00 mi1.00 mi1274+71218+61218+61347(Top 5%)1284(Top 8%)1284(Top 24%)
35K21.75 mi0.75 mi1247+271191+271191+271084(Top 4%)1032(Top 7%)1032(Top 20%)
23M23.00 mi1.25 mi1221+261165+261165+261233(Top 5%)1164(Top 8%)1164(Top 22%)
24M24.00 mi1.00 mi1343-1221280-1151280-1155431(Top 20%)4720(Top 31%)4720(Top 89%)
40K24.85 mi0.85 mi1306+371245+351245+35789(Top 3%)748(Top 5%)748(Top 14%)
25.2M25.20 mi0.35 mi1282+241221+241221+24556(Top 2%)524(Top 3%)524(Top 10%)
Finish26.22 mi1.02 mi1223+591166+551166+55509(Top 2%)486(Top 3%)486(Top 9%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 5%
×21stories
+97ft-345ft

Overall

1304

Males

1242

M18-39

1242

5K→10K

3.1 - 6.2 mi

Top 4%
×5stories
+79ft-138ft

Overall

1185

Males

1124

M18-39

1124

10K→15K

6.2 - 9.3 mi

Top 5%
×3stories
+67ft-78ft

Overall

1304

Males

1242

M18-39

1242

15K→20K

9.3 - 12.4 mi

Top 6%
×5stories
+106ft-86ft

Overall

1517

Males

1449

M18-39

1449

20K→Half

12.4 - 13.1 mi

Top 6%
×2stories
+19ft-37ft

Overall

1663

Males

1593

M18-39

1593

Half→25K

13.1 - 15.5 mi

Top 5%
×4stories
+66ft-88ft

Overall

1347

Males

1287

M18-39

1287

25K→30K

15.5 - 18.6 mi

Top 5%
×9stories
+181ft-148ft

Overall

1345

Males

1287

M18-39

1287

30K→20M

18.6 - 20.0 mi

Top 5%
×5stories
+64ft-50ft

Overall

1278

Males

1217

M18-39

1217

20M→21M

20.0 - 21.0 mi

Top 5%
×8stories
+106ft-24ft

Overall

1347

Males

1284

M18-39

1284

21M→35K

21.0 - 21.8 mi

Top 4%
×7stories
+17ft-86ft

Overall

1084

Males

1032

M18-39

1032

35K→23M

21.8 - 23.0 mi

Top 5%
×5stories
+23ft-63ft

Overall

1233

Males

1164

M18-39

1164

23M→24M

23.0 - 24.0 mi

Top 20%
×6stories
+12ft-82ft

Overall

5431

Males

4720

M18-39

4720

24M→40K

24.0 - 24.9 mi

Top 3%
×1story
+6ft-20ft

Overall

789

Males

748

M18-39

748

40K→25.2M

24.9 - 25.2 mi

Top 2%
×1story
+13ft-16ft

Overall

556

Males

524

M18-39

524

25.2M→Finish

25.2 - 26.2 mi

Top 2%
×2stories
+22ft-21ft

Overall

509

Males

486

M18-39

486

Passing Analysis

Category:
Athletes Passed
541
Passed By
386
Net Change
+155
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#1378
5K → 10K15220+132#1378#1246
10K → 15K4037+3#1246#1243
15K → 20K2475-51#1243#1294
20K → Half119-18#1294#1312
Half → 25K3123+8#1312#1304
25K → 30K4334+9#1304#1295
30K → 20M3218+14#1295#1281
20M → 21M2518+7#1281#1274
21M → 35K325+27#1274#1247
35K → 23M337+26#1247#1221
23M → 24M4126-122#1221#1343
24M → 40K392+37#1343#1306
40K → 25.2M251+24#1306#1282
25.2M → Finish601+59#1282#1223
TOTALS541386+155
📊

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