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BOSTON MARATHON 2023

Tyler Kastorff

Bib: 813•M

CA

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 1%
Gender (Male)
#0 / 15176
Top 2%
Division (M18-39)
#0 / 5285
Top 5%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
17:42
Rank: #267
Start → 5K
17:42 | 5:42/mi
10K· 6.21 mi
35:24
Rank: #290 (-23)
5K → 10K
17:42 | 5:42/mi
15K· 9.32 mi
53:13
Rank: #293 (-3)
10K → 15K
17:49 | 5:44/mi
20K· 12.43 mi
1:11:12
Rank: #293
15K → 20K
17:59 | 5:47/mi
Half· 13.11 mi
1:15:08
Rank: #296 (-3)
20K → Half
3:56 | 5:46/mi
25K· 15.53 mi
1:29:16
Rank: #296
Half → 25K
14:08 | 5:50/mi
30K· 18.64 mi
1:47:50
Rank: #293 (+3)
25K → 30K
18:34 | 5:59/mi
20M
1:56:03
Rank: #299 (-6)
30K → 20M
8:13 | 6:03/mi
21M
2:02:29
Rank: #300 (-1)
20M → 21M
6:26 | 6:26/mi
35K· 21.75 mi
2:06:58
Rank: #305 (-5)
21M → 35K
4:29 | 6:00/mi
23M
2:14:51
Rank: #305
35K → 23M
7:53 | 6:18/mi
24M
2:21:04
Rank: #318 (-13)
23M → 24M
6:13 | 6:13/mi
40K· 24.85 mi
2:26:29
Rank: #325 (-7)
24M → 40K
5:25 | 6:20/mi
25.2M
2:28:48
Rank: #327 (-2)
40K → 25.2M
2:19 | 6:43/mi
Finish· 26.22 mi
2:35:00
Rank: #323 (+4)
25.2M → Finish
6:12 | 6:05/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:15:08
Pace5:44 /mi
2nd Half
Distance13.11 mi
Time1:19:52
Pace6:06 /mi
📊Positive Split: 6.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:17:4917:425:4217:42
5:42
-
10K
6.21 mi10:35:3135:245:4217:42
5:42
0:00
15K
9.32 mi10:53:2053:135:4317:49
5:44
+0:02
20K
12.43 mi11:11:191:11:125:4417:59
5:47
+0:03
Half
13.11 mi11:15:151:15:085:443:56
5:46
-0:01
25K
15.53 mi11:29:231:29:165:4514:08
5:50
+0:04
30K
18.64 mi11:47:571:47:505:4718:34
5:59
+0:09
20M
20.00 mi11:56:101:56:035:488:13
6:03
+0:04
21M
21.00 mi12:02:362:02:295:506:26
6:26
+0:23
35K
21.75 mi12:07:052:06:585:504:29
6:00
-0:26
23M
23.00 mi12:14:582:14:515:527:53
6:18
+0:18
24M
24.00 mi12:21:112:21:045:536:13
6:13
-0:05
40K
24.85 mi12:26:362:26:295:545:25
6:20
+0:07
25.2M
25.20 mi12:28:552:28:485:542:19
6:43
+0:23
Finish
26.22 mi12:35:072:35:005:556:12
6:05
-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

5:42 /mi

Average Pace

5:55 /mi

Slowest Pace

6:43 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:12:57

86% of race

Time at Steady Pace

22:03

14% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 5:55 /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 mi10:17:4917:425:4217:42
5:42
#267
10K
6.21 mi10:35:3135:245:4217:42
5:42
#290
15K
9.32 mi10:53:2053:135:4317:49
5:44
#293
20K
12.43 mi11:11:191:11:125:4417:59
5:47
#293
Half
13.11 mi11:15:151:15:085:443:56
5:46
#296
25K
15.53 mi11:29:231:29:165:4514:08
5:50
#296
30K
18.64 mi11:47:571:47:505:4718:34
5:59
#293
20M
20.00 mi11:56:101:56:035:488:13
6:03
#299
21M
21.00 mi12:02:362:02:295:506:26
6:26
#300
35K
21.75 mi12:07:052:06:585:504:29
6:00
#305
23M
23.00 mi12:14:582:14:515:527:53
6:18
#305
24M
24.00 mi12:21:112:21:045:536:13
6:13
#318
40K
24.85 mi12:26:362:26:295:545:25
6:20
#325
25.2M
25.20 mi12:28:552:28:485:542:19
6:43
#327
Finish
26.22 mi12:35:072:35:005:556:12
6:05
#323
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi267267267293(Top 1%)261(Top 2%)261(Top 5%)
10K6.21 mi3.10 mi290-23262+5262+5301(Top 1%)268(Top 2%)268(Top 5%)
15K9.32 mi3.11 mi293-3265-3265-3293(Top 1%)261(Top 2%)261(Top 5%)
20K12.43 mi3.11 mi293265265292(Top 1%)264(Top 2%)264(Top 5%)
Half13.11 mi0.68 mi296-3268-3268-3349(Top 1%)320(Top 2%)320(Top 6%)
25K15.53 mi2.42 mi296264+4264+4316(Top 1%)288(Top 2%)288(Top 5%)
30K18.64 mi3.11 mi293+3261+3261+3355(Top 1%)328(Top 2%)328(Top 6%)
20M20.00 mi1.36 mi299-6268-7268-7396(Top 1%)364(Top 2%)364(Top 7%)
21M21.00 mi1.00 mi300-1269-1269-1529(Top 2%)495(Top 3%)495(Top 9%)
35K21.75 mi0.75 mi305-5274-5274-5644(Top 2%)604(Top 4%)604(Top 11%)
23M23.00 mi1.25 mi305274274810(Top 3%)768(Top 5%)768(Top 15%)
24M24.00 mi1.00 mi318-13287-13287-131054(Top 4%)996(Top 7%)996(Top 19%)
40K24.85 mi0.85 mi325-7295-8295-8970(Top 4%)917(Top 6%)917(Top 17%)
25.2M25.20 mi0.35 mi327-2297-2297-2890(Top 3%)846(Top 6%)846(Top 16%)
Finish26.22 mi1.02 mi323+4292+5292+5921(Top 3%)879(Top 6%)879(Top 17%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 1%
×21stories
+97ft-345ft

Overall

293

Males

261

M18-39

261

5K→10K

3.1 - 6.2 mi

Top 1%
×5stories
+79ft-138ft

Overall

301

Males

268

M18-39

268

10K→15K

6.2 - 9.3 mi

Top 1%
×3stories
+67ft-78ft

Overall

293

Males

261

M18-39

261

15K→20K

9.3 - 12.4 mi

Top 1%
×5stories
+106ft-86ft

Overall

292

Males

264

M18-39

264

20K→Half

12.4 - 13.1 mi

Top 1%
×2stories
+19ft-37ft

Overall

349

Males

320

M18-39

320

Half→25K

13.1 - 15.5 mi

Top 1%
×4stories
+66ft-88ft

Overall

316

Males

288

M18-39

288

25K→30K

15.5 - 18.6 mi

Top 1%
×9stories
+181ft-148ft

Overall

355

Males

328

M18-39

328

30K→20M

18.6 - 20.0 mi

Top 1%
×5stories
+64ft-50ft

Overall

396

Males

364

M18-39

364

20M→21M

20.0 - 21.0 mi

Top 2%
×8stories
+106ft-24ft

Overall

529

Males

495

M18-39

495

21M→35K

21.0 - 21.8 mi

Top 2%
×7stories
+17ft-86ft

Overall

644

Males

604

M18-39

604

35K→23M

21.8 - 23.0 mi

Top 3%
×5stories
+23ft-63ft

Overall

810

Males

768

M18-39

768

23M→24M

23.0 - 24.0 mi

Top 4%
×6stories
+12ft-82ft

Overall

1054

Males

996

M18-39

996

24M→40K

24.0 - 24.9 mi

Top 4%
×1story
+6ft-20ft

Overall

970

Males

917

M18-39

917

40K→25.2M

24.9 - 25.2 mi

Top 3%
×1story
+13ft-16ft

Overall

890

Males

846

M18-39

846

25.2M→Finish

25.2 - 26.2 mi

Top 3%
×2stories
+22ft-21ft

Overall

921

Males

879

M18-39

879

Passing Analysis

Category:
Athletes Passed
94
Passed By
150
Net Change
-56
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#267
5K → 10K2245-23#267#290
10K → 15K58-3#290#293
15K → 20K990#293#293
20K → Half25-3#293#296
Half → 25K990#296#296
25K → 30K107+3#296#293
30K → 20M410-6#293#299
20M → 21M67-1#299#300
21M → 35K27-5#300#305
35K → 23M440#305#305
23M → 24M417-13#305#318
24M → 40K613-7#318#325
40K → 25.2M24-2#325#327
25.2M → Finish95+4#327#323
TOTALS94150-56
📊

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