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BOSTON MARATHON 2023

Justin Crichlow

Bib: 3500•M

CA

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 2%
Gender (Male)
#0 / 15176
Top 3%
Division (M18-39)
#0 / 5285
Top 7%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
17:21
Rank: #173
Start → 5K
17:21 | 5:35/mi
10K· 6.21 mi
35:06
Rank: #238 (-65)
5K → 10K
17:45 | 5:43/mi
15K· 9.32 mi
53:06
Rank: #274 (-36)
10K → 15K
18:00 | 5:48/mi
20K· 12.43 mi
1:11:13
Rank: #296 (-22)
15K → 20K
18:07 | 5:50/mi
Half· 13.11 mi
1:15:06
Rank: #290 (+6)
20K → Half
3:53 | 5:42/mi
25K· 15.53 mi
1:29:29
Rank: #304 (-14)
Half → 25K
14:23 | 5:56/mi
30K· 18.64 mi
1:48:38
Rank: #333 (-29)
25K → 30K
19:09 | 6:10/mi
20M
1:57:13
Rank: #353 (-20)
30K → 20M
8:35 | 6:19/mi
21M
2:03:56
Rank: #372 (-19)
20M → 21M
6:43 | 6:43/mi
35K· 21.75 mi
2:08:34
Rank: #388 (-16)
21M → 35K
4:38 | 6:12/mi
23M
2:16:42
Rank: #416 (-28)
35K → 23M
8:08 | 6:30/mi
24M
2:23:06
Rank: #436 (-20)
23M → 24M
6:24 | 6:24/mi
40K· 24.85 mi
2:28:42
Rank: #448 (-12)
24M → 40K
5:36 | 6:33/mi
25.2M
2:31:08
Rank: #454 (-6)
40K → 25.2M
2:26 | 7:03/mi
Finish· 26.22 mi
2:37:45
Rank: #472 (-18)
25.2M → Finish
6:37 | 6:30/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:15:06
Pace5:44 /mi
2nd Half
Distance13.11 mi
Time1:22:39
Pace6:18 /mi
📊Positive Split: 10.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:18:2817:215:3517:21
5:35
-
10K
6.21 mi10:36:1335:065:3917:45
5:43
+0:08
15K
9.32 mi10:54:1353:065:4218:00
5:48
+0:05
20K
12.43 mi11:12:201:11:135:4418:07
5:50
+0:02
Half
13.11 mi11:16:131:15:065:443:53
5:42
-0:08
25K
15.53 mi11:30:361:29:295:4614:23
5:56
+0:14
30K
18.64 mi11:49:451:48:385:5019:09
6:10
+0:14
20M
20.00 mi11:58:201:57:135:528:35
6:19
+0:09
21M
21.00 mi12:05:032:03:565:546:43
6:43
+0:24
35K
21.75 mi12:09:412:08:345:554:38
6:12
-0:31
23M
23.00 mi12:17:492:16:425:578:08
6:30
+0:18
24M
24.00 mi12:24:132:23:065:586:24
6:24
-0:06
40K
24.85 mi12:29:492:28:425:595:36
6:33
+0:09
25.2M
25.20 mi12:32:152:31:086:002:26
7:03
+0:30
Finish
26.22 mi12:38:522:37:456:016:37
6:30
-0:33

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

5:35 /mi

Average Pace

6:01 /mi

Slowest Pace

7:03 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:29:29

57% of race

Time at Steady Pace

38:46

25% of race

Time at Slower Pace

29:30

19% of race

Average Pace: 6:01 /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 mi10:18:2817:215:3517:21
5:35
#173
10K
6.21 mi10:36:1335:065:3917:45
5:43
#238
15K
9.32 mi10:54:1353:065:4218:00
5:48
#274
20K
12.43 mi11:12:201:11:135:4418:07
5:50
#296
Half
13.11 mi11:16:131:15:065:443:53
5:42
#290
25K
15.53 mi11:30:361:29:295:4614:23
5:56
#304
30K
18.64 mi11:49:451:48:385:5019:09
6:10
#333
20M
20.00 mi11:58:201:57:135:528:35
6:19
#353
21M
21.00 mi12:05:032:03:565:546:43
6:43
#372
35K
21.75 mi12:09:412:08:345:554:38
6:12
#388
23M
23.00 mi12:17:492:16:425:578:08
6:30
#416
24M
24.00 mi12:24:132:23:065:586:24
6:24
#436
40K
24.85 mi12:29:492:28:425:595:36
6:33
#448
25.2M
25.20 mi12:32:152:31:086:002:26
7:03
#454
Finish
26.22 mi12:38:522:37:456:016:37
6:30
#472
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi173173173367(Top 1%)334(Top 2%)334(Top 6%)
10K6.21 mi3.10 mi238-65211-38211-38326(Top 1%)292(Top 2%)292(Top 6%)
15K9.32 mi3.11 mi274-36246-35246-35367(Top 1%)334(Top 2%)334(Top 6%)
20K12.43 mi3.11 mi296-22268-22268-22340(Top 1%)308(Top 2%)308(Top 6%)
Half13.11 mi0.68 mi290+6262+6262+6278(Top 1%)256(Top 2%)256(Top 5%)
25K15.53 mi2.42 mi304-14272-10272-10439(Top 2%)406(Top 3%)406(Top 8%)
30K18.64 mi3.11 mi333-29301-29301-29606(Top 2%)570(Top 4%)570(Top 11%)
20M20.00 mi1.36 mi353-20321-20321-20889(Top 3%)848(Top 6%)848(Top 16%)
21M21.00 mi1.00 mi372-19340-19340-191120(Top 4%)1066(Top 7%)1066(Top 20%)
35K21.75 mi0.75 mi388-16356-16356-161195(Top 4%)1138(Top 7%)1138(Top 22%)
23M23.00 mi1.25 mi416-28381-25381-251384(Top 5%)1312(Top 9%)1312(Top 25%)
24M24.00 mi1.00 mi436-20400-19400-191653(Top 6%)1561(Top 10%)1561(Top 30%)
40K24.85 mi0.85 mi448-12412-12412-121699(Top 6%)1597(Top 11%)1597(Top 30%)
25.2M25.20 mi0.35 mi454-6419-7419-71852(Top 7%)1735(Top 11%)1735(Top 33%)
Finish26.22 mi1.02 mi472-18437-18437-182409(Top 9%)2217(Top 15%)2217(Top 42%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 1%
×21stories
+97ft-345ft

Overall

367

Males

334

M18-39

334

5K→10K

3.1 - 6.2 mi

Top 1%
×5stories
+79ft-138ft

Overall

326

Males

292

M18-39

292

10K→15K

6.2 - 9.3 mi

Top 1%
×3stories
+67ft-78ft

Overall

367

Males

334

M18-39

334

15K→20K

9.3 - 12.4 mi

Top 1%
×5stories
+106ft-86ft

Overall

340

Males

308

M18-39

308

20K→Half

12.4 - 13.1 mi

Top 1%
×2stories
+19ft-37ft

Overall

278

Males

256

M18-39

256

Half→25K

13.1 - 15.5 mi

Top 2%
×4stories
+66ft-88ft

Overall

439

Males

406

M18-39

406

25K→30K

15.5 - 18.6 mi

Top 2%
×9stories
+181ft-148ft

Overall

606

Males

570

M18-39

570

30K→20M

18.6 - 20.0 mi

Top 3%
×5stories
+64ft-50ft

Overall

889

Males

848

M18-39

848

20M→21M

20.0 - 21.0 mi

Top 4%
×8stories
+106ft-24ft

Overall

1120

Males

1066

M18-39

1066

21M→35K

21.0 - 21.8 mi

Top 4%
×7stories
+17ft-86ft

Overall

1195

Males

1138

M18-39

1138

35K→23M

21.8 - 23.0 mi

Top 5%
×5stories
+23ft-63ft

Overall

1384

Males

1312

M18-39

1312

23M→24M

23.0 - 24.0 mi

Top 6%
×6stories
+12ft-82ft

Overall

1653

Males

1561

M18-39

1561

24M→40K

24.0 - 24.9 mi

Top 6%
×1story
+6ft-20ft

Overall

1699

Males

1597

M18-39

1597

40K→25.2M

24.9 - 25.2 mi

Top 7%
×1story
+13ft-16ft

Overall

1852

Males

1735

M18-39

1735

25.2M→Finish

25.2 - 26.2 mi

Top 9%
×2stories
+22ft-21ft

Overall

2409

Males

2217

M18-39

2217

Passing Analysis

Category:
Athletes Passed
48
Passed By
347
Net Change
-299
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#173
5K → 10K267-65#173#238
10K → 15K238-36#238#274
15K → 20K325-22#274#296
20K → Half60+6#296#290
Half → 25K519-14#290#304
25K → 30K534-29#304#333
30K → 20M222-20#333#353
20M → 21M221-19#353#372
21M → 35K218-16#372#388
35K → 23M331-28#388#416
23M → 24M323-20#416#436
24M → 40K517-12#436#448
40K → 25.2M410-6#448#454
25.2M → Finish422-18#454#472
TOTALS48347-299
📊

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