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BOSTON MARATHON 2023

Blair Casey

Bib: 834•M

TX

0:00
0:00
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Overall
#0 / 26622
Top 5%
Gender (Male)
#0 / 15176
Top 8%
Division (M18-39)
#0 / 5285
Top 20%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:09
Rank: #2220
Start → 5K
20:09 | 6:29/mi
10K· 6.21 mi
40:05
Rank: #2245 (-25)
5K → 10K
19:56 | 6:25/mi
15K· 9.32 mi
1:00:01
Rank: #2203 (+42)
10K → 15K
19:56 | 6:25/mi
20K· 12.43 mi
1:20:00
Rank: #2129 (+74)
15K → 20K
19:59 | 6:26/mi
Half· 13.11 mi
1:24:19
Rank: #2109 (+20)
20K → Half
4:19 | 6:20/mi
25K· 15.53 mi
1:39:48
Rank: #2023 (+86)
Half → 25K
15:29 | 6:23/mi
30K· 18.64 mi
2:00:02
Rank: #1919 (+104)
25K → 30K
20:14 | 6:31/mi
20M
2:08:50
Rank: #1869 (+50)
30K → 20M
8:48 | 6:29/mi
21M
2:15:40
Rank: #1822 (+47)
20M → 21M
6:50 | 6:50/mi
35K· 21.75 mi
2:20:07
Rank: #1738 (+84)
21M → 35K
4:27 | 5:57/mi
23M
2:27:47
Rank: #1623 (+115)
35K → 23M
7:40 | 6:07/mi
24M
2:33:47
Rank: #1539 (+84)
23M → 24M
6:00 | 6:00/mi
40K· 24.85 mi
2:39:00
Rank: #1466 (+73)
24M → 40K
5:13 | 6:06/mi
25.2M
2:41:14
Rank: #1441 (+25)
40K → 25.2M
2:14 | 6:29/mi
Finish· 26.22 mi
2:47:07
Rank: #1346 (+95)
25.2M → Finish
5:53 | 5:46/mi

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time1:24:19
Pace6:26 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:22:48
Pace6:19 /mi
📊Negative Split: 1.8% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:21:4320:096:2920:09
6:29
-
10K
6.21 mi10:41:3940:056:2719:56
6:25
-0:04
15K
9.32 mi11:01:351:00:016:2619:56
6:25
0:00
20K
12.43 mi11:21:341:20:006:2619:59
6:26
+0:01
Half
13.11 mi11:25:531:24:196:264:19
6:20
-0:06
25K
15.53 mi11:41:221:39:486:2515:29
6:23
+0:03
30K
18.64 mi12:01:362:00:026:2620:14
6:31
+0:08
20M
20.00 mi12:10:242:08:506:268:48
6:29
-0:02
21M
21.00 mi12:17:142:15:406:286:50
6:50
+0:21
35K
21.75 mi12:21:412:20:076:274:27
5:57
-0:53
23M
23.00 mi12:29:212:27:476:267:40
6:07
+0:10
24M
24.00 mi12:35:212:33:476:246:00
6:00
-0:07
40K
24.85 mi12:40:342:39:006:245:13
6:06
+0:06
25.2M
25.20 mi12:42:482:41:146:242:14
6:29
+0:23
Finish
26.22 mi12:48:412:47:076:235:53
5:46
-0:43

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

5:46 /mi

Average Pace

6:23 /mi

Slowest Pace

6:50 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

33:32

20% of race

Time at Steady Pace

2:06:45

76% of race

Time at Slower Pace

6:50

4% of race

Average Pace: 6:22 /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 mi10:21:4320:096:2920:09
6:29
#2220
10K
6.21 mi10:41:3940:056:2719:56
6:25
#2245
15K
9.32 mi11:01:351:00:016:2619:56
6:25
#2203
20K
12.43 mi11:21:341:20:006:2619:59
6:26
#2129
Half
13.11 mi11:25:531:24:196:264:19
6:20
#2109
25K
15.53 mi11:41:221:39:486:2515:29
6:23
#2023
30K
18.64 mi12:01:362:00:026:2620:14
6:31
#1919
20M
20.00 mi12:10:242:08:506:268:48
6:29
#1869
21M
21.00 mi12:17:142:15:406:286:50
6:50
#1822
35K
21.75 mi12:21:412:20:076:274:27
5:57
#1738
23M
23.00 mi12:29:212:27:476:267:40
6:07
#1623
24M
24.00 mi12:35:212:33:476:246:00
6:00
#1539
40K
24.85 mi12:40:342:39:006:245:13
6:06
#1466
25.2M
25.20 mi12:42:482:41:146:242:14
6:29
#1441
Finish
26.22 mi12:48:412:47:076:235:53
5:46
#1346
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi2220211821182198(Top 8%)2107(Top 14%)2107(Top 40%)
10K6.21 mi3.10 mi2245-252146-282146-282332(Top 9%)2233(Top 15%)2233(Top 42%)
15K9.32 mi3.11 mi2203+422112+342112+342198(Top 8%)2107(Top 14%)2107(Top 40%)
20K12.43 mi3.11 mi2129+742040+722040+721961(Top 7%)1882(Top 12%)1882(Top 36%)
Half13.11 mi0.68 mi2109+202019+212019+211939(Top 7%)1863(Top 12%)1863(Top 35%)
25K15.53 mi2.42 mi2023+861939+801939+801678(Top 6%)1606(Top 11%)1606(Top 30%)
30K18.64 mi3.11 mi1919+1041836+1031836+1031618(Top 6%)1546(Top 10%)1546(Top 29%)
20M20.00 mi1.36 mi1869+501787+491787+491378(Top 5%)1313(Top 9%)1313(Top 25%)
21M21.00 mi1.00 mi1822+471744+431744+431549(Top 6%)1473(Top 10%)1473(Top 28%)
35K21.75 mi0.75 mi1738+841664+801664+80603(Top 2%)565(Top 4%)565(Top 11%)
23M23.00 mi1.25 mi1623+1151553+1111553+111503(Top 2%)472(Top 3%)472(Top 9%)
24M24.00 mi1.00 mi1539+841470+831470+83563(Top 2%)533(Top 4%)533(Top 10%)
40K24.85 mi0.85 mi1466+731399+711399+71499(Top 2%)470(Top 3%)470(Top 9%)
25.2M25.20 mi0.35 mi1441+251375+241375+24499(Top 2%)468(Top 3%)468(Top 9%)
Finish26.22 mi1.02 mi1346+951282+931282+93339(Top 1%)321(Top 2%)321(Top 6%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 8%
×21stories
+97ft-345ft

Overall

2198

Males

2107

M18-39

2107

5K→10K

3.1 - 6.2 mi

Top 9%
×5stories
+79ft-138ft

Overall

2332

Males

2233

M18-39

2233

10K→15K

6.2 - 9.3 mi

Top 8%
×3stories
+67ft-78ft

Overall

2198

Males

2107

M18-39

2107

15K→20K

9.3 - 12.4 mi

Top 7%
×5stories
+106ft-86ft

Overall

1961

Males

1882

M18-39

1882

20K→Half

12.4 - 13.1 mi

Top 7%
×2stories
+19ft-37ft

Overall

1939

Males

1863

M18-39

1863

Half→25K

13.1 - 15.5 mi

Top 6%
×4stories
+66ft-88ft

Overall

1678

Males

1606

M18-39

1606

25K→30K

15.5 - 18.6 mi

Top 6%
×9stories
+181ft-148ft

Overall

1618

Males

1546

M18-39

1546

30K→20M

18.6 - 20.0 mi

Top 5%
×5stories
+64ft-50ft

Overall

1378

Males

1313

M18-39

1313

20M→21M

20.0 - 21.0 mi

Top 6%
×8stories
+106ft-24ft

Overall

1549

Males

1473

M18-39

1473

21M→35K

21.0 - 21.8 mi

Top 2%
×7stories
+17ft-86ft

Overall

603

Males

565

M18-39

565

35K→23M

21.8 - 23.0 mi

Top 2%
×5stories
+23ft-63ft

Overall

503

Males

472

M18-39

472

23M→24M

23.0 - 24.0 mi

Top 2%
×6stories
+12ft-82ft

Overall

563

Males

533

M18-39

533

24M→40K

24.0 - 24.9 mi

Top 2%
×1story
+6ft-20ft

Overall

499

Males

470

M18-39

470

40K→25.2M

24.9 - 25.2 mi

Top 2%
×1story
+13ft-16ft

Overall

499

Males

468

M18-39

468

25.2M→Finish

25.2 - 26.2 mi

Top 1%
×2stories
+22ft-21ft

Overall

339

Males

321

M18-39

321

Passing Analysis

Category:
Athletes Passed
1126
Passed By
252
Net Change
+874
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#2220
5K → 10K100125-25#2220#2245
10K → 15K9149+42#2245#2203
15K → 20K9925+74#2203#2129
20K → Half244+20#2129#2109
Half → 25K9711+86#2109#2023
25K → 30K12117+104#2023#1919
30K → 20M577+50#1919#1869
20M → 21M5811+47#1869#1822
21M → 35K840+84#1822#1738
35K → 23M1150+115#1738#1623
23M → 24M840+84#1623#1539
24M → 40K741+73#1539#1466
40K → 25.2M261+25#1466#1441
25.2M → Finish961+95#1441#1346
TOTALS1126252+874
📊

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