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BOSTON MARATHON 2023

Cassra Clark

Bib: 4511•M

PA

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 18%
Gender (Male)
#0 / 15176
Top 29%
Division (M18-39)
#0 / 5285
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:13
Rank: #2321
Start → 5K
20:13 | 6:30/mi
10K· 6.21 mi
40:09
Rank: #2290 (+31)
5K → 10K
19:56 | 6:25/mi
15K· 9.32 mi
1:00:35
Rank: #2532 (-242)
10K → 15K
20:26 | 6:35/mi
20K· 12.43 mi
1:21:32
Rank: #2809 (-277)
15K → 20K
20:57 | 6:45/mi
Half· 13.11 mi
1:26:03
Rank: #2842 (-33)
20K → Half
4:31 | 6:37/mi
25K· 15.53 mi
1:42:52
Rank: #3152 (-310)
Half → 25K
16:49 | 6:56/mi
30K· 18.64 mi
2:05:07
Rank: #3542 (-390)
25K → 30K
22:15 | 7:10/mi
20M
2:15:35
Rank: #3968 (-426)
30K → 20M
10:28 | 7:42/mi
21M
2:23:32
Rank: #4182 (-214)
20M → 21M
7:57 | 7:57/mi
35K· 21.75 mi
2:28:58
Rank: #4309 (-127)
21M → 35K
5:26 | 7:16/mi
23M
2:38:32
Rank: #4544 (-235)
35K → 23M
9:34 | 7:38/mi
24M
2:46:08
Rank: #4681 (-137)
23M → 24M
7:36 | 7:36/mi
40K· 24.85 mi
2:52:41
Rank: #4754 (-73)
24M → 40K
6:33 | 7:40/mi
25.2M
2:55:26
Rank: #4773 (-19)
40K → 25.2M
2:45 | 7:58/mi
Finish· 26.22 mi
3:02:37
Rank: #4740 (+33)
25.2M → Finish
7:11 | 7:03/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:26:03
Pace6:34 /mi
2nd Half
Distance13.11 mi
Time1:36:34
Pace7:22 /mi
📊Positive Split: 12.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:22:0320:136:3020:13
6:30
-
10K
6.21 mi10:41:5940:096:2819:56
6:25
-0:05
15K
9.32 mi11:02:251:00:356:3020:26
6:35
+0:10
20K
12.43 mi11:23:221:21:326:3420:57
6:45
+0:10
Half
13.11 mi11:27:531:26:036:344:31
6:37
-0:08
25K
15.53 mi11:44:421:42:526:3716:49
6:56
+0:19
30K
18.64 mi12:06:572:05:076:4322:15
7:10
+0:14
20M
20.00 mi12:17:252:15:356:4710:28
7:42
+0:32
21M
21.00 mi12:25:222:23:326:507:57
7:57
+0:15
35K
21.75 mi12:30:482:28:586:515:26
7:16
-0:41
23M
23.00 mi12:40:222:38:326:549:34
7:38
+0:22
24M
24.00 mi12:47:582:46:086:557:36
7:36
-0:02
40K
24.85 mi12:54:312:52:416:576:33
7:40
+0:04
25.2M
25.20 mi12:57:162:55:266:582:45
7:58
+0:18
Finish
26.22 mi13:04:273:02:376:587:11
7:03
-0:55

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

6:25 /mi

Average Pace

6:58 /mi

Slowest Pace

7:58 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:26:03

47% of race

Time at Steady Pace

51:41

28% of race

Time at Slower Pace

44:53

25% of race

Average Pace: 6:58 /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 mi10:22:0320:136:3020:13
6:30
#2321
10K
6.21 mi10:41:5940:096:2819:56
6:25
#2290
15K
9.32 mi11:02:251:00:356:3020:26
6:35
#2532
20K
12.43 mi11:23:221:21:326:3420:57
6:45
#2809
Half
13.11 mi11:27:531:26:036:344:31
6:37
#2842
25K
15.53 mi11:44:421:42:526:3716:49
6:56
#3152
30K
18.64 mi12:06:572:05:076:4322:15
7:10
#3542
20M
20.00 mi12:17:252:15:356:4710:28
7:42
#3968
21M
21.00 mi12:25:222:23:326:507:57
7:57
#4182
35K
21.75 mi12:30:482:28:586:515:26
7:16
#4309
23M
23.00 mi12:40:222:38:326:549:34
7:38
#4544
24M
24.00 mi12:47:582:46:086:557:36
7:36
#4681
40K
24.85 mi12:54:312:52:416:576:33
7:40
#4754
25.2M
25.20 mi12:57:162:55:266:582:45
7:58
#4773
Finish
26.22 mi13:04:273:02:376:587:11
7:03
#4740
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi2321221322133119(Top 12%)2973(Top 20%)2973(Top 56%)
10K6.21 mi3.10 mi2290+312189+242189+242330(Top 9%)2231(Top 15%)2231(Top 42%)
15K9.32 mi3.11 mi2532-2422419-2302419-2303119(Top 12%)2973(Top 20%)2973(Top 56%)
20K12.43 mi3.11 mi2809-2772685-2662685-2663933(Top 15%)3707(Top 24%)3707(Top 70%)
Half13.11 mi0.68 mi2842-332715-302715-303636(Top 14%)3444(Top 23%)3444(Top 65%)
25K15.53 mi2.42 mi3152-3103001-2863001-2865171(Top 19%)4769(Top 31%)4769(Top 90%)
30K18.64 mi3.11 mi3542-3903354-3533354-3535266(Top 20%)4809(Top 32%)4809(Top 91%)
20M20.00 mi1.36 mi3968-4263733-3793733-3798157(Top 31%)6680(Top 44%)6680(Top 126%)
21M21.00 mi1.00 mi4182-2143918-1853918-1856989(Top 26%)5845(Top 39%)5845(Top 111%)
35K21.75 mi0.75 mi4309-1274028-1104028-1106847(Top 26%)5781(Top 38%)5781(Top 109%)
23M23.00 mi1.25 mi4544-2354231-2034231-2037323(Top 28%)6003(Top 40%)6003(Top 114%)
24M24.00 mi1.00 mi4681-1374352-1214352-1218345(Top 31%)6507(Top 43%)6507(Top 123%)
40K24.85 mi0.85 mi4754-734404-524404-527637(Top 29%)6001(Top 40%)6001(Top 114%)
25.2M25.20 mi0.35 mi4773-194412-84412-86255(Top 23%)5091(Top 34%)5091(Top 96%)
Finish26.22 mi1.02 mi4740+334377+354377+355481(Top 21%)4573(Top 30%)4573(Top 87%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 12%
×21stories
+97ft-345ft

Overall

3119

Males

2973

M18-39

2973

5K→10K

3.1 - 6.2 mi

Top 9%
×5stories
+79ft-138ft

Overall

2330

Males

2231

M18-39

2231

10K→15K

6.2 - 9.3 mi

Top 12%
×3stories
+67ft-78ft

Overall

3119

Males

2973

M18-39

2973

15K→20K

9.3 - 12.4 mi

Top 15%
×5stories
+106ft-86ft

Overall

3933

Males

3707

M18-39

3707

20K→Half

12.4 - 13.1 mi

Top 14%
×2stories
+19ft-37ft

Overall

3636

Males

3444

M18-39

3444

Half→25K

13.1 - 15.5 mi

Top 19%
×4stories
+66ft-88ft

Overall

5171

Males

4769

M18-39

4769

25K→30K

15.5 - 18.6 mi

Top 20%
×9stories
+181ft-148ft

Overall

5266

Males

4809

M18-39

4809

30K→20M

18.6 - 20.0 mi

Top 31%
×5stories
+64ft-50ft

Overall

8157

Males

6680

M18-39

6680

20M→21M

20.0 - 21.0 mi

Top 26%
×8stories
+106ft-24ft

Overall

6989

Males

5845

M18-39

5845

21M→35K

21.0 - 21.8 mi

Top 26%
×7stories
+17ft-86ft

Overall

6847

Males

5781

M18-39

5781

35K→23M

21.8 - 23.0 mi

Top 28%
×5stories
+23ft-63ft

Overall

7323

Males

6003

M18-39

6003

23M→24M

23.0 - 24.0 mi

Top 31%
×6stories
+12ft-82ft

Overall

8345

Males

6507

M18-39

6507

24M→40K

24.0 - 24.9 mi

Top 29%
×1story
+6ft-20ft

Overall

7637

Males

6001

M18-39

6001

40K→25.2M

24.9 - 25.2 mi

Top 23%
×1story
+13ft-16ft

Overall

6255

Males

5091

M18-39

5091

25.2M→Finish

25.2 - 26.2 mi

Top 21%
×2stories
+22ft-21ft

Overall

5481

Males

4573

M18-39

4573

Passing Analysis

Category:
Athletes Passed
396
Passed By
2815
Net Change
-2419
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#2321
5K → 10K131100+31#2321#2290
10K → 15K17259-242#2290#2532
15K → 20K15292-277#2532#2809
20K → Half639-33#2809#2842
Half → 25K14324-310#2842#3152
25K → 30K22412-390#3152#3542
30K → 20M9435-426#3542#3968
20M → 21M29243-214#3968#4182
21M → 35K10137-127#4182#4309
35K → 23M24259-235#4309#4544
23M → 24M19156-137#4544#4681
24M → 40K2497-73#4681#4754
40K → 25.2M928-19#4754#4773
25.2M → Finish6734+33#4773#4740
TOTALS3962815-2419
📊

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