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BOSTON MARATHON 2023

Cassio Souza

Bib: 12218•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 47%
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M50-54)
#0 / 2052
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
8:12/mi
25:28
↑ 97↓ 3451.5%
10K· 6.21 mi
7:34/mi
48:58
↑ 79↓ 1380.4%
15K· 9.32 mi
7:34/mi
1:12:28
↑ 67↓ 78
20K· 12.43 mi
7:37/mi
1:36:09
↑ 106↓ 860.1%
Half· 13.11 mi
7:37/mi
1:41:21
↑ 19↓ 370.5%
25K· 15.53 mi
7:45/mi
2:00:08
↑ 66↓ 880.2%
30K· 18.64 mi
8:05/mi
2:25:14
↑ 181↓ 1480.2%
20M
8:26/mi
2:36:42
↑ 64↓ 500.2%
21M
9:10/mi
2:45:52
↑ 106↓ 241.6%
35K· 21.75 mi
8:13/mi
2:52:01
↑ 17↓ 861.7%
23M
8:34/mi
3:02:45
↑ 23↓ 630.6%
24M
8:28/mi
3:11:13
↓ 821.3%
40K· 24.85 mi
8:39/mi
3:18:37
↓ 200.3%
25.2M
9:37/mi
3:21:56
↑ 13↓ 160.2%
Finish· 26.22 mi
8:26/mi
3:30:32
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:41:21
Pace7:44 /mi
2nd Half
Distance13.11 mi
Time1:49:11
Pace8:20 /mi
📊Positive Split: 7.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:47:5825:288:1225:28
8:12
-
10K
6.21 mi12:11:2848:587:5323:30
7:34
-0:38
15K
9.32 mi12:34:581:12:287:4623:30
7:34
0:00
20K
12.43 mi12:58:391:36:097:4423:41
7:37
+0:03
Half
13.11 mi13:03:511:41:217:445:12
7:37
0:00
25K
15.53 mi13:22:382:00:087:4418:47
7:45
+0:08
30K
18.64 mi13:47:442:25:147:4725:06
8:05
+0:20
20M
20.00 mi13:59:122:36:427:5011:28
8:26
+0:21
21M
21.00 mi14:08:222:45:527:549:10
9:10
+0:44
35K
21.75 mi14:14:312:52:017:556:09
8:13
-0:57
23M
23.00 mi14:25:153:02:457:5710:44
8:34
+0:21
24M
24.00 mi14:33:433:11:137:588:28
8:28
-0:06
40K
24.85 mi14:41:073:18:377:597:24
8:39
+0:11
25.2M
25.20 mi14:44:263:21:568:013:19
9:37
+0:58
Finish
26.22 mi14:53:023:30:328:028:36
8:26
-1:11

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

7:34 /mi

Average Pace

8:02 /mi

Slowest Pace

9:37 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:34:40

45% of race

Time at Steady Pace

1:25:15

40% of race

Time at Slower Pace

30:37

15% of race

Average Pace: 8:02 /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 mi11:47:5825:288:1225:28
8:12
#15441
10K
6.21 mi12:11:2848:587:5323:30
7:34
#13413
15K
9.32 mi12:34:581:12:287:4623:30
7:34
#12455
20K
12.43 mi12:58:391:36:097:4423:41
7:37
#11845
Half
13.11 mi13:03:511:41:217:445:12
7:37
#11813
25K
15.53 mi13:22:382:00:087:4418:47
7:45
#11549
30K
18.64 mi13:47:442:25:147:4725:06
8:05
#11533
20M
20.00 mi13:59:122:36:427:5011:28
8:26
#11671
21M
21.00 mi14:08:222:45:527:549:10
9:10
#11846
35K
21.75 mi14:14:312:52:017:556:09
8:13
#11924
23M
23.00 mi14:25:153:02:457:5710:44
8:34
#12015
24M
24.00 mi14:33:433:11:137:588:28
8:28
#12137
40K
24.85 mi14:41:073:18:377:597:24
8:39
#12209
25.2M
25.20 mi14:44:263:21:568:013:19
9:37
#12289
Finish
26.22 mi14:53:023:30:328:028:36
8:26
#12416
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi15441104891048910701(Top 40%)8509(Top 56%)8509(Top 415%)
10K6.21 mi3.10 mi13413+20289705+7849705+78410983(Top 41%)8672(Top 57%)8672(Top 423%)
15K9.32 mi3.11 mi12455+9589290+4159290+41510701(Top 40%)8509(Top 56%)8509(Top 415%)
20K12.43 mi3.11 mi11845+6109005+2859005+28510258(Top 39%)8219(Top 54%)8219(Top 401%)
Half13.11 mi0.68 mi11813+328993+128993+1211196(Top 42%)8728(Top 58%)8728(Top 425%)
25K15.53 mi2.42 mi11549+2648869+1248869+12410672(Top 40%)8338(Top 55%)8338(Top 406%)
30K18.64 mi3.11 mi11533+168811+588811+5811509(Top 43%)8593(Top 57%)8593(Top 419%)
20M20.00 mi1.36 mi11671-1388845-348845-3413226(Top 50%)9227(Top 61%)9227(Top 450%)
21M21.00 mi1.00 mi11846-1758900-558900-5514276(Top 54%)9609(Top 63%)9609(Top 468%)
35K21.75 mi0.75 mi11924-788926-268926-2613540(Top 51%)9200(Top 61%)9200(Top 448%)
23M23.00 mi1.25 mi12015-918928-28928-213638(Top 51%)9198(Top 61%)9198(Top 448%)
24M24.00 mi1.00 mi12137-1228968-408968-4014241(Top 53%)9407(Top 62%)9407(Top 458%)
40K24.85 mi0.85 mi12209-728980-128980-1214239(Top 53%)9338(Top 62%)9338(Top 455%)
25.2M25.20 mi0.35 mi12289-809008-289008-2815665(Top 59%)9953(Top 66%)9953(Top 485%)
Finish26.22 mi1.02 mi12416-1279043-359043-3514969(Top 56%)9711(Top 64%)9711(Top 473%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 40%
×21story building
+97ft-345ft

Overall

10701

Males

8509

M50-54

8509

5K→10K

3.1 - 6.2 mi

Top 41%
×5story building
+79ft-138ft

Overall

10983

Males

8672

M50-54

8672

10K→15K

6.2 - 9.3 mi

Top 40%
×3story building
+67ft-78ft

Overall

10701

Males

8509

M50-54

8509

15K→20K

9.3 - 12.4 mi

Top 39%
×5story building
+106ft-86ft

Overall

10258

Males

8219

M50-54

8219

20K→Half

12.4 - 13.1 mi

Top 42%
×2story building
+19ft-37ft

Overall

11196

Males

8728

M50-54

8728

Half→25K

13.1 - 15.5 mi

Top 40%
×4story building
+66ft-88ft

Overall

10672

Males

8338

M50-54

8338

25K→30K

15.5 - 18.6 mi

Top 43%
×9story building
+181ft-148ft

Overall

11509

Males

8593

M50-54

8593

30K→20M

18.6 - 20.0 mi

Top 50%
×5story building
+64ft-50ft

Overall

13226

Males

9227

M50-54

9227

20M→21M

20.0 - 21.0 mi

Top 54%
×8story building
+106ft-24ft

Overall

14276

Males

9609

M50-54

9609

21M→35K

21.0 - 21.8 mi

Top 51%
×7story building
+17ft-86ft

Overall

13540

Males

9200

M50-54

9200

35K→23M

21.8 - 23.0 mi

Top 51%
×5story building
+23ft-63ft

Overall

13638

Males

9198

M50-54

9198

23M→24M

23.0 - 24.0 mi

Top 53%
×6story building
+12ft-82ft

Overall

14241

Males

9407

M50-54

9407

24M→40K

24.0 - 24.9 mi

Top 53%
×1story
+6ft-20ft

Overall

14239

Males

9338

M50-54

9338

40K→25.2M

24.9 - 25.2 mi

Top 59%
×1story
+13ft-16ft

Overall

15665

Males

9953

M50-54

9953

25.2M→Finish

25.2 - 26.2 mi

Top 56%
×2story building
+22ft-21ft

Overall

14969

Males

9711

M50-54

9711

Passing Analysis

Category:
Athletes Passed
4460
Passed By
1435
Net Change
+3025
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#15441
5K → 10K204113+2028#15441#13413
10K → 15K97921+958#13413#12455
15K → 20K6155+610#12455#11845
20K → Half5119+32#11845#11813
Half → 25K28319+264#11813#11549
25K → 30K185169+16#11549#11533
30K → 20M58196-138#11533#11671
20M → 21M37212-175#11671#11846
21M → 35K28106-78#11846#11924
35K → 23M62153-91#11924#12015
23M → 24M31153-122#12015#12137
24M → 40K42114-72#12137#12209
40K → 25.2M1292-80#12209#12289
25.2M → Finish36163-127#12289#12416
TOTALS44601435+3025
📊

Passing Visuals

Category:
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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