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BOSTON MARATHON 2023

Monica Cassab

Bib: 13567•F

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 36%
Gender (Female)
#0 / 11423
Top 17%
Division (F18-39)
#0 / 4884
Top 30%
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
7:58/mi
24:46
↑ 97↓ 3451.5%
10K· 6.21 mi
7:54/mi
49:20
↑ 79↓ 1380.4%
15K· 9.32 mi
7:43/mi
1:13:19
↑ 67↓ 78
20K· 12.43 mi
7:51/mi
1:37:42
↑ 106↓ 860.1%
Half· 13.11 mi
7:37/mi
1:42:54
↑ 19↓ 370.5%
25K· 15.53 mi
7:52/mi
2:01:58
↑ 66↓ 880.2%
30K· 18.64 mi
7:52/mi
2:26:25
↑ 181↓ 1480.2%
20M
7:46/mi
2:36:58
↑ 64↓ 500.2%
21M
7:49/mi
2:44:47
↑ 106↓ 241.6%
35K· 21.75 mi
6:53/mi
2:49:56
↑ 17↓ 861.7%
23M
7:22/mi
2:59:09
↑ 23↓ 630.6%
24M
7:00/mi
3:06:09
↓ 821.3%
40K· 24.85 mi
7:03/mi
3:12:11
↓ 200.3%
25.2M
7:38/mi
3:14:49
↑ 13↓ 160.2%
Finish· 26.22 mi
6:45/mi
3:21:42
↑ 22↓ 21

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time1:42:54
Pace7:51 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:38:48
Pace7:32 /mi
📊Negative Split: 4.0% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:52:3824:467:5824:46
7:58
-
10K
6.21 mi11:17:1249:207:5624:34
7:54
-0:04
15K
9.32 mi11:41:111:13:197:5223:59
7:43
-0:11
20K
12.43 mi12:05:341:37:427:5224:23
7:51
+0:08
Half
13.11 mi12:10:461:42:547:515:12
7:37
-0:14
25K
15.53 mi12:29:502:01:587:5119:04
7:52
+0:15
30K
18.64 mi12:54:172:26:257:5124:27
7:52
0:00
20M
20.00 mi13:04:502:36:587:5110:33
7:46
-0:06
21M
21.00 mi13:12:392:44:477:517:49
7:49
+0:03
35K
21.75 mi13:17:482:49:567:495:09
6:53
-0:56
23M
23.00 mi13:27:012:59:097:479:13
7:22
+0:29
24M
24.00 mi13:34:013:06:097:457:00
7:00
-0:22
40K
24.85 mi13:40:033:12:117:446:02
7:03
+0:03
25.2M
25.20 mi13:42:413:14:497:442:38
7:38
+0:35
Finish
26.22 mi13:49:343:21:427:426:53
6:45
-0:53

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

6:45 /mi

Average Pace

7:42 /mi

Slowest Pace

7:58 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

34:17

17% of race

Time at Steady Pace

2:22:39

71% of race

Time at Slower Pace

24:46

12% of race

Average Pace: 7:42 /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 mi10:52:3824:467:5824:46
7:58
#13813
10K
6.21 mi11:17:1249:207:5624:34
7:54
#13904
15K
9.32 mi11:41:111:13:197:5223:59
7:43
#13294
20K
12.43 mi12:05:341:37:427:5224:23
7:51
#12967
Half
13.11 mi12:10:461:42:547:515:12
7:37
#12851
25K
15.53 mi12:29:502:01:587:5119:04
7:52
#12607
30K
18.64 mi12:54:172:26:257:5124:27
7:52
#12074
20M
20.00 mi13:04:502:36:587:5110:33
7:46
#11777
21M
21.00 mi13:12:392:44:477:517:49
7:49
#11390
35K
21.75 mi13:17:482:49:567:495:09
6:53
#11102
23M
23.00 mi13:27:012:59:097:479:13
7:22
#10715
24M
24.00 mi13:34:013:06:097:457:00
7:00
#10390
40K
24.85 mi13:40:033:12:117:446:02
7:03
#10098
25.2M
25.20 mi13:42:413:14:497:442:38
7:38
#9969
Finish
26.22 mi13:49:343:21:427:426:53
6:45
#9647
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi138133901390112015(Top 45%)2905(Top 25%)2905(Top 59%)
10K6.21 mi3.10 mi13904-913981-803981-8014043(Top 53%)4067(Top 36%)4067(Top 83%)
15K9.32 mi3.11 mi13294+6103628+3533628+35312015(Top 45%)2905(Top 25%)2905(Top 59%)
20K12.43 mi3.11 mi12967+3273463+1653463+16512149(Top 46%)3051(Top 27%)3051(Top 62%)
Half13.11 mi0.68 mi12851+1163391+723391+7211238(Top 42%)2469(Top 22%)2469(Top 51%)
25K15.53 mi2.42 mi12607+2443283+1083283+10811640(Top 44%)2849(Top 25%)2849(Top 58%)
30K18.64 mi3.11 mi12074+5333014+2693014+2699911(Top 37%)2114(Top 19%)2114(Top 43%)
20M20.00 mi1.36 mi11777+2972867+1472867+1478611(Top 32%)1644(Top 14%)1644(Top 34%)
21M21.00 mi1.00 mi11390+3872666+2012666+2016297(Top 24%)889(Top 8%)889(Top 18%)
35K21.75 mi0.75 mi11102+2882520+1462520+1464742(Top 18%)459(Top 4%)459(Top 9%)
23M23.00 mi1.25 mi10715+3872366+1542366+1545681(Top 21%)719(Top 6%)719(Top 15%)
24M24.00 mi1.00 mi10390+3252219+1472219+1474715(Top 18%)503(Top 4%)503(Top 10%)
40K24.85 mi0.85 mi10098+2922104+1152104+1154193(Top 16%)461(Top 4%)461(Top 9%)
25.2M25.20 mi0.35 mi9969+1292064+402064+404663(Top 18%)635(Top 6%)635(Top 13%)
Finish26.22 mi1.02 mi9647+3221937+1271937+1273848(Top 14%)439(Top 4%)439(Top 9%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 45%
×21story building
+97ft-345ft

Overall

12015

Females

2905

F18-39

2905

5K→10K

3.1 - 6.2 mi

Top 53%
×5story building
+79ft-138ft

Overall

14043

Females

4067

F18-39

4067

10K→15K

6.2 - 9.3 mi

Top 45%
×3story building
+67ft-78ft

Overall

12015

Females

2905

F18-39

2905

15K→20K

9.3 - 12.4 mi

Top 46%
×5story building
+106ft-86ft

Overall

12149

Females

3051

F18-39

3051

20K→Half

12.4 - 13.1 mi

Top 42%
×2story building
+19ft-37ft

Overall

11238

Females

2469

F18-39

2469

Half→25K

13.1 - 15.5 mi

Top 44%
×4story building
+66ft-88ft

Overall

11640

Females

2849

F18-39

2849

25K→30K

15.5 - 18.6 mi

Top 37%
×9story building
+181ft-148ft

Overall

9911

Females

2114

F18-39

2114

30K→20M

18.6 - 20.0 mi

Top 32%
×5story building
+64ft-50ft

Overall

8611

Females

1644

F18-39

1644

20M→21M

20.0 - 21.0 mi

Top 24%
×8story building
+106ft-24ft

Overall

6297

Females

889

F18-39

889

21M→35K

21.0 - 21.8 mi

Top 18%
×7story building
+17ft-86ft

Overall

4742

Females

459

F18-39

459

35K→23M

21.8 - 23.0 mi

Top 21%
×5story building
+23ft-63ft

Overall

5681

Females

719

F18-39

719

23M→24M

23.0 - 24.0 mi

Top 18%
×6story building
+12ft-82ft

Overall

4715

Females

503

F18-39

503

24M→40K

24.0 - 24.9 mi

Top 16%
×1story
+6ft-20ft

Overall

4193

Females

461

F18-39

461

40K→25.2M

24.9 - 25.2 mi

Top 18%
×1story
+13ft-16ft

Overall

4663

Females

635

F18-39

635

25.2M→Finish

25.2 - 26.2 mi

Top 14%
×2story building
+22ft-21ft

Overall

3848

Females

439

F18-39

439

Passing Analysis

Category:
Athletes Passed
4629*
Passed By
463
Net Change
+4166
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#13813
5K → 10K245336-91#13813#13904
10K → 15K63828+610#13904#13294
15K → 20K37346+327#13294#12967
20K → Half1193+116#12967#12851
Half → 25K27430+244#12851#12607
25K → 30K54815+533#12607#12074
30K → 20M2981+297#12074#11777
20M → 21M3870+387#11777#11390
21M → 35K2880+288#11390#11102
35K → 23M3881+387#11102#10715
23M → 24M3250+325#10715#10390
24M → 40K2920+292#10390#10098
40K → 25.2M132*3+129#10098#9969
25.2M → Finish322*0+322#9969#9647
TOTALS4629*463+4166

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

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