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BOSTON MARATHON 2023

Mary Cass

Bib: 20626•F

MA

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Division (F60-64)
#0 / 527
Top 42%
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
8:30/mi
26:25
↑ 97↓ 3451.5%
10K· 6.21 mi
8:39/mi
53:17
↑ 79↓ 1380.4%
15K· 9.32 mi
8:42/mi
1:20:20
↑ 67↓ 78
20K· 12.43 mi
9:23/mi
1:49:29
↑ 106↓ 860.1%
Half· 13.11 mi
9:01/mi
1:55:38
↑ 19↓ 370.5%
25K· 15.53 mi
9:27/mi
2:18:32
↑ 66↓ 880.2%
30K· 18.64 mi
10:03/mi
2:49:45
↑ 181↓ 1480.2%
20M
10:59/mi
3:04:41
↑ 64↓ 500.2%
21M
12:49/mi
3:17:30
↑ 106↓ 241.6%
35K· 21.75 mi
9:25/mi
3:24:33
↑ 17↓ 861.7%
23M
10:25/mi
3:37:36
↑ 23↓ 630.6%
24M
9:43/mi
3:47:19
↓ 821.3%
40K· 24.85 mi
9:56/mi
3:55:49
↓ 200.3%
25.2M
11:10/mi
3:59:40
↑ 13↓ 160.2%
Finish· 26.22 mi
8:43/mi
4:08:33
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:55:38
Pace8:49 /mi
2nd Half
Distance13.11 mi
Time2:12:55
Pace10:08 /mi
📊Positive Split: 14.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:18:3626:258:3026:25
8:30
-
10K
6.21 mi11:45:2853:178:3526:52
8:39
+0:09
15K
9.32 mi12:12:311:20:208:3727:03
8:42
+0:03
20K
12.43 mi12:41:401:49:298:4929:09
9:23
+0:41
Half
13.11 mi12:47:491:55:388:496:09
9:01
-0:22
25K
15.53 mi13:10:432:18:328:5522:54
9:27
+0:26
30K
18.64 mi13:41:562:49:459:0631:13
10:03
+0:36
20M
20.00 mi13:56:523:04:419:1414:56
10:59
+0:56
21M
21.00 mi14:09:413:17:309:2412:49
12:49
+1:50
35K
21.75 mi14:16:443:24:339:247:03
9:25
-3:24
23M
23.00 mi14:29:473:37:369:2813:03
10:25
+1:00
24M
24.00 mi14:39:303:47:199:289:43
9:43
-0:42
40K
24.85 mi14:48:003:55:499:298:30
9:56
+0:13
25.2M
25.20 mi14:51:513:59:409:313:51
11:10
+1:14
Finish
26.22 mi15:00:444:08:339:298:53
8:43
-2:27

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

8:30 /mi

Average Pace

9:29 /mi

Slowest Pace

12:49 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:29:13

36% of race

Time at Steady Pace

1:23:28

34% of race

Time at Slower Pace

1:15:52

31% of race

Average Pace: 9:29 /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 mi11:18:3626:258:3026:25
8:30
#17589
10K
6.21 mi11:45:2853:178:3526:52
8:39
#18377
15K
9.32 mi12:12:311:20:208:3727:03
8:42
#18586
20K
12.43 mi12:41:401:49:298:4929:09
9:23
#19374
Half
13.11 mi12:47:491:55:388:496:09
9:01
#19444
25K
15.53 mi13:10:432:18:328:5522:54
9:27
#19718
30K
18.64 mi13:41:562:49:459:0631:13
10:03
#20085
20M
20.00 mi13:56:523:04:419:1414:56
10:59
#20383
21M
21.00 mi14:09:413:17:309:2412:49
12:49
#20707
35K
21.75 mi14:16:443:24:339:247:03
9:25
#20649
23M
23.00 mi14:29:473:37:369:2813:03
10:25
#20670
24M
24.00 mi14:39:303:47:199:289:43
9:43
#20635
40K
24.85 mi14:48:003:55:499:298:30
9:56
#20598
25.2M
25.20 mi14:51:513:59:409:313:51
11:10
#20596
Finish
26.22 mi15:00:444:08:339:298:53
8:43
#20467
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF60-64Seg. OverallSeg. FemalesSeg. F60-64
5K3.11 mi3.11 mi175896311631119027(Top 71%)7122(Top 62%)7122(Top 1351%)
10K6.21 mi3.10 mi18377-7886746-4356746-43519129(Top 72%)7162(Top 63%)7162(Top 1359%)
15K9.32 mi3.11 mi18586-2096874-1286874-12819027(Top 71%)7122(Top 62%)7122(Top 1351%)
20K12.43 mi3.11 mi19374-7887356-4827356-48221205(Top 80%)8346(Top 73%)8346(Top 1584%)
Half13.11 mi0.68 mi19444-707392-367392-3620529(Top 77%)7984(Top 70%)7984(Top 1515%)
25K15.53 mi2.42 mi19718-2747551-1597551-15920665(Top 78%)8083(Top 71%)8083(Top 1534%)
30K18.64 mi3.11 mi20085-3677774-2237774-22321158(Top 79%)8437(Top 74%)8437(Top 1601%)
20M20.00 mi1.36 mi20383-2987955-1817955-18122688(Top 85%)9350(Top 82%)9350(Top 1774%)
21M21.00 mi1.00 mi20707-3248137-1828137-18223854(Top 90%)10008(Top 88%)10008(Top 1899%)
35K21.75 mi0.75 mi20649+588115+228115+2219653(Top 74%)7738(Top 68%)7738(Top 1468%)
23M23.00 mi1.25 mi20670-218149-348149-3421140(Top 79%)8604(Top 75%)8604(Top 1633%)
24M24.00 mi1.00 mi20635+358145+48145+419962(Top 75%)7952(Top 70%)7952(Top 1509%)
40K24.85 mi0.85 mi20598+378131+148131+1419827(Top 74%)7962(Top 70%)7962(Top 1511%)
25.2M25.20 mi0.35 mi20596+28130+18130+120846(Top 78%)8498(Top 74%)8498(Top 1613%)
Finish26.22 mi1.02 mi20467+1298068+628068+6216622(Top 62%)6176(Top 54%)6176(Top 1172%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 71%
×21story building
+97ft-345ft

Overall

19027

Females

7122

F60-64

7122

5K→10K

3.1 - 6.2 mi

Top 72%
×5story building
+79ft-138ft

Overall

19129

Females

7162

F60-64

7162

10K→15K

6.2 - 9.3 mi

Top 71%
×3story building
+67ft-78ft

Overall

19027

Females

7122

F60-64

7122

15K→20K

9.3 - 12.4 mi

Top 80%
×5story building
+106ft-86ft

Overall

21205

Females

8346

F60-64

8346

20K→Half

12.4 - 13.1 mi

Top 77%
×2story building
+19ft-37ft

Overall

20529

Females

7984

F60-64

7984

Half→25K

13.1 - 15.5 mi

Top 78%
×4story building
+66ft-88ft

Overall

20665

Females

8083

F60-64

8083

25K→30K

15.5 - 18.6 mi

Top 79%
×9story building
+181ft-148ft

Overall

21158

Females

8437

F60-64

8437

30K→20M

18.6 - 20.0 mi

Top 85%
×5story building
+64ft-50ft

Overall

22688

Females

9350

F60-64

9350

20M→21M

20.0 - 21.0 mi

Top 90%
×8story building
+106ft-24ft

Overall

23854

Females

10008

F60-64

10008

21M→35K

21.0 - 21.8 mi

Top 74%
×7story building
+17ft-86ft

Overall

19653

Females

7738

F60-64

7738

35K→23M

21.8 - 23.0 mi

Top 79%
×5story building
+23ft-63ft

Overall

21140

Females

8604

F60-64

8604

23M→24M

23.0 - 24.0 mi

Top 75%
×6story building
+12ft-82ft

Overall

19962

Females

7952

F60-64

7952

24M→40K

24.0 - 24.9 mi

Top 74%
×1story
+6ft-20ft

Overall

19827

Females

7962

F60-64

7962

40K→25.2M

24.9 - 25.2 mi

Top 78%
×1story
+13ft-16ft

Overall

20846

Females

8498

F60-64

8498

25.2M→Finish

25.2 - 26.2 mi

Top 62%
×2story building
+22ft-21ft

Overall

16622

Females

6176

F60-64

6176

Passing Analysis

Category:
Athletes Passed
798
Passed By
3676
Net Change
-2878
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#17589
5K → 10K79867-788#17589#18377
10K → 15K107316-209#18377#18586
15K → 20K29817-788#18586#19374
20K → Half1080-70#19374#19444
Half → 25K51325-274#19444#19718
25K → 30K72439-367#19718#20085
30K → 20M23321-298#20085#20383
20M → 21M15339-324#20383#20707
21M → 35K6810+58#20707#20649
35K → 23M6788-21#20649#20670
23M → 24M6429+35#20670#20635
24M → 40K6023+37#20635#20598
40K → 25.2M1816+2#20598#20596
25.2M → Finish1356+129#20596#20467
TOTALS7983676-2878
📊

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