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BOSTON MARATHON 2023

Mary Grzybinski

Bib: 31167•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 (F55-59)
#0 / 815
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
9:40/mi
30:03
↑ 97↓ 3451.5%
10K· 6.21 mi
9:27/mi
59:26
↑ 79↓ 1380.4%
15K· 9.32 mi
9:31/mi
1:29:01
↑ 67↓ 78
20K· 12.43 mi
9:42/mi
1:59:08
↑ 106↓ 860.1%
Half· 13.11 mi
9:37/mi
2:05:42
↑ 19↓ 370.5%
25K· 15.53 mi
9:54/mi
2:29:42
↑ 66↓ 880.2%
30K· 18.64 mi
10:47/mi
3:03:13
↑ 181↓ 1480.2%
20M
11:25/mi
3:18:44
↑ 64↓ 500.2%
21M
12:40/mi
3:31:24
↑ 106↓ 241.6%
35K· 21.75 mi
11:11/mi
3:39:46
↑ 17↓ 861.7%
23M
11:32/mi
3:54:13
↑ 23↓ 630.6%
24M
11:27/mi
4:05:40
↓ 821.3%
40K· 24.85 mi
11:53/mi
4:15:50
↓ 200.3%
25.2M
12:08/mi
4:20:01
↑ 13↓ 160.2%
Finish· 26.22 mi
10:51/mi
4:31:04
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:05:42
Pace9:35 /mi
2nd Half
Distance13.11 mi
Time2:25:22
Pace11:05 /mi
📊Positive Split: 15.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:50:1630:039:4030:03
9:40
-
10K
6.21 mi12:19:3959:269:3429:23
9:27
-0:13
15K
9.32 mi12:49:141:29:019:3329:35
9:31
+0:04
20K
12.43 mi13:19:211:59:089:3530:07
9:42
+0:11
Half
13.11 mi13:25:552:05:429:356:34
9:37
-0:05
25K
15.53 mi13:49:552:29:429:3824:00
9:54
+0:17
30K
18.64 mi14:23:263:03:139:5033:31
10:47
+0:53
20M
20.00 mi14:38:573:18:449:5615:31
11:25
+0:38
21M
21.00 mi14:51:373:31:2410:0412:40
12:40
+1:15
35K
21.75 mi14:59:593:39:4610:068:22
11:11
-1:29
23M
23.00 mi15:14:263:54:1310:1114:27
11:32
+0:21
24M
24.00 mi15:25:534:05:4010:1411:27
11:27
-0:05
40K
24.85 mi15:36:034:15:5010:1810:10
11:53
+0:26
25.2M
25.20 mi15:40:144:20:0110:194:11
12:08
+0:15
Finish
26.22 mi15:51:174:31:0410:2111:03
10:51
-1:17

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

9:27 /mi

Average Pace

10:21 /mi

Slowest Pace

12:40 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:29:42

55% of race

Time at Steady Pace

52:56

20% of race

Time at Slower Pace

1:08:26

25% of race

Average Pace: 10:20 /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 mi11:50:1630:039:4030:03
9:40
#22586
10K
6.21 mi12:19:3959:269:3429:23
9:27
#22509
15K
9.32 mi12:49:141:29:019:3329:35
9:31
#22454
20K
12.43 mi13:19:211:59:089:3530:07
9:42
#22349
Half
13.11 mi13:25:552:05:429:356:34
9:37
#22372
25K
15.53 mi13:49:552:29:429:3824:00
9:54
#22315
30K
18.64 mi14:23:263:03:139:5033:31
10:47
#22393
20M
20.00 mi14:38:573:18:449:5615:31
11:25
#22486
21M
21.00 mi14:51:373:31:2410:0412:40
12:40
#22580
35K
21.75 mi14:59:593:39:4610:068:22
11:11
#22620
23M
23.00 mi15:14:263:54:1310:1114:27
11:32
#22665
24M
24.00 mi15:25:534:05:4010:1411:27
11:27
#22721
40K
24.85 mi15:36:034:15:5010:1810:10
11:53
#22769
25.2M
25.20 mi15:40:144:20:0110:194:11
12:08
#22775
Finish
26.22 mi15:51:174:31:0410:2111:03
10:51
#22821
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF55-59Seg. OverallSeg. FemalesSeg. F55-59
5K3.11 mi3.11 mi225869177917722323(Top 84%)8973(Top 79%)8973(Top 1101%)
10K6.21 mi3.10 mi22509+779105+729105+7222395(Top 84%)9030(Top 79%)9030(Top 1108%)
15K9.32 mi3.11 mi22454+559067+389067+3822323(Top 84%)8973(Top 79%)8973(Top 1101%)
20K12.43 mi3.11 mi22349+1059005+629005+6222156(Top 83%)8887(Top 78%)8887(Top 1090%)
Half13.11 mi0.68 mi22372-239013-89013-822485(Top 84%)9070(Top 79%)9070(Top 1113%)
25K15.53 mi2.42 mi22315+579010+39010+321994(Top 83%)8839(Top 77%)8839(Top 1085%)
30K18.64 mi3.11 mi22393-789058-489058-4822770(Top 86%)9335(Top 82%)9335(Top 1145%)
20M20.00 mi1.36 mi22486-939127-699127-6923390(Top 88%)9727(Top 85%)9727(Top 1193%)
21M21.00 mi1.00 mi22580-949184-579184-5723670(Top 89%)9903(Top 87%)9903(Top 1215%)
35K21.75 mi0.75 mi22620-409219-359219-3523631(Top 89%)9950(Top 87%)9950(Top 1221%)
23M23.00 mi1.25 mi22665-459245-269245-2623330(Top 88%)9764(Top 85%)9764(Top 1198%)
24M24.00 mi1.00 mi22721-569290-459290-4523807(Top 89%)10056(Top 88%)10056(Top 1234%)
40K24.85 mi0.85 mi22769-489319-299319-2923756(Top 89%)10059(Top 88%)10059(Top 1234%)
25.2M25.20 mi0.35 mi22775-69322-39322-322745(Top 85%)9522(Top 83%)9522(Top 1168%)
Finish26.22 mi1.02 mi22821-469354-329354-3223693(Top 89%)10004(Top 88%)10004(Top 1227%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 84%
×21story building
+97ft-345ft

Overall

22323

Females

8973

F55-59

8973

5K→10K

3.1 - 6.2 mi

Top 84%
×5story building
+79ft-138ft

Overall

22395

Females

9030

F55-59

9030

10K→15K

6.2 - 9.3 mi

Top 84%
×3story building
+67ft-78ft

Overall

22323

Females

8973

F55-59

8973

15K→20K

9.3 - 12.4 mi

Top 83%
×5story building
+106ft-86ft

Overall

22156

Females

8887

F55-59

8887

20K→Half

12.4 - 13.1 mi

Top 84%
×2story building
+19ft-37ft

Overall

22485

Females

9070

F55-59

9070

Half→25K

13.1 - 15.5 mi

Top 83%
×4story building
+66ft-88ft

Overall

21994

Females

8839

F55-59

8839

25K→30K

15.5 - 18.6 mi

Top 86%
×9story building
+181ft-148ft

Overall

22770

Females

9335

F55-59

9335

30K→20M

18.6 - 20.0 mi

Top 88%
×5story building
+64ft-50ft

Overall

23390

Females

9727

F55-59

9727

20M→21M

20.0 - 21.0 mi

Top 89%
×8story building
+106ft-24ft

Overall

23670

Females

9903

F55-59

9903

21M→35K

21.0 - 21.8 mi

Top 89%
×7story building
+17ft-86ft

Overall

23631

Females

9950

F55-59

9950

35K→23M

21.8 - 23.0 mi

Top 88%
×5story building
+23ft-63ft

Overall

23330

Females

9764

F55-59

9764

23M→24M

23.0 - 24.0 mi

Top 89%
×6story building
+12ft-82ft

Overall

23807

Females

10056

F55-59

10056

24M→40K

24.0 - 24.9 mi

Top 89%
×1story
+6ft-20ft

Overall

23756

Females

10059

F55-59

10059

40K→25.2M

24.9 - 25.2 mi

Top 85%
×1story
+13ft-16ft

Overall

22745

Females

9522

F55-59

9522

25.2M→Finish

25.2 - 26.2 mi

Top 89%
×2story building
+22ft-21ft

Overall

23693

Females

10004

F55-59

10004

Passing Analysis

Category:
Athletes Passed
1071
Passed By
1306
Net Change
-235
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#22586
5K → 10K282205+77#22586#22509
10K → 15K174119+55#22509#22454
15K → 20K18075+105#22454#22349
20K → Half1538-23#22349#22372
Half → 25K12770+57#22372#22315
25K → 30K96174-78#22315#22393
30K → 20M29122-93#22393#22486
20M → 21M28122-94#22486#22580
21M → 35K2969-40#22580#22620
35K → 23M4489-45#22620#22665
23M → 24M2076-56#22665#22721
24M → 40K1765-48#22721#22769
40K → 25.2M1218-6#22769#22775
25.2M → Finish1864-46#22775#22821
TOTALS10711306-235
📊

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