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BOSTON MARATHON 2023

Alison Zilli

Bib: 22114•F

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0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Division (F50-54)
#0 / 1207
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
25:57
Rank: #16538
Start → 5K
25:57 | 8:21/mi
10K· 6.21 mi
52:01
Rank: #17009 (-471)
5K → 10K
26:04 | 8:23/mi
15K· 9.32 mi
1:18:38
Rank: #17440 (-431)
10K → 15K
26:37 | 8:34/mi
20K· 12.43 mi
1:45:48
Rank: #17652 (-212)
15K → 20K
27:10 | 8:45/mi
Half· 13.11 mi
1:51:46
Rank: #17718 (-66)
20K → Half
5:58 | 8:45/mi
25K· 15.53 mi
2:13:21
Rank: #17855 (-137)
Half → 25K
21:35 | 8:54/mi
30K· 18.64 mi
2:41:58
Rank: #17906 (-51)
25K → 30K
28:37 | 9:13/mi
20M
2:54:44
Rank: #17954 (-48)
30K → 20M
12:46 | 9:24/mi
21M
3:04:48
Rank: #17970 (-16)
20M → 21M
10:04 | 10:04/mi
35K· 21.75 mi
3:11:29
Rank: #17975 (-5)
21M → 35K
6:41 | 8:56/mi
23M
3:23:33
Rank: #18049 (-74)
35K → 23M
12:04 | 9:38/mi
24M
3:32:56
Rank: #18111 (-62)
23M → 24M
9:23 | 9:23/mi
40K· 24.85 mi
3:41:05
Rank: #18127 (-16)
24M → 40K
8:09 | 9:32/mi
25.2M
3:44:38
Rank: #18146 (-19)
40K → 25.2M
3:33 | 10:18/mi
Finish· 26.22 mi
3:54:13
Rank: #18212 (-66)
25.2M → Finish
9:35 | 9:24/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:51:46
Pace8:32 /mi
2nd Half
Distance13.11 mi
Time2:02:27
Pace9:20 /mi
📊Positive Split: 9.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:40:5925:578:2125:57
8:21
-
10K
6.21 mi12:07:0352:018:2226:04
8:23
+0:02
15K
9.32 mi12:33:401:18:388:2626:37
8:34
+0:11
20K
12.43 mi13:00:501:45:488:3127:10
8:45
+0:11
Half
13.11 mi13:06:481:51:468:325:58
8:45
0:00
25K
15.53 mi13:28:232:13:218:3521:35
8:54
+0:09
30K
18.64 mi13:57:002:41:588:4128:37
9:13
+0:19
20M
20.00 mi14:09:462:54:448:4412:46
9:24
+0:11
21M
21.00 mi14:19:503:04:488:4810:04
10:04
+0:40
35K
21.75 mi14:26:313:11:298:486:41
8:56
-1:08
23M
23.00 mi14:38:353:23:338:5112:04
9:38
+0:42
24M
24.00 mi14:47:583:32:568:529:23
9:23
-0:15
40K
24.85 mi14:56:073:41:058:548:09
9:32
+0:09
25.2M
25.20 mi14:59:403:44:388:553:33
10:18
+0:46
Finish
26.22 mi15:09:153:54:138:569:35
9:24
-0:54

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

8:21 /mi

Average Pace

8:56 /mi

Slowest Pace

10:18 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:20:02

60% of race

Time at Steady Pace

1:00:21

26% of race

Time at Slower Pace

33:50

14% of race

Average Pace: 8:56 /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 mi11:40:5925:578:2125:57
8:21
#16538
10K
6.21 mi12:07:0352:018:2226:04
8:23
#17009
15K
9.32 mi12:33:401:18:388:2626:37
8:34
#17440
20K
12.43 mi13:00:501:45:488:3127:10
8:45
#17652
Half
13.11 mi13:06:481:51:468:325:58
8:45
#17718
25K
15.53 mi13:28:232:13:218:3521:35
8:54
#17855
30K
18.64 mi13:57:002:41:588:4128:37
9:13
#17906
20M
20.00 mi14:09:462:54:448:4412:46
9:24
#17954
21M
21.00 mi14:19:503:04:488:4810:04
10:04
#17970
35K
21.75 mi14:26:313:11:298:486:41
8:56
#17975
23M
23.00 mi14:38:353:23:338:5112:04
9:38
#18049
24M
24.00 mi14:47:583:32:568:529:23
9:23
#18111
40K
24.85 mi14:56:073:41:058:548:09
9:32
#18127
25.2M
25.20 mi14:59:403:44:388:553:33
10:18
#18146
Finish
26.22 mi15:09:153:54:138:569:35
9:24
#18212
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi165385631563118252(Top 69%)6646(Top 58%)6646(Top 551%)
10K6.21 mi3.10 mi17009-4715923-2925923-29217538(Top 66%)6206(Top 54%)6206(Top 514%)
15K9.32 mi3.11 mi17440-4316185-2626185-26218252(Top 69%)6646(Top 58%)6646(Top 551%)
20K12.43 mi3.11 mi17652-2126310-1256310-12518387(Top 69%)6727(Top 59%)6727(Top 557%)
Half13.11 mi0.68 mi17718-666355-456355-4519212(Top 72%)7203(Top 63%)7203(Top 597%)
25K15.53 mi2.42 mi17855-1376449-946449-9418473(Top 69%)6830(Top 60%)6830(Top 566%)
30K18.64 mi3.11 mi17906-516509-606509-6018224(Top 68%)6778(Top 59%)6778(Top 562%)
20M20.00 mi1.36 mi17954-486561-526561-5218446(Top 69%)6994(Top 61%)6994(Top 579%)
21M21.00 mi1.00 mi17970-166574-136574-1318277(Top 69%)6914(Top 61%)6914(Top 573%)
35K21.75 mi0.75 mi17975-56579-56579-517653(Top 66%)6639(Top 58%)6639(Top 550%)
23M23.00 mi1.25 mi18049-746639-606639-6018870(Top 71%)7333(Top 64%)7333(Top 608%)
24M24.00 mi1.00 mi18111-626695-566695-5618793(Top 71%)7322(Top 64%)7322(Top 607%)
40K24.85 mi0.85 mi18127-166713-186713-1818454(Top 69%)7186(Top 63%)7186(Top 595%)
25.2M25.20 mi0.35 mi18146-196728-156728-1518481(Top 69%)7214(Top 63%)7214(Top 598%)
Finish26.22 mi1.02 mi18212-666773-456773-4519788(Top 74%)7883(Top 69%)7883(Top 653%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 69%
×21stories
+97ft-345ft

Overall

18252

Females

6646

F50-54

6646

5K→10K

3.1 - 6.2 mi

Top 66%
×5stories
+79ft-138ft

Overall

17538

Females

6206

F50-54

6206

10K→15K

6.2 - 9.3 mi

Top 69%
×3stories
+67ft-78ft

Overall

18252

Females

6646

F50-54

6646

15K→20K

9.3 - 12.4 mi

Top 69%
×5stories
+106ft-86ft

Overall

18387

Females

6727

F50-54

6727

20K→Half

12.4 - 13.1 mi

Top 72%
×2stories
+19ft-37ft

Overall

19212

Females

7203

F50-54

7203

Half→25K

13.1 - 15.5 mi

Top 69%
×4stories
+66ft-88ft

Overall

18473

Females

6830

F50-54

6830

25K→30K

15.5 - 18.6 mi

Top 68%
×9stories
+181ft-148ft

Overall

18224

Females

6778

F50-54

6778

30K→20M

18.6 - 20.0 mi

Top 69%
×5stories
+64ft-50ft

Overall

18446

Females

6994

F50-54

6994

20M→21M

20.0 - 21.0 mi

Top 69%
×8stories
+106ft-24ft

Overall

18277

Females

6914

F50-54

6914

21M→35K

21.0 - 21.8 mi

Top 66%
×7stories
+17ft-86ft

Overall

17653

Females

6639

F50-54

6639

35K→23M

21.8 - 23.0 mi

Top 71%
×5stories
+23ft-63ft

Overall

18870

Females

7333

F50-54

7333

23M→24M

23.0 - 24.0 mi

Top 71%
×6stories
+12ft-82ft

Overall

18793

Females

7322

F50-54

7322

24M→40K

24.0 - 24.9 mi

Top 69%
×1story
+6ft-20ft

Overall

18454

Females

7186

F50-54

7186

40K→25.2M

24.9 - 25.2 mi

Top 69%
×1story
+13ft-16ft

Overall

18481

Females

7214

F50-54

7214

25.2M→Finish

25.2 - 26.2 mi

Top 74%
×2stories
+22ft-21ft

Overall

19788

Females

7883

F50-54

7883

Passing Analysis

Category:
Athletes Passed
964
Passed By
2638
Net Change
-1674
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#16538
5K → 10K137608-471#16538#17009
10K → 15K71502-431#17009#17440
15K → 20K114326-212#17440#17652
20K → Half1379-66#17652#17718
Half → 25K84221-137#17718#17855
25K → 30K166217-51#17855#17906
30K → 20M72120-48#17906#17954
20M → 21M8298-16#17954#17970
21M → 35K4146-5#17970#17975
35K → 23M56130-74#17975#18049
23M → 24M41103-62#18049#18111
24M → 40K3854-16#18111#18127
40K → 25.2M1837-19#18127#18146
25.2M → Finish3197-66#18146#18212
TOTALS9642638-1674
📊

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