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BOSTON MARATHON 2023

Alison Gilroy

Bib: 29270•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 (F40-44)
#0 / 1878
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
9:59/mi
31:02
↑ 97↓ 3451.5%
10K· 6.21 mi
9:30/mi
1:00:32
↑ 79↓ 1380.4%
15K· 9.32 mi
9:23/mi
1:29:42
↑ 67↓ 78
20K· 12.43 mi
9:33/mi
1:59:21
↑ 106↓ 860.1%
Half· 13.11 mi
9:37/mi
2:05:55
↑ 19↓ 370.5%
25K· 15.53 mi
9:42/mi
2:29:26
↑ 66↓ 880.2%
30K· 18.64 mi
10:00/mi
3:00:30
↑ 181↓ 1480.2%
20M
9:54/mi
3:13:57
↑ 64↓ 500.2%
21M
10:08/mi
3:24:05
↑ 106↓ 241.6%
35K· 21.75 mi
9:40/mi
3:31:19
↑ 17↓ 861.7%
23M
10:11/mi
3:44:04
↑ 23↓ 630.6%
24M
9:57/mi
3:54:01
↓ 821.3%
40K· 24.85 mi
9:41/mi
4:02:18
↓ 200.3%
25.2M
10:32/mi
4:05:56
↑ 13↓ 160.2%
Finish· 26.22 mi
9:13/mi
4:15:20
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:05:55
Pace9:36 /mi
2nd Half
Distance13.11 mi
Time2:09:25
Pace9:52 /mi
📊Positive Split: 2.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:49:2831:029:5931:02
9:59
-
10K
6.21 mi12:18:581:00:329:4529:30
9:30
-0:29
15K
9.32 mi12:48:081:29:429:3729:10
9:23
-0:07
20K
12.43 mi13:17:471:59:219:3629:39
9:33
+0:10
Half
13.11 mi13:24:212:05:559:366:34
9:37
+0:04
25K
15.53 mi13:47:522:29:269:3723:31
9:42
+0:05
30K
18.64 mi14:18:563:00:309:4131:04
10:00
+0:18
20M
20.00 mi14:32:233:13:579:4213:27
9:54
-0:06
21M
21.00 mi14:42:313:24:059:4310:08
10:08
+0:14
35K
21.75 mi14:49:453:31:199:437:14
9:40
-0:28
23M
23.00 mi15:02:303:44:049:4512:45
10:11
+0:31
24M
24.00 mi15:12:273:54:019:459:57
9:57
-0:14
40K
24.85 mi15:20:444:02:189:458:17
9:41
-0:16
25.2M
25.20 mi15:24:224:05:569:463:38
10:32
+0:51
Finish
26.22 mi15:33:464:15:209:459:24
9:13
-1:19

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

9:13 /mi

Average Pace

9:45 /mi

Slowest Pace

10:32 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:58:57

94% of race

Time at Steady Pace

16:23

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 9:44 /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 mi11:49:2831:029:5931:02
9:59
#23407
10K
6.21 mi12:18:581:00:329:4529:30
9:30
#23011
15K
9.32 mi12:48:081:29:429:3729:10
9:23
#22653
20K
12.43 mi13:17:471:59:219:3629:39
9:33
#22409
Half
13.11 mi13:24:212:05:559:366:34
9:37
#22414
25K
15.53 mi13:47:522:29:269:3723:31
9:42
#22250
30K
18.64 mi14:18:563:00:309:4131:04
10:00
#22009
20M
20.00 mi14:32:233:13:579:4213:27
9:54
#21874
21M
21.00 mi14:42:313:24:059:4310:08
10:08
#21712
35K
21.75 mi14:49:453:31:199:437:14
9:40
#21664
23M
23.00 mi15:02:303:44:049:4512:45
10:11
#21575
24M
24.00 mi15:12:273:54:019:459:57
9:57
#21537
40K
24.85 mi15:20:444:02:189:458:17
9:41
#21440
25.2M
25.20 mi15:24:224:05:569:463:38
10:32
#21393
Finish
26.22 mi15:33:464:15:209:459:24
9:13
#21302
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi234079606960621928(Top 82%)8751(Top 77%)8751(Top 466%)
10K6.21 mi3.10 mi23011+3969370+2369370+23622511(Top 85%)9091(Top 80%)9091(Top 484%)
15K9.32 mi3.11 mi22653+3589165+2059165+20521928(Top 82%)8751(Top 77%)8751(Top 466%)
20K12.43 mi3.11 mi22409+2449032+1339032+13321691(Top 81%)8620(Top 75%)8620(Top 459%)
Half13.11 mi0.68 mi22414-59036-49036-422459(Top 84%)9044(Top 79%)9044(Top 482%)
25K15.53 mi2.42 mi22250+1648972+648972+6421462(Top 81%)8539(Top 75%)8539(Top 455%)
30K18.64 mi3.11 mi22009+2418840+1328840+13221032(Top 79%)8364(Top 73%)8364(Top 445%)
20M20.00 mi1.36 mi21874+1358775+658775+6520187(Top 76%)7975(Top 70%)7975(Top 425%)
21M21.00 mi1.00 mi21712+1628694+818694+8118519(Top 70%)7070(Top 62%)7070(Top 376%)
35K21.75 mi0.75 mi21664+488677+178677+1720396(Top 77%)8170(Top 72%)8170(Top 435%)
23M23.00 mi1.25 mi21575+898645+328645+3220533(Top 77%)8255(Top 72%)8255(Top 440%)
24M24.00 mi1.00 mi21537+388634+118634+1120675(Top 78%)8373(Top 73%)8373(Top 446%)
40K24.85 mi0.85 mi21440+978591+438591+4319016(Top 71%)7512(Top 66%)7512(Top 400%)
25.2M25.20 mi0.35 mi21393+478569+228569+2219273(Top 72%)7668(Top 67%)7668(Top 408%)
Finish26.22 mi1.02 mi21302+918526+438526+4319061(Top 72%)7477(Top 65%)7477(Top 398%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 82%
×21story building
+97ft-345ft

Overall

21928

Females

8751

F40-44

8751

5K→10K

3.1 - 6.2 mi

Top 85%
×5story building
+79ft-138ft

Overall

22511

Females

9091

F40-44

9091

10K→15K

6.2 - 9.3 mi

Top 82%
×3story building
+67ft-78ft

Overall

21928

Females

8751

F40-44

8751

15K→20K

9.3 - 12.4 mi

Top 81%
×5story building
+106ft-86ft

Overall

21691

Females

8620

F40-44

8620

20K→Half

12.4 - 13.1 mi

Top 84%
×2story building
+19ft-37ft

Overall

22459

Females

9044

F40-44

9044

Half→25K

13.1 - 15.5 mi

Top 81%
×4story building
+66ft-88ft

Overall

21462

Females

8539

F40-44

8539

25K→30K

15.5 - 18.6 mi

Top 79%
×9story building
+181ft-148ft

Overall

21032

Females

8364

F40-44

8364

30K→20M

18.6 - 20.0 mi

Top 76%
×5story building
+64ft-50ft

Overall

20187

Females

7975

F40-44

7975

20M→21M

20.0 - 21.0 mi

Top 70%
×8story building
+106ft-24ft

Overall

18519

Females

7070

F40-44

7070

21M→35K

21.0 - 21.8 mi

Top 77%
×7story building
+17ft-86ft

Overall

20396

Females

8170

F40-44

8170

35K→23M

21.8 - 23.0 mi

Top 77%
×5story building
+23ft-63ft

Overall

20533

Females

8255

F40-44

8255

23M→24M

23.0 - 24.0 mi

Top 78%
×6story building
+12ft-82ft

Overall

20675

Females

8373

F40-44

8373

24M→40K

24.0 - 24.9 mi

Top 71%
×1story
+6ft-20ft

Overall

19016

Females

7512

F40-44

7512

40K→25.2M

24.9 - 25.2 mi

Top 72%
×1story
+13ft-16ft

Overall

19273

Females

7668

F40-44

7668

25.2M→Finish

25.2 - 26.2 mi

Top 72%
×2story building
+22ft-21ft

Overall

19061

Females

7477

F40-44

7477

Passing Analysis

Category:
Athletes Passed
2417
Passed By
312
Net Change
+2105
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#23407
5K → 10K46973+396#23407#23011
10K → 15K38830+358#23011#22653
15K → 20K28137+244#22653#22409
20K → Half2227-5#22409#22414
Half → 25K19531+164#22414#22250
25K → 30K26928+241#22250#22009
30K → 20M15015+135#22009#21874
20M → 21M1642+162#21874#21712
21M → 35K5810+48#21712#21664
35K → 23M11324+89#21664#21575
23M → 24M5416+38#21575#21537
24M → 40K1047+97#21537#21440
40K → 25.2M481+47#21440#21393
25.2M → Finish10211+91#21393#21302
TOTALS2417312+2105
📊

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