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BOSTON MARATHON 2023

Jill Brown

Bib: 20116•F

MA

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Top 40%
Division (F40-44)
#0 / 1878
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
26:11
Rank: #17079
Start → 5K
26:11 | 8:26/mi
10K· 6.21 mi
51:40
Rank: #16622 (+457)
5K → 10K
25:29 | 8:12/mi
15K· 9.32 mi
1:16:42
Rank: #16034 (+588)
10K → 15K
25:02 | 8:03/mi
20K· 12.43 mi
1:41:46
Rank: #15506 (+528)
15K → 20K
25:04 | 8:04/mi
Half· 13.11 mi
1:47:15
Rank: #15467 (+39)
20K → Half
5:29 | 8:02/mi
25K· 15.53 mi
2:09:32
Rank: #16316 (-849)
Half → 25K
22:17 | 9:11/mi
30K· 18.64 mi
2:37:13
Rank: #16381 (-65)
25K → 30K
27:41 | 8:55/mi
20M
2:50:02
Rank: #16547 (-166)
30K → 20M
12:49 | 9:26/mi
21M
3:00:03
Rank: #16653 (-106)
20M → 21M
10:01 | 10:01/mi
35K· 21.75 mi
3:06:27
Rank: #16602 (+51)
21M → 35K
6:24 | 8:33/mi
23M
3:17:46
Rank: #16583 (+19)
35K → 23M
11:19 | 9:02/mi
24M
3:26:37
Rank: #16568 (+15)
23M → 24M
8:51 | 8:51/mi
40K· 24.85 mi
3:34:20
Rank: #16540 (+28)
24M → 40K
7:43 | 9:02/mi
25.2M
3:37:31
Rank: #16478 (+62)
40K → 25.2M
3:11 | 9:14/mi
Finish· 26.22 mi
3:46:08
Rank: #16410 (+68)
25.2M → Finish
8:37 | 8:27/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:47:15
Pace8:11 /mi
2nd Half
Distance13.11 mi
Time1:58:53
Pace9:04 /mi
📊Positive Split: 10.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:42:2026:118:2626:11
8:26
-
10K
6.21 mi12:07:4951:408:1925:29
8:12
-0:14
15K
9.32 mi12:32:511:16:428:1425:02
8:03
-0:09
20K
12.43 mi12:57:551:41:468:1125:04
8:04
+0:01
Half
13.11 mi13:03:241:47:158:115:29
8:02
-0:02
25K
15.53 mi13:25:412:09:328:2022:17
9:11
+1:09
30K
18.64 mi13:53:222:37:138:2627:41
8:55
-0:16
20M
20.00 mi14:06:112:50:028:3012:49
9:26
+0:31
21M
21.00 mi14:16:123:00:038:3410:01
10:01
+0:35
35K
21.75 mi14:22:363:06:278:346:24
8:33
-1:28
23M
23.00 mi14:33:553:17:468:3611:19
9:02
+0:29
24M
24.00 mi14:42:463:26:378:378:51
8:51
-0:11
40K
24.85 mi14:50:293:34:208:377:43
9:02
+0:11
25.2M
25.20 mi14:53:403:37:318:383:11
9:14
+0:12
Finish
26.22 mi15:02:173:46:088:388:37
8:27
-0:47

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

8:02 /mi

Average Pace

8:38 /mi

Slowest Pace

10:01 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:02:16

54% of race

Time at Steady Pace

55:34

25% of race

Time at Slower Pace

48:18

21% of race

Average Pace: 8:37 /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 mi11:42:2026:118:2626:11
8:26
#17079
10K
6.21 mi12:07:4951:408:1925:29
8:12
#16622
15K
9.32 mi12:32:511:16:428:1425:02
8:03
#16034
20K
12.43 mi12:57:551:41:468:1125:04
8:04
#15506
Half
13.11 mi13:03:241:47:158:115:29
8:02
#15467
25K
15.53 mi13:25:412:09:328:2022:17
9:11
#16316
30K
18.64 mi13:53:222:37:138:2627:41
8:55
#16381
20M
20.00 mi14:06:112:50:028:3012:49
9:26
#16547
21M
21.00 mi14:16:123:00:038:3410:01
10:01
#16653
35K
21.75 mi14:22:363:06:278:346:24
8:33
#16602
23M
23.00 mi14:33:553:17:468:3611:19
9:02
#16583
24M
24.00 mi14:42:463:26:378:378:51
8:51
#16568
40K
24.85 mi14:50:293:34:208:377:43
9:02
#16540
25.2M
25.20 mi14:53:403:37:318:383:11
9:14
#16478
Finish
26.22 mi15:02:173:46:088:388:37
8:27
#16410
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi170795982598214877(Top 56%)4613(Top 40%)4613(Top 246%)
10K6.21 mi3.10 mi16622+4575658+3245658+32416278(Top 61%)5444(Top 48%)5444(Top 290%)
15K9.32 mi3.11 mi16034+5885305+3535305+35314877(Top 56%)4613(Top 40%)4613(Top 246%)
20K12.43 mi3.11 mi15506+5284995+3104995+31014021(Top 53%)4128(Top 36%)4128(Top 220%)
Half13.11 mi0.68 mi15467+394978+174978+1714755(Top 55%)4551(Top 40%)4551(Top 242%)
25K15.53 mi2.42 mi16316-8495522-5445522-54419803(Top 74%)7582(Top 66%)7582(Top 404%)
30K18.64 mi3.11 mi16381-655613-915613-9116708(Top 63%)5893(Top 52%)5893(Top 314%)
20M20.00 mi1.36 mi16547-1665726-1135726-11318593(Top 70%)7072(Top 62%)7072(Top 377%)
21M21.00 mi1.00 mi16653-1065791-655791-6518105(Top 68%)6817(Top 60%)6817(Top 363%)
35K21.75 mi0.75 mi16602+515775+165775+1615631(Top 59%)5490(Top 48%)5490(Top 292%)
23M23.00 mi1.25 mi16583+195781-65781-616259(Top 61%)5886(Top 52%)5886(Top 313%)
24M24.00 mi1.00 mi16568+155789-85789-816510(Top 62%)6086(Top 53%)6086(Top 324%)
40K24.85 mi0.85 mi16540+285789578916301(Top 61%)6026(Top 53%)6026(Top 321%)
25.2M25.20 mi0.35 mi16478+625764+255764+2513907(Top 52%)4718(Top 41%)4718(Top 251%)
Finish26.22 mi1.02 mi16410+685729+355729+3515164(Top 57%)5353(Top 47%)5353(Top 285%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 56%
×21stories
+97ft-345ft

Overall

14877

Females

4613

F40-44

4613

5K→10K

3.1 - 6.2 mi

Top 61%
×5stories
+79ft-138ft

Overall

16278

Females

5444

F40-44

5444

10K→15K

6.2 - 9.3 mi

Top 56%
×3stories
+67ft-78ft

Overall

14877

Females

4613

F40-44

4613

15K→20K

9.3 - 12.4 mi

Top 53%
×5stories
+106ft-86ft

Overall

14021

Females

4128

F40-44

4128

20K→Half

12.4 - 13.1 mi

Top 55%
×2stories
+19ft-37ft

Overall

14755

Females

4551

F40-44

4551

Half→25K

13.1 - 15.5 mi

Top 74%
×4stories
+66ft-88ft

Overall

19803

Females

7582

F40-44

7582

25K→30K

15.5 - 18.6 mi

Top 63%
×9stories
+181ft-148ft

Overall

16708

Females

5893

F40-44

5893

30K→20M

18.6 - 20.0 mi

Top 70%
×5stories
+64ft-50ft

Overall

18593

Females

7072

F40-44

7072

20M→21M

20.0 - 21.0 mi

Top 68%
×8stories
+106ft-24ft

Overall

18105

Females

6817

F40-44

6817

21M→35K

21.0 - 21.8 mi

Top 59%
×7stories
+17ft-86ft

Overall

15631

Females

5490

F40-44

5490

35K→23M

21.8 - 23.0 mi

Top 61%
×5stories
+23ft-63ft

Overall

16259

Females

5886

F40-44

5886

23M→24M

23.0 - 24.0 mi

Top 62%
×6stories
+12ft-82ft

Overall

16510

Females

6086

F40-44

6086

24M→40K

24.0 - 24.9 mi

Top 61%
×1story
+6ft-20ft

Overall

16301

Females

6026

F40-44

6026

40K→25.2M

24.9 - 25.2 mi

Top 52%
×1story
+13ft-16ft

Overall

13907

Females

4718

F40-44

4718

25.2M→Finish

25.2 - 26.2 mi

Top 57%
×2stories
+22ft-21ft

Overall

15164

Females

5353

F40-44

5353

Passing Analysis

Category:
Athletes Passed
2548
Passed By
1879
Net Change
+669
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#17079
5K → 10K591134+457#17079#16622
10K → 15K62638+588#16622#16034
15K → 20K54315+528#16034#15506
20K → Half5112+39#15506#15467
Half → 25K23872-849#15467#16316
25K → 30K155220-65#16316#16381
30K → 20M42208-166#16381#16547
20M → 21M46152-106#16547#16653
21M → 35K7524+51#16653#16602
35K → 23M8566+19#16602#16583
23M → 24M7560+15#16583#16568
24M → 40K6840+28#16568#16540
40K → 25.2M686+62#16540#16478
25.2M → Finish10032+68#16478#16410
TOTALS25481879+669
📊

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