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BOSTON MARATHON 2023

Heather Kw Brown

Bib: 22012•F

OH

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Division (F45-49)
#0 / 1817
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
26:35
Rank: #17955
Start → 5K
26:35 | 8:33/mi
10K· 6.21 mi
52:53
Rank: #17973 (-18)
5K → 10K
26:18 | 8:28/mi
15K· 9.32 mi
1:19:39
Rank: #18150 (-177)
10K → 15K
26:46 | 8:37/mi
20K· 12.43 mi
1:47:07
Rank: #18332 (-182)
15K → 20K
27:28 | 8:50/mi
Half· 13.11 mi
1:53:08
Rank: #18380 (-48)
20K → Half
6:01 | 8:49/mi
25K· 15.53 mi
2:17:04
Rank: #19224 (-844)
Half → 25K
23:56 | 9:52/mi
30K· 18.64 mi
2:47:23
Rank: #19493 (-269)
25K → 30K
30:19 | 9:45/mi
20M
3:01:15
Rank: #19661 (-168)
30K → 20M
13:52 | 10:12/mi
21M
3:11:51
Rank: #19661
20M → 21M
10:36 | 10:36/mi
35K· 21.75 mi
3:19:00
Rank: #19683 (-22)
21M → 35K
7:09 | 9:33/mi
23M
3:31:12
Rank: #19671 (+12)
35K → 23M
12:12 | 9:45/mi
24M
3:42:54
Rank: #20034 (-363)
23M → 24M
11:42 | 11:42/mi
40K· 24.85 mi
3:51:07
Rank: #19977 (+57)
24M → 40K
8:13 | 9:37/mi
25.2M
3:54:35
Rank: #19937 (+40)
40K → 25.2M
3:28 | 10:03/mi
Finish· 26.22 mi
4:03:27
Rank: #19823 (+114)
25.2M → Finish
8:52 | 8:42/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:53:08
Pace8:38 /mi
2nd Half
Distance13.11 mi
Time2:10:19
Pace9:56 /mi
📊Positive Split: 15.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:20:2326:358:3326:35
8:33
-
10K
6.21 mi11:46:4152:538:3126:18
8:28
-0:05
15K
9.32 mi12:13:271:19:398:3326:46
8:37
+0:09
20K
12.43 mi12:40:551:47:078:3727:28
8:50
+0:13
Half
13.11 mi12:46:561:53:088:386:01
8:49
-0:01
25K
15.53 mi13:10:522:17:048:4923:56
9:52
+1:03
30K
18.64 mi13:41:112:47:238:5930:19
9:45
-0:07
20M
20.00 mi13:55:033:01:159:0413:52
10:12
+0:27
21M
21.00 mi14:05:393:11:519:0810:36
10:36
+0:24
35K
21.75 mi14:12:483:19:009:097:09
9:33
-1:03
23M
23.00 mi14:25:003:31:129:1112:12
9:45
+0:12
24M
24.00 mi14:36:423:42:549:1711:42
11:42
+1:57
40K
24.85 mi14:44:553:51:079:188:13
9:37
-2:05
25.2M
25.20 mi14:48:233:54:359:193:28
10:03
+0:26
Finish
26.22 mi14:57:154:03:279:188:52
8:42
-1:21

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

8:28 /mi

Average Pace

9:18 /mi

Slowest Pace

11:42 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:02:00

50% of race

Time at Steady Pace

1:25:17

35% of race

Time at Slower Pace

36:10

15% of race

Average Pace: 9:17 /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 mi11:20:2326:358:3326:35
8:33
#17955
10K
6.21 mi11:46:4152:538:3126:18
8:28
#17973
15K
9.32 mi12:13:271:19:398:3326:46
8:37
#18150
20K
12.43 mi12:40:551:47:078:3727:28
8:50
#18332
Half
13.11 mi12:46:561:53:088:386:01
8:49
#18380
25K
15.53 mi13:10:522:17:048:4923:56
9:52
#19224
30K
18.64 mi13:41:112:47:238:5930:19
9:45
#19493
20M
20.00 mi13:55:033:01:159:0413:52
10:12
#19661
21M
21.00 mi14:05:393:11:519:0810:36
10:36
#19661
35K
21.75 mi14:12:483:19:009:097:09
9:33
#19683
23M
23.00 mi14:25:003:31:129:1112:12
9:45
#19671
24M
24.00 mi14:36:423:42:549:1711:42
11:42
#20034
40K
24.85 mi14:44:553:51:079:188:13
9:37
#19977
25.2M
25.20 mi14:48:233:54:359:193:28
10:03
#19937
Finish
26.22 mi14:57:154:03:279:188:52
8:42
#19823
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi179556529652918554(Top 70%)6837(Top 60%)6837(Top 376%)
10K6.21 mi3.10 mi17973-186521+86521+818044(Top 68%)6504(Top 57%)6504(Top 358%)
15K9.32 mi3.11 mi18150-1776617-966617-9618554(Top 70%)6837(Top 60%)6837(Top 376%)
20K12.43 mi3.11 mi18332-1826711-946711-9418902(Top 71%)7033(Top 62%)7033(Top 387%)
Half13.11 mi0.68 mi18380-486732-216732-2119636(Top 74%)7464(Top 65%)7464(Top 411%)
25K15.53 mi2.42 mi19224-8447253-5217253-52121909(Top 82%)8787(Top 77%)8787(Top 484%)
30K18.64 mi3.11 mi19493-2697424-1717424-17120325(Top 76%)7956(Top 70%)7956(Top 438%)
20M20.00 mi1.36 mi19661-1687534-1107534-11021026(Top 79%)8422(Top 74%)8422(Top 464%)
21M21.00 mi1.00 mi196617547-137547-1319895(Top 75%)7872(Top 69%)7872(Top 433%)
35K21.75 mi0.75 mi19683-227565-187565-1820040(Top 75%)7955(Top 70%)7955(Top 438%)
23M23.00 mi1.25 mi19671+127569-47569-419240(Top 72%)7548(Top 66%)7548(Top 415%)
24M24.00 mi1.00 mi20034-3637794-2257794-22524130(Top 91%)10231(Top 90%)10231(Top 563%)
40K24.85 mi0.85 mi19977+577773+217773+2118756(Top 70%)7365(Top 64%)7365(Top 405%)
25.2M25.20 mi0.35 mi19937+407751+227751+2217667(Top 66%)6794(Top 59%)6794(Top 374%)
Finish26.22 mi1.02 mi19823+1147685+667685+6616536(Top 62%)6127(Top 54%)6127(Top 337%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 70%
×21stories
+97ft-345ft

Overall

18554

Females

6837

F45-49

6837

5K→10K

3.1 - 6.2 mi

Top 68%
×5stories
+79ft-138ft

Overall

18044

Females

6504

F45-49

6504

10K→15K

6.2 - 9.3 mi

Top 70%
×3stories
+67ft-78ft

Overall

18554

Females

6837

F45-49

6837

15K→20K

9.3 - 12.4 mi

Top 71%
×5stories
+106ft-86ft

Overall

18902

Females

7033

F45-49

7033

20K→Half

12.4 - 13.1 mi

Top 74%
×2stories
+19ft-37ft

Overall

19636

Females

7464

F45-49

7464

Half→25K

13.1 - 15.5 mi

Top 82%
×4stories
+66ft-88ft

Overall

21909

Females

8787

F45-49

8787

25K→30K

15.5 - 18.6 mi

Top 76%
×9stories
+181ft-148ft

Overall

20325

Females

7956

F45-49

7956

30K→20M

18.6 - 20.0 mi

Top 79%
×5stories
+64ft-50ft

Overall

21026

Females

8422

F45-49

8422

20M→21M

20.0 - 21.0 mi

Top 75%
×8stories
+106ft-24ft

Overall

19895

Females

7872

F45-49

7872

21M→35K

21.0 - 21.8 mi

Top 75%
×7stories
+17ft-86ft

Overall

20040

Females

7955

F45-49

7955

35K→23M

21.8 - 23.0 mi

Top 72%
×5stories
+23ft-63ft

Overall

19240

Females

7548

F45-49

7548

23M→24M

23.0 - 24.0 mi

Top 91%
×6stories
+12ft-82ft

Overall

24130

Females

10231

F45-49

10231

24M→40K

24.0 - 24.9 mi

Top 70%
×1story
+6ft-20ft

Overall

18756

Females

7365

F45-49

7365

40K→25.2M

24.9 - 25.2 mi

Top 66%
×1story
+13ft-16ft

Overall

17667

Females

6794

F45-49

6794

25.2M→Finish

25.2 - 26.2 mi

Top 62%
×2stories
+22ft-21ft

Overall

16536

Females

6127

F45-49

6127

Passing Analysis

Category:
Athletes Passed
1148
Passed By
3016
Net Change
-1868
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#17955
5K → 10K307325-18#17955#17973
10K → 15K119296-177#17973#18150
15K → 20K110292-182#18150#18332
20K → Half1765-48#18332#18380
Half → 25K17861-844#18380#19224
25K → 30K89358-269#19224#19493
30K → 20M43211-168#19493#19661
20M → 21M82820#19661#19661
21M → 35K4062-22#19661#19683
35K → 23M7664+12#19683#19671
23M → 24M6369-363#19671#20034
24M → 40K7619+57#20034#19977
40K → 25.2M466+40#19977#19937
25.2M → Finish1206+114#19937#19823
TOTALS11483016-1868
📊

Passing Visuals

Category:

📈Position Graph

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🎨Heatmap Timeline

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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