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BOSTON MARATHON 2023

Erin Shimala

Bib: 20045•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

Start
0:00:00
Race begins
5K· 3.11 mi
27:43
Rank: #20089
Start → 5K
27:43 | 8:55/mi
10K· 6.21 mi
55:46
Rank: #20544 (-455)
5K → 10K
28:03 | 9:02/mi
15K· 9.32 mi
1:24:04
Rank: #20656 (-112)
10K → 15K
28:18 | 9:07/mi
20K· 12.43 mi
1:52:28
Rank: #20583 (+73)
15K → 20K
28:24 | 9:08/mi
Half· 13.11 mi
1:58:37
Rank: #20571 (+12)
20K → Half
6:09 | 9:01/mi
25K· 15.53 mi
2:22:15
Rank: #20795 (-224)
Half → 25K
23:38 | 9:45/mi
30K· 18.64 mi
2:53:17
Rank: #20808 (-13)
25K → 30K
31:02 | 9:59/mi
20M
3:06:32
Rank: #20693 (+115)
30K → 20M
13:15 | 9:45/mi
21M
3:16:42
Rank: #20567 (+126)
20M → 21M
10:10 | 10:10/mi
35K· 21.75 mi
3:23:36
Rank: #20505 (+62)
21M → 35K
6:54 | 9:13/mi
23M
3:35:33
Rank: #20367 (+138)
35K → 23M
11:57 | 9:33/mi
24M
3:45:11
Rank: #20349 (+18)
23M → 24M
9:38 | 9:38/mi
40K· 24.85 mi
3:53:14
Rank: #20249 (+100)
24M → 40K
8:03 | 9:25/mi
25.2M
3:56:41
Rank: #20216 (+33)
40K → 25.2M
3:27 | 10:00/mi
Finish· 26.22 mi
4:05:55
Rank: #20146 (+70)
25.2M → Finish
9:14 | 9:04/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:58:37
Pace9:03 /mi
2nd Half
Distance13.11 mi
Time2:07:18
Pace9:43 /mi
📊Positive Split: 7.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:20:1327:438:5527:43
8:55
-
10K
6.21 mi11:48:1655:468:5828:03
9:02
+0:07
15K
9.32 mi12:16:341:24:049:0128:18
9:07
+0:05
20K
12.43 mi12:44:581:52:289:0328:24
9:08
+0:01
Half
13.11 mi12:51:071:58:379:036:09
9:01
-0:07
25K
15.53 mi13:14:452:22:159:0923:38
9:45
+0:44
30K
18.64 mi13:45:472:53:179:1831:02
9:59
+0:14
20M
20.00 mi13:59:023:06:329:2013:15
9:45
-0:14
21M
21.00 mi14:09:123:16:429:2210:10
10:10
+0:25
35K
21.75 mi14:16:063:23:369:226:54
9:13
-0:57
23M
23.00 mi14:28:033:35:339:2211:57
9:33
+0:20
24M
24.00 mi14:37:413:45:119:239:38
9:38
+0:05
40K
24.85 mi14:45:443:53:149:238:03
9:25
-0:13
25.2M
25.20 mi14:49:113:56:419:243:27
10:00
+0:35
Finish
26.22 mi14:58:254:05:559:239:14
9:04
-0:56

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

8:55 /mi

Average Pace

9:23 /mi

Slowest Pace

10:10 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:21:16

82% of race

Time at Steady Pace

44:39

18% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 9:23 /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 mi11:20:1327:438:5527:43
8:55
#20089
10K
6.21 mi11:48:1655:468:5828:03
9:02
#20544
15K
9.32 mi12:16:341:24:049:0128:18
9:07
#20656
20K
12.43 mi12:44:581:52:289:0328:24
9:08
#20583
Half
13.11 mi12:51:071:58:379:036:09
9:01
#20571
25K
15.53 mi13:14:452:22:159:0923:38
9:45
#20795
30K
18.64 mi13:45:472:53:179:1831:02
9:59
#20808
20M
20.00 mi13:59:023:06:329:2013:15
9:45
#20693
21M
21.00 mi14:09:123:16:429:2210:10
10:10
#20567
35K
21.75 mi14:16:063:23:369:226:54
9:13
#20505
23M
23.00 mi14:28:033:35:339:2211:57
9:33
#20367
24M
24.00 mi14:37:413:45:119:239:38
9:38
#20349
40K
24.85 mi14:45:443:53:149:238:03
9:25
#20249
25.2M
25.20 mi14:49:113:56:419:243:27
10:00
#20216
Finish
26.22 mi14:58:254:05:559:239:14
9:04
#20146
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi200897872787220981(Top 79%)8224(Top 72%)8224(Top 438%)
10K6.21 mi3.10 mi20544-4558059-1878059-18721000(Top 79%)8264(Top 72%)8264(Top 440%)
15K9.32 mi3.11 mi20656-1128099-408099-4020981(Top 79%)8224(Top 72%)8224(Top 438%)
20K12.43 mi3.11 mi20583+738044+558044+5520333(Top 76%)7861(Top 69%)7861(Top 419%)
Half13.11 mi0.68 mi20571+128034+108034+1020522(Top 77%)7977(Top 70%)7977(Top 425%)
25K15.53 mi2.42 mi20795-2248145-1118145-11121606(Top 81%)8618(Top 75%)8618(Top 459%)
30K18.64 mi3.11 mi20808-138164-198164-1921003(Top 79%)8343(Top 73%)8343(Top 444%)
20M20.00 mi1.36 mi20693+1158125+398125+3919723(Top 74%)7715(Top 68%)7715(Top 411%)
21M21.00 mi1.00 mi20567+1268067+588067+5818627(Top 70%)7130(Top 62%)7130(Top 380%)
35K21.75 mi0.75 mi20505+628045+228045+2218878(Top 71%)7332(Top 64%)7332(Top 390%)
23M23.00 mi1.25 mi20367+1387976+697976+6918512(Top 70%)7139(Top 62%)7139(Top 380%)
24M24.00 mi1.00 mi20349+187973+37973+319697(Top 74%)7806(Top 68%)7806(Top 416%)
40K24.85 mi0.85 mi20249+1007931+427931+4218046(Top 68%)6975(Top 61%)6975(Top 371%)
25.2M25.20 mi0.35 mi20216+337918+137918+1317476(Top 66%)6709(Top 59%)6709(Top 357%)
Finish26.22 mi1.02 mi20146+707888+307888+3018313(Top 69%)7079(Top 62%)7079(Top 377%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 79%
×21stories
+97ft-345ft

Overall

20981

Females

8224

F40-44

8224

5K→10K

3.1 - 6.2 mi

Top 79%
×5stories
+79ft-138ft

Overall

21000

Females

8264

F40-44

8264

10K→15K

6.2 - 9.3 mi

Top 79%
×3stories
+67ft-78ft

Overall

20981

Females

8224

F40-44

8224

15K→20K

9.3 - 12.4 mi

Top 76%
×5stories
+106ft-86ft

Overall

20333

Females

7861

F40-44

7861

20K→Half

12.4 - 13.1 mi

Top 77%
×2stories
+19ft-37ft

Overall

20522

Females

7977

F40-44

7977

Half→25K

13.1 - 15.5 mi

Top 81%
×4stories
+66ft-88ft

Overall

21606

Females

8618

F40-44

8618

25K→30K

15.5 - 18.6 mi

Top 79%
×9stories
+181ft-148ft

Overall

21003

Females

8343

F40-44

8343

30K→20M

18.6 - 20.0 mi

Top 74%
×5stories
+64ft-50ft

Overall

19723

Females

7715

F40-44

7715

20M→21M

20.0 - 21.0 mi

Top 70%
×8stories
+106ft-24ft

Overall

18627

Females

7130

F40-44

7130

21M→35K

21.0 - 21.8 mi

Top 71%
×7stories
+17ft-86ft

Overall

18878

Females

7332

F40-44

7332

35K→23M

21.8 - 23.0 mi

Top 70%
×5stories
+23ft-63ft

Overall

18512

Females

7139

F40-44

7139

23M→24M

23.0 - 24.0 mi

Top 74%
×6stories
+12ft-82ft

Overall

19697

Females

7806

F40-44

7806

24M→40K

24.0 - 24.9 mi

Top 68%
×1story
+6ft-20ft

Overall

18046

Females

6975

F40-44

6975

40K→25.2M

24.9 - 25.2 mi

Top 66%
×1story
+13ft-16ft

Overall

17476

Females

6709

F40-44

6709

25.2M→Finish

25.2 - 26.2 mi

Top 69%
×2stories
+22ft-21ft

Overall

18313

Females

7079

F40-44

7079

Passing Analysis

Category:
Athletes Passed
1450
Passed By
1507
Net Change
-57
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#20089
5K → 10K121576-455#20089#20544
10K → 15K131243-112#20544#20656
15K → 20K199126+73#20656#20583
20K → Half3018+12#20583#20571
Half → 25K44268-224#20571#20795
25K → 30K143156-13#20795#20808
30K → 20M13520+115#20808#20693
20M → 21M14620+126#20693#20567
21M → 35K7513+62#20567#20505
35K → 23M15113+138#20505#20367
23M → 24M4931+18#20367#20349
24M → 40K1099+100#20349#20249
40K → 25.2M352+33#20249#20216
25.2M → Finish8212+70#20216#20146
TOTALS14501507-57
📊

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