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BOSTON MARATHON 2023

Kimberley Bacastow

Bib: 20145•F

NH

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 48%
Gender (Female)
#0 / 11423
Top 31%
Masters (Masters Women)
#0 / 6539
Top 17%
Division (F45-49)
#0 / 1817
Top 18%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
25:38
Rank: #15812
Start → 5K
25:38 | 8:15/mi
10K· 6.21 mi
50:10
Rank: #14925 (+887)
5K → 10K
24:32 | 7:54/mi
15K· 9.32 mi
1:14:38
Rank: #14417 (+508)
10K → 15K
24:28 | 7:53/mi
20K· 12.43 mi
1:39:22
Rank: #14063 (+354)
15K → 20K
24:44 | 7:58/mi
Half· 13.11 mi
1:44:44
Rank: #14026 (+37)
20K → Half
5:22 | 7:52/mi
25K· 15.53 mi
2:04:05
Rank: #13766 (+260)
Half → 25K
19:21 | 7:59/mi
30K· 18.64 mi
2:29:14
Rank: #13343 (+423)
25K → 30K
25:09 | 8:06/mi
20M
2:40:34
Rank: #13260 (+83)
30K → 20M
11:20 | 8:20/mi
21M
2:48:54
Rank: #13006 (+254)
20M → 21M
8:20 | 8:20/mi
35K· 21.75 mi
2:54:59
Rank: #12985 (+21)
21M → 35K
6:05 | 8:08/mi
23M
3:05:21
Rank: #12903 (+82)
35K → 23M
10:22 | 8:17/mi
24M
3:13:30
Rank: #12864 (+39)
23M → 24M
8:09 | 8:09/mi
40K· 24.85 mi
3:20:31
Rank: #12800 (+64)
24M → 40K
7:01 | 8:12/mi
25.2M
3:23:29
Rank: #12749 (+51)
40K → 25.2M
2:58 | 8:36/mi
Finish· 26.22 mi
3:31:36
Rank: #12713 (+36)
25.2M → Finish
8:07 | 7:58/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:44:44
Pace7:59 /mi
2nd Half
Distance13.11 mi
Time1:46:52
Pace8:09 /mi
📊Positive Split: 2.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:17:5825:388:1525:38
8:15
-
10K
6.21 mi11:42:3050:108:0424:32
7:54
-0:21
15K
9.32 mi12:06:581:14:388:0024:28
7:53
-0:01
20K
12.43 mi12:31:421:39:228:0024:44
7:58
+0:05
Half
13.11 mi12:37:041:44:447:595:22
7:52
-0:06
25K
15.53 mi12:56:252:04:057:5919:21
7:59
+0:07
30K
18.64 mi13:21:342:29:148:0025:09
8:06
+0:07
20M
20.00 mi13:32:542:40:348:0211:20
8:20
+0:14
21M
21.00 mi13:41:142:48:548:038:20
8:20
0:00
35K
21.75 mi13:47:192:54:598:036:05
8:08
-0:12
23M
23.00 mi13:57:413:05:218:0410:22
8:17
+0:09
24M
24.00 mi14:05:503:13:308:048:09
8:09
-0:08
40K
24.85 mi14:12:513:20:318:047:01
8:12
+0:03
25.2M
25.20 mi14:15:493:23:298:042:58
8:36
+0:24
Finish
26.22 mi14:23:563:31:368:058:07
7:58
-0:38

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

7:52 /mi

Average Pace

8:05 /mi

Slowest Pace

8:36 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:58:36

84% of race

Time at Steady Pace

33:00

16% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:04 /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 mi11:17:5825:388:1525:38
8:15
#15812
10K
6.21 mi11:42:3050:108:0424:32
7:54
#14925
15K
9.32 mi12:06:581:14:388:0024:28
7:53
#14417
20K
12.43 mi12:31:421:39:228:0024:44
7:58
#14063
Half
13.11 mi12:37:041:44:447:595:22
7:52
#14026
25K
15.53 mi12:56:252:04:057:5919:21
7:59
#13766
30K
18.64 mi13:21:342:29:148:0025:09
8:06
#13343
20M
20.00 mi13:32:542:40:348:0211:20
8:20
#13260
21M
21.00 mi13:41:142:48:548:038:20
8:20
#13006
35K
21.75 mi13:47:192:54:598:036:05
8:08
#12985
23M
23.00 mi13:57:413:05:218:0410:22
8:17
#12903
24M
24.00 mi14:05:503:13:308:048:09
8:09
#12864
40K
24.85 mi14:12:513:20:318:047:01
8:12
#12800
25.2M
25.20 mi14:15:493:23:298:042:58
8:36
#12749
Finish
26.22 mi14:23:563:31:368:058:07
7:58
#12713
Faster pace
Steady pace
Slower pace
Est.Checkpoint not recorded (estimated)
~Segment time uses estimated prior

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi158125156515613319(Top 50%)3680(Top 32%)3680(Top 203%)
10K6.21 mi3.10 mi14925+8874607+5494607+54913965(Top 52%)4021(Top 35%)4021(Top 221%)
15K9.32 mi3.11 mi14417+5084307+3004307+30013319(Top 50%)3680(Top 32%)3680(Top 203%)
20K12.43 mi3.11 mi14063+3544123+1844123+18413116(Top 49%)3609(Top 32%)3609(Top 199%)
Half13.11 mi0.68 mi14026+374100+234100+2313353(Top 50%)3702(Top 32%)3702(Top 204%)
25K15.53 mi2.42 mi13766+2603967+1333967+13312603(Top 47%)3420(Top 30%)3420(Top 188%)
30K18.64 mi3.11 mi13343+4233749+2183749+21811616(Top 44%)2972(Top 26%)2972(Top 164%)
20M20.00 mi1.36 mi13260+833714+353714+3512587(Top 47%)3642(Top 32%)3642(Top 200%)
21M21.00 mi1.00 mi13006+2543591+1233591+1239477(Top 36%)2150(Top 19%)2150(Top 118%)
35K21.75 mi0.75 mi12985+213599-83599-813020(Top 49%)4006(Top 35%)4006(Top 220%)
23M23.00 mi1.25 mi12903+823576+233576+2311769(Top 44%)3391(Top 30%)3391(Top 187%)
24M24.00 mi1.00 mi12864+393569+73569+712279(Top 46%)3739(Top 33%)3739(Top 206%)
40K24.85 mi0.85 mi12800+643551+183551+1811435(Top 43%)3383(Top 30%)3383(Top 186%)
25.2M25.20 mi0.35 mi12749+513527+243527+2410257(Top 39%)2837(Top 25%)2837(Top 156%)
Finish26.22 mi1.02 mi12713+363529-23529-211897(Top 45%)3654(Top 32%)3654(Top 201%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 50%
×21stories
+97ft-345ft

Overall

13319

Females

3680

F45-49

3680

5K→10K

3.1 - 6.2 mi

Top 52%
×5stories
+79ft-138ft

Overall

13965

Females

4021

F45-49

4021

10K→15K

6.2 - 9.3 mi

Top 50%
×3stories
+67ft-78ft

Overall

13319

Females

3680

F45-49

3680

15K→20K

9.3 - 12.4 mi

Top 49%
×5stories
+106ft-86ft

Overall

13116

Females

3609

F45-49

3609

20K→Half

12.4 - 13.1 mi

Top 50%
×2stories
+19ft-37ft

Overall

13353

Females

3702

F45-49

3702

Half→25K

13.1 - 15.5 mi

Top 47%
×4stories
+66ft-88ft

Overall

12603

Females

3420

F45-49

3420

25K→30K

15.5 - 18.6 mi

Top 44%
×9stories
+181ft-148ft

Overall

11616

Females

2972

F45-49

2972

30K→20M

18.6 - 20.0 mi

Top 47%
×5stories
+64ft-50ft

Overall

12587

Females

3642

F45-49

3642

20M→21M

20.0 - 21.0 mi

Top 36%
×8stories
+106ft-24ft

Overall

9477

Females

2150

F45-49

2150

21M→35K

21.0 - 21.8 mi

Top 49%
×7stories
+17ft-86ft

Overall

13020

Females

4006

F45-49

4006

35K→23M

21.8 - 23.0 mi

Top 44%
×5stories
+23ft-63ft

Overall

11769

Females

3391

F45-49

3391

23M→24M

23.0 - 24.0 mi

Top 46%
×6stories
+12ft-82ft

Overall

12279

Females

3739

F45-49

3739

24M→40K

24.0 - 24.9 mi

Top 43%
×1story
+6ft-20ft

Overall

11435

Females

3383

F45-49

3383

40K→25.2M

24.9 - 25.2 mi

Top 39%
×1story
+13ft-16ft

Overall

10257

Females

2837

F45-49

2837

25.2M→Finish

25.2 - 26.2 mi

Top 45%
×2stories
+22ft-21ft

Overall

11897

Females

3654

F45-49

3654

Passing Analysis

Category:
Athletes Passed
3563
Passed By
464
Net Change
+3099
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#15812
5K → 10K94659+887#15812#14925
10K → 15K54032+508#14925#14417
15K → 20K39945+354#14417#14063
20K → Half5922+37#14063#14026
Half → 25K28727+260#14026#13766
25K → 30K44724+423#13766#13343
30K → 20M13047+83#13343#13260
20M → 21M2606+254#13260#13006
21M → 35K5635+21#13006#12985
35K → 23M12240+82#12985#12903
23M → 24M9253+39#12903#12864
24M → 40K9026+64#12864#12800
40K → 25.2M6110+51#12800#12749
25.2M → Finish7438+36#12749#12713
TOTALS3563464+3099
📊

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