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BOSTON MARATHON 2023

Kelly O'Brien

Bib: 21165•F

IL

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Division (F55-59)
#0 / 815
Top 40%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
26:35
Rank: #17950
Start → 5K
26:35 | 8:33/mi
10K· 6.21 mi
53:13
Rank: #18298 (-348)
5K → 10K
26:38 | 8:34/mi
15K· 9.32 mi
1:20:39
Rank: #18770 (-472)
10K → 15K
27:26 | 8:50/mi
20K· 12.43 mi
1:48:25
Rank: #18916 (-146)
15K → 20K
27:46 | 8:56/mi
Half· 13.11 mi
1:54:24
Rank: #18952 (-36)
20K → Half
5:59 | 8:46/mi
25K· 15.53 mi
2:16:05
Rank: #18893 (+59)
Half → 25K
21:41 | 8:57/mi
30K· 18.64 mi
2:45:25
Rank: #18970 (-77)
25K → 30K
29:20 | 9:26/mi
20M
2:58:48
Rank: #19080 (-110)
30K → 20M
13:23 | 9:51/mi
21M
3:08:58
Rank: #19053 (+27)
20M → 21M
10:10 | 10:10/mi
35K· 21.75 mi
3:16:13
Rank: #19118 (-65)
21M → 35K
7:15 | 9:41/mi
23M
3:28:21
Rank: #19125 (-7)
35K → 23M
12:08 | 9:41/mi
24M
3:37:43
Rank: #19089 (+36)
23M → 24M
9:22 | 9:22/mi
40K· 24.85 mi
3:45:54
Rank: #19087 (+2)
24M → 40K
8:11 | 9:34/mi
25.2M
3:49:22
Rank: #19065 (+22)
40K → 25.2M
3:28 | 10:03/mi
Finish· 26.22 mi
3:58:20
Rank: #19008 (+57)
25.2M → Finish
8:58 | 8:48/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:54:24
Pace8:44 /mi
2nd Half
Distance13.11 mi
Time2:03:56
Pace9:27 /mi
📊Positive Split: 8.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:19:4526:358:3326:35
8:33
-
10K
6.21 mi11:46:2353:138:3426:38
8:34
+0:01
15K
9.32 mi12:13:491:20:398:3927:26
8:50
+0:16
20K
12.43 mi12:41:351:48:258:4327:46
8:56
+0:06
Half
13.11 mi12:47:341:54:248:445:59
8:46
-0:10
25K
15.53 mi13:09:152:16:058:4621:41
8:57
+0:11
30K
18.64 mi13:38:352:45:258:5229:20
9:26
+0:29
20M
20.00 mi13:51:582:58:488:5613:23
9:51
+0:25
21M
21.00 mi14:02:083:08:589:0010:10
10:10
+0:19
35K
21.75 mi14:09:233:16:139:017:15
9:41
-0:29
23M
23.00 mi14:21:313:28:219:0412:08
9:41
0:00
24M
24.00 mi14:30:533:37:439:049:22
9:22
-0:19
40K
24.85 mi14:39:043:45:549:058:11
9:34
+0:12
25.2M
25.20 mi14:42:323:49:229:063:28
10:03
+0:29
Finish
26.22 mi14:51:303:58:209:068:58
8:48
-1:15

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

8:33 /mi

Average Pace

9:06 /mi

Slowest Pace

10:10 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:34:25

65% of race

Time at Steady Pace

1:13:45

31% of race

Time at Slower Pace

10:10

4% of race

Average Pace: 9:05 /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 mi11:19:4526:358:3326:35
8:33
#17950
10K
6.21 mi11:46:2353:138:3426:38
8:34
#18298
15K
9.32 mi12:13:491:20:398:3927:26
8:50
#18770
20K
12.43 mi12:41:351:48:258:4327:46
8:56
#18916
Half
13.11 mi12:47:341:54:248:445:59
8:46
#18952
25K
15.53 mi13:09:152:16:058:4621:41
8:57
#18893
30K
18.64 mi13:38:352:45:258:5229:20
9:26
#18970
20M
20.00 mi13:51:582:58:488:5613:23
9:51
#19080
21M
21.00 mi14:02:083:08:589:0010:10
10:10
#19053
35K
21.75 mi14:09:233:16:139:017:15
9:41
#19118
23M
23.00 mi14:21:313:28:219:0412:08
9:41
#19125
24M
24.00 mi14:30:533:37:439:049:22
9:22
#19089
40K
24.85 mi14:39:043:45:549:058:11
9:34
#19087
25.2M
25.20 mi14:42:323:49:229:063:28
10:03
#19065
Finish
26.22 mi14:51:303:58:209:068:58
8:48
#19008
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF55-59Seg. OverallSeg. FemalesSeg. F55-59
5K3.11 mi3.11 mi179506524652419678(Top 74%)7495(Top 66%)7495(Top 920%)
10K6.21 mi3.10 mi18298-3486696-1726696-17218687(Top 70%)6892(Top 60%)6892(Top 846%)
15K9.32 mi3.11 mi18770-4726987-2916987-29119678(Top 74%)7495(Top 66%)7495(Top 920%)
20K12.43 mi3.11 mi18916-1467074-877074-8719404(Top 73%)7325(Top 64%)7325(Top 899%)
Half13.11 mi0.68 mi18952-367093-197093-1919375(Top 73%)7308(Top 64%)7308(Top 897%)
25K15.53 mi2.42 mi18893+597058+357058+3518691(Top 70%)6960(Top 61%)6960(Top 854%)
30K18.64 mi3.11 mi18970-777121-637121-6319225(Top 72%)7317(Top 64%)7317(Top 898%)
20M20.00 mi1.36 mi19080-1107196-757196-7520011(Top 75%)7857(Top 69%)7857(Top 964%)
21M21.00 mi1.00 mi19053+277200-47200-418617(Top 70%)7120(Top 62%)7120(Top 874%)
35K21.75 mi0.75 mi19118-657240-407240-4020454(Top 77%)8196(Top 72%)8196(Top 1006%)
23M23.00 mi1.25 mi19125-77256-167256-1619055(Top 72%)7438(Top 65%)7438(Top 913%)
24M24.00 mi1.00 mi19089+367247+97247+918731(Top 70%)7294(Top 64%)7294(Top 895%)
40K24.85 mi0.85 mi19087+27252-57252-518589(Top 70%)7269(Top 64%)7269(Top 892%)
25.2M25.20 mi0.35 mi19065+227241+117241+1117650(Top 66%)6777(Top 59%)6777(Top 832%)
Finish26.22 mi1.02 mi19008+577214+277214+2717065(Top 64%)6417(Top 56%)6417(Top 787%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 74%
×21stories
+97ft-345ft

Overall

19678

Females

7495

F55-59

7495

5K→10K

3.1 - 6.2 mi

Top 70%
×5stories
+79ft-138ft

Overall

18687

Females

6892

F55-59

6892

10K→15K

6.2 - 9.3 mi

Top 74%
×3stories
+67ft-78ft

Overall

19678

Females

7495

F55-59

7495

15K→20K

9.3 - 12.4 mi

Top 73%
×5stories
+106ft-86ft

Overall

19404

Females

7325

F55-59

7325

20K→Half

12.4 - 13.1 mi

Top 73%
×2stories
+19ft-37ft

Overall

19375

Females

7308

F55-59

7308

Half→25K

13.1 - 15.5 mi

Top 70%
×4stories
+66ft-88ft

Overall

18691

Females

6960

F55-59

6960

25K→30K

15.5 - 18.6 mi

Top 72%
×9stories
+181ft-148ft

Overall

19225

Females

7317

F55-59

7317

30K→20M

18.6 - 20.0 mi

Top 75%
×5stories
+64ft-50ft

Overall

20011

Females

7857

F55-59

7857

20M→21M

20.0 - 21.0 mi

Top 70%
×8stories
+106ft-24ft

Overall

18617

Females

7120

F55-59

7120

21M→35K

21.0 - 21.8 mi

Top 77%
×7stories
+17ft-86ft

Overall

20454

Females

8196

F55-59

8196

35K→23M

21.8 - 23.0 mi

Top 72%
×5stories
+23ft-63ft

Overall

19055

Females

7438

F55-59

7438

23M→24M

23.0 - 24.0 mi

Top 70%
×6stories
+12ft-82ft

Overall

18731

Females

7294

F55-59

7294

24M→40K

24.0 - 24.9 mi

Top 70%
×1story
+6ft-20ft

Overall

18589

Females

7269

F55-59

7269

40K→25.2M

24.9 - 25.2 mi

Top 66%
×1story
+13ft-16ft

Overall

17650

Females

6777

F55-59

6777

25.2M→Finish

25.2 - 26.2 mi

Top 64%
×2stories
+22ft-21ft

Overall

17065

Females

6417

F55-59

6417

Passing Analysis

Category:
Athletes Passed
1118
Passed By
2176
Net Change
-1058
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#17950
5K → 10K166514-348#17950#18298
10K → 15K61533-472#18298#18770
15K → 20K114260-146#18770#18916
20K → Half1753-36#18916#18952
Half → 25K15091+59#18952#18893
25K → 30K139216-77#18893#18970
30K → 20M53163-110#18970#19080
20M → 21M8861+27#19080#19053
21M → 35K2186-65#19053#19118
35K → 23M7582-7#19118#19125
23M → 24M7539+36#19125#19089
24M → 40K4745+2#19089#19087
40K → 25.2M3412+22#19087#19065
25.2M → Finish7821+57#19065#19008
TOTALS11182176-1058
📊

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