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BOSTON MARATHON 2023

Nicole O'Brien

Bib: 17790•F

CA

0:00
0:00
/ mi
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Division (F18-39)
#0 / 4884
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
28:00
Rank: #20516
Start → 5K
28:00 | 9:01/mi
10K· 6.21 mi
57:56
Rank: #21811 (-1295)
5K → 10K
29:56 | 9:38/mi
15K· 9.32 mi
1:27:38
Rank: #21993 (-182)
10K → 15K
29:42 | 9:34/mi
20K· 12.43 mi
1:56:47
Rank: #21798 (+195)
15K → 20K
29:09 | 9:23/mi
Half· 13.11 mi
2:03:21
Rank: #21830 (-32)
20K → Half
6:34 | 9:37/mi
25K· 15.53 mi
2:26:53
Rank: #21747 (+83)
Half → 25K
23:32 | 9:42/mi
30K· 18.64 mi
2:57:26
Rank: #21539 (+208)
25K → 30K
30:33 | 9:50/mi
20M
3:10:15
Rank: #21322 (+217)
30K → 20M
12:49 | 9:26/mi
21M
3:20:07
Rank: #21131 (+191)
20M → 21M
9:52 | 9:52/mi
35K· 21.75 mi
3:27:14
Rank: #21068 (+63)
21M → 35K
7:07 | 9:31/mi
23M
3:39:20
Rank: #20905 (+163)
35K → 23M
12:06 | 9:40/mi
24M
3:49:35
Rank: #20938 (-33)
23M → 24M
10:15 | 10:15/mi
40K· 24.85 mi
3:57:54
Rank: #20853 (+85)
24M → 40K
8:19 | 9:44/mi
25.2M
4:01:30
Rank: #20821 (+32)
40K → 25.2M
3:36 | 10:26/mi
Finish· 26.22 mi
4:11:05
Rank: #20779 (+42)
25.2M → Finish
9:35 | 9:24/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:03:21
Pace9:25 /mi
2nd Half
Distance13.11 mi
Time2:07:44
Pace9:45 /mi
📊Positive Split: 3.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:18:5228:009:0128:00
9:01
-
10K
6.21 mi11:48:4857:569:1929:56
9:38
+0:37
15K
9.32 mi12:18:301:27:389:2429:42
9:34
-0:04
20K
12.43 mi12:47:391:56:479:2429:09
9:23
-0:11
Half
13.11 mi12:54:132:03:219:256:34
9:37
+0:14
25K
15.53 mi13:17:452:26:539:2723:32
9:42
+0:05
30K
18.64 mi13:48:182:57:269:3130:33
9:50
+0:08
20M
20.00 mi14:01:073:10:159:3112:49
9:26
-0:24
21M
21.00 mi14:10:593:20:079:329:52
9:52
+0:26
35K
21.75 mi14:18:063:27:149:327:07
9:31
-0:21
23M
23.00 mi14:30:123:39:209:3212:06
9:40
+0:09
24M
24.00 mi14:40:273:49:359:3410:15
10:15
+0:35
40K
24.85 mi14:48:463:57:549:348:19
9:44
-0:31
25.2M
25.20 mi14:52:224:01:309:353:36
10:26
+0:42
Finish
26.22 mi15:01:574:11:059:359:35
9:24
-1:02

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

9:01 /mi

Average Pace

9:35 /mi

Slowest Pace

10:26 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:57:14

94% of race

Time at Steady Pace

13:51

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 9:35 /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 mi11:18:5228:009:0128:00
9:01
#20516
10K
6.21 mi11:48:4857:569:1929:56
9:38
#21811
15K
9.32 mi12:18:301:27:389:2429:42
9:34
#21993
20K
12.43 mi12:47:391:56:479:2429:09
9:23
#21798
Half
13.11 mi12:54:132:03:219:256:34
9:37
#21830
25K
15.53 mi13:17:452:26:539:2723:32
9:42
#21747
30K
18.64 mi13:48:182:57:269:3130:33
9:50
#21539
20M
20.00 mi14:01:073:10:159:3112:49
9:26
#21322
21M
21.00 mi14:10:593:20:079:329:52
9:52
#21131
35K
21.75 mi14:18:063:27:149:327:07
9:31
#21068
23M
23.00 mi14:30:123:39:209:3212:06
9:40
#20905
24M
24.00 mi14:40:273:49:359:3410:15
10:15
#20938
40K
24.85 mi14:48:463:57:549:348:19
9:44
#20853
25.2M
25.20 mi14:52:224:01:309:353:36
10:26
#20821
Finish
26.22 mi15:01:574:11:059:359:35
9:24
#20779
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi205168128812822416(Top 84%)9020(Top 79%)9020(Top 185%)
10K6.21 mi3.10 mi21811-12958748-6208748-62022889(Top 86%)9279(Top 81%)9279(Top 190%)
15K9.32 mi3.11 mi21993-1828837-898837-8922416(Top 84%)9020(Top 79%)9020(Top 185%)
20K12.43 mi3.11 mi21798+1958712+1258712+12521208(Top 80%)8349(Top 73%)8349(Top 171%)
Half13.11 mi0.68 mi21830-328731-198731-1922455(Top 84%)9040(Top 79%)9040(Top 185%)
25K15.53 mi2.42 mi21747+838681+508681+5021479(Top 81%)8544(Top 75%)8544(Top 175%)
30K18.64 mi3.11 mi21539+2088580+1018580+10120551(Top 77%)8085(Top 71%)8085(Top 166%)
20M20.00 mi1.36 mi21322+2178477+1038477+10318616(Top 70%)7095(Top 62%)7095(Top 145%)
21M21.00 mi1.00 mi21131+1918391+868391+8617536(Top 66%)6504(Top 57%)6504(Top 133%)
35K21.75 mi0.75 mi21068+638365+268365+2619920(Top 75%)7888(Top 69%)7888(Top 162%)
23M23.00 mi1.25 mi20905+1638280+858280+8518974(Top 71%)7396(Top 65%)7396(Top 151%)
24M24.00 mi1.00 mi20938-338311-318311-3121450(Top 81%)8818(Top 77%)8818(Top 181%)
40K24.85 mi0.85 mi20853+858270+418270+4119142(Top 72%)7569(Top 66%)7569(Top 155%)
25.2M25.20 mi0.35 mi20821+328260+108260+1018953(Top 71%)7494(Top 66%)7494(Top 153%)
Finish26.22 mi1.02 mi20779+428246+148246+1419794(Top 74%)7889(Top 69%)7889(Top 162%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 84%
×21stories
+97ft-345ft

Overall

22416

Females

9020

F18-39

9020

5K→10K

3.1 - 6.2 mi

Top 86%
×5stories
+79ft-138ft

Overall

22889

Females

9279

F18-39

9279

10K→15K

6.2 - 9.3 mi

Top 84%
×3stories
+67ft-78ft

Overall

22416

Females

9020

F18-39

9020

15K→20K

9.3 - 12.4 mi

Top 80%
×5stories
+106ft-86ft

Overall

21208

Females

8349

F18-39

8349

20K→Half

12.4 - 13.1 mi

Top 84%
×2stories
+19ft-37ft

Overall

22455

Females

9040

F18-39

9040

Half→25K

13.1 - 15.5 mi

Top 81%
×4stories
+66ft-88ft

Overall

21479

Females

8544

F18-39

8544

25K→30K

15.5 - 18.6 mi

Top 77%
×9stories
+181ft-148ft

Overall

20551

Females

8085

F18-39

8085

30K→20M

18.6 - 20.0 mi

Top 70%
×5stories
+64ft-50ft

Overall

18616

Females

7095

F18-39

7095

20M→21M

20.0 - 21.0 mi

Top 66%
×8stories
+106ft-24ft

Overall

17536

Females

6504

F18-39

6504

21M→35K

21.0 - 21.8 mi

Top 75%
×7stories
+17ft-86ft

Overall

19920

Females

7888

F18-39

7888

35K→23M

21.8 - 23.0 mi

Top 71%
×5stories
+23ft-63ft

Overall

18974

Females

7396

F18-39

7396

23M→24M

23.0 - 24.0 mi

Top 81%
×6stories
+12ft-82ft

Overall

21450

Females

8818

F18-39

8818

24M→40K

24.0 - 24.9 mi

Top 72%
×1story
+6ft-20ft

Overall

19142

Females

7569

F18-39

7569

40K→25.2M

24.9 - 25.2 mi

Top 71%
×1story
+13ft-16ft

Overall

18953

Females

7494

F18-39

7494

25.2M→Finish

25.2 - 26.2 mi

Top 74%
×2stories
+22ft-21ft

Overall

19794

Females

7889

F18-39

7889

Passing Analysis

Category:
Athletes Passed
1644
Passed By
1907
Net Change
-263
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#20516
5K → 10K221317-1295#20516#21811
10K → 15K99281-182#21811#21993
15K → 20K24853+195#21993#21798
20K → Half1446-32#21798#21830
Half → 25K14259+83#21830#21747
25K → 30K24436+208#21747#21539
30K → 20M2170+217#21539#21322
20M → 21M1965+191#21322#21131
21M → 35K7512+63#21131#21068
35K → 23M1674+163#21068#20905
23M → 24M3669-33#20905#20938
24M → 40K905+85#20938#20853
40K → 25.2M364+32#20853#20821
25.2M → Finish5816+42#20821#20779
TOTALS16441907-263
📊

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