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BOSTON MARATHON 2023

Molly O'Brien

Bib: 25234•F

NY

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

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
8:42/mi
27:02
↑ 97↓ 3451.5%
10K· 6.21 mi
8:48/mi
54:22
↑ 79↓ 1380.4%
15K· 9.32 mi
8:30/mi
1:20:47
↑ 67↓ 78
20K· 12.43 mi
8:59/mi
1:48:43
↑ 106↓ 860.1%
Half· 13.11 mi
8:21/mi
1:54:25
↑ 19↓ 370.5%
25K· 15.53 mi
8:43/mi
2:15:32
↑ 66↓ 880.2%
30K· 18.64 mi
8:56/mi
2:43:17
↑ 181↓ 1480.2%
20M
9:07/mi
2:55:40
↑ 64↓ 500.2%
21M
9:35/mi
3:05:15
↑ 106↓ 241.6%
35K· 21.75 mi
9:05/mi
3:12:03
↑ 17↓ 861.7%
23M
9:28/mi
3:23:54
↑ 23↓ 630.6%
24M
9:43/mi
3:33:37
↓ 821.3%
40K· 24.85 mi
10:30/mi
3:42:36
↓ 200.3%
25.2M
10:35/mi
3:46:15
↑ 13↓ 160.2%
Finish· 26.22 mi
9:42/mi
3:56:08
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:54:25
Pace8:44 /mi
2nd Half
Distance13.11 mi
Time2:01:43
Pace9:17 /mi
📊Positive Split: 6.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:43:0827:028:4227:02
8:42
-
10K
6.21 mi12:10:2854:228:4527:20
8:48
+0:06
15K
9.32 mi12:36:531:20:478:4026:25
8:30
-0:18
20K
12.43 mi13:04:491:48:438:4527:56
8:59
+0:29
Half
13.11 mi13:10:311:54:258:445:42
8:21
-0:38
25K
15.53 mi13:31:382:15:328:4321:07
8:43
+0:22
30K
18.64 mi13:59:232:43:178:4627:45
8:56
+0:13
20M
20.00 mi14:11:462:55:408:4712:23
9:07
+0:11
21M
21.00 mi14:21:213:05:158:499:35
9:35
+0:28
35K
21.75 mi14:28:093:12:038:506:48
9:05
-0:30
23M
23.00 mi14:40:003:23:548:5211:51
9:28
+0:23
24M
24.00 mi14:49:433:33:378:549:43
9:43
+0:15
40K
24.85 mi14:58:423:42:368:578:59
10:30
+0:47
25.2M
25.20 mi15:02:213:46:158:593:39
10:35
+0:05
Finish
26.22 mi15:12:143:56:089:019:53
9:42
-0:53

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

8:21 /mi

Average Pace

9:01 /mi

Slowest Pace

10:35 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:20:16

34% of race

Time at Steady Pace

1:42:12

43% of race

Time at Slower Pace

53:40

23% of race

Average Pace: 9:00 /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 mi11:43:0827:028:4227:02
8:42
#18906
10K
6.21 mi12:10:2854:228:4527:20
8:48
#19404
15K
9.32 mi12:36:531:20:478:4026:25
8:30
#18856
20K
12.43 mi13:04:491:48:438:4527:56
8:59
#19060
Half
13.11 mi13:10:311:54:258:445:42
8:21
#18960
25K
15.53 mi13:31:382:15:328:4321:07
8:43
#18709
30K
18.64 mi13:59:232:43:178:4627:45
8:56
#18331
20M
20.00 mi14:11:462:55:408:4712:23
9:07
#18233
21M
21.00 mi14:21:213:05:158:499:35
9:35
#18090
35K
21.75 mi14:28:093:12:038:506:48
9:05
#18116
23M
23.00 mi14:40:003:23:548:5211:51
9:28
#18133
24M
24.00 mi14:49:433:33:378:549:43
9:43
#18241
40K
24.85 mi14:58:423:42:368:578:59
10:30
#18430
25.2M
25.20 mi15:02:213:46:158:593:39
10:35
#18455
Finish
26.22 mi15:12:143:56:089:019:53
9:42
#18583
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi189067143714317841(Top 67%)6410(Top 56%)6410(Top 131%)
10K6.21 mi3.10 mi19404-4987402-2597402-25919920(Top 75%)7649(Top 67%)7649(Top 157%)
15K9.32 mi3.11 mi18856+5487041+3617041+36117841(Top 67%)6410(Top 56%)6410(Top 131%)
20K12.43 mi3.11 mi19060-2047151-1107151-11019652(Top 74%)7470(Top 65%)7470(Top 153%)
Half13.11 mi0.68 mi18960+1007098+537098+5316926(Top 64%)5872(Top 51%)5872(Top 120%)
25K15.53 mi2.42 mi18709+2516957+1416957+14117442(Top 66%)6253(Top 55%)6253(Top 128%)
30K18.64 mi3.11 mi18331+3786762+1956762+19516843(Top 63%)5978(Top 52%)5978(Top 122%)
20M20.00 mi1.36 mi18233+986722+406722+4017156(Top 64%)6265(Top 55%)6265(Top 128%)
21M21.00 mi1.00 mi18090+1436649+736649+7316383(Top 62%)5849(Top 51%)5849(Top 120%)
35K21.75 mi0.75 mi18116-266670-216670-2118296(Top 69%)6997(Top 61%)6997(Top 143%)
23M23.00 mi1.25 mi18133-176692-226692-2218201(Top 68%)6975(Top 61%)6975(Top 143%)
24M24.00 mi1.00 mi18241-1086763-716763-7119956(Top 75%)7946(Top 70%)7946(Top 163%)
40K24.85 mi0.85 mi18430-1896882-1196882-11921236(Top 80%)8739(Top 77%)8739(Top 179%)
25.2M25.20 mi0.35 mi18455-256901-196901-1919377(Top 73%)7711(Top 68%)7711(Top 158%)
Finish26.22 mi1.02 mi18583-1286984-836984-8320794(Top 78%)8455(Top 74%)8455(Top 173%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 67%
×21story building
+97ft-345ft

Overall

17841

Females

6410

F18-39

6410

5K→10K

3.1 - 6.2 mi

Top 75%
×5story building
+79ft-138ft

Overall

19920

Females

7649

F18-39

7649

10K→15K

6.2 - 9.3 mi

Top 67%
×3story building
+67ft-78ft

Overall

17841

Females

6410

F18-39

6410

15K→20K

9.3 - 12.4 mi

Top 74%
×5story building
+106ft-86ft

Overall

19652

Females

7470

F18-39

7470

20K→Half

12.4 - 13.1 mi

Top 64%
×2story building
+19ft-37ft

Overall

16926

Females

5872

F18-39

5872

Half→25K

13.1 - 15.5 mi

Top 66%
×4story building
+66ft-88ft

Overall

17442

Females

6253

F18-39

6253

25K→30K

15.5 - 18.6 mi

Top 63%
×9story building
+181ft-148ft

Overall

16843

Females

5978

F18-39

5978

30K→20M

18.6 - 20.0 mi

Top 64%
×5story building
+64ft-50ft

Overall

17156

Females

6265

F18-39

6265

20M→21M

20.0 - 21.0 mi

Top 62%
×8story building
+106ft-24ft

Overall

16383

Females

5849

F18-39

5849

21M→35K

21.0 - 21.8 mi

Top 69%
×7story building
+17ft-86ft

Overall

18296

Females

6997

F18-39

6997

35K→23M

21.8 - 23.0 mi

Top 68%
×5story building
+23ft-63ft

Overall

18201

Females

6975

F18-39

6975

23M→24M

23.0 - 24.0 mi

Top 75%
×6story building
+12ft-82ft

Overall

19956

Females

7946

F18-39

7946

24M→40K

24.0 - 24.9 mi

Top 80%
×1story
+6ft-20ft

Overall

21236

Females

8739

F18-39

8739

40K→25.2M

24.9 - 25.2 mi

Top 73%
×1story
+13ft-16ft

Overall

19377

Females

7711

F18-39

7711

25.2M→Finish

25.2 - 26.2 mi

Top 78%
×2story building
+22ft-21ft

Overall

20794

Females

8455

F18-39

8455

Passing Analysis

Category:
Athletes Passed
2118
Passed By
1795
Net Change
+323
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#18906
5K → 10K151649-498#18906#19404
10K → 15K58436+548#19404#18856
15K → 20K102306-204#18856#19060
20K → Half1011+100#19060#18960
Half → 25K27120+251#18960#18709
25K → 30K40931+378#18709#18331
30K → 20M13335+98#18331#18233
20M → 21M18239+143#18233#18090
21M → 35K4167-26#18090#18116
35K → 23M7087-17#18116#18133
23M → 24M24132-108#18133#18241
24M → 40K16205-189#18241#18430
40K → 25.2M1540-25#18430#18455
25.2M → Finish19147-128#18455#18583
TOTALS21181795+323
📊

Passing Visuals

Category:
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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