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BOSTON MARATHON 2023

Olivia Heilbronn

Bib: 25598•F

MA

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
27:19
Rank: #19418
Start → 5K
8:48/mi
27:19 split
10K· 6.21 mi
53:52
Rank: #18936 (+482)
5K → 10K
8:33/mi
26:33 split
15K· 9.32 mi
1:20:15
Rank: #18534 (+402)
10K → 15K
8:30/mi
26:23 split
20K· 12.43 mi
1:46:52
Rank: #18203 (+331)
15K → 20K
8:34/mi
26:37 split
Half· 13.11 mi
1:52:34
Rank: #18123 (+80)
20K → Half
8:21/mi
5:42 split
25K· 15.53 mi
2:13:23
Rank: #17865 (+258)
Half → 25K
8:35/mi
20:49 split
30K· 18.64 mi
2:41:40
Rank: #17791 (+74)
25K → 30K
9:06/mi
28:17 split
20M
2:53:49
Rank: #17676 (+115)
30K → 20M
8:56/mi
12:09 split
21M
3:03:17
Rank: #17561 (+115)
20M → 21M
9:28/mi
9:28 split
35K· 21.75 mi
3:09:51
Rank: #17523 (+38)
21M → 35K
8:47/mi
6:34 split
23M
3:21:03
Rank: #17414 (+109)
35K → 23M
8:57/mi
11:12 split
24M
3:30:03
Rank: #17406 (+8)
23M → 24M
9:00/mi
9:00 split
40K· 24.85 mi
3:37:12
Rank: #17223 (+183)
24M → 40K
8:22/mi
7:09 split
25.2M
3:40:12
Rank: #17132 (+91)
40K → 25.2M
8:42/mi
3:00 split
Finish· 26.22 mi
3:48:33
Rank: #16990 (+142)
25.2M → Finish
8:12/mi
8:21 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:52:34
Pace8:35 /mi
2nd Half
Distance13.11 mi
Time1:55:59
Pace8:51 /mi
📊Positive Split: 3.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:45:0827:198:4827:19
8:48
-
10K
6.21 mi12:11:4153:528:4026:33
8:33
-0:15
15K
9.32 mi12:38:041:20:158:3726:23
8:30
-0:03
20K
12.43 mi13:04:411:46:528:3626:37
8:34
+0:04
Half
13.11 mi13:10:231:52:348:355:42
8:21
-0:13
25K
15.53 mi13:31:122:13:238:3520:49
8:35
+0:14
30K
18.64 mi13:59:292:41:408:4028:17
9:06
+0:31
20M
20.00 mi14:11:382:53:498:4112:09
8:56
-0:10
21M
21.00 mi14:21:063:03:178:449:28
9:28
+0:32
35K
21.75 mi14:27:403:09:518:446:34
8:47
-0:41
23M
23.00 mi14:38:523:21:038:4411:12
8:57
+0:10
24M
24.00 mi14:47:523:30:038:459:00
9:00
+0:03
40K
24.85 mi14:55:013:37:128:447:09
8:22
-0:38
25.2M
25.20 mi14:58:013:40:128:443:00
8:42
+0:20
Finish
26.22 mi15:06:223:48:338:438:21
8:12
-0:30

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

8:12 /mi

Average Pace

8:43 /mi

Slowest Pace

9:28 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:10:48

83% of race

Time at Steady Pace

37:45

17% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:43 /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 mi11:45:0827:198:4827:19
8:48
#19418
10K
6.21 mi12:11:4153:528:4026:33
8:33
#18936
15K
9.32 mi12:38:041:20:158:3726:23
8:30
#18534
20K
12.43 mi13:04:411:46:528:3626:37
8:34
#18203
Half
13.11 mi13:10:231:52:348:355:42
8:21
#18123
25K
15.53 mi13:31:122:13:238:3520:49
8:35
#17865
30K
18.64 mi13:59:292:41:408:4028:17
9:06
#17791
20M
20.00 mi14:11:382:53:498:4112:09
8:56
#17676
21M
21.00 mi14:21:063:03:178:449:28
9:28
#17561
35K
21.75 mi14:27:403:09:518:446:34
8:47
#17523
23M
23.00 mi14:38:523:21:038:4411:12
8:57
#17414
24M
24.00 mi14:47:523:30:038:459:00
9:00
#17406
40K
24.85 mi14:55:013:37:128:447:09
8:22
#17223
25.2M
25.20 mi14:58:013:40:128:443:00
8:42
#17132
Finish
26.22 mi15:06:223:48:338:438:21
8:12
#16990
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi194187452745217761(Top 67%)6367(Top 56%)6367(Top 130%)
10K6.21 mi3.10 mi18936+4827104+3487104+34818535(Top 70%)6788(Top 59%)6788(Top 139%)
15K9.32 mi3.11 mi18534+4026837+2676837+26717761(Top 67%)6367(Top 56%)6367(Top 130%)
20K12.43 mi3.11 mi18203+3316632+2056632+20517287(Top 65%)6098(Top 53%)6098(Top 125%)
Half13.11 mi0.68 mi18123+806581+516581+5116908(Top 64%)5854(Top 51%)5854(Top 120%)
25K15.53 mi2.42 mi17865+2586456+1256456+12516747(Top 63%)5867(Top 51%)5867(Top 120%)
30K18.64 mi3.11 mi17791+746430+266430+2617712(Top 67%)6472(Top 57%)6472(Top 133%)
20M20.00 mi1.36 mi17676+1156378+526378+5216247(Top 61%)5718(Top 50%)5718(Top 117%)
21M21.00 mi1.00 mi17561+1156334+446334+4415833(Top 59%)5536(Top 48%)5536(Top 113%)
35K21.75 mi0.75 mi17523+386324+106324+1016856(Top 63%)6200(Top 54%)6200(Top 127%)
23M23.00 mi1.25 mi17414+1096266+586266+5815792(Top 59%)5630(Top 49%)5630(Top 115%)
24M24.00 mi1.00 mi17406+86273-76273-717251(Top 65%)6489(Top 57%)6489(Top 133%)
40K24.85 mi0.85 mi17223+1836184+896184+8912532(Top 47%)3973(Top 35%)3973(Top 81%)
25.2M25.20 mi0.35 mi17132+916140+446140+4410891(Top 41%)3165(Top 28%)3165(Top 65%)
Finish26.22 mi1.02 mi16990+1426073+676073+6713436(Top 50%)4440(Top 39%)4440(Top 91%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 67%
×21story building
+97ft-345ft

Overall

17761

Females

6367

F18-39

6367

5K→10K

3.1 - 6.2 mi

Top 70%
×5story building
+79ft-138ft

Overall

18535

Females

6788

F18-39

6788

10K→15K

6.2 - 9.3 mi

Top 67%
×3story building
+67ft-78ft

Overall

17761

Females

6367

F18-39

6367

15K→20K

9.3 - 12.4 mi

Top 65%
×5story building
+106ft-86ft

Overall

17287

Females

6098

F18-39

6098

20K→Half

12.4 - 13.1 mi

Top 64%
×2story building
+19ft-37ft

Overall

16908

Females

5854

F18-39

5854

Half→25K

13.1 - 15.5 mi

Top 63%
×4story building
+66ft-88ft

Overall

16747

Females

5867

F18-39

5867

25K→30K

15.5 - 18.6 mi

Top 67%
×9story building
+181ft-148ft

Overall

17712

Females

6472

F18-39

6472

30K→20M

18.6 - 20.0 mi

Top 61%
×5story building
+64ft-50ft

Overall

16247

Females

5718

F18-39

5718

20M→21M

20.0 - 21.0 mi

Top 59%
×8story building
+106ft-24ft

Overall

15833

Females

5536

F18-39

5536

21M→35K

21.0 - 21.8 mi

Top 63%
×7story building
+17ft-86ft

Overall

16856

Females

6200

F18-39

6200

35K→23M

21.8 - 23.0 mi

Top 59%
×5story building
+23ft-63ft

Overall

15792

Females

5630

F18-39

5630

23M→24M

23.0 - 24.0 mi

Top 65%
×6story building
+12ft-82ft

Overall

17251

Females

6489

F18-39

6489

24M→40K

24.0 - 24.9 mi

Top 47%
×1story
+6ft-20ft

Overall

12532

Females

3973

F18-39

3973

40K→25.2M

24.9 - 25.2 mi

Top 41%
×1story
+13ft-16ft

Overall

10891

Females

3165

F18-39

3165

25.2M→Finish

25.2 - 26.2 mi

Top 50%
×2story building
+22ft-21ft

Overall

13436

Females

4440

F18-39

4440

Passing Analysis

Category:
Athletes Passed
3058
Passed By
630
Net Change
+2428
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#19418
5K → 10K645163+482#19418#18936
10K → 15K46361+402#18936#18534
15K → 20K36231+331#18534#18203
20K → Half888+80#18203#18123
Half → 25K28729+258#18123#17865
25K → 30K205131+74#17865#17791
30K → 20M14934+115#17791#17676
20M → 21M15843+115#17676#17561
21M → 35K6527+38#17561#17523
35K → 23M13930+109#17523#17414
23M → 24M6355+8#17414#17406
24M → 40K1896+183#17406#17223
40K → 25.2M910+91#17223#17132
25.2M → Finish15412+142#17132#16990
TOTALS3058630+2428
📊

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