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BOSTON MARATHON 2023

Libby Miller

Bib: 25965•F

MD

0:00
0:00
/ mi
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Top 45%
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
24:14
Rank: #12364
Start → 5K
24:14 | 7:48/mi
10K· 6.21 mi
48:36
Rank: #12912 (-548)
5K → 10K
24:22 | 7:51/mi
15K· 9.32 mi
1:13:32
Rank: #13498 (-586)
10K → 15K
24:56 | 8:02/mi
20K· 12.43 mi
1:38:52
Rank: #13746 (-248)
15K → 20K
25:20 | 8:09/mi
Half· 13.11 mi
1:44:20
Rank: #13780 (-34)
20K → Half
5:28 | 8:01/mi
25K· 15.53 mi
2:04:25
Rank: #13940 (-160)
Half → 25K
20:05 | 8:17/mi
30K· 18.64 mi
2:32:44
Rank: #14760 (-820)
25K → 30K
28:19 | 9:07/mi
20M
2:44:59
Rank: #14903 (-143)
30K → 20M
12:15 | 9:01/mi
21M
2:54:45
Rank: #15039 (-136)
20M → 21M
9:46 | 9:46/mi
35K· 21.75 mi
3:01:03
Rank: #15020 (+19)
21M → 35K
6:18 | 8:25/mi
23M
3:12:39
Rank: #15129 (-109)
35K → 23M
11:36 | 9:16/mi
24M
3:21:54
Rank: #15303 (-174)
23M → 24M
9:15 | 9:15/mi
40K· 24.85 mi
3:29:46
Rank: #15393 (-90)
24M → 40K
7:52 | 9:12/mi
25.2M
3:33:14
Rank: #15426 (-33)
40K → 25.2M
3:28 | 10:03/mi
Finish· 26.22 mi
3:41:48
Rank: #15397 (+29)
25.2M → Finish
8:34 | 8:24/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:44:20
Pace7:58 /mi
2nd Half
Distance13.11 mi
Time1:57:28
Pace8:58 /mi
📊Positive Split: 12.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:39:3624:147:4824:14
7:48
-
10K
6.21 mi12:03:5848:367:4924:22
7:51
+0:03
15K
9.32 mi12:28:541:13:327:5324:56
8:02
+0:11
20K
12.43 mi12:54:141:38:527:5725:20
8:09
+0:07
Half
13.11 mi12:59:421:44:207:585:28
8:01
-0:08
25K
15.53 mi13:19:472:04:258:0120:05
8:17
+0:16
30K
18.64 mi13:48:062:32:448:1228:19
9:07
+0:50
20M
20.00 mi14:00:212:44:598:1512:15
9:01
-0:06
21M
21.00 mi14:10:072:54:458:199:46
9:46
+0:45
35K
21.75 mi14:16:253:01:038:196:18
8:25
-1:21
23M
23.00 mi14:28:013:12:398:2311:36
9:16
+0:51
24M
24.00 mi14:37:163:21:548:259:15
9:15
-0:01
40K
24.85 mi14:45:083:29:468:267:52
9:12
-0:03
25.2M
25.20 mi14:48:363:33:148:283:28
10:03
+0:51
Finish
26.22 mi14:57:103:41:488:288:34
8:24
-1:39

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

7:48 /mi

Average Pace

8:28 /mi

Slowest Pace

10:03 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:19:00

36% of race

Time at Steady Pace

1:00:17

27% of race

Time at Slower Pace

1:22:31

37% of race

Average Pace: 8:28 /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 mi11:39:3624:147:4824:14
7:48
#12364
10K
6.21 mi12:03:5848:367:4924:22
7:51
#12912
15K
9.32 mi12:28:541:13:327:5324:56
8:02
#13498
20K
12.43 mi12:54:141:38:527:5725:20
8:09
#13746
Half
13.11 mi12:59:421:44:207:585:28
8:01
#13780
25K
15.53 mi13:19:472:04:258:0120:05
8:17
#13940
30K
18.64 mi13:48:062:32:448:1228:19
9:07
#14760
20M
20.00 mi14:00:212:44:598:1512:15
9:01
#14903
21M
21.00 mi14:10:072:54:458:199:46
9:46
#15039
35K
21.75 mi14:16:253:01:038:196:18
8:25
#15020
23M
23.00 mi14:28:013:12:398:2311:36
9:16
#15129
24M
24.00 mi14:37:163:21:548:259:15
9:15
#15303
40K
24.85 mi14:45:083:29:468:267:52
9:12
#15393
25.2M
25.20 mi14:48:363:33:148:283:28
10:03
#15426
Finish
26.22 mi14:57:103:41:488:288:34
8:24
#15397
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi123643083308314615(Top 55%)4458(Top 39%)4458(Top 91%)
10K6.21 mi3.10 mi12912-5483393-3103393-31013517(Top 51%)3741(Top 33%)3741(Top 77%)
15K9.32 mi3.11 mi13498-5863749-3563749-35614615(Top 55%)4458(Top 39%)4458(Top 91%)
20K12.43 mi3.11 mi13746-2483936-1873936-18714645(Top 55%)4496(Top 39%)4496(Top 92%)
Half13.11 mi0.68 mi13780-343948-123948-1214576(Top 55%)4445(Top 39%)4445(Top 91%)
25K15.53 mi2.42 mi13940-1604078-1304078-13014864(Top 56%)4746(Top 42%)4746(Top 97%)
30K18.64 mi3.11 mi14760-8204590-5124590-51217768(Top 67%)6503(Top 57%)6503(Top 133%)
20M20.00 mi1.36 mi14903-1434708-1184708-11816625(Top 62%)5927(Top 52%)5927(Top 121%)
21M21.00 mi1.00 mi15039-1364824-1164824-11617123(Top 64%)6258(Top 55%)6258(Top 128%)
35K21.75 mi0.75 mi15020+194825-14825-114881(Top 56%)5036(Top 44%)5036(Top 103%)
23M23.00 mi1.25 mi15129-1094920-954920-9517363(Top 65%)6479(Top 57%)6479(Top 133%)
24M24.00 mi1.00 mi15303-1745045-1255045-12518262(Top 69%)7030(Top 62%)7030(Top 144%)
40K24.85 mi0.85 mi15393-905121-765121-7617104(Top 64%)6458(Top 57%)6458(Top 132%)
25.2M25.20 mi0.35 mi15426-335149-285149-2817611(Top 66%)6738(Top 59%)6738(Top 138%)
Finish26.22 mi1.02 mi15397+295146+35146+314808(Top 56%)5157(Top 45%)5157(Top 106%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 55%
×21stories
+97ft-345ft

Overall

14615

Females

4458

F18-39

4458

5K→10K

3.1 - 6.2 mi

Top 51%
×5stories
+79ft-138ft

Overall

13517

Females

3741

F18-39

3741

10K→15K

6.2 - 9.3 mi

Top 55%
×3stories
+67ft-78ft

Overall

14615

Females

4458

F18-39

4458

15K→20K

9.3 - 12.4 mi

Top 55%
×5stories
+106ft-86ft

Overall

14645

Females

4496

F18-39

4496

20K→Half

12.4 - 13.1 mi

Top 55%
×2stories
+19ft-37ft

Overall

14576

Females

4445

F18-39

4445

Half→25K

13.1 - 15.5 mi

Top 56%
×4stories
+66ft-88ft

Overall

14864

Females

4746

F18-39

4746

25K→30K

15.5 - 18.6 mi

Top 67%
×9stories
+181ft-148ft

Overall

17768

Females

6503

F18-39

6503

30K→20M

18.6 - 20.0 mi

Top 62%
×5stories
+64ft-50ft

Overall

16625

Females

5927

F18-39

5927

20M→21M

20.0 - 21.0 mi

Top 64%
×8stories
+106ft-24ft

Overall

17123

Females

6258

F18-39

6258

21M→35K

21.0 - 21.8 mi

Top 56%
×7stories
+17ft-86ft

Overall

14881

Females

5036

F18-39

5036

35K→23M

21.8 - 23.0 mi

Top 65%
×5stories
+23ft-63ft

Overall

17363

Females

6479

F18-39

6479

23M→24M

23.0 - 24.0 mi

Top 69%
×6stories
+12ft-82ft

Overall

18262

Females

7030

F18-39

7030

24M→40K

24.0 - 24.9 mi

Top 64%
×1story
+6ft-20ft

Overall

17104

Females

6458

F18-39

6458

40K→25.2M

24.9 - 25.2 mi

Top 66%
×1story
+13ft-16ft

Overall

17611

Females

6738

F18-39

6738

25.2M→Finish

25.2 - 26.2 mi

Top 56%
×2stories
+22ft-21ft

Overall

14808

Females

5157

F18-39

5157

Passing Analysis

Category:
Athletes Passed
820
Passed By
3853
Net Change
-3033
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#12364
5K → 10K128676-548#12364#12912
10K → 15K64650-586#12912#13498
15K → 20K111359-248#13498#13746
20K → Half1751-34#13746#13780
Half → 25K88248-160#13780#13940
25K → 30K33853-820#13940#14760
30K → 20M43186-143#14760#14903
20M → 21M52188-136#14903#15039
21M → 35K6041+19#15039#15020
35K → 23M47156-109#15020#15129
23M → 24M33207-174#15129#15303
24M → 40K34124-90#15303#15393
40K → 25.2M2558-33#15393#15426
25.2M → Finish8556+29#15426#15397
TOTALS8203853-3033
📊

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