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BOSTON MARATHON 2023

Courtney Day

Bib: 27078•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
25:46
Rank: #16115
Start → 5K
25:46 | 8:18/mi
10K· 6.21 mi
51:18
Rank: #16218 (-103)
5K → 10K
25:32 | 8:13/mi
15K· 9.32 mi
1:17:26
Rank: #16576 (-358)
10K → 15K
26:08 | 8:25/mi
20K· 12.43 mi
1:44:10
Rank: #16812 (-236)
15K → 20K
26:44 | 8:36/mi
Half· 13.11 mi
1:50:00
Rank: #16888 (-76)
20K → Half
5:50 | 8:33/mi
25K· 15.53 mi
2:11:36
Rank: #17168 (-280)
Half → 25K
21:36 | 8:55/mi
30K· 18.64 mi
2:40:41
Rank: #17490 (-322)
25K → 30K
29:05 | 9:22/mi
20M
2:53:17
Rank: #17513 (-23)
30K → 20M
12:36 | 9:16/mi
21M
3:03:11
Rank: #17515 (-2)
20M → 21M
9:54 | 9:54/mi
35K· 21.75 mi
3:09:53
Rank: #17533 (-18)
21M → 35K
6:42 | 8:57/mi
23M
3:21:34
Rank: #17534 (-1)
35K → 23M
11:41 | 9:20/mi
24M
3:30:52
Rank: #17621 (-87)
23M → 24M
9:18 | 9:18/mi
40K· 24.85 mi
3:38:55
Rank: #17665 (-44)
24M → 40K
8:03 | 9:25/mi
25.2M
3:42:29
Rank: #17699 (-34)
40K → 25.2M
3:34 | 10:21/mi
Finish· 26.22 mi
3:51:22
Rank: #17646 (+53)
25.2M → Finish
8:53 | 8:43/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:50:00
Pace8:23 /mi
2nd Half
Distance13.11 mi
Time2:01:22
Pace9:15 /mi
📊Positive Split: 10.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:42:0925:468:1825:46
8:18
-
10K
6.21 mi12:07:4151:188:1525:32
8:13
-0:05
15K
9.32 mi12:33:491:17:268:1826:08
8:25
+0:12
20K
12.43 mi13:00:331:44:108:2326:44
8:36
+0:11
Half
13.11 mi13:06:231:50:008:235:50
8:33
-0:03
25K
15.53 mi13:27:592:11:368:2821:36
8:55
+0:22
30K
18.64 mi13:57:042:40:418:3729:05
9:22
+0:27
20M
20.00 mi14:09:402:53:178:4012:36
9:16
-0:06
21M
21.00 mi14:19:343:03:118:439:54
9:54
+0:38
35K
21.75 mi14:26:163:09:538:446:42
8:57
-0:57
23M
23.00 mi14:37:573:21:348:4611:41
9:20
+0:23
24M
24.00 mi14:47:153:30:528:479:18
9:18
-0:02
40K
24.85 mi14:55:183:38:558:488:03
9:25
+0:07
25.2M
25.20 mi14:58:523:42:298:503:34
10:21
+0:56
Finish
26.22 mi15:07:453:51:228:508:53
8:43
-1:38

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

8:13 /mi

Average Pace

8:50 /mi

Slowest Pace

10:21 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:50:00

48% of race

Time at Steady Pace

37:11

16% of race

Time at Slower Pace

1:24:11

36% of race

Average Pace: 8:49 /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 mi11:42:0925:468:1825:46
8:18
#16115
10K
6.21 mi12:07:4151:188:1525:32
8:13
#16218
15K
9.32 mi12:33:491:17:268:1826:08
8:25
#16576
20K
12.43 mi13:00:331:44:108:2326:44
8:36
#16812
Half
13.11 mi13:06:231:50:008:235:50
8:33
#16888
25K
15.53 mi13:27:592:11:368:2821:36
8:55
#17168
30K
18.64 mi13:57:042:40:418:3729:05
9:22
#17490
20M
20.00 mi14:09:402:53:178:4012:36
9:16
#17513
21M
21.00 mi14:19:343:03:118:439:54
9:54
#17515
35K
21.75 mi14:26:163:09:538:446:42
8:57
#17533
23M
23.00 mi14:37:573:21:348:4611:41
9:20
#17534
24M
24.00 mi14:47:153:30:528:479:18
9:18
#17621
40K
24.85 mi14:55:183:38:558:488:03
9:25
#17665
25.2M
25.20 mi14:58:523:42:298:503:34
10:21
#17699
Finish
26.22 mi15:07:453:51:228:508:53
8:43
#17646
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi161155359535917235(Top 65%)6066(Top 53%)6066(Top 124%)
10K6.21 mi3.10 mi16218-1035405-465405-4616405(Top 62%)5517(Top 48%)5517(Top 113%)
15K9.32 mi3.11 mi16576-3585650-2455650-24517235(Top 65%)6066(Top 53%)6066(Top 124%)
20K12.43 mi3.11 mi16812-2365812-1625812-16217529(Top 66%)6246(Top 55%)6246(Top 128%)
Half13.11 mi0.68 mi16888-765859-475859-4718041(Top 68%)6505(Top 57%)6505(Top 133%)
25K15.53 mi2.42 mi17168-2806044-1856044-18518500(Top 69%)6843(Top 60%)6843(Top 140%)
30K18.64 mi3.11 mi17490-3226250-2066250-20618869(Top 71%)7124(Top 62%)7124(Top 146%)
20M20.00 mi1.36 mi17513-236289-396289-3917895(Top 67%)6686(Top 59%)6686(Top 137%)
21M21.00 mi1.00 mi17515-26305-166305-1617665(Top 66%)6564(Top 57%)6564(Top 134%)
35K21.75 mi0.75 mi17533-186330-256330-2517744(Top 67%)6692(Top 59%)6692(Top 137%)
23M23.00 mi1.25 mi17534-16342-126342-1217674(Top 66%)6672(Top 58%)6672(Top 137%)
24M24.00 mi1.00 mi17621-876410-686410-6818464(Top 69%)7141(Top 63%)7141(Top 146%)
40K24.85 mi0.85 mi17665-446441-316441-3118035(Top 68%)6964(Top 61%)6964(Top 143%)
25.2M25.20 mi0.35 mi17699-346462-216462-2118626(Top 70%)7288(Top 64%)7288(Top 149%)
Finish26.22 mi1.02 mi17646+536443+196443+1916604(Top 62%)6158(Top 54%)6158(Top 126%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 65%
×21stories
+97ft-345ft

Overall

17235

Females

6066

F18-39

6066

5K→10K

3.1 - 6.2 mi

Top 62%
×5stories
+79ft-138ft

Overall

16405

Females

5517

F18-39

5517

10K→15K

6.2 - 9.3 mi

Top 65%
×3stories
+67ft-78ft

Overall

17235

Females

6066

F18-39

6066

15K→20K

9.3 - 12.4 mi

Top 66%
×5stories
+106ft-86ft

Overall

17529

Females

6246

F18-39

6246

20K→Half

12.4 - 13.1 mi

Top 68%
×2stories
+19ft-37ft

Overall

18041

Females

6505

F18-39

6505

Half→25K

13.1 - 15.5 mi

Top 69%
×4stories
+66ft-88ft

Overall

18500

Females

6843

F18-39

6843

25K→30K

15.5 - 18.6 mi

Top 71%
×9stories
+181ft-148ft

Overall

18869

Females

7124

F18-39

7124

30K→20M

18.6 - 20.0 mi

Top 67%
×5stories
+64ft-50ft

Overall

17895

Females

6686

F18-39

6686

20M→21M

20.0 - 21.0 mi

Top 66%
×8stories
+106ft-24ft

Overall

17665

Females

6564

F18-39

6564

21M→35K

21.0 - 21.8 mi

Top 67%
×7stories
+17ft-86ft

Overall

17744

Females

6692

F18-39

6692

35K→23M

21.8 - 23.0 mi

Top 66%
×5stories
+23ft-63ft

Overall

17674

Females

6672

F18-39

6672

23M→24M

23.0 - 24.0 mi

Top 69%
×6stories
+12ft-82ft

Overall

18464

Females

7141

F18-39

7141

24M→40K

24.0 - 24.9 mi

Top 68%
×1story
+6ft-20ft

Overall

18035

Females

6964

F18-39

6964

40K→25.2M

24.9 - 25.2 mi

Top 70%
×1story
+13ft-16ft

Overall

18626

Females

7288

F18-39

7288

25.2M→Finish

25.2 - 26.2 mi

Top 62%
×2stories
+22ft-21ft

Overall

16604

Females

6158

F18-39

6158

Passing Analysis

Category:
Athletes Passed
1075
Passed By
2606
Net Change
-1531
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#16115
5K → 10K251354-103#16115#16218
10K → 15K87445-358#16218#16576
15K → 20K107343-236#16576#16812
20K → Half783-76#16812#16888
Half → 25K60340-280#16888#17168
25K → 30K87409-322#17168#17490
30K → 20M7699-23#17490#17513
20M → 21M8789-2#17513#17515
21M → 35K4563-18#17515#17533
35K → 23M8990-1#17533#17534
23M → 24M34121-87#17534#17621
24M → 40K3882-44#17621#17665
40K → 25.2M1751-34#17665#17699
25.2M → Finish9037+53#17699#17646
TOTALS10752606-1531
📊

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