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BOSTON MARATHON 2023

Katherine Efird

Bib: 14914•F

NC

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 32%
Gender (Female)
#0 / 11423
Top 13%
Division (F18-39)
#0 / 4884
Top 23%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
23:15
Rank: #9503
Start → 5K
23:15 | 7:29/mi
10K· 6.21 mi
46:40
Rank: #10137 (-634)
5K → 10K
23:25 | 7:32/mi
15K· 9.32 mi
1:09:58
Rank: #10126 (+11)
10K → 15K
23:18 | 7:30/mi
20K· 12.43 mi
1:33:10
Rank: #9803 (+323)
15K → 20K
23:12 | 7:28/mi
Half· 13.11 mi
1:38:11
Rank: #9763 (+40)
20K → Half
5:01 | 7:21/mi
25K· 15.53 mi
1:56:22
Rank: #9566 (+197)
Half → 25K
18:11 | 7:30/mi
30K· 18.64 mi
2:19:40
Rank: #9100 (+466)
25K → 30K
23:18 | 7:30/mi
20M
2:29:53
Rank: #8907 (+193)
30K → 20M
10:13 | 7:31/mi
21M
2:37:48
Rank: #8754 (+153)
20M → 21M
7:55 | 7:55/mi
35K· 21.75 mi
2:43:26
Rank: #8743 (+11)
21M → 35K
5:38 | 7:32/mi
23M
2:53:00
Rank: #8639 (+104)
35K → 23M
9:34 | 7:38/mi
24M
3:00:26
Rank: #8543 (+96)
23M → 24M
7:26 | 7:26/mi
40K· 24.85 mi
3:06:59
Rank: #8493 (+50)
24M → 40K
6:33 | 7:40/mi
25.2M
3:09:48
Rank: #8466 (+27)
40K → 25.2M
2:49 | 8:10/mi
Finish· 26.22 mi
3:17:33
Rank: #8488 (-22)
25.2M → Finish
7:45 | 7:36/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:38:11
Pace7:29 /mi
2nd Half
Distance13.11 mi
Time1:39:22
Pace7:35 /mi
📊Positive Split: 1.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:56:3823:157:2923:15
7:29
-
10K
6.21 mi11:20:0346:407:3123:25
7:32
+0:03
15K
9.32 mi11:43:211:09:587:3023:18
7:30
-0:02
20K
12.43 mi12:06:331:33:107:3023:12
7:28
-0:02
Half
13.11 mi12:11:341:38:117:295:01
7:21
-0:07
25K
15.53 mi12:29:451:56:227:2918:11
7:30
+0:09
30K
18.64 mi12:53:032:19:407:3023:18
7:30
0:00
20M
20.00 mi13:03:162:29:537:3010:13
7:31
+0:01
21M
21.00 mi13:11:112:37:487:317:55
7:55
+0:24
35K
21.75 mi13:16:492:43:267:315:38
7:32
-0:23
23M
23.00 mi13:26:232:53:007:319:34
7:38
+0:06
24M
24.00 mi13:33:493:00:267:317:26
7:26
-0:12
40K
24.85 mi13:40:223:06:597:316:33
7:40
+0:14
25.2M
25.20 mi13:43:113:09:487:322:49
8:10
+0:30
Finish
26.22 mi13:50:563:17:337:327:45
7:36
-0:34

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

7:21 /mi

Average Pace

7:32 /mi

Slowest Pace

8:10 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:14:44

99% of race

Time at Steady Pace

2:49

1% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:32 /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 mi10:56:3823:157:2923:15
7:29
#9503
10K
6.21 mi11:20:0346:407:3123:25
7:32
#10137
15K
9.32 mi11:43:211:09:587:3023:18
7:30
#10126
20K
12.43 mi12:06:331:33:107:3023:12
7:28
#9803
Half
13.11 mi12:11:341:38:117:295:01
7:21
#9763
25K
15.53 mi12:29:451:56:227:2918:11
7:30
#9566
30K
18.64 mi12:53:032:19:407:3023:18
7:30
#9100
20M
20.00 mi13:03:162:29:537:3010:13
7:31
#8907
21M
21.00 mi13:11:112:37:487:317:55
7:55
#8754
35K
21.75 mi13:16:492:43:267:315:38
7:32
#8743
23M
23.00 mi13:26:232:53:007:319:34
7:38
#8639
24M
24.00 mi13:33:493:00:267:317:26
7:26
#8543
40K
24.85 mi13:40:223:06:597:316:33
7:40
#8493
25.2M
25.20 mi13:43:113:09:487:322:49
8:10
#8466
Finish
26.22 mi13:50:563:17:337:327:45
7:36
#8488
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi95031618161810174(Top 38%)1918(Top 17%)1918(Top 39%)
10K6.21 mi3.10 mi10137-6341897-2791897-27910783(Top 41%)2189(Top 19%)2189(Top 45%)
15K9.32 mi3.11 mi10126+111874+231874+2310174(Top 38%)1918(Top 17%)1918(Top 39%)
20K12.43 mi3.11 mi9803+3231753+1211753+1219060(Top 34%)1512(Top 13%)1512(Top 31%)
Half13.11 mi0.68 mi9763+401733+201733+209078(Top 34%)1502(Top 13%)1502(Top 31%)
25K15.53 mi2.42 mi9566+1971673+601673+608795(Top 33%)1474(Top 13%)1474(Top 30%)
30K18.64 mi3.11 mi9100+4661524+1491524+1497227(Top 27%)1010(Top 9%)1010(Top 21%)
20M20.00 mi1.36 mi8907+1931470+541470+546944(Top 26%)1012(Top 9%)1012(Top 21%)
21M21.00 mi1.00 mi8754+1531426+441426+446867(Top 26%)1086(Top 10%)1086(Top 22%)
35K21.75 mi0.75 mi8743+111435-91435-98761(Top 33%)1794(Top 16%)1794(Top 37%)
23M23.00 mi1.25 mi8639+1041423+121423+127390(Top 28%)1332(Top 12%)1332(Top 27%)
24M24.00 mi1.00 mi8543+961408+151408+157287(Top 27%)1396(Top 12%)1396(Top 29%)
40K24.85 mi0.85 mi8493+50140814087741(Top 29%)1648(Top 14%)1648(Top 34%)
25.2M25.20 mi0.35 mi8466+27140814087549(Top 28%)1619(Top 14%)1619(Top 33%)
Finish26.22 mi1.02 mi8488-221434-261434-269322(Top 35%)2380(Top 21%)2380(Top 49%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 38%
×21stories
+97ft-345ft

Overall

10174

Females

1918

F18-39

1918

5K→10K

3.1 - 6.2 mi

Top 41%
×5stories
+79ft-138ft

Overall

10783

Females

2189

F18-39

2189

10K→15K

6.2 - 9.3 mi

Top 38%
×3stories
+67ft-78ft

Overall

10174

Females

1918

F18-39

1918

15K→20K

9.3 - 12.4 mi

Top 34%
×5stories
+106ft-86ft

Overall

9060

Females

1512

F18-39

1512

20K→Half

12.4 - 13.1 mi

Top 34%
×2stories
+19ft-37ft

Overall

9078

Females

1502

F18-39

1502

Half→25K

13.1 - 15.5 mi

Top 33%
×4stories
+66ft-88ft

Overall

8795

Females

1474

F18-39

1474

25K→30K

15.5 - 18.6 mi

Top 27%
×9stories
+181ft-148ft

Overall

7227

Females

1010

F18-39

1010

30K→20M

18.6 - 20.0 mi

Top 26%
×5stories
+64ft-50ft

Overall

6944

Females

1012

F18-39

1012

20M→21M

20.0 - 21.0 mi

Top 26%
×8stories
+106ft-24ft

Overall

6867

Females

1086

F18-39

1086

21M→35K

21.0 - 21.8 mi

Top 33%
×7stories
+17ft-86ft

Overall

8761

Females

1794

F18-39

1794

35K→23M

21.8 - 23.0 mi

Top 28%
×5stories
+23ft-63ft

Overall

7390

Females

1332

F18-39

1332

23M→24M

23.0 - 24.0 mi

Top 27%
×6stories
+12ft-82ft

Overall

7287

Females

1396

F18-39

1396

24M→40K

24.0 - 24.9 mi

Top 29%
×1story
+6ft-20ft

Overall

7741

Females

1648

F18-39

1648

40K→25.2M

24.9 - 25.2 mi

Top 28%
×1story
+13ft-16ft

Overall

7549

Females

1619

F18-39

1619

25.2M→Finish

25.2 - 26.2 mi

Top 35%
×2stories
+22ft-21ft

Overall

9322

Females

2380

F18-39

2380

Passing Analysis

Category:
Athletes Passed
2270*
Passed By
1254
Net Change
+1015
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#9503
5K → 10K108741-634#9503#10137
10K → 15K182171+11#10137#10126
15K → 20K366*43+323#10126#9803
20K → Half5212+40#9803#9763
Half → 25K22528+197#9763#9566
25K → 30K475*9+466#9566#9100
30K → 20M20714+193#9100#8907
20M → 21M17118+153#8907#8754
21M → 35K4534+11#8754#8743
35K → 23M12925+104#8743#8639
23M → 24M12226+96#8639#8543
24M → 40K8535+50#8543#8493
40K → 25.2M4013+27#8493#8466
25.2M → Finish6385-22#8466#8488
TOTALS2270*1254+1015

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

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