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BOSTON MARATHON 2023

Karla Loera

Bib: 20434•F

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Division (F45-49)
#0 / 1817
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
9:06/mi
28:16
↑ 97↓ 3451.5%
10K· 6.21 mi
9:27/mi
57:37
↑ 79↓ 1380.4%
15K· 9.32 mi
9:11/mi
1:26:08
↑ 67↓ 78
20K· 12.43 mi
9:24/mi
1:55:21
↑ 106↓ 860.1%
Half· 13.11 mi
9:11/mi
2:01:37
↑ 19↓ 370.5%
25K· 15.53 mi
9:31/mi
2:24:41
↑ 66↓ 880.2%
30K· 18.64 mi
10:20/mi
2:56:48
↑ 181↓ 1480.2%
20M
10:03/mi
3:10:28
↑ 64↓ 500.2%
21M
13:24/mi
3:23:52
↑ 106↓ 241.6%
35K· 21.75 mi
9:56/mi
3:31:18
↑ 17↓ 861.7%
23M
11:01/mi
3:45:05
↑ 23↓ 630.6%
24M
9:56/mi
3:55:01
↓ 821.3%
40K· 24.85 mi
10:22/mi
4:03:53
↓ 200.3%
25.2M
11:19/mi
4:07:47
↑ 13↓ 160.2%
Finish· 26.22 mi
10:06/mi
4:18:05
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:01:37
Pace9:17 /mi
2nd Half
Distance13.11 mi
Time2:16:28
Pace10:25 /mi
📊Positive Split: 12.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:20:3728:169:0628:16
9:06
-
10K
6.21 mi11:49:5857:379:1629:21
9:27
+0:21
15K
9.32 mi12:18:291:26:089:1428:31
9:11
-0:16
20K
12.43 mi12:47:421:55:219:1729:13
9:24
+0:13
Half
13.11 mi12:53:582:01:379:176:16
9:11
-0:13
25K
15.53 mi13:17:022:24:419:1923:04
9:31
+0:20
30K
18.64 mi13:49:092:56:489:2932:07
10:20
+0:49
20M
20.00 mi14:02:493:10:289:3113:40
10:03
-0:17
21M
21.00 mi14:16:133:23:529:4213:24
13:24
+3:21
35K
21.75 mi14:23:393:31:189:437:26
9:56
-3:28
23M
23.00 mi14:37:263:45:059:4713:47
11:01
+1:05
24M
24.00 mi14:47:223:55:019:489:56
9:56
-1:05
40K
24.85 mi14:56:144:03:539:498:52
10:22
+0:26
25.2M
25.20 mi15:00:084:07:479:503:54
11:19
+0:57
Finish
26.22 mi15:10:264:18:059:5110:18
10:06
-1:13

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

9:06 /mi

Average Pace

9:51 /mi

Slowest Pace

13:24 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:03:03

24% of race

Time at Steady Pace

2:43:57

64% of race

Time at Slower Pace

31:05

12% of race

Average Pace: 9:51 /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 mi11:20:3728:169:0628:16
9:06
#20872
10K
6.21 mi11:49:5857:379:1629:21
9:27
#21651
15K
9.32 mi12:18:291:26:089:1428:31
9:11
#21505
20K
12.43 mi12:47:421:55:219:1729:13
9:24
#21451
Half
13.11 mi12:53:582:01:379:176:16
9:11
#21431
25K
15.53 mi13:17:022:24:419:1923:04
9:31
#21323
30K
18.64 mi13:49:092:56:489:2932:07
10:20
#21433
20M
20.00 mi14:02:493:10:289:3113:40
10:03
#21358
21M
21.00 mi14:16:133:23:529:4213:24
13:24
#21675
35K
21.75 mi14:23:393:31:189:437:26
9:56
#21660
23M
23.00 mi14:37:263:45:059:4713:47
11:01
#21712
24M
24.00 mi14:47:223:55:019:489:56
9:56
#21665
40K
24.85 mi14:56:144:03:539:498:52
10:22
#21649
25.2M
25.20 mi15:00:084:07:479:503:54
11:19
#21640
Finish
26.22 mi15:10:264:18:059:5110:18
10:06
#21639
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi208728309830921239(Top 80%)8365(Top 73%)8365(Top 460%)
10K6.21 mi3.10 mi21651-7798664-3558664-35522359(Top 84%)9012(Top 79%)9012(Top 496%)
15K9.32 mi3.11 mi21505+1468558+1068558+10621239(Top 80%)8365(Top 73%)8365(Top 460%)
20K12.43 mi3.11 mi21451+548528+308528+3021256(Top 80%)8377(Top 73%)8377(Top 461%)
Half13.11 mi0.68 mi21431+208509+198509+1921144(Top 79%)8338(Top 73%)8338(Top 459%)
25K15.53 mi2.42 mi21323+1088442+678442+6720885(Top 78%)8209(Top 72%)8209(Top 452%)
30K18.64 mi3.11 mi21433-1108520-788520-7821860(Top 82%)8823(Top 77%)8823(Top 486%)
20M20.00 mi1.36 mi21358+758497+238497+2320661(Top 78%)8226(Top 72%)8226(Top 453%)
21M21.00 mi1.00 mi21675-3178673-1768673-17624492(Top 92%)10335(Top 90%)10335(Top 569%)
35K21.75 mi0.75 mi21660+158675-28675-221128(Top 79%)8557(Top 75%)8557(Top 471%)
23M23.00 mi1.25 mi21712-528722-478722-4722368(Top 84%)9251(Top 81%)9251(Top 509%)
24M24.00 mi1.00 mi21665+478707+158707+1520609(Top 77%)8332(Top 73%)8332(Top 459%)
40K24.85 mi0.85 mi21649+168706+18706+120929(Top 79%)8560(Top 75%)8560(Top 471%)
25.2M25.20 mi0.35 mi21640+98708-28708-221165(Top 80%)8687(Top 76%)8687(Top 478%)
Finish26.22 mi1.02 mi21639+18713-58713-522064(Top 83%)9148(Top 80%)9148(Top 503%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 80%
×21story building
+97ft-345ft

Overall

21239

Females

8365

F45-49

8365

5K→10K

3.1 - 6.2 mi

Top 84%
×5story building
+79ft-138ft

Overall

22359

Females

9012

F45-49

9012

10K→15K

6.2 - 9.3 mi

Top 80%
×3story building
+67ft-78ft

Overall

21239

Females

8365

F45-49

8365

15K→20K

9.3 - 12.4 mi

Top 80%
×5story building
+106ft-86ft

Overall

21256

Females

8377

F45-49

8377

20K→Half

12.4 - 13.1 mi

Top 79%
×2story building
+19ft-37ft

Overall

21144

Females

8338

F45-49

8338

Half→25K

13.1 - 15.5 mi

Top 78%
×4story building
+66ft-88ft

Overall

20885

Females

8209

F45-49

8209

25K→30K

15.5 - 18.6 mi

Top 82%
×9story building
+181ft-148ft

Overall

21860

Females

8823

F45-49

8823

30K→20M

18.6 - 20.0 mi

Top 78%
×5story building
+64ft-50ft

Overall

20661

Females

8226

F45-49

8226

20M→21M

20.0 - 21.0 mi

Top 92%
×8story building
+106ft-24ft

Overall

24492

Females

10335

F45-49

10335

21M→35K

21.0 - 21.8 mi

Top 79%
×7story building
+17ft-86ft

Overall

21128

Females

8557

F45-49

8557

35K→23M

21.8 - 23.0 mi

Top 84%
×5story building
+23ft-63ft

Overall

22368

Females

9251

F45-49

9251

23M→24M

23.0 - 24.0 mi

Top 77%
×6story building
+12ft-82ft

Overall

20609

Females

8332

F45-49

8332

24M→40K

24.0 - 24.9 mi

Top 79%
×1story
+6ft-20ft

Overall

20929

Females

8560

F45-49

8560

40K→25.2M

24.9 - 25.2 mi

Top 80%
×1story
+13ft-16ft

Overall

21165

Females

8687

F45-49

8687

25.2M→Finish

25.2 - 26.2 mi

Top 83%
×2story building
+22ft-21ft

Overall

22064

Females

9148

F45-49

9148

Passing Analysis

Category:
Athletes Passed
1113
Passed By
1880
Net Change
-767
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#20872
5K → 10K59838-779#20872#21651
10K → 15K23993+146#21651#21505
15K → 20K159105+54#21505#21451
20K → Half3919+20#21451#21431
Half → 25K14638+108#21431#21323
25K → 30K86196-110#21323#21433
30K → 20M11136+75#21433#21358
20M → 21M8325-317#21358#21675
21M → 35K4833+15#21675#21660
35K → 23M49101-52#21660#21712
23M → 24M6417+47#21712#21665
24M → 40K4327+16#21665#21649
40K → 25.2M2920+9#21649#21640
25.2M → Finish3332+1#21640#21639
TOTALS11131880-767
📊

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