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BOSTON MARATHON 2023

Sandra Lorenz

Bib: 31593•F

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Division (F50-54)
#0 / 1207
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
9:16/mi
28:47
↑ 97↓ 3451.5%
10K· 6.21 mi
9:51/mi
59:22
↑ 79↓ 1380.4%
15K· 9.32 mi
10:22/mi
1:31:35
↑ 67↓ 78
20K· 12.43 mi
11:37/mi
2:07:41
↑ 106↓ 860.1%
Half· 13.11 mi
11:32/mi
2:15:33
↑ 19↓ 370.5%
25K· 15.53 mi
12:57/mi
2:46:58
↑ 66↓ 880.2%
30K· 18.64 mi
12:56/mi
3:27:09
↑ 181↓ 1480.2%
20M
13:37/mi
3:45:39
↑ 64↓ 500.2%
21M
13:53/mi
3:59:32
↑ 106↓ 241.6%
35K· 21.75 mi
11:55/mi
4:08:27
↑ 17↓ 861.7%
23M
11:56/mi
4:23:24
↑ 23↓ 630.6%
24M
12:03/mi
4:35:27
↓ 821.3%
40K· 24.85 mi
11:50/mi
4:45:34
↓ 200.3%
25.2M
13:52/mi
4:50:21
↑ 13↓ 160.2%
Finish· 26.22 mi
11:36/mi
5:02:10
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:15:33
Pace10:20 /mi
2nd Half
Distance13.11 mi
Time2:46:37
Pace12:43 /mi
📊Positive Split: 22.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:47:4828:479:1628:47
9:16
-
10K
6.21 mi12:18:2359:229:3330:35
9:51
+0:35
15K
9.32 mi12:50:361:31:359:5032:13
10:22
+0:31
20K
12.43 mi13:26:422:07:4110:1636:06
11:37
+1:15
Half
13.11 mi13:34:342:15:3310:207:52
11:32
-0:05
25K
15.53 mi14:05:592:46:5810:4531:25
12:57
+1:25
30K
18.64 mi14:46:103:27:0911:0740:11
12:56
-0:01
20M
20.00 mi15:04:403:45:3911:1718:30
13:37
+0:41
21M
21.00 mi15:18:333:59:3211:2413:53
13:53
+0:16
35K
21.75 mi15:27:284:08:2711:258:55
11:55
-1:58
23M
23.00 mi15:42:254:23:2411:2714:57
11:56
+0:01
24M
24.00 mi15:54:284:35:2711:2912:03
12:03
+0:07
40K
24.85 mi16:04:354:45:3411:2910:07
11:50
-0:13
25.2M
25.20 mi16:09:224:50:2111:314:47
13:52
+2:02
Finish
26.22 mi16:21:115:02:1011:3211:49
11:36
-2:16

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

9:16 /mi

Average Pace

11:32 /mi

Slowest Pace

13:53 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:31:35

30% of race

Time at Steady Pace

1:41:49

34% of race

Time at Slower Pace

1:48:46

36% of race

Average Pace: 11:31 /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 mi11:47:4828:479:1628:47
9:16
#21430
10K
6.21 mi12:18:2359:229:3330:35
9:51
#22478
15K
9.32 mi12:50:361:31:359:5032:13
10:22
#23217
20K
12.43 mi13:26:422:07:4110:1636:06
11:37
#23970
Half
13.11 mi13:34:342:15:3310:207:52
11:32
#24077
25K
15.53 mi14:05:592:46:5810:4531:25
12:57
#24633
30K
18.64 mi14:46:103:27:0911:0740:11
12:56
#24856
20M
20.00 mi15:04:403:45:3911:1718:30
13:37
#24962
21M
21.00 mi15:18:333:59:3211:2413:53
13:53
#24988
35K
21.75 mi15:27:284:08:2711:258:55
11:55
#24973
23M
23.00 mi15:42:254:23:2411:2714:57
11:56
#24930
24M
24.00 mi15:54:284:35:2711:2912:03
12:03
#24941
40K
24.85 mi16:04:354:45:3411:2910:07
11:50
#24892
25.2M
25.20 mi16:09:224:50:2111:314:47
13:52
#24905
Finish
26.22 mi16:21:115:02:1011:3211:49
11:36
#24917
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi214308597859724222(Top 91%)10018(Top 88%)10018(Top 830%)
10K6.21 mi3.10 mi22478-10489093-4969093-49623369(Top 88%)9550(Top 84%)9550(Top 791%)
15K9.32 mi3.11 mi23217-7399467-3749467-37424222(Top 91%)10018(Top 88%)10018(Top 830%)
20K12.43 mi3.11 mi23970-7539873-4069873-40625381(Top 95%)10706(Top 94%)10706(Top 887%)
Half13.11 mi0.68 mi24077-1079942-699942-6925520(Top 96%)10796(Top 95%)10796(Top 894%)
25K15.53 mi2.42 mi24633-55610264-32210264-32225846(Top 97%)10989(Top 96%)10989(Top 910%)
30K18.64 mi3.11 mi24856-22310406-14210406-14225360(Top 95%)10767(Top 94%)10767(Top 892%)
20M20.00 mi1.36 mi24962-10610475-6910475-6925613(Top 96%)10915(Top 96%)10915(Top 904%)
21M21.00 mi1.00 mi24988-2610501-2610501-2624934(Top 94%)10575(Top 93%)10575(Top 876%)
35K21.75 mi0.75 mi24973+1510500+110500+124613(Top 92%)10460(Top 92%)10460(Top 867%)
23M23.00 mi1.25 mi24930+4310482+1810482+1823930(Top 90%)10085(Top 88%)10085(Top 836%)
24M24.00 mi1.00 mi24941-1110493-1110493-1124601(Top 92%)10486(Top 92%)10486(Top 869%)
40K24.85 mi0.85 mi24892+4910472+2110472+2123681(Top 89%)10035(Top 88%)10035(Top 831%)
25.2M25.20 mi0.35 mi24905-1310482-1010482-1024913(Top 94%)10650(Top 93%)10650(Top 882%)
Finish26.22 mi1.02 mi24917-1210494-1210494-1224812(Top 93%)10568(Top 93%)10568(Top 876%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 91%
×21story building
+97ft-345ft

Overall

24222

Females

10018

F50-54

10018

5K→10K

3.1 - 6.2 mi

Top 88%
×5story building
+79ft-138ft

Overall

23369

Females

9550

F50-54

9550

10K→15K

6.2 - 9.3 mi

Top 91%
×3story building
+67ft-78ft

Overall

24222

Females

10018

F50-54

10018

15K→20K

9.3 - 12.4 mi

Top 95%
×5story building
+106ft-86ft

Overall

25381

Females

10706

F50-54

10706

20K→Half

12.4 - 13.1 mi

Top 96%
×2story building
+19ft-37ft

Overall

25520

Females

10796

F50-54

10796

Half→25K

13.1 - 15.5 mi

Top 97%
×4story building
+66ft-88ft

Overall

25846

Females

10989

F50-54

10989

25K→30K

15.5 - 18.6 mi

Top 95%
×9story building
+181ft-148ft

Overall

25360

Females

10767

F50-54

10767

30K→20M

18.6 - 20.0 mi

Top 96%
×5story building
+64ft-50ft

Overall

25613

Females

10915

F50-54

10915

20M→21M

20.0 - 21.0 mi

Top 94%
×8story building
+106ft-24ft

Overall

24934

Females

10575

F50-54

10575

21M→35K

21.0 - 21.8 mi

Top 92%
×7story building
+17ft-86ft

Overall

24613

Females

10460

F50-54

10460

35K→23M

21.8 - 23.0 mi

Top 90%
×5story building
+23ft-63ft

Overall

23930

Females

10085

F50-54

10085

23M→24M

23.0 - 24.0 mi

Top 92%
×6story building
+12ft-82ft

Overall

24601

Females

10486

F50-54

10486

24M→40K

24.0 - 24.9 mi

Top 89%
×1story
+6ft-20ft

Overall

23681

Females

10035

F50-54

10035

40K→25.2M

24.9 - 25.2 mi

Top 94%
×1story
+13ft-16ft

Overall

24913

Females

10650

F50-54

10650

25.2M→Finish

25.2 - 26.2 mi

Top 93%
×2story building
+22ft-21ft

Overall

24812

Females

10568

F50-54

10568

Passing Analysis

Category:
Athletes Passed
314
Passed By
3801
Net Change
-3487
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#21430
5K → 10K211069-1048#21430#22478
10K → 15K17756-739#22478#23217
15K → 20K8761-753#23217#23970
20K → Half5112-107#23970#24077
Half → 25K11567-556#24077#24633
25K → 30K33256-223#24633#24856
30K → 20M11117-106#24856#24962
20M → 21M2551-26#24962#24988
21M → 35K3217+15#24988#24973
35K → 23M5512+43#24973#24930
23M → 24M2132-11#24930#24941
24M → 40K567+49#24941#24892
40K → 25.2M619-13#24892#24905
25.2M → Finish1325-12#24905#24917
TOTALS3143801-3487
📊

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