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BOSTON MARATHON 2023

Sandra Diaz

Bib: 19506•F

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Top 43%
Masters (Masters Women)
#0 / 6539
Top 30%
Division (F40-44)
#0 / 1878
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
8:46/mi
27:15
↑ 97↓ 3451.5%
10K· 6.21 mi
8:38/mi
54:05
↑ 79↓ 1380.4%
15K· 9.32 mi
8:33/mi
1:20:39
↑ 67↓ 78
20K· 12.43 mi
8:30/mi
1:47:03
↑ 106↓ 860.1%
Half· 13.11 mi
8:24/mi
1:52:47
↑ 19↓ 370.5%
25K· 15.53 mi
8:12/mi
2:12:39
↑ 66↓ 880.2%
30K· 18.64 mi
8:22/mi
2:38:38
↑ 181↓ 1480.2%
20M
8:28/mi
2:50:09
↑ 64↓ 500.2%
21M
8:56/mi
2:59:05
↑ 106↓ 241.6%
35K· 21.75 mi
8:03/mi
3:05:06
↑ 17↓ 861.7%
23M
8:04/mi
3:15:12
↑ 23↓ 630.6%
24M
7:38/mi
3:22:50
↓ 821.3%
40K· 24.85 mi
7:35/mi
3:29:19
↓ 200.3%
25.2M
8:30/mi
3:32:15
↑ 13↓ 160.2%
Finish· 26.22 mi
7:33/mi
3:39:57
↑ 22↓ 21

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time1:52:47
Pace8:36 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:47:10
Pace8:11 /mi
📊Negative Split: 5.0% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:24:4727:158:4627:15
8:46
-
10K
6.21 mi11:51:3754:058:4226:50
8:38
-0:08
15K
9.32 mi12:18:111:20:398:3926:34
8:33
-0:05
20K
12.43 mi12:44:351:47:038:3726:24
8:30
-0:03
Half
13.11 mi12:50:191:52:478:365:44
8:24
-0:06
25K
15.53 mi13:10:112:12:398:3219:52
8:12
-0:12
30K
18.64 mi13:36:102:38:388:3125:59
8:22
+0:10
20M
20.00 mi13:47:412:50:098:3011:31
8:28
+0:06
21M
21.00 mi13:56:372:59:058:328:56
8:56
+0:28
35K
21.75 mi14:02:383:05:068:316:01
8:03
-0:53
23M
23.00 mi14:12:443:15:128:2910:06
8:04
+0:01
24M
24.00 mi14:20:223:22:508:277:38
7:38
-0:26
40K
24.85 mi14:26:513:29:198:256:29
7:35
-0:03
25.2M
25.20 mi14:29:473:32:158:252:56
8:30
+0:55
Finish
26.22 mi14:37:293:39:578:247:42
7:33
-0:57

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

7:33 /mi

Average Pace

8:24 /mi

Slowest Pace

8:56 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

57:48

26% of race

Time at Steady Pace

2:33:13

70% of race

Time at Slower Pace

8:56

4% of race

Average Pace: 8:23 /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 mi11:24:4727:158:4627:15
8:46
#19298
10K
6.21 mi11:51:3754:058:4226:50
8:38
#19124
15K
9.32 mi12:18:111:20:398:3926:34
8:33
#18767
20K
12.43 mi12:44:351:47:038:3726:24
8:30
#18290
Half
13.11 mi12:50:191:52:478:365:44
8:24
#18230
25K
15.53 mi13:10:112:12:398:3219:52
8:12
#17569
30K
18.64 mi13:36:102:38:388:3125:59
8:22
#16830
20M
20.00 mi13:47:412:50:098:3011:31
8:28
#16582
21M
21.00 mi13:56:372:59:058:328:56
8:56
#16363
35K
21.75 mi14:02:383:05:068:316:01
8:03
#16216
23M
23.00 mi14:12:443:15:128:2910:06
8:04
#15862
24M
24.00 mi14:20:223:22:508:277:38
7:38
#15554
40K
24.85 mi14:26:513:29:198:256:29
7:35
#15262
25.2M
25.20 mi14:29:473:32:158:252:56
8:30
#15144
Finish
26.22 mi14:37:293:39:578:247:42
7:33
#14938
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi192987383738318156(Top 68%)6589(Top 58%)6589(Top 351%)
10K6.21 mi3.10 mi19124+1747230+1537230+15319052(Top 72%)7108(Top 62%)7108(Top 378%)
15K9.32 mi3.11 mi18767+3576984+2466984+24618156(Top 68%)6589(Top 58%)6589(Top 351%)
20K12.43 mi3.11 mi18290+4776684+3006684+30016834(Top 63%)5838(Top 51%)5838(Top 311%)
Half13.11 mi0.68 mi18230+606651+336651+3317156(Top 64%)5972(Top 52%)5972(Top 318%)
25K15.53 mi2.42 mi17569+6616275+3766275+37614204(Top 53%)4344(Top 38%)4344(Top 231%)
30K18.64 mi3.11 mi16830+7395864+4115864+41113447(Top 51%)4004(Top 35%)4004(Top 213%)
20M20.00 mi1.36 mi16582+2485745+1195745+11913503(Top 51%)4132(Top 36%)4132(Top 220%)
21M21.00 mi1.00 mi16363+2195634+1115634+11113066(Top 49%)3987(Top 35%)3987(Top 212%)
35K21.75 mi0.75 mi16216+1475562+725562+7212501(Top 47%)3720(Top 33%)3720(Top 198%)
23M23.00 mi1.25 mi15862+3545374+1885374+18810277(Top 39%)2648(Top 23%)2648(Top 141%)
24M24.00 mi1.00 mi15554+3085216+1585216+1588686(Top 33%)1973(Top 17%)1973(Top 105%)
40K24.85 mi0.85 mi15262+2925030+1865030+1867271(Top 27%)1490(Top 13%)1490(Top 79%)
25.2M25.20 mi0.35 mi15144+1184974+564974+569706(Top 36%)2589(Top 23%)2589(Top 138%)
Finish26.22 mi1.02 mi14938+2064872+1024872+1029022(Top 34%)2273(Top 20%)2273(Top 121%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 68%
×21story building
+97ft-345ft

Overall

18156

Females

6589

F40-44

6589

5K→10K

3.1 - 6.2 mi

Top 72%
×5story building
+79ft-138ft

Overall

19052

Females

7108

F40-44

7108

10K→15K

6.2 - 9.3 mi

Top 68%
×3story building
+67ft-78ft

Overall

18156

Females

6589

F40-44

6589

15K→20K

9.3 - 12.4 mi

Top 63%
×5story building
+106ft-86ft

Overall

16834

Females

5838

F40-44

5838

20K→Half

12.4 - 13.1 mi

Top 64%
×2story building
+19ft-37ft

Overall

17156

Females

5972

F40-44

5972

Half→25K

13.1 - 15.5 mi

Top 53%
×4story building
+66ft-88ft

Overall

14204

Females

4344

F40-44

4344

25K→30K

15.5 - 18.6 mi

Top 51%
×9story building
+181ft-148ft

Overall

13447

Females

4004

F40-44

4004

30K→20M

18.6 - 20.0 mi

Top 51%
×5story building
+64ft-50ft

Overall

13503

Females

4132

F40-44

4132

20M→21M

20.0 - 21.0 mi

Top 49%
×8story building
+106ft-24ft

Overall

13066

Females

3987

F40-44

3987

21M→35K

21.0 - 21.8 mi

Top 47%
×7story building
+17ft-86ft

Overall

12501

Females

3720

F40-44

3720

35K→23M

21.8 - 23.0 mi

Top 39%
×5story building
+23ft-63ft

Overall

10277

Females

2648

F40-44

2648

23M→24M

23.0 - 24.0 mi

Top 33%
×6story building
+12ft-82ft

Overall

8686

Females

1973

F40-44

1973

24M→40K

24.0 - 24.9 mi

Top 27%
×1story
+6ft-20ft

Overall

7271

Females

1490

F40-44

1490

40K→25.2M

24.9 - 25.2 mi

Top 36%
×1story
+13ft-16ft

Overall

9706

Females

2589

F40-44

2589

25.2M→Finish

25.2 - 26.2 mi

Top 34%
×2story building
+22ft-21ft

Overall

9022

Females

2273

F40-44

2273

Passing Analysis

Category:
Athletes Passed
4736
Passed By
376
Net Change
+4360
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#19298
5K → 10K449275+174#19298#19124
10K → 15K41659+357#19124#18767
15K → 20K49417+477#18767#18290
20K → Half644+60#18290#18230
Half → 25K6621+661#18230#17569
25K → 30K7390+739#17569#16830
30K → 20M2524+248#16830#16582
20M → 21M2256+219#16582#16363
21M → 35K1481+147#16363#16216
35K → 23M3573+354#16216#15862
23M → 24M3091+308#15862#15554
24M → 40K2920+292#15554#15262
40K → 25.2M1202+118#15262#15144
25.2M → Finish2093+206#15144#14938
TOTALS4736376+4360
📊

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